HomeMy WebLinkAboutAgenda Packet City Council - 11/16/2023 Lw,A-)5r.,f,�r Citi/ of Cornus Christi 1201 Leopard Street
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\ Meeting Agenda - Final
City Council
Thursday, November 16, 2023 12:00 PM American Bank Center, 1901 N Shoreline Blvd,
2nd Floor Watergarden Room A
Joint Workshop of the City Council and Planning Commission
Public Notice: ITEMS ON THIS AGENDA ARE FOR INFORMATIONAL
PURPOSES ONLY. NO ACTION WILL BE TAKEN AND NO PUBLIC COMMENT WILL BE
SOLICITED.
A. Mayor Paulette Guajardo to call the meeting to order.
B. City Secretary Rebecca L. Huerta to call the roll of the City Council, Planning
Commission, and required Charter Officers.
C. Introductions and Discussion Guidelines
D. BRIEFINGS:
Briefing information will be provided to the City Council during the Council meeting.
Briefings are for Council information only. No action will be taken and no public comment
will be solicited. The City Manager or City Council Liaison for any city board,
commission, committee or corporation(including Type A or B Corporation) may report on
the action(s) or discussion(s) of any such body's public meeting that occurred within one
month prior to this City Council meeting.
1. 23-1863 Land Use, Master Plans, and Capital Improvement Program (CIP) projects
sponsors: Development Services
E. ADJOURNMENT
City of Corpus Christi Page 1 Printed on 11/17/2023
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iy,ogPORpgq AGENDA MEMORANDUM
1852 City Council/Planning Commission Joint Workshop November 16, 2023
DATE: November 10, 2023
TO: Peter Zanoni, City Manager
FROM: Al Raymond, Director of Development Services
alraymond@cctexas.com
361-826-3575
Land Use, Master Plans, and Capital Improvement Program (CIP Projects)
STAFF PRESENTER(S):
Name Title/Position Department
1. Al Raymond III Director DSD
2. Michael Dice Assistant Director DSD
OUTSIDE PRESENTER(S):
Name Title/Position Agency Name
1. Kim Keefer Vice President Pape-Dawson Engineers
2. Cara Tackett Managing Principal Pape-Dawson Engineers
BACKGROUND:
This meeting will be an in-depth discussion of the updated Future Land Use
Assumptions (how was the information derived, what data sets were utilized, etc.); the
comprehensive Master Plans (developed to move the City from 2023 to 2033); and the
resulting Capital Improvement Program (the CIP's necessary to grow the City over the
next 10 years).
LIST OF SUPPORTING DOCUMENTS:
CC Master Plan-Water
CC Master Plan-Wastewater
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✓CORPONP�E�
1852 Water Master Plan Summary
DATE: November 16, 2023
City of Corpus Christi Water Master Plan Executive Summary:
In March 2021, the City of Corpus Christi contracted with Pape Dawson Engineers to develop a
Master Plan for the City's Water Infrastructure. Previously, the City had identified overall
system improvements without the perspective of when the improvements would be needed. The
City had initiated a system wide elevated storage study due to some City pressure issues.
Pape-Dawson provided comprehensive master planning and engineering services for the
development of a Water Master Plan, including land use assumptions, with recommendations
for improvements in accordance with: Local Government Code Title 12, Planning and
Development, Subtitle C. Planning and Development provisions applying to more than one type
of local government, Chapter 395- Financing Capital Improvements Required By New
Development In Municipalities, Counties, And Certain Other Local Governments. This master
plan is comprehensive in nature, looking at the system holistically, integrating pumping, ground
storage, elevated storage transmission and distribution into one cohesive study.
Pape-Dawson defined study areas based on pressure zones, reviewed proposed land use
assumptions, and determined the projected growth in water for a ten (10)year planning period.
This is a key difference from previous master plans-the derivation of improvements through
time. This Master Plan consist of two (2) service areas: the Mainland and the Island. System
improvements include: adding water transmission grid mains; adding distribution lines; adding
additional water storage tanks; and improvements to the water treatment plant.
This includes reviewing the existing water system infrastructure and capital improvement plan
for the water system, both in terms of near-term, 10-year and ultimate improvements. The
estimated costs of implementing all proposed projects were also included as part of the updated
master plan.
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PAPE-DAWSON
ENGINEERS
Transportation Water Resources I Land Development I Surveying Environmental
TABLE OF CONTENTS
1. INTRODUCTION .........................................................................................1-1
1.1. General Overview......................................................................................................................1-1
1.2. Outline of Scope.........................................................................................................................1-2
1.2. 1. Land Use Assumptions Update..........................................................................................1-2
1,2.2, Collect and Review of Existing Data...................................................................................1-2
1,2.3. Flow and Usage Development...........................................................................................1-3
11.4. Water Supply Strategies and Evaluation............................................................................1-3
1.2.5, Existing System Review......................................................................................................1-3
1,2.6, Future Flows and Project Prioritization .............................................................................1-4
1.2.7, Water Treatment Plant Asset Evaluation...........................................................................1-4
1.1& Water Pump Station and Storage Tank Evaluation............................................................1-5
1.2.9. Capital Improvement and Master Plan development. ......................................................1-5
1.3. Capital Improvement Advisory Council......................................................................................1-6
2. WATER DISTRIBUTION SYSTEM..................................................................2-1
2.1. Water Assets..............................................................................................................................2-1
2.1:1. Water Sources....................................................................................................................2-1
2.1.1.1. Choke Canyon Reservoir............................................................................................2-1
2.1.1.2. Lake Corpus Christi.....................................................................................................2-1
2.1.1.3. Lake Texana................................................................................................................2-1
2.1.1.4. Colorado River............................................................................................................2-2
2.1.2, Water treatment plant.......................................................................................................2-2
11.3. Storage Tanks.....................................................................................................................2-2
2.1.4, Distribution System............................................................................................................2-2
3. LAND USE ASSUMPTIONS ..........................................................................3-1
3.1. Area Development Plans............................................................................................................3-1
3.2. Projected Growth Rate ..............................................................................................................3-2
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3.3. Land Use.....................................................................................................................................3-6
4. WATER FLOWS...........................................................................................4-1
4.1. Master Plan methodology..........................................................................................................4-1
4.2. Existing Water Flows..................................................................................................................4-1
4.3. Future Flows...............................................................................................................................4-1
5 WATER SYSTEM EVALUATION....................................................................5-1
6. COST FACTORS...........................................................................................6-1
7. CAPITAL IMPROVEMENTS.............................................................................2
LIST OF TABLES
Table 3-1 Projected Annual Growth by households..................................................................................3-2
Table 3-2 Projected Annual Growth by Employees...................................................................................3-3
Table 3-3 MPO Annual Growth Rate vs. Annual Growth Rate by Lot Additioins.......................................3-3
Table 3-4 Historic Growth Rate by ADP.....................................................................................................3-4
Table 3-5 Growth Rates Reviewed and Selected.......................................................................................3-5
Table 3-6 Projected 10-Year Commercial and Residental Growth by ADP...............................................3-6
Table4-1. Water Demands........................................................................................................................4-1
Table 7-1 Near Term Improvements.............................................................................................................2
Table 7-2 10-Year Improvements .................................................................................................................3
LIST OF APPENDICES
Appendix A.
ii
I\ITRODUCTION
Corpus Christi Water (CCW) is responsible for the maintenance, operation, management, and expansion
of water treatment and distribution for the City of Corpus Christi,Texas (City) and surrounding areas and
it the water provider for a large surrounding region. Water distribution within the City and surrounding
region must meet local, state, and federal regulatory requirements and the reasonable expectations of
the public for a healthy, safe, and thriving community. This Water System Master Plan is an overarching
planning document intended to guide policy on maintenance, improvement, and expansion of water
services through a foreseeable planning horizon (ten years), and for the long term beyond the initial
horizon. This plan sets forth identified areas where repair, replacement or upgrades of existing
infrastructure are recommended to maintain service at acceptable levels and where upgraded and new
infrastructure may be required to support ongoing growth and development. Proposed capital
improvement, repair, and upgrade projects are recommended and general cost data is provided.
The water system was evaluated by Lockwood, Andrews & Newnam, Inc. (LAN) as a sub-consultant to
Pape Dawson Engineers. Information provide herein is based on LAN's review, analysis, and
recommendations.
1.1. General Overview
On February 9, 2021,the City Council of the City of Corpus Christi, by Resolution 032350, approved Pape-
Dawson Engineers to develop Master Planning and Impact Fee Studies for water,wastewater,stormwater
and transportation.
This Water System Master Plan has been developed in accordance with Texas Local Government Code
Title 12, Planning and Development, Subtitle C, Planning and Development Provisions Applying to More
Than One Type of Local Government, Chapter 395 — Financing Capital Improvements Required by New
Development in Municipalities,Counties,and Certain other Local Governments(Chapter 395). In addition,
existing local codes and regulations including the City's Infrastructure Design Manual (IDM), Unified
Development Code (UDC); minimum standards set forth by the Texas Commission on Environmental
Quality (TCEQ), and other relevant state and federal codes and regulations were considered in providing
development, upgrade, and maintenance recommendations. Existing system conditions, The City's
Comprehensive Plan,Area Development Plans, current and past Master Plans, Master Plan amendments,
existing studies, billing information, usage and flow data, and land use information have been collected,
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reviewed, and assessed to develop planning and development guidance through a ten-year planning
period and an ultimate buildout condition. This Master Plan meets the requirements of Chapter 395 for
use in evaluating impacts related to development and identified projects and related costs are
apportioned for maintenance and improvement of existing service separately from projects and costs
related to new development. Where projects address both current needs and development costs are
apportioned accordingly.
1.2. Outline of Scope
Development of this comprehensive master plan for the City Corpus Christi Water System was
accomplished through a series of tasks as outlined below:
1.2.1. Land Use Assumptions Update
Updated Land Use Assumptions (LUAs) are necessary to accurately assess current and future water
system demand and infrastructure needs. Comprehensive master plans,Area Development Plans,
platting and building permit history, along with adopted current and future Land Uses from the City
were reviewed to provide updated LUAs. Land use assumptions are based on past and present
development patterns, current and projected land use, current and projected zoning, projected
population growth and patterns, and input from city Staff and the community.
1,2,2. Collect and Review of Existing Data
Data and documents reviewed in conjunction with the development of this Master Plan include, but are
not limited to:
• City of Corpus Christi water network GIS files.
• Existing Water Master Plan
• Information on Elevated Storage Tanks.
• Water flow records (Monitoring, Water Treatment Plant (WTP)volumes.
• Water system plans (as-built drawings, record drawings, construction plans), including plans for
currently proposed projects.
• Water Certificate of Convenience and Necessity(CNN) boundaries.
• City bid tabulations for water projects for the last 5 years.
• Existing design standards and operation procedures.
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• Hydraulic modeling provided by the City's Consultant CP&Y.
1.2.5. Flow and Usage Development
The City recently completed a review of its elevated storage tanks. According to CP&Y(the City's
elevated storage review consultant), the average daily flow within the model increases from 62 MGD
(year 2011)to 82.5 MGD in Year 2025. Using the land uses determined in II, Consultant will compare
water data within the City's existing 2011-2025 model for consistency with the land use plan. Consultant
shall also review the preliminary raw water mater plan information being completed by others for
consistency in projections through the planning period In addition, Consultant will develop flows for the
planning period (beyond year 2025) for incorporation back into the water model, further described in
Section Prioritization of this task.The objective of this task is to conform the 10-year flow assumptions
for use across all water system components (raw water, treatment, and distribution). a reasonable
assessment of the inflow and infiltration component.
1,2.4. Water Supply Strategies and Evaluation
Raw water supply strategies being developed by others were reviewed to identify key information
required for incorporation into the impact fee analysis. Implementations of any recommendations from
previous evaluations, remaining recommendations for the previous evaluations and ability for the
existing water system to supply current, 5-year and 10-year planned flows and recommended
improvements will be evaluated in terms of growth versus retrofit and maintenance-related
improvements. As this plan is focused near-term (0-3 years), mid-term (3-7 years) and long-term (7-10
years)flows, excluded from this scope are evaluations long-term (>10 year) alternative water supply
strategies.
1.2.5. Existing System Review
CP&Y has completed an existing system review as part of their elevated storage report.This report
included recommendations for a renewed Pipe Reinvestment Program.This program would replace
pipes at the end of their useful life or adversely affected by the new elevated storage tanks. It is
Consultant's understanding that the existing distribution system has been adequately evaluated for
piping needs as part of CP&Y's efforts.
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There are current projects identified in the City's Capital Improvement Plan that will need to be
evaluated to determine the portion associated with maintenance-related versus growth-related costs.
These include:
• Citywide Water Distribution System Indefinite Delivery/Indefinite Quantity Program
• San Patricio Municipal Water District Transmission Main Connection
• Yorktown Boulevard Water Line Extension
• Water Line Replacement Program
• Elevated Water Storage Tanks-Citywide
1.2,6. Future Flows and Project Prioritization
The existing model developed as part of CP&Y's efforts included a planning period through 2025.
Modifications necessary to conform the distribution system projected flows past year 2025 for were
developed as part of this planning effort to provide ten-year and ultimate buildout projections. CP&Y
completed the post-2025 modelling efforts under direction from the City. Regular communication and
meetings with CP&Y were completed to coordinate the model imputes and results.
1.2.7. Water Treatment Plant Asset Evaluation
Conditions and capacity of the Stevens Water Treatment Plant were completed and included:
• Review of previous evaluations prepared within the last five years. Using information provided
by the city and determine which, if any, of the recommendations from the previous evaluations
have been implemented and which recommendations are remaining. Using this existing
information, evaluate if existing facilities have the capacity to meet projected 5-year and 10-
year flow demands. Provide a list of recommended improvements to meet flow demands.The
focus of this evaluation will be only on high-level unit processes.\
• Visiting the WTP site to observe major unit processes and meeting with WTP staff to review data
collected and discuss history of plant operations, confirm/clarify observations, and obtain
information on current operations and identified needs.
• Evaluate current projects identified in the City's and the Texas Water Development Board
(TWDB) Region N capital improvement plans to determine the portion associated with
maintenance-related versus growth-related costs These include and are limited to:
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o ONSWTP High Service Building No. 3.
o ONSWTP Raw Water Influent and Chemical Facilities Improvements.
o ONSWTP On-Site Hypochlorite Generation.
o ONSWTP Solids Handling and Disposal Facilities.
o ONSWTP Site Infrastructure Improvements.
o ONSWTP Sedimentation Basin Improvements.
o ONSWTP Clearwell No. 3.
o ONSWTP Filtration System Hydraulic Improvements
1.2.8. Water Pump Station and Storage Tank Evaluation
Condition and capacity of existing pump station and storage tank facilities was completed and included:
• Review of previous evaluations prepared within the last five years using information provided by
the city. Recommendations from the previous evaluations that have been implemented and
those remaining were reviewed to evaluate current capacity and ability to meet projected 10-
year flow demands.
• A list of recommended improvements to meet flow demands were developed.
• Meetings were conducted Operations and Maintenance staff to review data collected and
discuss history of pump station operations and maintenance concerns.
1.2,9. Capital Improvement and Master Plan development.
The current Capital Improvement Plan was reviewed with the information developed under the previous
tasks. Projects that were included in this review are:
• Future Transmission Mains (12-inch and up).
• Existing and Future Elevated Storage Tanks.
• Existing and Future Ground Storage Tanks.
• Existing and Future Pump Stations.
• Existing and Future Water Treatment Plant Facilities. Citywide Lift Station Repair.
These projects and associated projected costs were reviewed to assess the overall impact to the water
system and to provide an apportionment of maintenance and service improvement related costs
separately from development related costs.
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New projects were identified and developed to meet projected water maintenance and service needs
for the 10-year horizon and ultimate buildout conditions. Probable costs for identified projects were
developed using historic costs data from recent projects in the city, information provided by local
construction contractors, and accepted costs estimating methods.
This Master Plan was then developed by compiling the information, data, analysis, and results from the
various tasks as described.
1.3. Capital Improvement Advisory Council
In accordance with Chapter 395,the City established a Capital Improvement Advisory Council (CIAC)that
was tasked with overseeing and guiding the development of the Master Plan and the associated Capital
Improvement Program. Composition of the CIAC is fifteen members appointed by the City council of
which at least six members represent the real estate, development, or building industry. AS noted by the
City's description of the CIAC:
"The committee shall serve in an advisory capacity; advise and assist the City Council in adopting land
use assumptions; review the capital improvements plan, land use assumptions and impact fees, and file
written comments in accordance with Chapter 395 of the Texas Local Government Code; monitor and
evaluate the implementation of the capital improvements plan; file semiannual reports with respect to
the progress of the capital improvements plan and report to City Council any perceived inequities in
implementing the plan or imposing the impact fee; and advise the City Council of the need to update or
revise the land use assumptions, capital improvements plan, and impact fee."
Members of CIAC were regularly briefed on the development of the Master Plan, provided information
as it was developed, and provided input and recommendations.
1-6
2. WATER DISTRIBUTION SYSTEM
A general description of the water treatment, storage and distribution assets is provided as a baseline
for planning and proposed development. As maintenance, modification, upgrades, and new
development are ongoing activities, conditions as described in this section are general in nature and will
change with time.
2.1. Water Assets
CCW provided water to the City Corpus Christi and a surrounding seven-county region covering 140
square miles. Serving over 500,000 residents the Corpus Christi Water System comprises four surface
water sources, the ON Stevens Water Treatment Plant, 9 water storage tanks, and over 1,700 miles of
distribution pipe.
2.1.1. Water Sources
Raw water is currently obtained from four surface resources and is then routed to the ON Stevens plant
for treatment to potable standards, or distributed, untreated, to bulk use customers.
2.1.1.1. Choke Canyon Reservoir
Choke Canyon Reservoir is located on the Frio River approximately 62 miles northwest of Corpus Christi.
Covering 25,670 acres the reservoir has a storage capacity of 695,271 acre-feet and water discharges
into the Nueces River basin and flows downstream to the ON Stevens Treatment plant.
2.1.1.2. Lake Corpus Christi
Lake Corpus Christi is located on the Nueces River approximately 25 miles northwest of Corpus Christi.
Covering 19,336 acres this reservoir provides storage of 242,241 acre-feet of water. Water from Lake
Corpus Christi flows into the Nueces River and downstream to the ON Stevens Wastewater treatment
Plant.
2.1.1.3. Lake Texana
Lake Texana is located on the Navidad River approximately 92 miles northeast of Corpus Christi. Lake
Texana and covers 8,611 acres and has a storage capacity of 158,975 acre-feet and approximately 45
percent of the current raw water supply the City comes from this reservoir. Water is pumped to the ON
Stevens WTP through the 101 mile long, 64-inch diameter Mary Rhodes pipeline.
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2.1.1.4. Colorado River
Water rights on the Colorado River were purchased and an additional 42 miles of pipeline constructed
(Mary Rhodes Pipeline Phase II)to provide an additional water source. Currently approximately five
percent of the water demand is provided from the Colorado River.
2.1.2. Water treatment plant.
Potable water for the region is treated at the ON Stevens WTP. Raw water is drawn from the Nueces
river and the Mary Rhodes pipeline for treatment to potable standards and distribution throughout the
region.
2.1.3, Storage Tanks
There is was a separate study completed by CP&Y(now STV)that was not available for independent
review but included as projects identified by CCW.
2.1.4. Distribution System
The existing system was analyzed for improvements needed to address present-day system issues. For
this analysis,the study used the peak hour demand scenario of the City's existing hydraulic model to
represent the worst-case scenario. Analysis of the existing system results indicated that except for
locations in the vicinity of ESTs or upstream of pump stations, the minimum pressure at all other
locations was above 35 psi, satisfying Texas Commission on Environmental Quality (TCEQ) requirements.
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3. LAND USE ASSUMPTIONS
Demand on public infrastructure is a function of the population, where that population lives and works,
and how the land within the service area of the public system is used. Evaluation of the future demands
on the Water System related to development requires a reasonable assessment of the increase in
population, where and how new development occurs, and changes in land use and population density.
Taken together these parameters are referred to as Land Use Assumptions (LUAs).
Projections for growth in employees and households are regularly conducted by the Corpus Christi
Metropolitan Planning Organization (MPO). Current projections were used as an initial point in the
development of Land Use Assumptions and evaluating future demands on the water system.
3.1. Area Development Plans
To improve City-wide planning, zoning, and land use assumptions the City Planning Department has
divided the city into nine planning areas (Bayside, Corpus Christi Airport, Downtown, Flour Bluff,
London, Northwest, Padre/Mustang Island, Southside, and Westside) and has developed planning
documents for each area.These Area Development Plans (ADPs) are based on current and projected
land usage and on projected needs based on the character, land use, population, and anticipated
development of the individual areas. Projections for each area can be combined to provide overall City-
wide Land Use Assumptions.
In addition to the ADPs currently in place, a tenth planning area located between the Northwest ADP,
the City of Robstown,Texas, and west of Interstate 69 has been identified and used in the master plan
development.This tenth planning area is referred to as the Calallen Planning Development Area. Error!
Reference source not found. shows the PDAs used in developing the land use assumptions.
Both the London and Calallen planning areas extend into the City's ETJ outside of the City Limits.
Development in these areas is occurring and is expected to continue to occur with related annexation of
the land and extension of City services. Master planning for extension of water services in these areas is
provided like planning within the city limits. Additional development of land in the ETJ is expected to
follow the growth patterns of the adjacent ADP and is assumed to follow the established land use
patterns. Significant portions of the ETJ are located north of Corpus Christi Bay and Nueces Bay(See
Error! Reference source not found.).
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There are no City owned services in these areas and development is not expected to be significant
within the planning horizons of this Master Plan. Planning efforts have not been included for areas of
the ETJ where costs to extend water services are high and significant development is not expected to
occur for an extended period.
3.2. Projected Growth Rate
Growth projections are developed and updated by the Metropolitan Planning Organization. Data from
the MPO projections was initially used to calculate a predicted annual growth rate based on increase in
households and the projected increase in employees from 2021 to 2031. Project growth rates were
calculated using the following equation.
i
/2031 households/employees\number of years
Percent Annual Growth = l /I — 1 100
2021 households/emplyees
As an example, in the Downtown ADP, the number of current households is 3,794. In 2031, it is
projected that the number of households in this ADP may be 4,919.This is a difference of 1,124 and
correlates to a 2.6 percent growth per year in households. Similar methodology was used for projected
increases in employees.
Projected annual growth based on households and employees are shown in Table 3-1 and Table 3-2.
Table 3-1 Projected Annual Growth by households
ADP 2021 2031 Annual Growth
2031 Less 2021
Households Households in households
Bayside 31,508 32,478 970 0.3%
Calallen 1,310 2,201 891 5.3%
CC Airport 1,582 2,228 646 3.5%
Downtown 3,794 4,919 1,125 2.6%
Flour Bluff 8,006 8,573 567 0.7%
London 1,100 1,720 620 4.6%
Northwest 12,152 15,194 3,042 2.3%
Padre/Mustang Island 5,987 7,295 1,308 2.0%
Southside 41,601 47,130 5,529 1.3%
Westside 18,533 19,978 1,445 0.8%
Total 125,573 141,716 16,143 1.2%
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Table 3-2 Projected Annual Growth by Employees
2021 2031 Annual
ADP Employees Employees 2031 Less 2021 Growth in
Employees
Bayside 25,887 26,342 455 0.2%
Calallen 3,502 4,093 591 1.6%
CC Airport 8,927 10,755 1,828 1.9%
Downtown 17,328 17,450 122 0.1%
Flour Bluff 11,725 12,077 352 0.3%
London 423 732 309 5.6%
Northwest 11,536 13,307 1,771 1.4%
Padre/Mustang Island 2,666 3,431 765 2.6%
Southside 26,898 30,226 3,328 1.2%
Westside 31,253 33,767 2,514 0.8%
Total 140,145 152,180 12,035 0.8%
According to the US Census Bureau, the City of Corpus Christi had an annual growth rate of 0.4 percent
from 2010 to 2020.The data from the MPO projections shows a more robust growth rate is anticipated
over the next ten-year period.
City records of lots added in each ADP from January 1, 2020, to January 25, 2022,were then used to
generate an annual growth rate for the last two years.The MPO baseline number for 2021 households
was used in conjunction with the lots added data from the city using the same formula to generate an
annual growth rate based on the lot added information.The growth rate from lots added is compared to
the MPO Households growth rate in Table 3-3.
Table 3-3 MPO Annual Growth Rate vs.Annual Growth Rate by Lot Additioins
MPO Annual Average Annual Lot
ADP Residential Units MPO Annual Annual Lot Addition
Added Growth Rate Addition Growth Rate
Bayside 97 0.3% 60 0.2%
Calallen 80 5.3% 24 1.8%
CC Airport 65 4.1% 0 0.0%
Downtown 112 3.0% 5 0.5%
Flour Bluff 57 0.7% 112 1.4%
London 288 4.6% 225 4.5%
Northwest 304 2.5% 71 0.6%
Padre/Mustang Island 131 2.2% 36 0.6%
Southside 553 1.3% 421 1.0%
Westside 145 0.8% 70 0.4%
Total 1,832 1.3% 1024 0.8%
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In addition, the City provided growth rate information from previous time periods for six of the ADPs,
which was included in the overall evaluation of growth rates. Historic growth rate and the associated
period are provided in Table 3-4.
Table 3-4 Historic Growth Rate by ADP
ADP Time Period Growth Trend
Bayside 2010-2021 0.15%
Calallen No Data
CC Airport No Data
Downtown No Data
Flour Bluff 2010-2019 0.67%
London 2000-2018 7.2%
Northwest No Data
Padre/Mustang Island 2000-2019 2.48%
Southside 2000-2018 2.04%
Westside 2000-2019 0.36%
This information was considered along with the other data discussed to develop a baseline and a
reasonable prediction of projected growth. Growth trends were discussed with City Staff and the CIAC,
who provided input from the builder, developer, engineering, business, and general citizen
communities. Growth rates were adjusted based on the input from the CIC and based on the reviews
and the discussions noted, a growth rate for each ADP was selected with the following rational:
• Bayside is judged to have minimal growth and there is no current indication this growth rate
may increase in the ten-year planning periods. A growth rate of 0.2 percent is used.
• Conditions and growth in Calallen are like those in the Northwest ADP and the same growth
rate of 1.5 percent is used.
• Based on discussions with the CIAC, residential development in the CC Airport ADP may not
occur at an appreciable rate during the planning horizon of this Master Plan and no growth (0.0
percent) is used.
• The Downtown rates have a broad range; however, there is an ongoing effort to encourage
"redevelopment" in the downtown areas, necessitating consideration of a higher growth rate.
A rate of 2.0 percent is used.
• In the Flour Bluff area,the MPO and City growth rate are similar, but there is an increase in
growth occurring recently based on the lot added information.This observation is consistent
with recent development activity in the area. A rate of 1.0 percent is used for this area.
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• For the London area there is currently strong interest in development, the past observed
growth rate as identified by the City is 7.2 percent. After discussions and review with the CIAC,
an annual growth rate of 10.6 percent has been applied in this area.
• The Northwest area has a significant range in the available data. An average growth rate
between the MPO household data and the lot addition data of 1.5 percent is used.
• In the Padre/Mustang Island ADP,the MPO growth rate and the City's growth trend are
consistent.The growth rate in lot count may be minimal due to the type of growth (i.e.,
planned use developments). A growth rate of 2.4 percent is used.
• The Southside area has experienced a higher rate identified by City data than either the MPO
or the added lot count data. Interest in development in this area is strong and a conservative
2.0 percent growth rate has been selected.
• The Westside lot count rate and growth trend identified by the City are consistent. A growth
rate of 0.4 percent was selected for the Westside.
The growth rates developed and considered and the selected growth rates for use as the basis of this
Master Plan are shown in Table 3-5.
Table 3-5 Growth Rates Reviewed and Selected
Annual Annual Annual Lot Historic Selected
ADP Growth in Growth in Addition Growth
Growth Rate
Employees households Growth Rate Rate
Bayside 0.2% 0.3% 0.2% 0.15% 0.2%
Calallen 1.6% 5.3% 1.8% 1.5%
CC Airport 1.9% 3.5% 0.0% 0.0%
Downtown 0.1% 2.6% 0.5% 2.0%
Flour Bluff 0.3% 0.7% 1.4% 0.67% 1.0%
London 5.6% 4.6% 4.6% 7.2% 10.6%
Northwest 1.4% 2.3% 0.6% 1.5%
Padre/Mustang Island 2.6% 2.0% 0.6% 2.48% 2.4%
Southside 1.2% 1.3% 1.0% 2.04% 2.0%
Westside 0.8% 0.8% 0.4% 0.36% 0.4%
Total 0.9% 1.3% 1.8% 1.5%
For commercial development, the growth rates taken from the MPO data are used.Table 3-6 provides
the 2021 and 2031 data for residential and commercial growth used for evaluating future water
demands and proposed Projects to meet current and future needs.
3-5
Table 3-6 Projected 10-Year Commercial and Residental Growth by ADP
ADP 2021 2031 2021 2031
Households Households Employees Employees
Bayside 31,508 32,144 25,887 26,342
Calallen 13,310 1,520 3,502 4,093
CC Airport 1,585 1,582 8,927 10,755
Downtown 3,794 4,625 17,328 17,450
Flour Bluff 8,006 8,844 11,725 12,077
London 11100 3,000 423 732
Northwest 12,152 14,103 11,536 13,307
Padre/Mustang Island 5,987 7,589 2,666 3,431
Southside 41,601 50,711 26,898 30,226
Westside 18,533 19,288 31,253 33,767
Total 129,485 147,886 142,214 155,164
3.3. Land Use
With the annual growth rate for the ADPs selected, the next step is to identify where the anticipated
growth may occur to facilitate planning for future water system expansion. Vacant land that could
develop withing the planning horizon of the master plan is assessed by comparing the anticipated
growth with current land use density and use. For example, residential growth can be assessed in ADPs
by determining the overall density and then using the number of projected new households to calculate
how much undeveloped land may be impacted by the predicted development.As an example, for
residential development, there are 8,006 residences in the Flower Bluff ADP in 2021, the current density
across residential land use types is three units per gross acre.The predicted growth by 2031 in
households is 567, which equates to 189 acres of currently undeveloped or agricultural land being
developed into some type of residential use. Similar evaluations have been conducted in each ADP.
Current land use maps and information from ADPs were used to identify currently vacant and
agricultural areas within the ADPs and future land use mapping based on current land use zoning and
previous master planning efforts have been developed by the City to facilitate practical and efficient
3-6
development.The existing and future land use maps were overlayed to identify currently vacant and
agricultural land that could be developed, and what the anticipated land use for the area would be.
Maps have been prepared for the ADPs identifying currently undeveloped land.The base color of the
vacant lands correlate to the zoned land use (see map legends) and the outline color for parcels
indicates whether the current land use is vacant (orange outline) or agricultural (green outline). Due to
their size, this information is maintained in a shapefile provided to the City.
New lot information provided by the City was then reviewed to assess where potential growth would
occur and to identify overall growth patterns. For a new development outside of the City limits to have
water services, the land must be annexed, and the water collection system extended, so growth outside
of the City is assumed to occur adjacent to existing development within the City Limit or to follow
patterns like current development and then to move outward into the ETJ. Other development factors,
such as properties within the Air Installation Compatible Use Zones (AICUZ) around military air
installation and Accident Potential Zones (APZ) around the Corpus Christin international Airport. Such
zoning and use restrictions were assumed to delay development and limit the land use density in the
associated areas. For developing ten-year projections, development in within areas with land use
restrictions was assumed to remain stagnate and no contributions were included for the ten-year flows.
It should also be noted that areas within defined 100-year flood zones is anticipated to develop
eventually. Based on conversations with the CIAC, development in these areas would be larger lots and
water system needs will be minimal.
3-7
4. WATER FLOWS
4.1. Master Plan methodology
Land use assumptions are used to develop a general prediction of where growth will occur, both in
residential and commercial/ industrial areas, how fast that growth will occur, and the impact predicted
growth patterns will have on the water collection and treatment system. General guidelines have been
developed and presented for use in planning and guiding future expansion of the water system.These
guidelines are not intended to be prescriptive as to exact location and specific route of future
improvements while providing guidance on flows that can be anticipated and how to manage increased
flows due to development.
To complete the master plan, three source documents were used:
• FY 2022-2023 City of Corpus Christi Amended CIP
• Texas Water Development Board Coastal Bend (Region N) Regional Water Planning
Group 2021 Regional Water Plan
• 10-Year Water System Master Plan Recommendations
The City had completed a hydraulic model of their distribution system as part of another project.That
model was used to identify future needs within the City.
4.2. Existing Water Flows
Water demands within the existing City model were not changed.
4.3. Future Flows
Future flows were developed and evaluated for a ten-year planning horizon and an ultimate build-out
condition.These flows are provided in Table 4-1.
Table 4-1.Water Demands
Projected Maximum Treated Water
Year Demand *(MGD)
2021 107
2031 122
2036+ 137
* Does not include future large volume users or new industries.
4-1
5. WATER SYSTEM EVALUATIOI\
The Water System Evaluation was completed by LAN.Their evaluation is included as Appendix A. Key
summary factors for this report are:
• The City hydraulic model for existing conditions did not identify any capacity issues.Therefore,
there are no near term distribution system projects required.
• Short-range (2022-2023) and long range (2026-2027) projects already planned by the City were
included in the model.
• There are two 10-year projects recommended to relieve pressure issues.
5-1
6. COST FACTORS
Proposed projects have been developed to address the identified capacity constraints that currently
exist and that are anticipated based on potential development. To provide a reasonable estimate of
cost for the proposed projects cost factors have been developed that can be applied to proposed work
to develop a budgetary level estimate of project costs. Estimates of cost are high level and are based on
generally accepted construction practices, overall capacity needs, materials, sizes, and depth of various
system components and are not based on a specific design. The cost factors for water system
improvements are included in Appendix A.
6-1
7. CAPITAL IMPROVEMENTS
The capital improvements have been divided into near term, 10-year and ultimate projects. "Near term"
are projects that should be completed or and in the process of being completed prior to 2025. 10-Year
are projects that aren't immediately needed but should be completed for growth in the next ten years.
Ultimate projects are projects defined for the ultimate buildout of the City.Appendix A includes
individual costing sheets for each recommended project.
Although the amount of development that will occur in the next ten years can be predicted, it is difficult
to determine with reasonable accuracy where that growth will occur. Generally, costs were developed
for the current project needs and for the ultimate flow conditions project needs. Ten-year costs were
then developed by taking a percentage of the ultimate project costs based on predicted growth rates.
Based on the breakdown generated using this approach a list of probable ten-year projects has been
developed.
The City currently has significant capital investment planned to preserve and expand accessibility to raw
water. Table 7-1 provides information on projects that have been identified and are currently in
progress or are being developed for Near Term Projects.
Table 7-1 Near Term Improvements
Project Project Year Estimated Cost
No.
1 Choke Canyon Dam Infrastructure Improvements 2022 $1,219,533
2 Wesley Seale Dam(Lake Corpus Christi)Instrumentation Rehabilitation 2022 $5,060,000
3 Wesley Seale Dam Dewatering System and Spillway Gate Rehabilitation 2022 $13,440,000
4 Mary Rhodes Pipeline Phase I Condition Assessment 2024 $3,381,000
5 Mary Rhodes Pipeline Phase I System Improvements 2022 $19,300,000
6 Mary Rhodes Pipeline Phase 11 System Improvements(Bank Erosion) 2022 $14,895,000
8 Nueces River Raw Water Pump Station Transmission Main 2022 $9,350,000
9 Baffle Wall Improvements 2024 $832,000
10 Electrical Distribution Improvements 2023 $1,250,000
11 Electrical Substation 2023 $8,085,000
12 Flocculation Upgrades and Baffling In Basins 1 and 2 2023 $14,500,000
13 Security Upgrade 2023 $2,750,000
14 Sedimentation Basin Improvements 2023 $18,515,730
15 Site Infrastructure Improvements 2023 $4,567,500
2023,
16 Chlorine System Improvements 2031 $54,357,811
Project
Project Year Estimated Cost
No.
17 Recycle Pond Improvements 2023,2025 $4,750,000
10-year improvements are provided in Table 7-2.
Table 7-2 10-Year Improvements
Project Number Project Name Cost Growth%
WATER SOURCES'
LR 2 Reclaimed Water Infrastructure Study $10,000,000 50%
E15117 Seawater Desalination $220,736,326 50%
LR 3 Seawater Desalination(City's Second $275,000,000 50%
Desalination Facility)
WATER TREATMENT2
18131 ONSWTP Clearwell No.3 $17,369,000 24%
19032 ONSWTP Filtration System Hydraulic $20,000,000 24%
Improvements
E17047 ONSWTP Raw Water Influent and $69,300,000 24%
Chemical Facilities Improvements
LR 8 ONSWTP Clearwell No.4 $20,000,000 24%
23059 LR 10 ONSWTP Solids Handling&Disposal $43,700,000 24%
Facility
26003 LR 11 1 ONSWTP Third Treatment Train $96,000,000 24%
23025 LR 12 ONSWTP Weir Improvements Basins 3 $8,847,000 24%
&4
WATER DISTRIBUTION
22144 Flour Bluff 18"Line Extension $8,085,000 100%
21039 Nueces Bay Blvd-Poth Lane Water Line $17,750,000 27%
Replacement'
LR 17 Rand Morgan 16"Water Main $5,775,000 100%
Extension
23033 LR 22 Water Line Extension to Padre Islands $44,310,000 50%
LR 24 Water System Integration Piping for $25,000,000 50%
New Water Plants
'Water Source IFCIP projects include a 50%factor for resilience or redundancy of the existing water
supply and a 50%growth factor.
2 Water Treatment IFCIP projects have a 24%growth factor representing the capacity increase from
161.5 MGD to 200 MGD.
3 Flour Bluff Water Line and Rand Morgan Water Main Extensions are 100%growth, extending service
to new developments.
4The Nueces Bay Boulevard/ Poth Water line is a 27% upsize over existing capacity for service to new
development, and the growth percentage is 27%.
'The Padre Island Extension and New Water Plant Piping represent a 50%growth
percentage and a 50% resilience factor for existing water service.
Beyond the recommended improvements for Year 2031, no additional system deficiencies are
identified requiring water system improvements for the ultimate planning year.
Appendix A.Water Master Plan Technical Report
DRAFT
La. n
Texas Registered Engineering Firm No.2614
Water Master Plan
Technical Report
City of Corpus Christi I Pape-Dawson
Master Planning and Impact Fee Study
INTERIM REVIEW ONLY .. "
Document incomplete: not intended
for permit, bidding, or construction. ;h
Engineers: Lisa K. Lattu, Behnaz Khakbaz
PE License Numbers: 90205, 143075
Firm: Lockwood, Andrews & Newnam, Inc.
Firm Number: F-2614 Ci;; Hit
Date: 12 September 2023
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Table of Contents
1 Purpose.................................................................................................................................................2
1.1 Scope Assumptions.......................................................................................................................2
2 Flow Usage/ Development...................................................................................................................2
2.1 Land Use and Growth Projections Existing Land Use ...................................................................2
2.2 Raw Water Master Plan................................................................................................................3
2.3 Future Treated Water Flows.........................................................................................................3
3 Water Supply Strategies and Evaluations.............................................................................................3
3.1 Water Supply Master Plan............................................................................................................3
4 Existing System Review.........................................................................................................................4
4.1 Model Setup and Assumptions.....................................................................................................4
4.2 Existing System Demands.............................................................................................................4
4.3 Existing System Currently Planned Projects .................................................................................4
4.4 Existing System Evaluation............................................................................................................5
4.5 Existing System Recommended Improvements ...........................................................................5
5 Future System Review...........................................................................................................................6
5.1 Future System Demands...............................................................................................................6
5.2 Modeled O.N. Stevens Water Treatment Plant Production.........................................................6
5.3 Future System Evaluations............................................................................................................6
5.4 TCEQ Capacity Analysis.................................................................................................................8
5.5 Future System Draft Recommended Improvements....................................................................9
6 Water Treatment Plant Asset Evaluation............................................................................................ 10
6.1 Previous Evaluations................................................................................................................... 10
6.2 Evaluation of Current Processes and Projects............................................................................ 10
7 Water Pump Station and Storage Tanks Evaluation........................................................................... 12
8 Water Impact Fee Capital Improvement Plan .................................................................................... 12
8.1 Recommended Near-Term Improvements................................................................................. 12
8.2 Recommended 2031 Improvements.......................................................................................... 12
8.3 Recommended Ultimate Improvements.................................................................................... 13
Appendix A
1 Purpose
The City of Corpus Christi (City) contracted Pape-Dawson Engineers, Inc. (Pape-Dawson) for a Master
Planning and Impact Fee Study. Pape-Dawson contracted with Lockwood, Andrews, and Newnam Inc.
(LAN) for Water and Wastewater Master Plan Support. This technical memorandum summarizes the
Water Master Plan Support including system modeling and Water Impact Fee Capital Improvement Plan
(IFCIP) development for the water system for the 2031 and ultimate planning years.
1.1 Scope Assumptions
• Development of capital improvements associated with new water source(s) is not included in this
technical memorandum.
• Review of water treatment plant and other facilities is based solely on condition and capacity.
• Treatability, bench scale or modeling of water quality performance and water chemistry effects
on the distribution system water quality or impacts were excluded.
• Costs were developed utilizing the City of Corpus Christi Fiscal Year 2023-2024 Proposed Capital
Budget (FY 2023 CIP) and the Texas Water Development Board Coastal Bend Regional Water
Planning Area Region N 2021 Regional Water Plan (2021 Region N Water Plan).
2 Flow Usage / Development
2.1 Land Use and Growth Projections Existing Land Use
Pape-Dawson provided a technical memorandum dated November 2, 2022, titled City of Corpus Christi
Master Plans—Land Use and Population Projections which provides a detailed analysis of future land use
in determining growth.Table 2-1: is the final growth rate by area development plan (ADP).
Table 2-1.Assumed 10-Year Growth by ADP
ADP 2021 2031
Households Households
CC Airport 1,582 1,582
Downtown 3,794 4,625
Flour Bluff 8,006 8,844
Bayside 31,508 32,144
Northwest 12,152 14,103
Southside 41,601 50,711
Westside 18,533 19,288
London 1,100 2,205
Calallen 1,310 1,520
Main System Subtotal 119,586 135,022
Padre/Mustang Island 5,987 7,589
TOTAL 125,573 142,611
City of Corpus Christi
Lockwood,Andrews& Newnam, Inc. Page 2
2.2 Rave Water Master Plan
For this technical memorandum, the City instructed LAN to use the 2021 Region N Water Plan as the
preliminary raw water master plan.The information from that plan is reviewed in the next section,Water
Supply Strategies and Evaluations.
2.3 Future Treated Water Flows
The City completed a review of its elevated storage tanks within the past two years.As part of that effort,
CP&Y, Inc. (CP&Y)1 reported the average daily flow increases from 62 million gallons per day (MGD) in
Year 2011 to 82.5 MGD in year 2025 based on the City's water model.
Due to the influence of water flows on wastewater loads, Pape-Dawson received the City's current and
historical water data to prepare uniform 10-year and ultimate water demands for use with the water and
wastewater plans. LAN received these demands as a shapefile with the demands allocated to parcels with
planned growth.
3 Water Supply Strategies and Evaluations
3.1 Water Supply Master Flan
Upon the City's direction, LAN reviewed the 2021 Region N Water Plan to prepare the preliminary raw
water master plan.While the 2026 Region N Water Plan is in preparation by the Regional Water Planning
Group,there were no demand or water management strategy updates available for use during the Water
Master Plan Development.
3.1.7 dater Supply Strategies
The 2021 Region N Water Plan includes potential water supply or water management strategies over a
50-year horizon. The IFCIP considers only those improvements through the Year 2031, so the water
management strategies from the 2021 Region N Water Plan beyond 2031 are excluded.
The City is included as a potential sponsor for the six projects listed below.
• O.N.Stevens Water Treatment Plant Improvements:The City is completing an O.N.Stevens Water
Treatment Plant (ONSWTP) master plan with a current list of improvements. LAN reviewed the
improvements listed in the 2021 Region N Water Plan,but the City's master plan updates provided
the projects utilized in this technical memorandum.
• Municipal Conservation: Municipal Conservation is considered as a water demand strategy but is
not included as water supply in the IFCIP.
• Aquifer Storage and Recovery: The Aquifer Storage and Recovery (ASR) project is included in
Appendix A for reference, but not included in the IFCIP.The Regional Planning Group and the City
are evaluating this project as part of the 2027 update to the Region N Water Plan.
• Inner Harbor and La Quinta Desalination: The City has two desalination projects under
consideration for future water supply. These projects update and replace the 2021 Region N
Water Plan desalination projects.
1 CP&Y, Inc. is now doing business as STV Group, Inc.(STV)
Lockwood,Andrews& Newnam, Inc. Page 1 3
• Evangeline/Laguna Treated Groundwater Project:The Evangeline/Laguna Treated Groundwater
project is included in Appendix A for reference.The project is included in the 2021 Region N Water
Plan as a joint project between the City and the San Patricio Municipal Water District, though it
has not been fully vetted or adopted by the City and is under review as part of the 2027 update
to the Region N Water Plan.
4 Existing System Review
4.1 (Model Setup and Assumptions
The City's existing InfoWater Pro hydraulic model (October 2022) was used as the basis for this analysis
and provided by CP&Y2. Corpus Christi Water(CCW)requested a model update to include projects already
in planning,design, or construction and additional water system improvement projects identified to serve
future known developments. Proposed water system improvements were reviewed or developed to meet
existing and projected demands with a minimum system pressure of 35 psi.
4.2 Existing System Demands
The existing hydraulic model included three steady-state scenarios representing existing Average Day
Demand (ADD), Maximum Day Demand (MDD), and Peak Hour Demand (PHD) conditions. Table 4-1 lists
the existing system demands.
Table 4-1: Existing System Demands
Demand Condition GPM MGD Peaking Factor*
ADD 59,046 85 1
M DD 74,398 107 1.26
PHD 1 83,325 120 1.41
*Peaking Factor=Demand/ADD
4.3 Existing System Currently Planned Projects
The existing water system model update by STV included projects completed within the last five(5)years.
Additional project information was provided by the City for analysis of projects currently planned or in
early design stages.
The City has a Pipe Reinvestment Program to replace pipes at the end of their useful life or adversely
affected by the new elevated storage tanks. There were no recent reports or project information for the
Pipe Reinvestment Program available for review;those projects are included as budgetary estimates from
the Fiscal Year 2023-2024 Proposed Capital Budget.
z CP&Y, Inc. is now doing business as STV Group, Inc.(STV)
Lockwood,Andrews& Newnam, Inc. Page 1 4
Specifically Referenced Projects
The following were identified in the scope as currently planned projects subject for review and possible
inclusion in the water model.The status of the review is addressed for each project.
• Citywide Water Distribution System Indefinite Delivery/Indefinite Quantity Program: This was a
separate study not available for independent review but included as projects identified by CCW.
• San Patricio Municipal Water District Transmission Main Connection: This project is in service.
• Yorktown Boulevard Water Line Extension: This project is in service.
• Water Line Replacement Program: This was a separate study not available for independent
review but included as projects identified by CCW.
• Elevated Water Storage Tanks—Citywide: This was a separate study not available for independent
review but included as projects identified by CCW.
-ting Syste Vater Treatment Capacit
ONSWTP staff confirmed the plant's current capability to treat 161.5 MGD and projects identified in the
ongoing plant master plan expands the treatment capacity to 200 MGD.
4.4 Existing System Evaluation
The existing system was analyzed for improvements needed to address present-day system issues. For
this analysis, LAN used the PHD scenario in the existing hydraulic model to represent the worst-case
scenario.LAN conducted a steady-state PHD analysis to identify possible capacity issues within the existing
system. Analysis of the existing system results indicated that except for locations in the vicinity of ESTs or
upstream of pump stations,the minimum pressure at all other locations was above 35 psi,satisfying Texas
Commission on Environmental Quality(TCEQ) requirements.
4.4. 1 Model Limitations and Recommendation;
The limitations encountered by LAN during this project were:
• Lack of demand diurnal patterns in the received model, as all scenarios were steady-state.
• The existing system hydraulic model was not calibrated.
Due to a lack of demand diurnal patterns, LAN did not evaluate the system storage variation for
operational efficiency. A criterion for maximum pipe velocity was not available and should be evaluated
with the City's model when available. Fire flow analysis was not addressed since it was not within the IFCIP
scope of work.
To address these limitations, LAN recommends re-evaluating future projects once the existing system
model is calibrated, and the elevated storage tank study is complete.
4.5 Existing System Recommended Improvements
Since the existing system evaluation did not identify any hydraulic capacity issues, no near-term capital
improvement projects are recommended for the City's existing system.
Lockwood,Andrews& Newnam, Inc. Page 1 5
S Future System Review
5.1 Future System Demands
For uniformity between the water and wastewater plans, Pape-Dawson distributed the demands to future
parcels with planned growth for the 2031 and Ultimate planning years.That information was shared with
LAN as a GIS shapefile which was imported into the City's model maintained by STV.
An estimate of unaccounted-for water (UFW) of 6% was assumed to estimate leakage within the City's
water system. InfoWater Pro's Allocation Manager was used to allocate future demands to model nodes
following the closest pipe/closest junction rule.The Year 2031 and Ultimate System Average Day Demands
(ADD), Maximum Day Demands (MDD), and Peak Hour Demands (PHD) are included in Table 5-1 below.
Table 5-1: Existing and Future System Demands
Existing Demand 2031 UFW Z Ultimate
Demand Demand Peaking Growth Demand Demand
Condition Factor'
GPM MGD GPM MGD GPM MGD GPM MGD GPM MGD
ADD 59,046 85 1 4,518 6.5 63,564 92 3,814 5.5 67,378 97
MDD 74,398 107 1.26 5,692 8.2 80,090 115 4,805 6.9 84,896 122
PHD 83,325 120 1.41 6,370 9.2 89,695 129 5,382 7.7 95,077 137
'Peaking Factor=Demand/ADD
ZUFW assumed as 6%
5.2 Modeled O.N. Stevens Water Treatment Plant Production
As part of the modeling effort, the water supply needed from the O.N. Stevens Water Treatment Plant
(ONSWTP)was evaluated. Based on information from CCW staff,ONSWTP currently treats up to 110 MGD.
This confirms the existing demand in the 2022 model of 107 MGD.
An additional 19 MGD regular pump capacity will be needed for a new maximum day demand of 129 MGD
for projected 2031 system demands. An additional 27 MGD regular pumping capacity is needed meet the
ultimate maximum day demand of 137 MGD. The increased production amounts are possible with the
existing ONSWTP capacity of 161.5 MGD.
5.3 Future System Evaluations
PHD scenarios were developed as the worst-case scenario to identify future IFCIPs. Projects that are
currently in various stages of design and construction were provided by the City and implemented into
the model. Table 5-2 lists the City's short-range (2022 to 2025) and long-range (2026 to 2027) projects
that were incorporated into the future system models for the 2031 and ultimate planning years.
Lockwood,Andrews& Newnam, Inc. Page 1 6
Table 5-2: Fiscal Year 2022-2023 Projects Incorporated in Future Hydraulic Models
Timeline CIP# Name Description
Short- Flour Bluff 18" Line Existing 18" main extended approximately 14,500 LF
Range 22144 Extension and connected to a larger transmission main that
FY 2022- runs along Flour Bluff Drive
2025 Leopard St& Up Removal of 32,000 LF of 30" CIP pipe and
21038 River Water Line replacement with new 24" FPVC pipe
Replacement
Nueces Bay Blvd & Replacement of 9,000 LF of existing 16" CIP water
line along W Broadway St and Nueces Bay Blvd, and
line
21039 Lane-Water 5,000 LF of existing 16" CIP water line along Poth
line Lane with 18" PVC pipe
Packery Channel Building a new water transmission line along State
20100 Hwy 361 to provide redundant and reliable water
Water Line supply to NCWID#4
Port Avenue Water Replacement of 7,540 LF of existing 16" CIP pipe
19038 Line Replacement along Port Ave from Horne Rd to Guadalupe St with
16" PVC pipe
18156 Ship Channel Water Replacing the existing two 16" water lines that cross
Line Relocation the Ship Channel at Avery Point with a 24" steel pipe
Water Line
Connecting a 42" water line on Whitley across
23033 Extension to Padre Laguna Madre to Coral Vines EST with a 24" pipe
Island
FY 22: Modifications to Holly and Rand Morgan ESTs.
Installation of pressure relief valves (PRVs)
Elevated Water FY 24: Completion of new EST in Flour Bluff on
E16290 Storage Tanks- Division Road.
Citywide FY 25: Completion of new EST on Nueces Bay
Boulevard. Demolish old EST at Flour Bluff on Division
Road, and old EST on Morgan
Long- Rand Morgan 16" Adding an interconnection of 16" transmission main
Range LR-13 Water Main along Rand Morgan Rd from Agnes St to McNorton
FY 2025-
Extension Rd.
2026
Based on the received hydraulic model, the location and capacity of the two new ESTs were assumed as
listed in Table 5-3.
Table 5-3: New ESTs Properties
Name Capacity(MG) Location
New Flour Bluff EST 3.0 Division Rd, west of Flour Bluff Dr.
New Nueces Bay Blvd EST 1.25 Near the intersection of Nueces Bay Blvd and Hulbirt
St.
Lockwood,Andrews& Newnam, Inc. Page 1 7
5.4 TCEQ Capacity Analysis
An evaluation of the City's system was performed to determine if the system met the Texas Commission
on Environmental Quality's(TCEQs)minimum pumpage and storage requirements as outlined in Chapter
§290.45 of the Texas Administrative Code. A summary of the applicable TCEQ minimum requirements is
included below. TCEQs requirements are based on the raw number of connections, which have been
approximated as the number of households in each of the city's pressure planes.
u CEQ Minimum Requirements.
• Elevated Storage Capacity: Elevated storage capacity of 100 gallons per connection.
• Elevated Storage Credit: If an elevated storage capacity of 200 gallons per connection is
provided, reduced service pumping requirements can be applied as discussed below.
• Pressure Tank Capacity: For future systems, if elevated storage is not provided, a pressure
tank capacity of 20 gallons per connection is required.
• Total Storage Capacity(elevated and ground storage):Total storage capacity of 200 gallons
per connection, inclusive of the 100-gallon minimum requirement listed above.
• Service Pump Capacity:A minimum of two(2) pumps with a combined capacity of 2.0 GPM
per connection or a total capacity of at least 1,000 gpm and the ability to meet peak hourly
demands with the largest pump out of service, whichever is less. For systems that meet
the elevated storage credit requirement listed above, a minimum of two (2) pumps with a
combined capacity of 0.6 GPM per connection are required for each pump station or
pressure plane.
The City's existing system is divided into two(2)pressure planes—Main and Padre Island.The 2031 system
meets all TCEQ capacity requirements except for the elevated storage capacity in the Main Pressure Plane.
Results are summarized in Tables 5-4 and 5-5.
Table 5-4: 2031 TCEQ Capacity Analysis for Main Pressure Plane
Main Pressure Plane Evaluation
TCEQ Requirements System Check
Elevated Storage 100 gal/conn 13,502,200 10,000,000 DOESN'T MEET TCEQ
Capacity [gal] REQUIREMENTS'
Elevated Storage Credit 200 gal/conn 27,004,400 10,000,000 DOESN'T QUALIFY
[gal] FOR PUMPING CREDIT
Total Storage Capacity 200 gal/conn 27,004,400 37,500,000 MEETS TCEQ REQUIREMENTS
[gal]
Service Pump Capacity 2 gpm/conn 101,088 159,924 MEETS TCEQ REQUIREMENTS
[gpm]
'Options for bringing additional elevated storage on-line or pursuing an Alternative Capacity Requirement(ACR)are
part of the separate elevated storage project and report.
Lockwood,Andrews& Newnam, Inc. Page 1 8
Table 5-5: 2031 TCEQ Capacity Analysis for Padre Island Pressure Plane
Padre Island Pressure Plane Evaluation
TCEQ Requirements System Check
Elevated Storage 100 gal/conn 758,900 1,500,000 MEETS TCEQ REQUIREMENTS
Capacity [gal]
Elevated Storage Credit 200 gal/conn 1,517 800 1,500,000 DOESN'T QUALIFY
[gal] FOR PUMPING CREDIT
Total Storage Capacity 200 gal/conn 1,517,800 2,650,000 MEETS TCEQ REQUIREMENTS
[gal]
ttt
Pump Capacity 2 gpm/conn 5,565 8,000 MEETS TCEQ REQUIREMENTS
[GPM]
5.5 Future System Draft Recommended Improvements
Draft projects for Year 2031 are listed in Table 5-6. No additional projects were required to meet system
demands or pressures for the Ultimate scenario in the Main System.
Table 5-6: LAN's Recommended Projects for Year 2031
Description Note
Replace 8,600 LF of 16" ACP pipe with 16" Prevents low pressures along State Hwy 361 near
PVC pipe along State Hwy 361 Frontside Dr
Upsize 1,670 LF of 2" to 6" pipe south of
Improve minimum pressure along this pipeline
Saratoga Blvd and west of Chapman Ranch Rd
Model Limitations and Recommendations
The limitations encountered by LAN for future model scenarios are detailed in Section 4.4.
To address these limitations, LAN recommends re-evaluating future projects once the existing system
model is calibrated, and the elevated storage tank study is complete.
I ondon and CnInIlen Recommended Yeah 2031 Imorovernents
Additional 2031 demands were developed by Pape-Dawson for the high-growth London and Calallen
ADPs. LAN incorporated those demands into the Year 2031 model scenario and recommended additional
projects to create a framework for development.
_3.3.3 �_QJJILQu uu1ijJuUvcuiicuILJAUvu.yeyuy �_LAiHiHLLt
After review by the Capital Improvement Advisory Committee (CIAC) on June 22, 2023, projects ineligible
for impact fees were eliminated from the recommendations. Projects outside the City's Certificate of
Convenience and Necessity(CCN)boundary and water lines smaller than 12-inches were removed, leaving
only the CCW planned CIP.
Lockwood,Andrews& Newnam, Inc. Page 19
6 Water Treatment Plant Asset Evaluation
This technical memorandum does not include or address water quality performance, or water chemistry,
or impacts and/or effects to the distribution or transmission system.
Per Pape-Dawson's scope with the City, the O.N. Stevens Surface Water Treatment Plant (ONSWTP)
conditions/capacity assessment included the following objectives:
• Review of previous evaluations prepared within the last five years. Using information provided by
the City, to determine which recommendations from the previous evaluations have been
implemented and which remain. Using this existing information,evaluate if existing facilities have
the capacity to meet projected 5-year and 10-year flow demands and provide a list of
recommended improvements to meet flow demands,focusing only on high-level unit processes.
• Visit water treatment plant site and observe major unit processes. Meet with water treatment
plant staff to confirm/clarify observations and discuss history of plant operations and
maintenance concerns.
• Evaluate the current projects identified in the City's Capital Improvement Plan to determine the
portion associated with maintenance-related versus growth-related costs.
LAN's scope for the ONSWTP Asset Evaluation is in line with the Pape-Dawson scope with the City in that:
• Review of the water treatment plant is based solely on condition and capacity.
• This assessment does not include any water quality evaluations in accordance with the United
States Environmental Protection Act (US EPA) or (TCEQ) Safe Drinking Water Act compliance.
• Any treatability, bench scale or modeling of water quality performance or any water chemistry
effects on the distribution system water quality or impacts is excluded from this evaluation.
6.1 Previous Evaluations
LAN received no previous reports or evaluations for ONSWTP.
Beyond the information provided in the City's Capital Improvement Plans, a site plan map of the ONSWTP
master plan and brief phone or email communications, LAN was only able to address facility conditions
and operational concerns raised by staff during the site visit.
6.2 Evaluation of Current Processes and Projects
LAN performed a site visit October 11, 2021. The site visit involved a guided tour of the facility focused
only on high-level unit processes and did not include an in-depth inspection of specific equipment to
evaluate treatment performance or condition.
LAN had a follow-up staff tele/video meeting with ONSWTP Staff April 20, 2023. The follow-up staff
meeting involved a review and discussion of ongoing and future projects.
After reviewing observations, plant maintenance history and any operational concerns LAN confirmed
that the ongoing ONSWTP master plan had incorporated staff concerns with the facility or operations.
Capacity Discussions with Staff confirmed that the existing facility could treat 161.5 MGD and that
ONSWTP master plan would increase that capacity to 200 MGD. While individual projects may increase
individual process capacities, the facility total capacity will not increase beyond 161.5 MGD until all
process improvements are in place.
Lockwood,Andrews& Newnam, Inc. Page 1 10
Specifically Referenced Projects
The following were identified in the scope as currently planned projects subject for review in the water
master plan.The status or project details are addressed for each project below.
• ONSWTP High Service Building No. 3: Project is complete.
• ONSWTP Raw Water Influent and Chemical Facilities Improvements: Project E17047 will address
existing hydraulic constraints and upgrade chemical feed systems.The scope involves eliminating
hydraulic constrictions in the front-end piping, modernizing chemical storage and chemical feed
systems to optimize dosage, reliability, monitoring, and control of water treatment chemicals.
This is a continuation of projects 180415 and 180156 . The project was scheduled to advertise in
2023 with construction to begin in late 2026 or early 2027.
• ONSWTP On-Site Hypochlorite Generation: Projects 21104 and LR 7 consist of replacing the
existing, aging chlorine gas system with a safer, more reliable on-site hypochlorite generation
system. This will eliminate the health and life risk of exposure to chlorine gas for ONSWTP staff
and the surrounding community. Modifications to the existing chlorine dioxide system are also
included in this project's scope. Design should be complete and out for bids in the fall.The chlorine
system will treat 200 MGD.
• ONSWTP Solids Handling and Disposal Facilities: Projects 23059 and LR10 address the design and
construction of a new solids handling facility at ONSWTP. ONSWTP uses conventional water
treatment processes (coagulation, flocculation, sedimentation,filtration)for removal of turbidity
and naturally occurring organic matter. The combination of these processes generates a solids
waste stream that is stored using three (3) on-site and four (4) off-site lagoons. Once filled, the
on-site lagoons require the City to hire a 3rd party contractor to remove accumulated solids,
dewater and haul to the landfill. Further, the initial solids storage permit allowed for permit
renewals of off-site lagoon storage only until 2026. It is essential that a new solids handling facility
be built at ONSWTP as a long-term solution to manage solids.
• ONSWTP Site Infrastructure Improvements: Project E13051 incorporates ongoing operational
improvements and/or emergency repair. Improvements include but are not limited to: filter-to-
drain sluice gate replacement, filter-to-drain butterfly valves replacement, filter-to-waste
butterfly valves replacement, facilitates structural repairs, cable tray foundation repairs and
storm water drainage repairs and improvements. There is no projected operational impact with
this project, but a reassessment will be done upon completion of the project design to determine
ongoing or maintenance costs.
• ONSWTP Sedimentation Basin Improvements: Project 18130 addresses the existing Trac-Vac
solids collector system at ONSWTP Plant 1 primary sedimentation basin. The existing system is
obsolete and has exceeded its useful design life. The current system requires substantial
corrective maintenance and has failed often, resulting in inefficient/ineffective solids removal
from the basins which impacts the ability to reliably treat water.The scope of this project includes
conducting a preliminary design to determine alternatives and best option for replacing the
existing system, developing detailed design and construction documents, and providing
construction phase services.A one-time removal and disposal of accumulated sludge and existing
vegetation in the ONSWTP presedimentation basin is also included. The rebid for the
presedimentation dredging is ongoing.
Lockwood,Andrews& Newnam, Inc. Page 1 11
• ONSWTP Clearwell No. 3: Project 18131 will be built to meet the requirements of treatment
capacity and operations. Clearwell 1, originally constructed in 1954, has exceeded its design
lifespan and sustained severe deterioration. With a capacity of 4 MG, Clearwell 1 can no longer
meet TCEQ requirements of providing a minimum clearwell storage capacity. The other existing
clearwell,Clearwell No.2 has a capacity of 10 MG and remains in good condition and is functioning
as intended. There is no projected operational impact with this project, but a reassessment will
be done upon completion of the project design to determine ongoing or maintenance costs.This
project has been awarded and is expected to be completed in 2025.
• ONSWTP Filtration System Hydraulic Improvements: Project 19032 will upgrade the filtration
system components and equipment that has reached its end of service life. The project will also
address post-filtration hydraulic bottlenecks which will assist ONSWTP in meeting future capacity
requirements of 200 MGD, an increase over the current capacity of 161.5 MGD. Planned
improvements will include but are not limited to upgrades to filtration system piping, the
replacement of filter gates, valves, and actuators, and filtration system effluent piping and
channel hydraulic improvements.There is no projected operational impact with this project, but
a reassessment will be done upon completion of the project design to determine ongoing or
maintenance costs.This project is currently under design.
7 Water Pump Station and Storage Tanks Evaluation
No previous evaluations were received or reviewed including the ongoing elevated storage report which
was not complete at the time of the Master Plan.
Operations staff indicated that other than the ongoing elevated storage update no deficiencies were
noted or observed in regular or critical operations.
8 Water Impact Fee Capital Improvement Plan
8.1 Recommended Dear-Term Improvements
There is a separate ongoing elevated storage report and associated ACR that may have Near Term
Improvements identified for TCEQ compliance. No other near-term or existing system deficiencies are
identified in this technical memorandum.
8.2 Recommended 2031 Improvements
The Recommended 2031 Improvements with a growth component, eligible for impact fee analysis are
included in Table 8-1.
The complete Proposed Capital Improvement Plan Project Sheets, Proposed Capital Improvement Plan
Exhibits, and 2021 Regional Plan Project Information Sheets are included as Appendix A.
Lockwood,Andrews& Newnam, Inc. Page 1 12
Table 8-1: Recommended Growth Projects through Year 2031
Project Number Project Name Planning Cost Growth%
WATER SOURCES'
LR 2 Reclaimed Water Infrastructure Study $10,000,000 50%
E15117 Seawater Desalination $220,736,326 50%
LR 3 Seawater Desalination (City's Second $275,000,000 50%
Desalination Facility)
WATER TREATMENT
18131 ONSWTP Clearwell No. 3 $17,369,000 24%
19032 ONSWTP Filtration System Hydraulic $20,000,000 24%
Improvements
E17047 ONSWTP Raw Water Influent and $69,300,000 24%
Chemical Facilities Improvements
LR 8 ONSWTP Clearwell No. 4 $20,000,000 24%
ONSWTP Solids Handling& Disposal o
23059 LR 10 $43,700,000 24/
Facility
26003 LR 11 ONSWTP Third Treatment Train $96,000,000 24%
23025 LR 12 ONSWTP Weir Improvements Basins 3 $8,847,000 24%
WATER DISTRIBUTION
22144 Flour Bluff 18" Line Extension $8,085,000 100%
21039 Nueces Bay Blvd - Poth Lane Water Line $17,750,000 27%
Replacement'
LR 17 Rand Morgan 16" Water Main $5,775,000 100%
Extension
23033 LR 22 Water Line Extension to Padre Islands $44,310,000 50%
LR 24 Water System Integration Piping for $25,000,000 50%
New Water Plants
' Water Source IFCIP projects include a 50% factor for resilience or redundancy of the existing
water supply and a 50%growth factor.
2 Water Treatment IFCIP projects have a 24% growth factor representing the capacity increase
from 161.5 MGD to 200 MGD.
3 Flour Bluff Water Line and Rand Morgan Water Main Extensions are 100%growth, extending
service to new developments.
'The Nueces Bay Boulevard / Poth Water line is a 27% upsize over existing capacity for service
to new development, and the growth percentage is 27%.
'The Padre Island Extension and New Water Plant Piping represent a 50% growth percentage
and a 50%resilience factor for existing water service.
8.3 Recommended Ultimate improvements
Beyond the recommended improvements for Year 2031, no additional system deficiencies are identified
requiring water system improvements for the ultimate planning year.
Lockwood,Andrews& Newnam, Inc. Page 1 13
Appendix A
A-1 Proposed Capital Improvement Plan Project Sheets
A-Z Proposed Capital Improvement Plan Exhibits
A-3 2021 Regional Plan Project Information
A-1 Proposed Capital Improvement Plan Project Sheets
City of Corpus ...
L:t Number act Name 10-Year Planning Percen
c Cost Growth
WATER SOURCES
E13050 LR 1 Choke Canyon Dam Infrastructure Improvements $5,500,000 0%
LR 2 Reclaimed Water Infrastructure Study $10,000,000 50
E15117 Seawater Desalination $220,736,326 50%
LR 3 Seawater Desalination(City's Second Desalination Facility) $275,000,000 50
20258 Wesley Seale Dam Instrumentation Rehabilitation $3,675,000 0%
22023 LR 4 Wesley Seale Dam Dewatering System and Spillway Gate Rehabilitation $42,900,000 0
LR 5 Wesley Seale Dam Infrastructure Improvements $20,000,000 0
WATER SOURCES PROJECT TOTAL: $577,811,326 --
WATER SUPPLY LINES
23027 Mary Rhodes I Condition Assessment $1,231,000 0
E13037 Mary Rhodes I System Improvements $12,750,000 0%
19025 Mary Rhodes II System Improvements(Bank Erosion) $14,271,000 0
E16417 Nueces River Raw Water Pump Station Transmission Main $330,000 0
LR 6 Mary Rhodes I Pump Station Upgrades $27,300,000 0
WATER SUPPLY LINES PROJECT TOTAL: $55,882,000 --
WATERTREATMENT
21104 LR 7 ONSWTP Chlorine System Improvements $82,700,000 0%
18131 ONSWTP Clearwell No.3 $17,369,000 24%
21030 ONSWTP Electrical Generation&Distribution Improvements $15,975,000 0%
23024 ONSWTP Electrical Reliability Upgrades $8,085,000 0%
19032 ONSWTP Filtration System Hydraulic Improvements $20,000,000 24%
22407 ONSWTP Flocculation Upgrades and Baffling in Basins 1,2 $17,000,000 0%
22406 ONSWTP Fluoride System Improvements $2,420,000 0%
22405 ONSWTP Navigation Pump Station Improvements $10,500,000 0%
E17047 ONSWTP Raw Water Influent and Chemical Facilities Improvements $69,300,000 24
22406 ONSWTP Recycle Pond Improvements $4,200,000 0%
LR 8 ONSWTP Clearwell No.4 $20,000,000 24%
22408 LR 9 ONSWTP Security Upgrade $8,150,000 0
18130 ONSWTP Sedimentation Basin Improvements $14,145,000 0%
E13051 ONSWTP Site Infrastructure Improvements $4,050,000 0%
23059 1 LR 10 JONSWTP Solids Handling&Disposal Facility $43,700,000 24
26003 1 LR 11 JONSWTP Third Treatment Train $96,000,000 24
23025 1 LR 12 JONSWTP Weir Improvements Basins 3&4 $8,847,000 24
WATER TREATMENT PROJECT TOTAL: $442,441,000 --
WATER DISTRIBUTION LINES
23061 16"Water Main Extension-Hwy 286 to Alameda $6,960,000 0%
18154/23064 LR 13 Citywide Large-Size Water Line Cathodic Protection System $9,163,000 0
19037 123065 123107 LR 14 Citywide Water Line Repair/Replacement(Large Diameter) $115,955,655 0%
19010 123073 123108 LR 15 Citywide Water Line Repair/Replacement(Small Diameter) $100,600,000 0%
E16290/20267 LR 16 Elevated Water Storage Tanks-Citywide $53,870,000 0
24020 E.Navigation Blvd Water Line Replacement $12,100,000 0%
22144 Flour Bluff 18"Line Extension $8,085,000 100%
21038 Leopard Street&Up River Road Water Line Replacement $17,840,000 0
21039 Nueces Bay Blvd-Poth Lane Water Line Replacement $17,750,000 27
23021 Sand Dollar Connection Line 16"(Coral Vine) $13,260,000 0%
20101 SH286 Water Line Replacement $11,569,000 0
24027 SH358 Water Line Relocation $1,375,000 0%
18156 Ship Channel Water Line Relocation $5,959,787 0
21041 South Side Water Transmission Main Cathodic Protection Improvements $3,300,000 0%
LR 17 Rand Morgan 16"Water Main Extension $5,775,000 100%
LR 18 Relocation of Water Transmission Line at Corpus Christi Airport $20,000,000 0
LR 19 South Side Transmission Main Line Constraint $7,000,000 0
23060 LR 20 South Side Transmission Grid Completion $51,980,000 0
24021 Up River Rd Water Line Replacement $8,840,000 0%
LR 21 Water Line Crossing Replacement-SPID,Hwy 286,US-37 $12,000,000 0%
23033 LR 22 Water Line Extension to Padre Island $44,310,000 50
23068 Water Street Line Improvements $6,385,500 0%
LR 23 Water Line Replacement-N.Chaparral&Mesquite Street $15,000,000 0
LR 24 Water System Integration Piping for New Water Plant $25,000,000 50
LR 25 Weber Rd.Water Line Replacement $17,000,000 0
LR 26 West Broadway Street Water Line Replacement $12,000,000 0
WATER DISTRIBUTION LINES PROJECT TOTAL: $603,077,942 --
WATER FACILITIES AND OTHER
23026 Corpus Christi Water Parking Lot Improvements $250,000 0
23080 Corpus Christi Water Warehouse $12,000,000 0%
24001 Open Storage Yard(CC Water) $3,925,000 0
23029 Sunrise Beach Facility Improvements $1,760,000 0%
23051 Warehouse Facility from Ground Storage Tank $3,093,000 0%
24110 Wash Rack Water Utilities $1,396,000 0
21116 Westley Seale Boat and Ramp Pier-(Sunrise Beach) $1,100,000 0%
LR 27 lWater Meter Capital Replacement Program $30,000,000 0%
LR 28 lWater Utility Support-Streets projects $106,236,279 0
WATER FACILITIES AND OTHER PROJECT TOTAL: $159,760,279 --
WATER PROJECT TOTAL: $1,838,972,547 --
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# E13050
Project Name Choke Canyon Dam Infrastructure Improvements
Type hnprovement/Additions Department Water Department
Useful Life 40 years Contact Director of Water Utilities
Category Water Supply Priority Critical-Asset Condition/longevity
Council District Outside City Limits
Status Active
Description
Choke Canyon Dam is located in South Texas on the Frio River,four miles west of Three Rivers,Texas,and approximately 90 miles northwest of
Corpus Christi. The reservoir supplies water for municipal and industrial needs and provides recreational and environmental benefits. This
project provides for various repairs and improvements identified by City and Bureau of Reclamation including,but not limited to crane repairs,
soil erosion control,electrical system repairs,spillway operator motor brake repair,emergency spillway and low flow outlet controls,
instrumentation repairs life safety improvements and other miscellaneous improvements required to maintain the 40-year-old structure and to
comply with federal statutes.
Justification
This project will ensure the normal operation and increase service life of structure.
Expenditures FY 2023-2024 to FY 2032-2033
Construction/Rehab
Design
Eng Admin Reimbursements -
Long-Range Costs 5,500,000
Total 5,500,000
Funding Sources FY 2023-2024 to FY 2032-2033
Grant-American Rescue Act
Revenue Bonds -
TBD 5,500,000
Total 5,500,000
Budget Impact/Other
An assessment will be done upon completion of project to determine maintenance costs. This project is anticipated to save maintenance and
operations costs by avoiding repeated spot repairs and emergency repairs.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# LR 2 SEQ LR 2
Project Name Reclaimed Water Infrastucture Study
Type Study Department Water Department
Useful Life 15 years Contact Director of Water Utilities
Category Water Supply Priority Critical-Asset Condition/longevity
Council District All
Status Long-Range
Description
The objective of this project is to develop a reclaimed water infrastructure plan. The plan will include the outline of the distribution network needed
within the City for both commercial and institutional customers.
Justification
Expenditures FY 2023-2024 to FY 2032-2033
Long-Range Cost 10,000,000
Total 10,000,000
Funding Sources FY 2023-2024 to FY 2032-2033
TBD 10,000,000
Total 10,000,000
Budget Impact/Other
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# E15117
Project Name Seawater Desalination
Type Improvement/Additions Department Water Department
Useful Life 40 years Contact Director of Water Utilities
Category Water Supply Priority Needed-Deficient Services
Council District 1
Status Active
Description
The City's Inner Harbor seawater desalination project consists of the technical feasibility,plant site selection,conceptual life-cycle delivery cost,
regulatory and permitting criteria,procurement methodology,and design and construction of a 20 million gallon a day(MGD)and expandable to
30 MGD municipal seawater desalination facility in Nueces County.
On April 2020,the City Council approved the submission of an application for a low interest loan from the State for the design and construction for
the Inner Harbor seawater desalination facility.Funding was approved in July 2020 and in August 2020 City Council approved the draw of funds
for design,RFQ,RFP,land,permits,environmental,legal,power,contingency,and extension of owner's representative agreement for the Inner
Harbor facility.In October 2022,the City was granted the Water Rights permit for the Inner Harbor facility by the Texas Commission on
Environmental Quality(TCEQ).Land Acquisition,TPDES permit,and U.S.Army Corps permitting are underway.
Justification
Following the 2011-2013 drought of record,the City of Corpus Christi decided to pursue seawater desalination as a new drought-proof water
supply for the region. The City is the regional water supplier for commercial,residential,and industrial water needs,serving directly or indirectly
approximately 500,000 people across the Coastal Bend.In 2018 the City Council approved a"trigger point"which states that when the region's
water supply demands exceed 75%of the firm yield,(the amount of water the City can guarantee during the worst drought of record)the City will
need to add a new water supply.Following City Council approval in 2020,the City submitted permit applications for the seawater desalination
project.
Expenditures FY 2023-2024 to FY 2032-2033
Planning 2,521,326
Land Acquisition 5,525,000
Construction/Rehab 188,570,000
Design 21,000,000
Eng Admin Reimbursements 3,120,000
Long-Range Costs -
Total 220,736,326
Funding Sources FY 2023-2024 to FY 2032-2033
State Water Implementation Fund Texas Loan-2020 9,686,326
State Water Implementation Fund Texas Loan-Future 211,050,000
TBD -
Total 220,736,326
Budget Impact/Other
Maintenance and operational costs will increase,but corresponding revenues will increase with additional water consumption. The City is also
seeking additional grant funding from State and Federal agencies to supplement this project.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# LR 3 SEQ LR 3
Project Name Seawater Desalination(City's Second Desalination Facility)
Type Improvement/Additions Department Water Department
Useful Life 40 years Contact Director of Water Utilities
Category Water Supply Priority Needed-Deficient Services
Council District All
Status Long-Range
Description
This project is to design and construct the City's second desalination facility.
Justification
Expenditures FY 2023-2024 to FY 2032-2033
Long-Range Cost 275,000,000
Total 275,000,000
Funding Sources FY 2023-2024 to FY 2032-2033
TBD 275,000,000
Total 275,000,000
Budget Impact/Other
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# 20258
Project Name Wesley Seale Dam Instrumentation Rehabilitation
Type Improvement/Additions Department Water Department
Useful Life 25 years Contact Director of Water Utilities ti
Category Water Supply Priority Critical-Asset Condition/longevity
Council District Outside City Limits
Status Active
Description
This project provides for improvements to original instrumentation system including integration with O.N. Stevens WTP process controls in
response to previous inspection and priority investment recommendations into the system. This project will protect integrity of Wesley Seale Dam
system(1957),to provide for proper inspection and updated regulatory reports per TCEQ and preserve a steady flow of dam stability data over time
to better inform future maintenance and repair decisions.
Justification
This project will improve reliability,comply with state requirements for high hazard dam owners,and reduce costs. This project is required by
TCEQ.
Expenditures FY 2023-2024 to FY 2032-2033
Construction/Rehab 3,000,000
Inspection 250,000
Design -
Eng Admin Reimbursements 425,000
Long-Range Costs 10,000,000
Total 13,675,000
Funding Sources FY 2023-2024 to FY 2032-2033
Revenue Bonds 3,675,000
TBD 10,000,000
Total 13,675,000
Budget Impact/Other
An assessment will be done upon completion of project to determine maintenance costs. This project is required by TCEQ.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# 22023
Project Name Wesley Seale Dam Dewatering/Spillway Gate Rehab
Type Reconditioning-Asset Longevity Department Water Department _
Useful Life 40 years Contact Director of Water Utilities
Category Water Supply Priority Critical-Asset Condition/longevity ,.
6 �
Council District Outside City Limits
Status Active
Description
This project provides a new dewatering system at Wesley Seale Dam,it will protect the integrity of Wesley Seale Dam system(1957),to provide
for proper inspection and maintenance of crest gates and seals pursuant to regulatory reports per TCEQ.Project will also provide for necessary
improvements to the gates including seal replacement,miscellaneous structural repairs,full gate reconstruction and application of a protective
coating system for new gates. The gate reconstruction will be completed in 6 phases.
Justification
Wesley Seale Dam has 60 crest gates located in two separate spillways: south spillway includes 27 gates and north spillway includes 33 gates. The
crest gates are critical infrastructure holding the top 6 feet of water supply in Lake Corpus Christi.Over the years,leakage from side seals has
increased and become significant at several gates.Water flow from excessive leakage damages concrete and encourages algae and other vegetative
growth. This leads to corrosion issues on gates,metal appurtenances and reinforcing steel.
Expenditures FY 2023-2024 to FY 2032-2033
Construction/Rehab 14,400,000
Design -
Eng Admin Reimbursements 1,000,000
Long-Range Costs -
Total 15,400,000
Funding Sources FY 2023-2024 to FY 2032-2033
Revenue Bonds 15,400,000
TBD -
Total 15,400,000
Budget Impact/Other
An assessment will be done upon completion of project to determine maintenance costs.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# LR 5 SEQ LR 5
Project Name Wesley Seale Dam Infrastructure Improvements
Type Improvement/Additions Department Water Department
Useful Life 40 years Contact Director of Water Utilities
Category Water Supply Priority Critical-Asset Condition/longevity
Council District Outside City Limits
Status Long-Range
Description
This project will consist of infrastructure improvements to the Wesley Seale Dam.
Justification
Expenditures FY 2023-2024 to FY 2032-2033
Long-Range Cost 20,000,000
Total 20,000,000
Funding Sources FY 2023-2024 to FY 2032-2033
TBD 20,000,000
Total 20,000,000
Budget Impact/Other
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# 23027
Project Name Mary Rhodes Pipeline Phase 1 Assessment —_-_
Type Improvement/Additions Department Water Department
Useful Life 40 years Contact Director of Water Utilities
Category Water Supply Priority Critical-Health&Safety
Council District Outside City Limits
Status Active
Description
The City of Corpus Christi owns and operates the Mary Rhodes Phase I(MRPI)pipeline for the delivery of raw water to the O.N. Stevens Water
Treatment Plant from both Lake Texana and the Colorado River.MRPI consists of 101 miles of pipeline to Lake Texana in Edna,TX. The City has
a contract with Lavaca-Navidad River Authority to purchase water from Lake Texana.
This project consists of an assessment review to determine the condition and capacity of the pipeline.Once assessment is completed rehabilitation
and improvements will be carried out in order of priorities determined by the assessment.
Justification
This project will provided detail and analysis regarding the pipeline efficiency,reliability,and capacity.Required repairs and upgrades will
also be identified and designed.
Expenditures FY 2023-2024 to FY 2032-2033
Inspection -
Design 1,100,000
Eng Admin Reimbursements 131,000
Long-Range Costs -
Total 1,231,000
Funding Sources FY 2023-2024 to FY 2032-2033
Revenue Bonds -
Raw Water Fund 1,231,000
TBD -
Total 1,231,000
Budget Impact/Other
An assessment will be done upon completion of project to determine maintenance costs.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# E13037
Project Name Mary Rhodes Pipeline System Improvements
I
Type Improvement/Additions Department Water Department
Useful Life 40 years Contact Director of Water Utilities
Category Water Supply Priority Critical-Health&Safety r
;,.•. Z
Council District Outside City Limits
Status Active
Description
The City of Corpus Christi owns and operates the Mary Rhodes Phase I(MRPI)pipeline for the delivery of raw water to the O.N. Stevens Water
Treatment Plant from both Lake Texana and the Colorado River.MRPI consists of 101 miles of pipeline to Lake Texana in Edna,TX. The City has
a contract with Lavaca-Navidad River Authority to purchase water from Lake Texana.Improvements to Mary Rhodes Pipeline Pump Stations are
required to ensure continuous water supply from the Phase 1 Pipeline. This project addresses replacement and upgrade of various outdated system
components,including,but not limited to electrical,instrumentation,mechanical,structural,incoming power supply upgrades,and HVAC at
Woodsboro and Bloomington Pump Stations.A new pumping assembly will be added to the Bloomington pump station. Two new Variable
Frequency Drives(VFD)will be installed at Bloomington and one at the Woodsboro pump station.
Justification
This project improves the operational efficiency and reliability of Mary Rhodes Pipeline pump stations.
Expenditures FY 2023-2024 to FY 2032-2033
Construction/Rehab 12,000,000
Inspection 250,000
Design -
Eng Admin Reimbursements 500,000
Long-Range Costs -
Total 12,750,000
Funding Sources FY 2023-2024 to FY 2032-2033
Revenue Bonds -
Raw Water Fund 12,750,000
TBD -
Total 12,750,000
Budget Impact/Other
An assessment will be done upon completion of project to determine maintenance costs.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# 19025
Project Name Mary Rhodes Pipeline II System Improvements(Bank Erosion)
Type hnprovement/Additions Department Water Department l
Useful Life 40 years Contact Director of Water Utilities
Category Water Supply Priority Critical-Health&Safety 1
Council District Outside City Limits
Status Active
Description
The City of Corpus Christi owns and operates the Mary Rhodes Phase II pipeline(MRPII)for the delivery of raw water to the O.N. Stevens Water
Treatment Plant from the Colorado River.MRPII consists of 42 miles of pipeline to the Colorado River in Bay City,TX where the City has a run of
the river water rights. This project includes various required improvements to Mary Rhodes Phase 2 pumping system.Improvements include,but
are not limited to river bank stabilization due to natural erosion and other improvements as identified. The City applied and was selected for a cost
share agreement with the U.S.Army Corps of Engineers under Section 14 of the Flood Control Act of 1946(Public Law 79-526)for a cost share
agreement for the riverbank stabilization. The federal cost share portion will be up to$10 million for design and construction.
Justification
This project improves the operational efficiency and reliability of Mary Rhodes Pipeline pump stations.
Expenditures FY 2023-2024 to FY 2032-2033
Planning -
Construction/Rehab 12,250,000
Design 1,226,000
Eng Admin Reimbursements 795,000
Long-Range Costs -
Total 14,271,000
Funding Sources FY 2023-2024 to FY 2032-2033
Grant-U.S.Army Corps of Engineers 8,569,900
Revenue Bonds 5,701,100
Raw Water Fund -
TBD -
Total 14,271,000
Budget Impact/Other
An assessment will be done upon completion of project to determine maintenance costs.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# E16417
Project Name Nueces River Raw Water Pump Station Transmission Main
Type Improvement/Additions Department Water Department
Useful Life 40 years Contact Director of Water Utilities
Category Water Distribution Priority Critical-Health&Safety
Council District 1
Status Active
Description
The O.N. Stevens Water Treatment Plant(ONSWTP)is being upgraded to meet additional demands and treatment capacity requirements. The
Nueces River Pump Station supplies water from the Nueces river to the ONSWTP through two—54"pipelines. The project will install a third 54"
transmission main from the Nueces River Pump Station to ONSWTP. The project is critical for the ONSWTP to achieve a treatment capacity of
160 MGD.
Justification
The project improves the transmission capability of the Nueces River Pump Station to provide water to the O.N. Stevens Water Treatment Plant.
Expenditures FY 2023-2024 to FY 2032-2033
Construction/Rehab -
Contingency 300,000
Eng Admin Reimbursements 30,000
Long-Range Costs -
Total 330,000
Funding Sources FY 2023-2024 to FY 2032-2033
Revenue Bonds 330,000
TBD -
Total 330,000
Budget Impact/Other
An assessment will be done upon completion of project to determine maintenance costs.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# LR 6 SEQ LR 6
Project Name Mary Rhodes I Pump Station Upgrades
Type Improvement/Additions Department Water Department
Useful Life 40 years Contact Director of Water Utilities
Category Water Supply Priority Critical-Asset Condition/longevity
Council District Outside City Limits
Status Long-Range
Description
This project will address the findings from the Mary Rhodes Pipeline assessment 23027,and can include but is not limited to: replacement of
necessary portions of the pipeline with a higher pressure rated pipe(between Edna and Bloomington),adding clean-out stations,cleaning pipeline,
installing pumps in all remaining slots for final phase pump buildout,and upsizing the 2 MG tank to a 6 MG tank at both Woodsboro and
Bloomington Pump Stations.Each pump station currently houses 4 pumps and a 2 million gallon on-site storage tank.In addition,pipeline is
currently rated to run pump schedule 4 for a max of 79 MGD for brief periods of time. These upgrades will allow for the pipeline system to run at
design capacity.
Justification
Expenditures FY 2023-2024 to FY 2032-2033
Long-Range Cost 27,300,000
Total 27,300,000
Funding Sources FY 2023-2024 to FY 2032-2033
TBD 27,300,000
Total 27,300,000
Budget Impact/Other
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project 21104
Project Name ONSWTP Chlorine System Improvements
Type Improvement/Additions Department Water Department
Useful Life 40 years Contact Director of Water Utilities"
Category Water Treatment Priority Critical-Health&Safety
Council District 1
Status Active
Description
This project will replace existing,aging chlorine gas system with safer and more reliable on-site hypochlorite generation system. This will eliminate
the health and life risk of exposure to chlorine gas to ONSWTP staff and surrounding communities.Will also include modifications to the existing
chlorine dioxide system.
Justification
Proposed improvements will completely eliminate ONSWTP's dependence on hazardous liquid chlorine for water disinfection thereby reducing
health and life risk of ONSWTP staff and surrounding communities.
Expenditures FY 2023-2024 to FY 2032-2033
Construction/Rehab 65,000,000
Contingency -
Eng Admin Reimbursements 2,200,000
Long-Range Costs 15,500,000
Total 82,700,000
Funding Sources FY 2023-2024 to FY 2032-2033
Revenue Bonds 67,200,000
TBD 15,500,000
Total 82,700,000
Budget Impact/Other
An assessment will be done upon completion of project to determine maintenance costs.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# 18131
Project Name ONSWTP Clearwell No.3
Type hnprovement/Additions Department Water Department
Useful Life 40 years Contact Director of Water Utilities
Category Water Treatment Priority Critical-Health&Safety
Council District 1
Status Active
T
Description
Clearwell 1 at ONSWTP has a 4 MG capacity and was originally constructed in 1954.It has exceeded its design lifespan with severe deterioration.
In addition,with increased treatment capacity of ONSWTP,Clearwell 1 cannot meet TCEQ requirements of providing a minimum clear well
storage capacity. This project will build a new Clearwell 3 at ONSWTP to meet the requirements of treatment capacity and operations.The 10 MG
Clearwell 2 at ONSWTP remains in good condition and is able to function as intended.
Justification
This project ensures compliance with TCEQ requirements.
Expenditures FY 2023-2024 to FY 2032-2033
Construction/Rehab 15,954,000
Design -
Contingency 500,000
Eng Admin Reimbursements 915,000
Long-Range Costs -
Total 17,369,000
Funding Sources FY 2023-2024 to FY 2032-2033
Revenue Bonds 17,369,000
TBD -
Total 17,369,000
Budget Impact/Other
An assessment will be done upon completion of project to determine maintenance costs.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# 21030
Project Name ONSWTP Electrical Generation&Distribution Improvements
Type Reconditioning-Asset Longevity Department Water Department
Useful Life 40 years Contact Director of Water Utilities
Category Water Treatment Priority Critical-Asset Condition/longevity
Council District 1
v�
Status Active
Description
This project consists of technical assistance with troubleshooting electrical and instrumentation issues,configuration,modeling,condition
assessments,and electrical system documentation management.Improvements include design and implementation of improved power generation,
power feed improvements for the pumping complex,replacement of protection equipment that has reached its service life,and integration of power
protection equipment into a real-time monitoring and diagnostic network.
Justification
This project will prevent plant shutdowns due to aged electrical equipment.Managed electrical system performance with early detection of potential
causes of failure will be achieved.Power consumption monitoring for optimization will reduce operational cost.
Expenditures FY 2023-2024 to FY 2032-2033
Construction/Rehab 15,000,000
Inspection 75,000
Design 900,000
Long-Range Costs -
Total 15,975,000
Funding Sources FY 2023-2024 to FY 2032-2033
Revenue Bonds 15,975,000
TBD -
Total 15,975,000
Budget Impact/Other
An assessment will be done upon completion of project to determine maintenance costs.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# 23024
Project Name ONSWTP Electrical Reliability Upgrades
Type Reconditioning-Asset Longevity Department Water Department
Useful Life 40 years Contact Director of Water Utilities
Category Water Treatment Priority Critical-Health&Safety
Council District 1
Status Active
Description
This project will increase electrical reliability and resiliency of the ON Stevens Water Treatment Plant(ONSWTP)based on recommendations
from Jacobs Engineering and AEP Texas.Project outcomes include reduced power outages and addition of redundant power capabilities to
maintain water treatment and water distribution requirements.
Justification
Electrical reliability and resiliency is needed at ONSWTP because Power Control Room I(PCR I)is a single point of failure for the plant wide
electrical system. The plant has also experienced numerous unplanned AEP outages in the recent past causing pressure drops in the distribution
system.
Expenditures FY 2023-2024 to FY 2032-2033
Construction/Rehab 7,000,000
Design 700,000
Eng Admin Reimbursements 385,000
Long-Range Costs -
Total 8,085,000
Funding Sources FY 2023-2024 to FY 2032-2033
Revenue Bonds 8,085,000
TBD -
Total 8,085,000
Budget Impact/Other
An assessment will be done upon completion of project to determine maintenance costs.Operational budget impact should be improved
through more efficient equipment.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# 19032
Project Name ONSWTP Filtration System Hydraulic Improvements
Type Improvement/Additions Department Water Department
Useful Life 25 years Contact Director of Water Utilities — '
Category Water Treatment Priority Critical-Asset Condition/longevity
Council District 1
Status Active
Description
This project will upgrade filtration system components and equipment that has reached its end of service life.Additionally,the project will addres
post-filtration hydraulic issues. The project is required to obtain a reliable treatment capacity of 160 MGD from the ON Stevens Water Treatment
Plant.Improvements include but will not be limited to: upgrades to filtration piping;replacement of filter gates,valve,and actuators;and filtration
system effiuent piping and channel hydraulic improvements.
Justification
Proposed improvements will fix the hydraulics on the back end of the plant to facilitate the production of 160 MGD.
Expenditures FY 2023-2024 to FY 2032-2033
Construction/Rehab 18,750,000
Inspection 250,000
Design -
Eng Admin Reimbursements 1,000,000
Long-Range Costs -
Total 20,000,000
Funding Sources FY 2023-2024 to FY 2032-2033
Revenue Bonds 20,000,000
TBD -
Total 20,000,000
Budget Impact/Other
An assessment will be done upon completion of project to determine maintenance costs.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# 22407
Project Name ONSWTP Flocculation Upgrades&Baffling
Type Reconditioning-Asset Longevity Department Water Department -- � -
Useful Life 40 years Contact Director of Water Utilities - - �
Category Water Treatment Priority Critical-Asset Condition/longevity — '
I
Council District 1 �I
Status Active
Description
The purpose of this project is to upgrade the existing walking beam flocculators in basins 1 and 2 at O.N.Stevens Water Treatment Plant. The
existing equipment is obsolete,causes operational issues and are high-maintenance. This has necessitated need of replacing these aging equipment
with more reliable,low-maintenance equipment like paddle wheel flocculator.Preliminary design will be carried out to evaluate the best suited
alternative followed by detailed design and construction. This equipment will provide adequate mixing and prevent floc carryover into other areas
of the treatment process and ensure the water treatment plant can continue to meet state and federal drinking water standards. This project will also
add baffle walls to Plant 1 Secondary Basins 1 and 2. These baffle walls are intended to provide adequate chemical mixing and even out flow
distribution.
Justification
This project improves water treatment efficiency by upgrading Basin 1 and 2 walking beam flocculators.Baffle walls to be added to Plant 1 and
Secondary Basins 1 and 2 which are required for adequate chemical mixing and even flow distribution.
Expenditures FY 2023-2024 to FY 2032-2033
Construction/Rehab 16,000,000
Design -
Eng Admin Reimbursements 1,000,000
Long-Range Costs -
Total 17,000,000
Funding Sources FY 2023-2024 to FY 2032-2033
Revenue Bonds 17,000,000
TBD -
Total 17,000,000
Budget Impact/Other
An assessment will be done upon completion of project to determine maintenance costs.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# 24026
Project Name ONSWTP Fluoride System Improvements
Type Improvement/Additions Department Water Department
Useful Life 25 years Contact Director of Water Utilities
Category Water Treatment Priority Critical-Asset Condition/longevity
Council District 1
as aR
Status Active
Description
This project will upgrade the existing Fluoride injection system.Operational issues of the current system will be addressed and upgrades will be
implemented to ensure a consistent and effective Fluoride feed.Hydrofluorosilicic acid is added in the treatment of potable water through a
controlled liquid feed system at the ONSWTP.As Fluoride is a very corrosive chemical,the design will focus on the safe operation and
maintenance of the system.
Justification
The current system requires upgrades including but not limited to bulk storage,piping replacement,building exhaust,corrosion points,scales,
injection points,and pumps.
Expenditures FY 2023-2024 to FY 2032-2033
Construction/Rehab 1,900,000
Inspection 100,000
Design 300,000
Eng Admin Reimbursements 120,000
Long-Range Costs -
Total 2,420,000
Funding Sources FY 2023-2024 to FY 2032-2033
Revenue Bonds 2,420,000
TBD -
Total 2,420,000
Budget Impact/Other
An assessment will be done upon completion of project to determine maintenance costs.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# 22405
Project Name ONSWTP Navigation Pump Station Improvements
Type Improvement/Additions Department Water Department
Useful Life 40 years Contact Director of Water Utilities Aq)
Category Water Treatment Priority Critical-Health&Safety
Council District 1
Status Active
Description
The City of Corpus Christi owns the Navigation Pump Station(PS),located at 302 North Navigation Blvd,Corpus Christi,Texas,which consists o
2- 10 MG tanks.Under the current distribution system set up,the pump station does not contribute to maintenance of system pressure and was
taken out of service in 2018. This project includes changes to Navigation Pump Station and surrounding distribution piping to help the City
improve water delivery and water quality in the distribution system.A feasibility study followed by design will be carried out for these
improvements. The major anticipated improvements for this project include upgrades to existing three pumps,one new pump and four new VFDs,
and potential transmission main upgrades.
Justification
This project improves the operational efficiency and reliability of the Navigation pump station.
Expenditures FY 2023-2024 to FY 2032-2033
Construction/Rehab 10,000,000
Design -
Eng Admin Reimbursements 500,000
Long-Range Costs -
Total 10,500,000
Funding Sources FY 2023-2024 to FY 2032-2033
Revenue Bonds 10,500,000
TBD -
Total 10,500,000
Budget Impact/Other
An assessment will be done upon completion of project to determine maintenance costs.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# E17047
Project Name ONSWTP Raw Water Influent and Chemical Facilities Improvements
Type Improvement/Additions Department Water Department
Useful Life 40 years Contact Director of Water Utilities
Category Water Treatment Priority Critical-Health&Safety4
t.v
Council District 1 w�
akb: F
Status Active
Description
This project will address existing hydraulic constraints and upgrade the chemical feed systems for optimized dosing,monitoring,and control of
water treatment chemicals at ON Stevens Water Treatment Plant. These improvements are necessary to meet TCEQ requirements and support an
increase in water treatment capacity. The project is required to achieve a treatment capacity of 135 MGD with a future treatment capacity of 160
MGD.
Justification
This project will allow the Plant to meet upcoming demand as projected by the Texas Water Development Board,increase treatment capacity and
improve treatment efficiency.
Expenditures FY 2023-2024 to FY 2032-2033
Construction/Rehab 65,000,000
Design -
Contingency 1,300,000
Eng Admin Reimbursements 3,000,000
Long-Range Costs -
Total 69,300,000
Funding Sources FY 2023-2024 to FY 2032-2033
PAYGO -
Revenue Bonds 10,500,000
TBD -
Total 10,500,000
Budget Impact/Other
An assessment will be done upon completion of project to determine maintenance costs. The cost to treat water should be reduced due to increased
plant efficiencies.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# 22406 ��
Project Name ONSWTP Recycle Pond Improvements
Type Improvement/Additions Department Water Department
Useful Life 40 years Contact Director of Water Utilities
Category Water Treatment Priority Critical-Health&Safety
Council District 1
Status Active
Description
The O.N.Stevens Water Treatment Plant utilizes Lagoon-7 also known as wash-water recycle pond for decanting solids from backwash water sent
by the filters. The decanted water is pumped back to the head of the plant with the help of existing wash-water return pump station located adjacent
to the berms. The berm around the ponds is currently experiencing leakage and deterioration that has occurred as a result of this leakage along with
weather,runoff,and destructive pests.Leakage has also been observed at the wash-water return pump station. This has necessitated
condition assessment to identify extent of damage followed by repairs to prevent failure and reduce leakage.After performing a detailed condition
assessment and developing recommendations,necessary repairs shall be carried out to establish the integrity of the earthen berm and associated
facilities to ensure compliance with state and federal regulations,and protect the safety of people,property,and the environment as well as aid in
optimizing recycled water return.
Justification
Proposed improvements will repair earthen berms,stop leakage at the pond and at pump station in order to maintain compliance with state and
federal regulations,as well as reduce water loss and ensure safe working conditions at the plant.
Expenditures FY 2023-2024 to FY 2032-2033
Construction/Rehab 2,930,000
Inspection 470,000
Design 350,000
Eng Admin Reimbursements 450,000
Long-Range Costs -
Total 4,200,000
Funding Sources FY 2023-2024 to FY 2032-2033
Revenue Bonds 4,200,000
TBD -
Total 4,200,000
Budget Impact/Other
There is no projected operational impact with this project at this time.A reassessment will be done upon completion of project to determine on-
going or maintenance costs.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# LR 8 SEQ LR 8
Project Name ONSWTP Clearwell No.4
Type Improvement/Additions Department Water Department
Useful Life 40 years Contact Director of Water Utilities
Category Water Treatment Priority Critical-Health&Safety
Council District 1
Status Long-Range
Description
Clearwell#4 will be additional underground storage to replace the Clearwell No.2 constructed in 1981.Project will continue into Year 11 and 12.
Justification
Expenditures FY 2023-2024 to FY 2032-2033
Long-Range Cost 20,000,000
Total 20,000,000
Funding Sources FY 2023-2024 to FY 2032-2033
TSD 20,000,000
Total 20,000,000
Budget Impact/Other
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# 22408
ProjPg
J �-
Project Name ONSWTP SecurityUpgrade
Type Improvement/Additions Department Water Departmentl�i
Useful Life 15 years Contact Director of Water Utilities
Category Water Treatment Priority Needed-Deficient Services
Council District 1
Status Active
Description
O.N. Stevens WTP is the only water treatment plant in the city of Corpus Christi and is considered critical infrastructure for residents,schools,
hospitals and surrounding industry.Currently the plant is surrounded by chain link fence and minimal security camera presence. This project would
upgrade 10 more structurally sound fencing and install additional security cameras around the plant perimeter. This project will be designed and
constructed in multiple phases.
Justification
Project will provide needed security enhancements to protect the O.N. Stevens WTP which is the only water treatment plant in the city of Corpus
Christi and is considered critical infrastructure for residents,schools,hospitals and surrounding industry.
Expenditures FY 2023-2024 to FY 2032-2033
Construction/Rehab 2,000,000
Design 400,000
Capital Equipment 110,000
Eng Admin Reimbursements 240,000
Long-Range Costs 5,400,000
Total 8,150,000
Funding Sources FY 2023-2024 to FY 2032-2033
Revenue Bonds 2,750,000
TBD 5,400,000
Total 8,150,000
Budget Impact/Other
An assessment will be done upon completion of project to determine maintenance costs.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project 18130 . v �
Project Name ONSWTP Sedimentation Basin Improvements
Type Improvement/Additions Department Water Department
Useful Life 40 years Contact Director of Water Utilities
Category Water Treatment Priority Critical-Health&Safety
Council District 1
Status Active
Description
This project will dredge,dewater,haul,and dispose 28,000-44,000 dry tons(DT)of water treatment plant residuals from the pre-sedimentation
basin located at ON Stevens Water Treatment Plant(ONSWTP).Project scope also includes remove existing vegetation and cattails from the
basin.
Justification
The pre-sedimentation basin is greater than 40%full and must be dredged to increase storage capacity and assist in construction of E17047
ONSWTP Raw Water Influent and Chemical Feed Improvements project.
Expenditures FY 2023-2024 to FY 2032-2033
Construction/Rehab 13,000,000
Testing 585,000
Design -
Eng Admin Reimbursements 560,000
Long-Range Costs -
Total 14,145,000
Funding Sources FY 2023-2024 to FY 2032-2033
Revenue Bonds 14,145,000
TBD -
Total 14,145,000
Budget Impact/Other
An assessment will be done upon completion of project to determine maintenance costs.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# E13051 +,
Project Name ONSWTP Site Infrastructure Improvements
Type hnprovement/Additions Department Water Department
Useful Life 40 years Contact Director of Water Utilities �t
Category Water Treatment Priority Critical-Health&Safety
Council District 1
aa,
t L.,
Status Active
Description
This project will serve as a mechanism to execute major facility and site improvements,end-of-life equipment replacement,and unanticipated
capital upgrades for ONSWTP.Improvements will include,but not limited to,pump station valving;filter-to-drain butterfly valves replacement,
filter-to-waste butterfly valves replacement;facilitates structural repairs;cable tray foundation repairs,FBI building relocation,and storm water
drainage repair and improvements.
Justification
Project will reduce risk of unexpected equipment or facilities failure.Responsible,proactive replacement and upgrade instead of reactive emergency
repair can reduce cost of operation and better predictable system performance.
Expenditures FY 2023-2024 to FY 2032-2033
Construction/Rehab 3,500,000
Testing -
Design 250,000
Eng Admin Reimbursements 300,000
Long-Range Costs -
Total 4,050,000
Funding Sources FY 2023-2024 to FY 2032-2033
Revenue Bonds 4,050,000
TBD -
Total 4,050,000
Budget Impact/Other
There is no projected operational impact with this project at this time.A reassessment will be done upon completion of project to determine on-
going or maintenance costs.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project 23059
Project Name ONSWTP Solids Handling&Disposal Facility
Type Improvement/Additions Department Water Department
Useful Life 40 years Contact Director of Water Utilities �t
Category Water Treatment Priority Critical-Health&Safety
Council District 1
aa,
t L.,
Status Active
Description
The purpose of this project is to design and construct a new solids handling facility at O.N. Stevens WTP.ONSWTP uses conventional water
treatment processes(coagulation,flocculation,sedimentation,filtration)for removal of turbidity and naturally occurring organic matter. The
combination of these processes generates a solids waste stream that is stored using three(3)on-site and four(4)off-site lagoons.Once filled,the on-
site lagoons require the City to hire a 3rd party contractor to remove accumulated solids,dewater and haul to the landfill.Further,the initial solids
storage permit allowed for permit renewals of off-site lagoon storage only until 2026.It is essential that a new solids handling facility be built at
ONSWTP as a long term solution to manage solids.
Justification
ONSWTP has limited capacity in on-site lagoons and off-site lagoons for solids storage.
Expenditures FY 2023-2024 to FY 2032-2033
Construction/Rehab 24,000,000
Design 3,000,000
Contingency 500,000
Eng Admin Reimbursements 1,200,000
Long-Range Costs 15,000,000
Total 43,700,000
Funding Sources FY 2023-2024 to FY 2032-2033
Revenue Bonds 28,700,000
TBD 15,000,000
Total 43,700,000
Budget Impact/Other
An assessment will be done upon completion of project to determine maintenance costs. The cost to treat the water should be reduced due to plant
efficiencies.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# 26003
Project Name ONSWTP Third Treatment Train
Type Improvement/Additions Department Water Department t
Useful Life 40 years Contact Director of Water Utilities
Category Water Treatment Priority Critical-Asset Condition/longevity p
Council District 1
Status Active �
Description �.
The ON Stevens Water Treatment Plant was originally constructed in 1954. The master plan for this facility includes the addition of a third
treatment train. This expansion is required to obtain a treatment capacity of 160 MGD with a peak capacity of 200 MGD. The additional train will
also allow for the ability to complete maintenance and upgrades on the other treatment trains.
Justification
This expansion is required to obtain a treatment capacity of 160 MGD with a peak capacity of 200 MGD.
Expenditures FY 2023-2024 to FY 2032-2033
Design 5,500,000
Eng Admin Reimbursements 500,000
Long-Range Costs 90,000,000
Total 96,000,000
Funding Sources FY 2023-2024 to FY 2032-2033
Revenue Bonds 6,000,000
TBD 90,000,000
Total 96,000,000
Budget Impact/Other
An assessment will be done upon completion of project to determine maintenance costs.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project 23025
Project Name ONSWTP Weir Improvements-Basins 3&4
Type Improvement/Additions Department Water Department I
_
Useful Life 40 years Contact Director of Water Utilities �t
Category Water Distribution Priority Critical-Health&Safety
Council District 1
aa,
t L.,
Status Active
Description
Basins 3 and 4 located in O.N. Stevens Water Treatment Plant Train 2 are a finger weir style that protrudes from the end of the basins into the
secondaries. The general layout of the finger weirs causes an uneven distribution of water flowing over the weirs.Upgrading the weirs to straight
weirs along the end of the basin will optimize settling time by allowing the water more time to travel before flowing over the weirs and allow for
even distribution of water flow.
Justification
Upgrading Basins 3 and 4 finger weirs to straight weirs,or an engineer approved style,at the end of the secondaries to improve flows and
optimize use of the space for settling.
Expenditures FY 2023-2024 to FY 2032-2033
Design 700,000
Eng Admin Reimbursements 77,000
Long-Range Costs 8,070,000
Total 8,847,000
Funding Sources FY 2023-2024 to FY 2032-2033
Revenue Bonds 777,000
TBD 8,070,000
Total 8,847,000
Budget Impact/Other
An assessment will be done upon completion of project to determine maintenance costs. The cost to treat the water should be reduced due to plant
efficiencies.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# 23061 -
Project Name 16"Water Main Extension HWY 286-Alameda
?c
Type hnprovement/Additions Department Water Department
Useful Life 40 years Contact Director of Water Utilities
Category Water Distribution Priority Critical-Health&Safety
Council District 1
Status Active *T
Description
This project will consist of installing approximately 3,1001f of new 16"PVC main beginning at Crosstown Expressway,running along Caldwell
and connecting to a 16"main at Alameda and Laredo.It will make use of the new 16"crossing at Crosstown and provide redudancy to the
downtown area.
Justification
This project will assist in the need for reliable services and will offer redundancy to downtown.
Expenditures FY 2023-2024 to FY 2032-2033
Construction/Rehab 6,000,000
Design 325,000
Eng Admin Reimbursements 635,000
Long-Range Costs -
Total 6,960,000
Funding Sources FY 2023-2024 to FY 2032-2033
Revenue Bonds 6,960,000
TBD -
Total 6,960,000
Budget Impact/Other
An assessment will be done upon completion of project to determine maintenance costs.Operational budget impact should be improved through
more efficient equipment.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# 18154/23064 -
Project Name City-Wide Large-Size Water Line Cathodic Protection _ �
Type Rehabilitation Department Water Department
Useful Life 25 years Contact Director of Water Utilities
Category Water Distribution Priority Critical-Asset Condition/longevity
Council District City-Wide
n.
Status Active
Description
A majority of the City's large diameter transmission lines have been in service many years and are made of non-plastic corrosive materials such as
Cast Iron Pipe(CIP),Ductile Iron Pipe(DIP),Concrete Steel Cylinder Pressure(CSCP)and steel.In some cases,these lines were installed with
cathodic protection systems to help minimize corrosion and in some cases,they were not. This project will ensure reliable delivery of drinking
water for years to come by assessing the physical condition,both external and internal,of transmission mains and associated cathodic protection
systems and determining the remaining useful life of each asset.In addition,the project will also repair the most critical lines that have significant
maintenance/repair history or where failure may be reasonably expected in the near future.
Justification
This project will improve the service life and water quality of City's large water lines.
Expenditures FY 2023-2024 to FY 2032-2033
Construction/Rehab 6,000,000
Design 300,000
Eng Admin Reimbursements 363,000
Long-Range Costs 2,500,000
Total 9,163,000
Funding Sources FY 2023-2024 to FY 2032-2033
Revenue Bonds 6,663,000
TBD 2,500,000
Total 9,163,000
Budget Impact/Other
This project itself does not increase revenue or decrease expenses,but it prevents cost of maintenance from rising.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# 19037/23065/23107 -
Project Name City-Wide Water Line Repair/Replace-Large Diameter _ �
Type Reconditioning-Asset Longevity Department Water Department
Useful Life 40 years Contact Director of Water Utilities
Category Water Distribution Priority Critical-Asset Condition/longevity
Council District City-Wide
Status Active
Description
This project provides a strategic lifecycle program for replacement and extension of the City's water distribution system(1,800 miles). The program
is flexible and provides a systematic approach to extend service life of the system while enhancing monitoring capability and water quality. The
program also provides a mechanism to quickly address emergency and priority projects as they arise reducing service outages,and operational
Justification
Extension of service life of water mains is critical to ensuring integrity of the system.
Expenditures FY 2023-2024 to FY 2032-2033
Construction/Rehab 30,000,000
Design 600,000
Eng Admin Reimbursements 1,355,655
Long-Range Costs 84,000,000
Total 115,955,655
Funding Sources FY 2023-2024 to FY 2032-2033
Grant-American Rescue Act -
Revenue Bonds 31,955,655
TBD 84,000,000
Total 115,955,655
Budget Impact/Other
This project itself does not increase revenue or decrease expenses,but it prevents cost of maintenance from rising.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# 19010/23073/23108 -
Project Name City-Wide Water Line Repair/Replace-Small Diameter _ �
Type Improvement/Additions Department Water Department
Useful Life 40 years Contact Director of Water Utilities
Category Water Distribution Priority Critical-Asset Condition/longevity
Council District City-Wide
Status Active Te ,�
Description
This project provides the replacement of small diameter water lines within the City's water distribution system. The strategic life cycle management
and replacement of these assets is predicated on an a likelihood-of-failure(LOF)risk analysis that utilizes historical failure data,condition
assessments and asset specifications. The program is flexible and provides a systematic approach to replacing aging water lines while enhancing
water quality.Additional benefits will include increased distribution reliability with reduced service outages and reduced operational costs.
Justification
The extension of service life for water mains is critical to ensuring integrity of the system.
Expenditures FY 2023-2024 to FY 2032-2033
Construction/Rehab 30,000,000
Eng Admin Reimbursements 600,000
Long-Range Costs 70,000,000
Total 100,600,000
Funding Sources FY 2023-2024 to FY 2032-2033
Revenue Bonds 30,600,000
TBD 70,000,000
Total 100,600,000
Budget Impact/Other
This project itself does not increase revenue or decrease expenses,but it prevents cost of maintenance from rising.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# E16290/20267 "
Project Name Elevated Water Storage Tanks-City-Wide
-
Type Improvement/Additions Department Water Department
Useful Life 40 years Contact Director of Water Utilitiesad
��
Category Water Distribution Priority Critical-Asset Condition/longevity �� � �' �,
Council District City-Wide '"x'°=
Status Active
Description
The existing Elevated Storage Tanks(EST)have inadequate volume and elevation to meet minimum storage and pressure requirements as defined
by Texas Commission on Environmental Quality(TCEQ). The plan to meet these requirements is outlined below:
FY 23:Begin construction of new EST in Flour Bluff on Division Road.
FY24: Complete Construction of the Flour Bluff EST.Begin design and construction of new Calallen EST,corresponding Calallen pump station
located at ON Stevens WTP,and necessary water line improvements.Demolish Morgan EST.
FY 25: Complete Construction of new Cal alien EST,pump station,and water line improvements.Demolish old EST at Flour Bluff on Division
Road.
FY 26: Begin design of new EST at a yet to be determined site pending review and hydraulic modeling.
FY 27: Begin construction of new EST at a yet to be determined site.
FY 28: Complete construction of new EST at a yet to be determined site.
FY 29: Demolish existing Alameda and Gollihar ESTs.
Justification
This project will allow the city to meet its commitment to TCEQ.Higher tanks will additionally provide higher pressure and better pressure
stabilization in the distribution system as required.
Expenditures FY 2023-2024 to FY 2032-2033
Construction/Rehab 15,000,000
Capital Equipment 700,000
Design 1,470,000
Eng Admin Reimbursements 1,200,000
Long-Range Costs 35,500,000
Total 53,870,000
Funding Sources FY 2023-2024 to FY 2032-2033
Revenue Bonds 18,370,000
TBD 35,500,000
Total 53,870,000
Budget Impact/Other
A reassessment will be done upon completion of project to determine maintenance costs.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# 24020
Project Name E.Navigation Blvd Water Line Replacement
Type Improvement/Additions Department Water Department
Useful Life 40 years Contact Director of Water Utilities
Category Water Distribution Priority Critical-Health&Safety
Council District 1
Status Active
Description
This project will consist of replacement of existing 12"Cast Iron Pipe(CIP)water line along E.Navigation Blvd.from approximately 340 feet west
of Burleson St.to approximately 30 feet east of Texaco Street due to condition and age resulting in leaks and failures. The alignment of this existing
water line will be reviewed to ensure that a new route meets hydraulic expectations and also provides the appropriate back feed options to ensure
that service is reliable.
Justification
The existing water line is currently aging and in poor condition resulting in leaks and failures.
Expenditures FY 2023-2024 to FY 2032-2033
Construction/Rehab 11,000,000
Design 500,000
Eng Admin Reimbursements 600,000
Long-Range Costs -
Total 12,100,000
Funding Sources FY 2023-2024 to FY 2032-2033
Revenue Bonds 12,100,000
TBD -
Total 12,100,000
Budget Impact/Other
An assessment will be done upon completion of project to determine maintenance costs.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# 22144
Project Name Flour Bluff 18"Line Extension
Type hnprovement/Additions Department Water Department
Useful Life 40 years Contact Director of Water Utilities
Category Water Distribution Priority Critical-Asset Condition/longevity
Council District 4
Status Active
Description
The proposed construction would have the existing 18"main extended approximately 12,000 linear feet and connected to a larger transmission
main that runs along Flour B1uffDrive. This would provide the redundancy and flows needed to operate the 18"line at its full capacity.Cost
estimates and alignment are preliminary and may change during the design phase of the project.
Justification
This project will connect the 18"water transmission main to a source capable of providing flows that maximizes the delivery of water to Coral
Vines EST.Continued growth on Padre Island requires all systems operate to the fullest extent of their design capacity.In addition,due to the
Islands isolation from the main land,it is necessary to provide adequate redundancy capable of providing continued service in the event of any
parallel system failure.
Expenditures FY 2023-2024 to FY 2032-2033
Construction/Rehab 7,600,000
Design -
Eng Admin Reimbursements 485,000
Long-Range Costs -
Total 8,085,000
Funding Sources FY 2023-2024 to FY 2032-2033
Grant-American Rescue Act 6,510,000
Revenue Bonds 1,575,000
TBD -
Total 8,085,000
Budget Impact/Other
An assessment will be done upon completion of project to determine maintenance costs.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# 21038
Project Name Leopard St&Up River Rd Water Line Replacement
Type Improvement/Additions Department Water Department
Useful Life 40 years Contact Director of Water Utilities
Category Water Supply Priority Critical-Asset Condition/longevity
Council District 1
Status Active
Description
Project consist of removal of 32000 LF cast iron pipe and replace with new PVC Pipe. This project will serve both residential and commercial
services on the north side of IH 37 from Sessions Road to Sharpsburg Road. The diameter of the new line will be reviewed to ensure that it is
appropriate for the current hydraulic conditions.
Justification
The new line will serve the community without outages and other issues.High priority distribution water line.
Expenditures FY 2023-2024 to FY 2032-2033
Construction/Rehab 17,000,000
Design -
Eng Admin Reimbursements 840,000
Long-Range Costs -
Total 17,840,000
Funding Sources FY 2023-2024 to FY 2032-2033
Grant-American Rescue Act 9,490,000
Revenue Bonds 8,350,000
TBD -
Total 17,840,000
Budget Impact/Other
An assessment will be done upon completion of project to determine maintenance costs.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# 21039
Project Name Nueces Bay Blvd&Poth Lane-Water Line
Type Improvement/Additions Department Water Department
Useful Life 40 years Contact Director of Water Utilities
Category Water Distribution Priority Critical-Asset Condition/longevity
Council District 1
Status Active
Description
This is a new project to replace the approximately 9,000 LF of existing 16-in CIP water line along West Broadway Street and Nueces Bay Blvd.
from the intersection of Nueces Bay Blvd and I-37 Frontage Rd.to the intersection of West Broadway Street and Port Ave;and 5,000 LF of
existing 16-in CIP water line along Poth Lane from the intersection of Buddy Lawrence and Upriver Road. The existing 16-in CIP water line was
built in 1971-1978, 1954 respectively.
Justification
The replacement of the existing water line will increase the reliability of service to this area as the current infrastructure is aging.
Expenditures FY 2023-2024 to FY 2032-2033
Construction/Rehab 17,000,000
Design -
Eng Admin Reimbursements 750,000
Long-Range Costs -
Total 17,750,000
Funding Sources FY 2023-2024 to FY 2032-2033
Revenue Bonds 17,750,000
TBD -
Total 17,750,000
Budget Impact/Other
An assessment will be done upon completion of project to determine maintenance costs.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# 23021
Project Name Sand Dollar Connection Line 16"(Coral Vine) , + f -
o�
Type hnprovement/Additions Department Water Department
Useful Life 40 years Contact Director of Water Utilities`
Category Water Distribution Priority Critical-Asset Condition/longevity
Council District 4
Status Active ;
Description
This project is designed to extend an existing 16"water line from White Cap to the Coral Vine elevated storage tank and implement water
interconnections as needed. This infrastructure will allow the Sand Dollar pump station to more easily control operation of the elevated storage tank
on Padre Island and provide adequate supply for the anticipated growth.
Justification
The Sand Dollar Pump Station has caused distribution difficulties in the past due to its pumping capacity. Strengthening of the distribution system
is crucial to ensure normal operations and a reliable water supply to Padre Island.
Expenditures FY 2023-2024 to FY 2032-2033
Construction/Rehab 12,000,000
Design 600,000
Eng Admin Reimbursements 660,000
Long-Range Costs -
Total 13,260,000
Funding Sources FY 2023-2024 to FY 2032-2033
Revenue Bonds 13,260,000
TBD -
Total 13,260,000
Budget Impact/Other
An assessment will be done upon completion of project to determine maintenance costs.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# 20101 -
Project Name SH286 Water Line Replacement _ _m
Type hnprovement/Additions Department Water Department
Useful Life 40 years Contact Director of Water Utilities
Category Water Distribution Priority Critical-Asset Condition/longevity
Council District Outside City Limits
Status Active Te ,�
Description
This project is required to relocate the existing water line between FM43(Weber Rd)and FM2444(Staples St.)to meet the construction needs of
TxDOT's SH286 extension. The new line will adhere to the adopted Master Plan for this area.Due to lack of spacing within TxDOT's right-of way
this project will require land acquisition.
Justification
This project is required to relocate the existing water line between FM43(Weber Rd)and FM2444(Staples St.)to meet the construction needs of
TxDOT's SH286 extension.If this project is not completed the TxDOT's SH286 extension project will be delayed.
Expenditures FY 2023-2024 to FY 2032-2033
Construction/Rehab 11,000,000
Design -
Eng Admin Reimbursements 569,000
Long-Range Costs -
Total 11,569,000
Funding Sources FY 2023-2024 to FY 2032-2033
Revenue Bonds 11,569,000
TBD -
Total 11,569,000
Budget Impact/Other
This project itself does not increase revenue or decrease expenses,but it prevents cost of maintenance from rising.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# 24027
Project Name SH358 Water Line Relocation
Type Improvement/Additions Department Water Department
Useful Life 40 years Contact Director of Water Utilities
Category Water Distribution Priority Critical-Asset Condition/longevity
Council District 3/4
Status Active
Description
The project will relocate waterlines that would be in conflict with the Texas Department of Transportation Ramp Reversal Program between Staples
Street and Nile Drive.Eight inch ACP and PVC water line will be relocated along with associated fire hydrants and water meters. The work will be
completed prior to ramp reversal work.
Justification
The Texas Department of Transportation has issued a Notice of Required Accommodation to relocate the water lines in conflict with the SH 358
Phase 11 Ramp Reversal Project.
Expenditures FY 2023-2024 to FY 2032-2033
Construction/Rehab 1,250,000
Eng Admin Reimbursements 125,000
Long-Range Costs -
Total 1,375,000
Funding Sources FY 2023-2024 to FY 2032-2033
Revenue Bonds 1,375,000
TBD -
Total 1,375,000
Budget Impact/Other
An assessment will be done upon completion of project to determine maintenance costs.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# 18156 -
Project Name Ship Channel Water Line Relocation _ _m
Type Improvement/Additions Department Water Department
Useful Life 40 years Contact Director of Water Utilities
Category Water Distribution Priority Critical-Asset Condition/longevity
Council District 1
Status Active Te ,�
Description
This project is to relocate the existing two 16-in water line crossing the Ship Channel at the Avery Point. The U.S Army Engineering District,
Galveston(USAED)will soon commence the deepening and widening of the Corpus Christi Ship Channel. This project is to relocate the existing
two 16-in water line crossing the Ship Channel at the Avery Point as required by the USAED to facilitate the construction of Ship Channel
deepening. The demolition of the existing two 16-in water lines was planned by the Utilities in-house engineering.City has requested a Consultant
Engineer to evaluate the relocation options. This is a 50/50 cost sharing project between the City and the Port of Corpus Christi.
Justification
The Ship Channel deepening project will be delayed.
Expenditures FY 2023-2024 to FY 2032-2033
Construction/Rehab 5,659,787
Design -
Eng Admin Reimbursements 300,000
Long-Range Costs 84,000,000
Total 89,959,787
Funding Sources FY 2023-2024 to FY 2032-2033
Port of Corpus Christi 2,979,893
Revenue Bonds 2,979,894
TBD 86,979,893
Total 89,959,787
Budget Impact/Other
This project itself does not increase revenue or decrease expenses,but it prevents cost of maintenance from rising.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# 21041
Project Name South Side Water Transmission Main Cathodic Protection
Type Improvement/Additions Department Water Department
Useful Life 40 years Contact Director of Water Utilities
Category Water Distribution Priority Critical-Asset Condition/longevity
Council District City-Wide
Status Active
Description
This project provides for design and construction of Water Distribution Transmission Infrastructure cathodic protection to protect and extend useful
service life of the South Side Water Transmission from ON Stevens to Padre Island. This project is part of the citywide water transmission main
cathodic protection improvements.Cost estimates and alignment are preliminary and may change during the design phase of the project.Additional
work will be performed on the South Side distribution water network to increase efficiency and improve the overall network in this area;which is
seeing large growth in housing.
Justification
Cathodic protection design of water transmission infrastructure will extend useful service life of infrastructure asset.
Expenditures FY 2023-2024 to FY 2032-2033
Construction/Rehab 2,750,000
Inspection 50,000
Design 250,000
Contingency 25,000
Eng Admin Reimbursements 225,000
Long-Range Costs -
Total 3,300,000
Funding Sources FY 2023-2024 to FY 2032-2033
Revenue Bonds 3,300,000
TBD -
Total 3,300,000
Budget Impact/Other
An assessment will be done upon completion of project to determine maintenance costs.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# LR 17 SEQ LR 17
Project Name Rand Morgan 16"Water Main Extension
Type Improvement/Additions Department Water Department
Useful Life 40 years Contact Director of Water Utilities
Category Water Distribution Priority Critical-Asset Condition/longevity
Council District 1
Status Long-Range
Description
This project will create an interconnection of a 16"transmission main along Rand Morgan Rd from Agnes st to McNorton Rd. The interconnection
will be beneficial as growth and development increases in this area.
Justification
Expenditures FY 2023-2024 to FY 2032-2033
Long-Range Cost 5,775,000
Total 5,775,000
Funding Sources FY 2023-2024 to FY 2032-2033
TBD 5,775,000
Total 5,775,000
Budget Impact/Other
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# LR 18 SEQ LR 18
Project Name Relocation of Water Transmission Line at Corpus Christi Airport
Type Improvement/Additions Department Water Department
Useful Life 40 years Contact Director of Water Utilities
Category Water Distribution Priority Critical-Asset Condition/longevity
Council District 3
Status Long-Range
Description
The alignment of the existing 48"transmission line is underneath airport infrastructure.
Justification
Expenditures FY 2023-2024 to FY 2032-2033
Long-Range Cost 20,000,000
Total 20,000,000
Funding Sources FY 2023-2024 to FY 2032-2033
TSD 20,000,000
Total 20,000,000
Budget Impact/Other
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# LR 19 SEQ LR 19
Project Name South Side Transmission Main Line Constraint
Type Improvement/Additions Department Water Department
Useful Life 40 years Contact Director of Water Utilities
Category Water Distribution Priority Critical-Asset Condition/longevity
Council District 3
Status Long-Range
Description
Re-design of the fault mitigation design on the southside transmission main to eliminate the diameter restriction.
Justification
Expenditures FY 2023-2024 to FY 2032-2033
Long-Range Cost 7,000,000
Total 7,000,000
Funding Sources FY 2023-2024 to FY 2032-2033
TSD 7,000,000
Total 7,000,000
Budget Impact/Other
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# 23060
Project Name South Side Water Transmission Grid Completion,
Type Improvement/Additions Department Water Department
Useful Life 40 years Contact Director of Water Utilities
Category Water Supply Priority Critical-Asset Condition/longevity *+
Council District 3
1
Status Active
Description
This project is intended to prioritize and complete interconnections between multiple water transmission mains improving the systems redundancy,
improve chlorine residuals,and move water more effectively around the City. This project will also allow staff the ability to abandon the 30"
transmission main under South Padre Island Drive due to its age and the continued expansion of the roadway. This project may progress into the
long range,and will be reviewed for phasing once planning and design has been completed. This project continues on the long range.
Justification
This project will also allow Utilities staff the ability to abandon the 30"transmission main under South Padre Island Drive due to its age and the
continued expansion of the roadway. The new line will improve the functionality of these high priority distribution lines and increase service
reliability.
Expenditures FY 2023-2024 to FY 2032-2033
Construction/Rehab 16,500,000
Design 1,800,000
Eng Admin Reimbursements 680,000
Long-Range Costs 33,000,000
Total 51,980,000
Funding Sources FY 2023-2024 to FY 2032-2033
Revenue Bonds 18,980,000
TBD 33,000,000
Total 51,980,000
Budget Impact/Other
An assessment will be done upon completion of project to determine maintenance costs.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# 24021
Project Name Up River Rd Water Line Replacement
Type Improvement/Additions Department Water Department
Useful Life 40 years Contact Director of Water Utilities
Category Water Distribution Priority Critical-Health&Safety
Council District 1
Status Active
Description
This project will consist of removal and replacement of the existing 20"Cast Iron Pipe(CIP)water transmission line. The new line will be reduced
in diameter as the current line is oversized. The work will also include a crossing under I-37.All work would be conducted in the same project as
Up River Wastewater Force Main project 23038.
Justification
The existing water line installed in 1930 is in poor condition resulting in leaks and failures.
Expenditures FY 2023-2024 to FY 2032-2033
Construction/Rehab 8,000,000
Design 400,000
Eng Admin Reimbursements 440,000
Long-Range Costs -
Total 8,840,000
Funding Sources FY 2023-2024 to FY 2032-2033
Revenue Bonds 8,840,000
TBD -
Total 8,840,000
Budget Impact/Other
An assessment will be done upon completion of project to determine maintenance costs.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# SEQ LR 21
Project Name Water Line Crossing Replacement-SPID,Hwy 286,US-37
Type Improvement/Additions Department Water Department
Useful Life 40 years Contact Director of Water Utilities
Category Water Distribution Priority Critical-Asset Condition/longevity
Council District 1
Status Long-Range
Description
Current waterline crossings of this major roadways require replacement due to age and condition.
Justification
Expenditures FY 2023-2024 to FY 2032-2033
Long-Range Cost 12,000,000
Total 12,000,000
Funding Sources FY 2023-2024 to FY 2032-2033
TBD 12,000,000
Total 12,000,000
Budget Impact/Other
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# 23033
Project Name Water Line Extension to Padre Island
Type Improvement/Additions Department Water Department
Useful Life 40 years Contact Director of Water Utilities
Category Water Distribution Priority Critical-Asset Condition/longevity
Council District 4
Status Active a W-
`�-
Description
The City currently does not have a true redundant water supply source to Padre Island. The line is required to provide a reliable supply for our
customers and is critical as development and growth increases.A previous engineering report was conducted in November 2011 to investigate
options for provide a redundant supply to Padre Island. The first phase of this project will consist of design only.Construction will take place as a
planned long term CIP project.
Justification
The current water lines provides sufficient capacity but do not provide a true redundant supply.Redundancy is essential to this supply line,if a
failure occurs with the current line then the supply to the Island would be insufficient and severely diminished.
Expenditures FY 2023-2024 to FY 2032-2033
Design 3,905,000
Eng Admin Reimbursements 405,000
Long-Range Costs 40,000,000
Total 44,310,000
Funding Sources FY 2023-2024 to FY 2032-2033
Revenue Bonds 4,310,000
TBD 40,000,000
Total 44,310,000
Budget Impact/Other
An assessment will be done upon completion of project to determine maintenance costs.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# 23068
Project Name Water Street Water Line Improvements
Type Improvement/Additions Department Water Department
Useful Life 35 years Contact Director of Water Utilities G
Category Water Distribution Priority Critical-Asset Condition/longevity
Council District 1
Status Active
Description
This project will replace over 4,000 linear feet of a circa 1954,10"cast iron pipe that runs under Water Street from IH 37 to Kinney Ave. The
replacement of this water line would lead to fewer water main failures resulting in improved services,less disruption of daily activities and
enhanced revitalization of the downtown area. This project would be done in conjunction with the wastewater line to provide all new Utility
infrastructure along Water Street.
Justification
This water main serves much of the downtown district and due to its advanced age is prone to failure. These water main failures can be disruptive to
everyday downtown activities,traffic flows and business needs.
Expenditures FY 2023-2024 to FY 2032-2033
Construction/Rehab 5,500,000
Design 550,000
Eng Admin Reimbursements 335,500
Long-Range Costs -
Total 6,385,500
Funding Sources FY 2023-2024 to FY 2032-2033
Revenue Bonds 6,385,500
TBD -
Total 6,385,500
Budget Impact/Other
An assessment will be done upon completion of project to determine maintenance costs.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# LR 23 SEQ LR 23
Project Name Water Line Replacement-N.Chaparral&Mesquite Street
Type Improvement/Additions Department Water Department
Useful Life 40 years Contact Director of Water Utilities
Category Water Distribution Priority Critical-Asset Condition/longevity
Council District 1
Status Long-Range
Description
Project will consist of the replacement of the water line between Chaparral and Mesquite.
Justification
Expenditures FY 2023-2024 to FY 2032-2033
Long-Range Cost 15,000,000
Total 15,000,000
Funding Sources FY 2023-2024 to FY 2032-2033
TBD 15,000,000
Total 15,000,000
Budget Impact/Other
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# LR 24 SEQ LR 24
Project Name Water System Integration Piping for New Water Plant
Type Improvement/Additions Department Water Department
Useful Life 40 years Contact Director of Water Utilities
Category Water Distribution Priority Critical-Asset Condition/longevity
Council District All
Status Long-Range
Description
New water lines required to integrate a new water plant in the system.
Justification
Expenditures FY 2023-2024 to FY 2032-2033
Long-Range Cost 25,000,000
Total 25,000,000
Funding Sources FY 2023-2024 to FY 2032-2033
TBD 25,000,000
Total 25,000,000
Budget Impact/Other
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# LR 25 SEQ LR 25
Project Name Weber Rd.Water Line Replacement
Type Improvement/Additions Department Water Department
Useful Life 40 years Contact Director of Water Utilities
Category Water Distribution Priority Critical-Asset Condition/longevity
Council District 3
Status Long-Range
Description
Replace existing 16"CIP Water Line from Staples to under SPID.
Justification
Expenditures FY 2023-2024 to FY 2032-2033
Long-Range Cost 17,000,000
Total 17,000,000
Funding Sources FY 2023-2024 to FY 2032-2033
TSD 17,000,000
Total 17,000,000
Budget Impact/Other
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# LR 26 SEQ LR 26
Project Name West Broadway Street Water Line Replacement
Type Improvement/Additions Department Water Department
Useful Life 40 years Contact Director of Water Utilities
Category Water Distribution Priority Critical-Asset Condition/longevity
Council District 1
Status Long-Range
Description
Replacement of existing 16"CIP Water Line.
Justification
Expenditures FY 2023-2024 to FY 2032-2033
Long-Range Cost 12,000,000
Total 12,000,000
Funding Sources FY 2023-2024 to FY 2032-2033
TBD 12,000,000
Total 12,000,000
Budget Impact/Other
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project 23026 +a_ �
Project Name CC Water Parking Lot Improvements
Type Improvement/Additions Department Water Department
Useful Life 25 years Contact Director of Water Utilities
Category Site Improvement Priority Critical-Asset Condition/longevity
Council District 1/3
Status Active
Description
This project consists of the rehabilitation and improvements of two large water facility parking lots.First phase will be improvements to the O.N.
Stevens WTP parking area near the filter building. Second phase improvements will be to the utilities building parking lot located on Holly Rd.
Justification
Improve the parking situation and add needed capacity.
Expenditures FY 2023-2024 to FY 2032-2033
Construction/Rehab 210,000
Design 20,000
Eng Admin Reimbursements 20,000
Long-Range Costs -
Total 250,000
Funding Sources FY 2023-2024 to FY 2032-2033
Revenue Bonds 250,000
TBD -
Total 250,000
Budget Impact/Other
An assessment will be done upon completion of project to determine maintenance costs.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# 23080Y
r
Project Name CC Water Warehouse
Type Improvement/Additions Department Water Department
Useful Life 25 years Contact Director of Water Utilities
Category Water Distribution Priority Critical-Asset Condition/longevity .��;.�;
Council District 3 KR
Status Active �,�,
Description
The purpose of this project is to improve Water Utilities handling,inventory and security of various materials used in daily operations.Utilities is
seeking to construct a 30,000 SF warehouse facility that is outfitted with warehouse space,offices,equipment check-out counter,equipment cages,
and maintenance area.Materials such as pipe,fittings,meters,and electronics are currently stored in small portable buildings located at the Utilities
yard or in open air conditions subjecting inventory to harsh environmental conditions and making proper inventory management difficult. The
construction of a new warehouse would allow for the proper stocking levels of all inventory needed to maintain the water distribution system,
minimize the exposure of materials to environmental factors,and increase the controls on management of these materials.
Additional funds will be used for improvements to the current CCW building,electrical,HVAC and back-up generator.
Justification
The proposed expansion will improve the operational capacity of the Utilities Department.
Expenditures FY 2023-2024 to FY 2032-2033
Construction/Rehab 11,200,000
Design -
Eng Admin Reimbursements 800,000
Long-Range Costs -
Total 12,000,000
Funding Sources FY 2023-2024 to FY 2032-2033
Revenue Bonds 12,000,000
TBD -
Total 12,000,000
Budget Impact/Other
An assessment will be done upon completion of project to determine maintenance costs.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# 24001
Project Name Open Storage Yard(CC Water)
Type Improvement/Additions Department Water Department
Useful Life 25 years Contact Director of Water Utilities
Category Water Distribution Priority Critical-Asset Condition/longevity
Council District 3
Status Active
Description
The project will consist of renovation and improvement of the land and space located on Civitan Drive,to enable and open storage yard,where
there will be storage of products,goods or equipment for the water department.
Justification
This project will allow and assist the water department to stage needed equipment and supplies to be proactively preparing and strategizing of
scheduled future projects.
Expenditures FY 2023-2024 to FY 2032-2033
Construction/Rehab 3,400,000
Contingency 80,000
Eng Admin Reimbursements 445,000
Long-Range Costs -
Total 3,925,000
Funding Sources FY 2023-2024 to FY 2032-2033
Revenue Bonds 3,925,000
TBD -
Total 3,925,000
Budget Impact/Other
An assessment will be done upon completion of project to determine maintenance costs.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# 24001 ,r
Project Name Open Storage Yard(CC Water)
Type hnprovement/Additions Department Water Department
Useful Life 25 years Contact Director of Water Utilities -
Category Water Distribution Priority Critical-Asset Condition/longevity
Council District Outside City Limits
Status Active
Description
With this project,the existing restroom/shower facilities will be demolished and replaced with new restroom/shower facilities. The existing
basketball court will also be renovated to like-new condition with new appurtenances,as well as the addition of a new pavilion to accommodate a
designated outdoor activity facility. The new and improved facilities would provide a better experience to sunrise beach visitors and also provide
additional actives to diversify the visiting population.
Justification
These facilities will be updated to meet Texas Accessibility Standards and to provide a higher quality experience to the visitors.
Expenditures FY 2023-2024 to FY 2032-2033
Construction/Rehab 1,500,000
Design 100,000
Eng Admin Reimbursements 160,000
Long-Range Costs -
Total 1,760,000
Funding Sources FY 2023-2024 to FY 2032-2033
Revenue Bonds 1,760,000
TBD -
Total 1,760,000
Budget Impact/Other
An assessment will be done upon completion of project to determine maintenance costs.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# 23051
Project Name Warehouse Facility from Ground Storage Tank
Type hnprovement/Additions Department Water Department
Useful Life 25 years Contact Director of Water Utilities
Category Water Distribution Priority Critical-Asset Condition/longevity
Council District 3
Status Active
Description
The project will consist of the modification of the existing Holly Ground Storage Tank so that it can be utilized for an additional warehouse for the
Utility Department.Construction will consist of design modifications and improvements. The construction will consist of modifying the existing
ground storage tank located at 2901 Holly Road. This tank is not in service and not planned to be utilized as part of the water distribution system
going forward.An engineering feasibility study was conducted by Chuck Anastos and Associates,LLC. The study was submitted March 31,2022.
Justification
The Utilities Department requires additional warehouse space for materials associated with water line and wastewater line repairs. The primary
stored items will consist of piping,valves,and fittings.
Expenditures FY 2023-2024 to FY 2032-2033
Construction/Rehab 2,400,000
Design 192,000
Contingency 240,000
Eng Admin Reimbursements 261,000
Long-Range Costs -
Total 3,093,000
Funding Sources FY 2023-2024 to FY 2032-2033
Revenue Bonds 3,093,000
TBD -
Total 3,093,000
Budget Impact/Other
An assessment will be done upon completion of project to determine maintenance costs.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# 24110
Project Name Wash Rack Water Utilities
Type hnprovement/Additions Department Water Department
Useful Life 25 years Contact Director of Water Utilities n
u s
Category Water Distribution Priority Critical-Asset Condition/longevity
Council District 3
Status Active
Description
The project will consist of the construction of a wash-rack for standard size vehicles and large equipment assigned to Water Utilities.
Construct a(2)bay wash-rack for standard size vehicles and large equipment assigned to Water Utilities complete with a reinforced concrete
driveway,security fence,and vacuum stations.
Justification
The Water department must maintain fleet vehicles which includes periodic washing to prevent premature corrosion and deterioration. The
department currently pays outside privately owned car washes,this alternative will be cost effective and offer convenience to the department.
Expenditures FY 2023-2024 to FY 2032-2033
Construction/Rehab 1,165,000
Design 121,000
Eng Admin Reimbursements 110,000
Long-Range Costs -
Total 1,396,000
Funding Sources FY 2023-2024 to FY 2032-2033
Revenue Bonds 3,093,000
TBD -
Total 3,093,000
Budget Impact/Other
An assessment will be done upon completion of project to determine maintenance costs.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# 21116
Project Name Wesley Seale Boat Ramp and Pier(Sunrise Beach)
Type Improvement/Additions Department Water Department
Useful Life 25 years Contact Director of Water Utilities w �
Category Water Distribution Priority Important-Community Investment
Council District Outside City Limits
Status Active
Description
Sunrise Beach Park is located approximately four miles southwest of Mathis,at the north end of Wesley E. Seale Dam,and includes approximately
one mile of shoreline on Lake Corpus Christi.The park is approximately 27 acres in size and accommodates RV and tent camping as well as day
use activities such as boating,fishing,and swimming.For decades Sunrise Beach Park was operated by private individuals under contract with the
City of Corpus Christi's formerly named Water Department,now Corpus Christi Water.Corpus Christi Water assumed operation of the Park on
January 1,2009,with the intent of upgrading facilities,operations and revenues. The Boat Launch and Dock Buildout project includes the planning
and design for the construction of a new boat ramp and pier at Sunrise Beach. The addition of a boat ramp will allow for a safer boating experience
as well as promote the park and increase revenues.
Justification
This amenity will increase public and visitors to this recreational park.
Expenditures FY 2023-2024 to FY 2032-2033
Construction/Rehab 1,000,000
Design -
Eng Admin Reimbursements 100,000
Long-Range Costs -
Total 1,100,000
Funding Sources FY 2023-2024 to FY 2032-2033
PAYGO -
Revenue Bonds 1,100,000
TBD -
Total 1,100,000
Budget Impact/Other
An assessment will be done upon completion of project to determine maintenance costs.
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# LR 27 SEQ LR 27
Project Name Water Meter Capital Replacement Program
Type Improvement/Additions Department Water Department
Useful Life 40 years Contact Director of Water Utilities
Category Water Distribution Priority Critical-Asset Condition/longevity
Council District City-Wide
Status Long-Range
Description
This project will consist of replacement of water meters that have reached the end of their life cycle.
Justification
Expenditures FY 2023-2024 to FY 2032-2033
Long-Range Cost 30,000,000
Total 30,000,000
Funding Sources FY 2023-2024 to FY 2032-2033
TBD 30,000,000
Total 30,000,000
Budget Impact/Other
Capital Improvement Plan 2024 thru 2033
City of Corpus Christi, Texas
Project# LR 28 SEQ LR 28
Project Name Water Utility Support-Streets projects
Type Improvement/Additions Department Water Department
Useful Life 40 years Contact Director of Water Utilities
Category Water Distribution Priority Critical-Asset Condition/longevity
Council District City-Wide
Status Active
Description
This project will consist of water utility support for street reconstruction as planned and needed for the future term.
Justification
Expenditures FY 2023-2024 to FY 2032-2033
Short-Range Cost 29,236,279
Long-Range Costs 77,000,000
Total 106,236,279
Funding Sources FY 2023-2024 to FY 2032-2033
TBD 106,236,279
Total 106,236,279
Budget Impact/Other
A-2 Proposed Capital Improvement Plan Exhibits
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51 Water Line Crossing Replacement-SPID,Hwy 286,US-37 Ffl
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Project# 5D.7.1
Project Name City of Corpus Christi-ASR Phase I
Type Improvement/Additions
Useful Life 40 years
Category Water Supply
Description
The Corpus Christi Aquifer Storage and Recovery(ASR)Project upcycles treated effluent from the Greenwood Wastewater Treatment Plant
(WWTP)for beneficial non-potable water supply for industries during droughts and/or high seasonal demands. This project includes two phases
(Phase I and 11)based on current WWTP treatment capacity and phased according to industrial growth needs up to 18 MGD.
Phase I includes the construction of 10 wells at the Corpus Christi International Airport site and transmission pipelines needed for recharge,
recovery,and conveyance.Phase I also includes treatment improvements(5 MGD)so that Greenwood WWTP effluent reaches the necessary water
quality for aquifer recharge.Costs are included for secondary treatment improvements(Modified Ludzack-Ettinger(NILE)process)and additional
tertiary processes(Ozone and Biologically Active Filters(BAF)with Microfiltration polishing).
Justification
Potential Project for Future Water Supply
Expenditures FY 2023-2024 to FY 2032-2033
Direct Construction Cost 77,763,772
Studies,Soft Costs,Design,and Contingency 31,165,981
Mobilization(10%) 7,776,377
Bond(5%) 3,888,189
OH&P(10%) 7,776,377
Total 128,370,696
Funding Sources FY 2023-2024 to FY 2032-2033
TBD 128,370,696
Total 128,370,696
Budget Impact/Other
Treatment processes for Greenwood WWTP will be selected based on pilot ,
system results and costs will be adjusted accordingly.
Cost Estimate from:2021 RWP-Table 5D.7.1 (page 403)
Estimated Costs with Ozone+BAF+Microfiltration(High)
Sept 2018 costs adjusted for inflation;$1 in Sept 2018=$1.2143 in 2023
a�s
1-2
14
�J
Coastal Bend Regional Water Plan I October 2020 Coastal Bend Regional
HDR-007003-10028677-275994-011 water Planning Group VII
Aquifer Storage and Recovery[31 TAC§357.34&§357.35]
5D.7 D.7 Aquifer Storage and Recovery (N-7)
5D.7. 1 Description of Strategy
Aquifer Storage and Recovery (ASR) is a process whereby treated water is placed into an
aquifer for storage to be recovered during a later time when needed. Treated water is normally
recharged into the aquifer through well(s). During the recharge and recovery cycles, well
screens placed in productive zones for storage allow water to flow through porous areas of the
aquifer. The stored water is then recovered and used when water supplies are constrained,
such as during drought, periods of high seasonal demands, or water service interruptions.
Monitoring wells are used to help maintain a buffer zone within the aquifer between stored and
native groundwater and manage storage for supply system operations. ASR can be readily
adapted to current infrastructure, delay costly system improvements, and provide supply system
redundancy for reliability.
The City of Corpus Christi, in conjunction with the Corpus Christi Aquifer Storage and Recovery
Conservation District (District), completed a Corpus Christi ASR Feasibility Project in August
2019. The project was partially funded by a grant from the TWDB to study innovative water
solutions to promote long term, cost-effective, reliable water supplies for future growth. The
work included (1) developing a field testing approach (2) conducting an exploratory test drilling
and sampling program (3) performing a geochemical analysis for source and groundwater
compatibility (4) developing a groundwater model and simulating potential ASR operations for
long-term drought and supply augmentation during peaking and (5) evaluating ASR operating
policies for project implementation. The final report is available on the TWDB website'. During
the study, both O.N. Stevens WTP and Greenwood WWTP effluent were evaluated as potential
supplies. Based on City staff directives, it was determined that Greenwood WWTP effluent was
the preferred recharge source due to less competing needs for its use, native groundwater
quality considerations, and more frequent availability for recharge than O.N. Stevens WTP
water. A conceptual ASR schematic is shown in Figure 5D.7.1.
The Corpus Christi ASR project upcycles treated effluent from the Greenwood Wastewater
Treatment Plant (WWTP) for beneficial non-potable water supply for industries during droughts
and/or high seasonal demands. Greenwood WWTP effluent is treated and conditioned prior to
recharge for storage in the brackish Gulf Coast Aquifer System. After multiple cycles, water
quality improves and stored water takes on the characteristics of the recharge water separated
by a buffer zone from native groundwater. Based on exploratory testing results, the most
favorable ASR storage zones are located between 350 and 800 feet below ground surface. The
recovered water quality is anticipated to have total dissolved solids (TDS) and chloride levels
around 2,000 mg/L and 750 mg/L, respectively. Based on water quality needs, reverse osmosis
treatment can be added to reduce TDS and chloride levels.
lhttps://www.twdb.texas.gov/p-Liblications/reports/contracted reports/doc/1600011956_Corpus_Christi_ASR.pdf?d=
1581391239865
513.7-1
Coastal Bend Regional Water Plan I October 2020 Coastal Bend Regional
HDR-007003-10028677-275994-011 water Planning Group
Aquifer Storage and Recovery[31 TAC§357.34&§357.35]
HIGHLY TREATED
EFFLUENT
MONITORING WELL
MOP41IOR114G WELL
AQUIFER BOTTOM
dutet-Fr NA" 5!E
I;ECOVERY CYCLE yk;Nl:: . x;I. ZONE GROUNDWATER
Figure 5D.7.1.
Conceptual ASR Process
For ASR projects, it is important to evaluate source water compatibility with native groundwater
and aquifer minerology to avoid adverse mechanical and chemical processes with project
implementation. The geochemical analysis did not identify any fatal flaws, however pilot testing
of tertiary treatment of WWTP effluent is needed prior to aquifer recharge and monitoring during
pilot testing will be critical in proving up geochemical desk-top analyses prior to full scale project
implementation and remove suspended materials to avoid clogging the fine sand in aquifer
formation for storage. Prior to implementation, a piloting program is needed to verify field tests
and confirm water treatment processes necessary to obtain a TCEQ permit for ASR production,
which requires that the source water for recharge to be treated to a sufficient quality so as to not
impact or impair the aquifer formation or groundwater. The Greenwood WWTP effluent will need
to be improved with additional treatment upgrades to reduce the following constituents in the
existing effluent that could affect operations:
• Total Suspended Solids (TSS)
5D.7-2
Coastal Bend Regional Water Plan I October 2020 Coastal Bend Regional
HDR-007003-10028677-275994-011 water Planning Group
Aquifer Storage and Recovery[31 TAC§357.34&§357.35]
• Nitrate (NO3)
• Total Organic Carbon (TOC)
• Manganese (Mn)
• Bacteria
A field-scale groundwater model was constructed using site-specific data collected during the
exploratory testing program. The model was then used to simulate most likely ASR operational
scenarios2 based on source water availability and future water demands in the vicinity of the
project site to determine yield. During scenario development, it was determined that industrial
water users in the vicinity of the ASR wellfield would be the most likely customers for recovered
water. This determination is based on projected future growth and non-potable needs that could
be met with ASR supplies with minimal to no treatment anticipated after recovery.
5D.7.2 Available Yield
The Corpus Christi Aquifer Storage and Recovery Project is a phased project, with the initial
size based on current Greenwood WWTP capacity and capable of expansion to address
industrial growth by providing up to 18 MGD of new water supply.
Phase I is focused on 10 wells at the Corpus Christi International Airport site and Phase II adds
5 wells to the east of Phase I. A schematic showing transmission pipelines, Phase I and II wells
and associated well field pipeline, and delivery location is shown in Figure 5D.7.2. Phase I and
II operated conjunctively would be capable of providing about 10 MGD from ASR well operation,
and up to 18 MGD with Greenwood WWTP expansion3.
The Phase I and II findings from the Corpus Christi Aquifer Storage and Recovery Feasibility
Project are as follows:
Phase I
➢ Phase I limits recharge to 5 MGD, which is based on current available Greenwood
WWTP capacity after considering existing contracts to provide treated effluent to golf
courses and would be capable of providing up to 8 MGD through recovery at ASR wells.
➢ If tertiary treated Greenwood WWTP effluent by-passes ASR and is delivered concurrent
with ASR recovery, then the combined water supply would be 13 MGD for Phase I.
Phase II
➢ Based on City Staff input, Greenwood WWTP will likely be expanded to 10 MGD by
2030 to 2035. With tertiary treatment expansion to 10 MGD, it is assumed that up to 8
MGD would be available for ASR project and/or delivery to industrial customers.
Based on conversations with City Staff and stakeholders
s Based on City staff feedback, Greenwood WWTP expansion to 12 MGD by Year 2025-2030 would result in about
8 MGD treated effluent available for potential ASR use.
5D.7-3
Coastal Bend Regional Water Plan I October 2020 Coastal Bend Regional
HDR-007003-10028677-275994-011 water Planning Group
Aquifer Storage and Recovery[31 TAC§357.34&§357.35]
➢ Phase I and II operated conjunctively would provide about 10 MGD from ASR well
operation, and up to 18 MGD total by-passed water from Greenwood WWTP
expansion4.
Deb'sry4P int
InJustries) �° r
ASRO
ASR07 M v -
I-70
A SR03 ASR04
I-9
A SR05 ,q5 R0& ASR77
1=8 I-77
A SR
I-3
I-7
A5R13
I-6 ASR07 ASR0S
ASR09
1 ASR•10
1-2
A5R74
I-7
SK A
SR.7 5
a�
SP
�' Greenwood W WiP xc
„
ANAL
Figure 5D.7.2.
Project Layout of the Corpus Christi ASR Feasibility Project(Phase I and ll)
5D.7.3 Environmental Issues
The 2001 Agreed Order includes provisions for 151,000 ac-ft/yr of freshwater inflows to the
Nueces Bay and Estuary System, made up with a combination of 54,000 ac-ft return flow credit
and remaining 97,000 ac-ft from pass-throughs and controlled releases from the CCR/LCC
system according to inflow and stored water levels. The actual wastewater discharges in 2017
and 2018 amounted to 84,663 and 92,327 ac-ft, respectively. It is unlikely that use of Greenwood
WWTP effluent as a source water for ASR will have a meaningful impact on achieving freshwater
inflow requirements associated with the 2001 Agreed Order.
a Based on City staff feedback, Greenwood WWTP expansion to 12 MGD by Year 2025-2030 would result in about
8 MGD treated effluent available for potential ASR use.
5D.7-4
Coastal Bend Regional Water Plan I October 2020 Coastal Bend Regional
HDR-007003-10028677-275994-011 water Planning Group
Aquifer Storage and Recovery[31 TAC§357.34&§357.35]
The most significant environmental issue associated with this project is repurposing Greenwood
WWTP effluent that would otherwise be discharged to Oso Creek. Oso Creek receives treated
domestic wastewater from a number of facilities, one industrial facility, three municipal storm
sewer systems, four concrete production facilities, and three pesticide plants authorized to
discharge. As presented in Table 5D.5.1 (Chapter 5D.5- Reuse), Greenwood WWTP discharged
13,694 ac-ft/yr in 2018. Based on a three year average from January 2015- December 2017, the
discharge from Greenwood WWTP was about 5.5 MGD. This represents about 1.7% of the
recent discharge to Oso Creek from 2015-20175. Oso Creek (Segment 2485A), is listed6 to have
bacteria impairment and water quality concerns of Chlorophyll-a, nitrates, and total P, as shown in
Chapter 1- Planning Area Description Table 1.2. Within the Oso Creek watershed, the most
probable sources of bacteria is regulated stormwater, industrial sources, and nonpoint sources.'
The Texas A&M University at Corpus Christi Center for Coastal Studies and local stakeholders
have formed a group to study Oso Creek and in response, the TCEQ adopted a total maximum
daily load$ (TMDL) for Oso Creek on July 31, 2019 to monitor and reduce bacterial loads in Oso
Creek. The EPA approved the TMDL on October 25, 2019, and is now part of the state's Water
Quality Management Plan. The Texas State Soil and Water Conservation Board is working to
decrease bacterial loads from agriculture by assisting landowners in developing and implementing
water quality management plans. Additional studies are needed to evaluate the environmental
impact of reducing Greenwood WWTP discharge to use as a supply for ASR.
5D.7.4 Engineering and Costing
The ASR project includes two phases (Phase I and II) based on current WWTP treatment
capacity and phased according to industrial growth needs. If tertiary treated Greenwood WWTP
effluent by-passes ASR and is delivered concurrent with ASR recovery, then the combined
water supply would be 13 MGD for Phase I. Phase I and II operated conjunctively would be
capable of providing about 10 MGD from ASR well operation, and up to 18 MGD with
Greenwood WWTP expansion.
The current secondary treatment process at the Greenwood WWTP consists of a conventional,
activated sludge treatment system. The system effectively reduces the biochemical oxygen
demand (BOD) and nitrifies the influent ammonia. However, augmentations to the secondary
treatment system are required to reduce the effluent nitrate (NO3). This process will reduce
NO3 to less than 10 mg/L, the maximum contaminant level (MCL). A Modified Ludzack-Ettinger
(MLE) process is proposed to complete this treatment. To fully treat the wastewater effluent
after the MLE process to sufficient quality to be able to inject it into the aquifer, additional unit
processes will likely be required. The main parameters to be reduced or removed in the tertiary
system are Manganese (Mn), Total Suspended Solids (TSS), Total Organic Carbon (TOC), and
e Table 5. TCEQ, One Total Maximum Daily Load for Indicator Bacteria in Oso Creek,Adopted July 2019.
Nueces River Authority 2019 Basin Highlights Report: San Antonio-Nueces Coastal Basin, Nueces River Basin, Nueces-Rio
Grande Coastal Basin. https://www.nueces-ra.orci/CP/CRP/Pdfs/2019 BHR.Pdf
TCEQ, One Total Maximum Daily Load for Indicator Bacteria in Oso Creek,Adopted July 2019.
s https://www.tceq.texas.�4ov/assets/public/waterduality/tmdl167osocreekbacteria/67-osocreekbacteria.pdf
9 Based on City staff feedback, Greenwood WWTP expansion to 12 MGD by Year 2025-2030 would result in about
8 MGD treated effluent available for potential ASR use.
5D.7-5
Coastal Bend Regional Water Plan I October 2020 Coastal Bend Regional
HDR-007003-10028677-275994-011 water Planning Group
Aquifer Storage and Recovery[31 TAC§357.34&§357.35]
bacteria. Three treatment trains are recommended to be compared during the pilot system
which will inform and direct the Phase I and II project construction and later expansion of the
treatment plant. The proposed pilot plant arrangement is shown in Figure 5D.7.3.
In the absence of pilot system results, the cost analysis considers secondary treatment
improvements and the additional tertiary system considers the following processes:
• Tertiary Membrane Filtration, (TMF or Microfiltration)
• Ozone and Biologically Active Filter (BAF)
• Ozone and BAF with Microfiltration polishing
Microfiltration (TMF)
The standard method for removing suspended particles is typically through a membrane filter.
Microfiltration, or Tertiary Membrane Filtration (TMF), through hollow fiber membranes is an
efficient system to effectively remove particles larger than 1 pm, which includes most bacteria.
The system will use a submerged membrane configuration and be maintained with an air
scouring system with periodic cleaning using acid based cleaners. The physical filtration
mechanism should efficiently remove TSS and bacteria once the MLE system removes NO3.
Microfiltration treatment will likely not sufficiently remove TOC or dissolved Mn.
Ozone and BAF
Biologically active filters (BAF) operate in a similar way as a traditional slow sand filter.
However, a biologically active layer is allowed to develop at the surface of the filter to further
treat organic constituents. Ozone is used as an oxidizer before the filter to breakdown
recalcitrant TOC that was not available to be processed in the secondary treatment. The
biological layer for the BAF will then consume the now biodegradable TOC. An additional
benefit of the configuration is that any remaining Mn is expected to be oxidized and removed.
Potential inefficiencies of the treatment systems is that the bacteria from the biologically active
area may be carried into the effluent and TSS will likely not be sufficiently reduced.
Ozone and BAF with Microfiltration polishing
The combination of the two treatment systems should effectively treat the effluent to a level that
will not significantly impact the aquifer environment. All constituents of concern should be
removed to meet water quality requirements for ASR injection as detailed previously. This
option effectively eliminates individual limitations for the TMF and Ozone/BAF systems.
5D.7-6
O� Coastal Bend Regional Water Plan I March 2020 Coastal oend Regional it
HDR-007003-10028677-275994-011 Water Planning Graup
Aquifer Storage and Recovery(31 TAC§357.34&§357.351
Screen
Aerated Grit PCL AER SCL UV La Volla Creek
Fine Screen
ERA ISRAS
Pilot WAS Reuse
Stream
Grit Classifier
7AF
IR
PCL—Primary Clarifiers
AER—Aerobic Basin ANx Al scI
SCL—Secondary Clarifierscla
UV—Ultraviolet Disinfection
RAS—Return Activated Sludge 8 e
WAS—Waste Activated Sludge ozone OCT e oriuerASR InjectionIR—Internal Recycle ......................................RAS--------- .................
ANX—Anoxic Basin I was
MILE—Modified Ludzack-Ettinger INLE Process(Nil } a
TMF—Tertiary Membrane Filtration
CCT—Contact Chamber Tank
ozone
Pilot Systems
Figure 5D.7.3.
Proposed Pilot System Configuration Process Flow Diagram
5D.7-7
Coastal Bend Regional Water Plan I October 2020 Coastal Bend Regional
HDR-007003-10028677-275994-011 water Planning Group
Aquifer Storage and Recovery[31 TAC§357.34&§357.35]
5D.7.4.1 Phase I Cost Estimate
The Phase I planning-level cost estimate includes:
• 10 wells constructed and equipped to:
o Recharge up to 415 gpm each (total 5.976 MGD, or about 20% extra to account
for well downtime and/or maintenance)
o Recover up to 685 gpm each (total 9.8 MGD, or about 23% to account for well
downtime and/or maintenance)
• 5 MGD pump station at Greenwood WWTP (for recharge)
• 10.9 MGD booster pump station near Phase I wellfield (for recovery)
• 24-inch transmission pipeline from tertiary treatment facilities at Greenwood WWTP to
Phase I well field and 8-inch to 30-inch well field piping
• 30-inch diameter pipe to deliver total Phase I supply produced by 10 wells to a delivery
point located to the north west of the Corpus Christi International Airport on Agnes Road,
south of the intersection of Bronco Road and Interstate Hwy 44
• 2 MG terminal storage tank
• SCADA estimated at 3% of construction costs
• Easement acquisition of 96 acres at cost of$10,000 per acre
• Survey and geotech costs estimated at $55,000 per mile
• Tertiary treatment (5 MGD)
o MLE treatment
o Additional tertiary treatment (low to high)
■ Alternative 2: Ozone + BAF (low)
■ Alternative 3: Ozone + BAF + Microfiltration (high)
• Yields up to 13 MGD during recovery
0 8 MGD through ASR wellfield operation plus
0 5 MGD through bypass from tertiary treatment facilities at Greenwood WWTP.
A cost estimate for Phase I wells and transmission pipelines needed for recharge, recovery, and
conveyance is shown in Table 5D.7.1. The costs shown represent a range of treatment
processes that will be identified during piloting for subsequent refinement of Phase I costs,
accordingly.
The total project cost is expected to range from $68,632,000 to $90,199,000 depending on
treatment process. The annual cost ranges from $6,979,000 to $8,836,000. The unit cost of
water is estimated to be $479 to $606 per ac-ft during recovery, which is the firm yield expected
during drought conditions. After adding recharge operations to replenish storage for later
recovery, the energy costs increase to $1,633,000. The unit cost increases to $537 to $664 per
ac-ft.
5D.7-7-8
FNCoastal Bend Regional Water Plan I October 2020 Coastal Bend Regional 1;;,.,
HDR-007003-10028677-275994-011 water Planning Group "
Aquifer Storage and Recovery[31 TAC§357.34&§357.35]
Table 5D.7.1.
Cost Estimate Summary,
City of Corpus Christi-ASR Phase I(Low to High Range Based on Treatment)
Estimated Costs Estimated Costs
Item with Ozone + with Ozone + BAF +
BAF(Low) Microfiltration (High)
Capital Cost
Greenwood WWTP Pump Station (5 MGD Phase 1) $3,914,000 $3,914,000
Booster Pump Station(s)&Storage Tank(s) (10.9 MGD Phase 1) $3,402,000 $3,402,000
Wellfield Piping (13.4 mi (P1), 8 IN -30 IN dia.) $13,855,000 $13,855,000
ASR Wells (10 wells, 685 gpm, 700 ft depth) $11,653,000 $11,653,000
Terminal Storage Tank (2 MG) $1,516,000 $1,516,000
Tertiary Treatment and MLE Upgrade, 5 MGD $12,018,000 $27,112,000
SCADA $1,171,000 $1,624,000
Total Cost of Facilities $47,529,000 $63,076,000
Engineering and Feasibility Studies, Legal Assistance, Financing, Bond $16,547,000 $21,989,000
Counsel, and Contingencies (30%for pipes&35%for all other facilities)
Environmental&Archaeology Studies and Mitigation $548,000 $548,000
Land Acquisition (96 acres (P1)) $964,000 $964,000
Surveying and Geotechnical (22 miles (P1)) $1,207,000 $1,207,000
Interest During Construction (3%for 1 years with a 0.5% ROI) $1,837,000 $2,415,000
Total Cost of Project $68,632,000 $90,199,000
Annual Cost
Debt Service (3.5 percent, 20 years) $4,829,000 $6,347,000
Operation and Maintenance
Pipeline,Wells, and Storage Tanks (1%of Cost of Facilities) $297,000 $301,000
Intakes and Pump Stations (2.5%of Cost of Facilities) $147,000 $147,000
Tertiary Treatment(Ozone+ BAF) $913,000 $1,248,000
Pumping Energy Costs (@ 0.08$/kW-hr) $793,000 $793,000
Total Annual Cost $6,979,000 $8,836,000
Available Project Yield (acft/yr) 14,573 14,573
Capacity Cost($/gpd) $5.28 $6.94
Annual Cost of Water($ per acft), during recovery $479 $606
Annual Cost of Water After Debt Service ($ per acft), during recovery $148 $171
Annual Cost of Water($ per 1,000 gallons), during recovery 1 $1.471 $1.86
Annual Cost of Water After Debt Service ($ per 1,000 gallons), 1 $0.451 $0.52
5D.7-7-9
Coastal Bend Regional Water Plan I October 2020 Coastal Bend Regional
HDR-007003-10028677-275994-011 water Planning Group
Aquifer Storage and Recovery[31 TAC§357.34&§357.35]
5D.7.4.2 Phase II Cost Estimate
The Phase II planning-level cost estimate includes:
• 15 wells constructed and equipped to:
o Recharge up to 415 gpm each for Phase I wells and 500 gpm for Phase II wells
(total 9.6 MGD, or about 30% for well downtime and/or maintenance)
o Recover up to 685 gpm each for Phase I wells and 750 gpm for Phase 11 wells
(total 15.3 MGD to account for well downtime and/or maintenance)
• 10 MGD pump station at Greenwood WWTP (for recharge)
• 17 MGD booster pump station(s) total
• Phase I pipelines + 12-inch transmission pipeline from tertiary treatment facilities at
Greenwood WWTP to Phase 11 well field and well field piping
• 30-inch diameter pipe to deliver total Phase 11 supply to a delivery point located to the
north west of the Corpus Christi International Airport on Agnes Road, south of the
intersection of Bronco Road and Interstate Hwy 44
• Two- 2 MG terminal storage tanks (4 MG total)
• SCADA estimated at 3% of construction costs
• Land acquisition of 155 acres at cost of$10,000 per acre
• Survey and geotech costs estimated at $55,000 per mile
• Tertiary treatment (10 MGD, total)
o MLE treatment
o Additional tertiary treatment (low to high)
■ Alternative 2: Ozone + BAF (low)
■ Alternative 3: Ozone + BAF + Microfiltration (high)
• Yields up to 18 MGD during recovery
0 10 MGD through ASR wellfield operation plus
0 8 MGD through bypass from tertiary treatment facilities at Greenwood WWTP
after expansion.
A cost estimate for Phase 11 wells and transmission pipelines needed for recharge, recovery,
and conveyance of water to the delivery point for industrial customer use is shown in Table
5D.7.2. Similar to Phase 1, the costs shown represent a range of treatment processes that will
be identified during piloting for subsequent refinement of Phase I costs, accordingly.
The total project cost is expected to range from $123,253,000 to $174,668,000 depending on
treatment process. The annual cost ranges from $12,189,000 to $16,383,000. The unit cost of
water is estimated to be $604 to $812 per ac-ft during recovery, which is the firm yield expected
during drought conditions. After adding recharge operations to replenish storage for later
recovery, the energy costs increase to $1,824,000. The unit cost increases to $646 to $854 per
ac-ft.
5D.7-7-10
FNCoastal Bend Regional Water Plan I October 2020 Coastal Bend Regional 1;;,.,
HDR-007003-10028677-275994-011 water Planning Group "
Aquifer Storage and Recovery[31 TAC§357.34&§357.35]
Table 5D.7.2.
Cost Estimate Summary,
City of Corpus Christi-ASR Phase H(Low to High Range Based on Treatment)
Estimated Costs Estimated Costs
Item with Ozone + with Ozone + BAF +
BAF(Low) Microfiltration (High)
Capital Cost
Greenwood WWTP Pump Station (10 MGD Phase II) $5,689,000 $5,689,000
Booster Pump Station(s)&Storage Tank(16.9 MGD, 500 HP Phase II) $4,778,000 $4,778,000
Wellfield Piping (24.5 mi (P1+2), 8 IN-30 IN dia.) $23,517,000 $23,517,000
ASR Wells (15 wells, 685-750 gpm, 700-800 ft depth) $18,190,000 $18,190,000
Terminal Storage Tank (4 MG) $3,033,000 $3,033,000
Tertiary Treatment and MLE Upgrade, 10 MGD $28,654,000 $64,641,000
SCADA $2,202,000 $3,281,000
Total Cost of Facilities $86,063,000 $123,129,000
Engineering and Feasibility Studies, Legal Assistance, Financing, Bond $29,806,000 $42,779,000
Counsel, and Contingencies (30%for pipes&35%for all other facilities)
Environmental&Archaeology Studies and Mitigation $791,000 $791,000
Land Acquisition (155 acres (P1+P2)) $1,553,000 $1,553,000
Surveying and Geotechnical (32 miles (P1+P2)) $1,741,000 $1,741,000
Interest During Construction (3%for 1 years with a 0.5% ROI) $3,299,000 $4,675,000
Total Cost of Project $123,253,000 $174,668,000
Annual Cost
Debt Service (3.5 percent, 20 years) $8,672,000 $12,290,000
Operation and Maintenance
Pipeline,Wells, and Storage Tanks (1%of Cost of Facilities) $485,000 $496,000
Intakes and Pump Stations (2.5%of Cost of Facilities) $222,000 $222,000
Tertiary Treatment $1,825,000 $2,390,000
Pumping Energy Costs (@ 0.08$/kW-hr) $985,000 $985,000
Total Annual Cost $12,189,000 $16,383,000
Available Project Yield (acft/yr) 20,178 20,178
Capacity Cost($/gpd) $6.84 $9.70
Annual Cost of Water($ per acft), during recovery $604 $812
Annual Cost of Water After Debt Service ($ per acft), during recovery $174 $203
Annual Cost of Water($ per 1,000 gallons), during recovery $1.85 $2.49
Annual Cost of Water After Debt Service ($ per 1,000 gal), recovery $0.53 $0.62
5D.7-7-11
Coastal Bend Regional Water Plan I October 2020 Coastal Bend Regional
HDR-007003-10028677-275994-011 water Planning Group
Aquifer Storage and Recovery[31 TAC§357.34&§357.35]
5D.7.5 Implementation Issues
The state rules governing most facets of ASR project implementation in Texas are administered
by the Texas Commission on Environmental Quality (TCEQ) and are contained in Title 30 of the
Texas Administrative Code (30 TAC), Chapter 331, Underground Injection Control (UIC). The
TCEQ has primacy from the US EPA to regulate most injection wells through the Texas UIC
Program. Since the proposed ASR project does not currently contemplate recovery of water
directly to a public water system, rules related to public supply wells and groundwater sources
and development, as contained in 30 TAC §290.41 (c), do not apply. Of particular relevance to
the proposed ASR project are the requirements in 30 TAC§331.186 (a), which outlines the
criteria to be consider by TCEQ in authorizing ASR operations. The effluent from the
Greenwood WWTP does not currently meet drinking water standards for chloride, TDS,
manganese, and nitrate concentration, or pathogen removal. While it is anticipated that nitrate
and manganese will likely be below the drinking water maximum contaminant limit after tertiary
treatment, the other parameters will not be significantly altered prior to recharge. As such, the
City will need to demonstrate to the TCEQ that proposed ASR well operations will not: 1) render
the groundwater produced from the receiving formation harmful or detrimental to people,
animals, vegetation, or property, or 2) require an unreasonably higher level of treatment of the
groundwater produced from the receiving geologic formation than is necessary for the native
groundwater in order to render the groundwater suitable for beneficial use.
For most previous ASR applications, TCEQ has required treatment to drinking water standards
prior to recharge but newer rules passed in 2015 and described in Section 5 of Exhibit G may
give some flexibility since both the quality of the effluent relative to drinking water is considered
along with the potential to degrade the native groundwater. This project would improve the
native groundwater for constituents more relevant to Safe Drinking Water Act as a result of the
tertiary treatment prior to injection that address the constituents above MCL. Although the
storage aquifer is considered brackish it would still be classified as an underground source of
drinking water (USDW) per Title 40, Code of Federal Regulations (40 CFR) Section 144.3. It is
likely that additional treatment at the WWTP may be required by TCEQ to meet MCLs, and
could be necessary to maintain ASR operations and water compatibility. Treatment may include
modifications to the WWTP's treatment process to promote de-nitrification, reduce turbidity, and
improve the disinfection system to further inactivate bacteria.
There are several existing wells identified within the ASR study area that will likely be impacted
by ASR implementation. Additional efforts to survey unregistered wells in the vicinity of the
proposed ASR well field area would be helpful to identify wells to monitor and/or mitigate in
advance of commencing ASR operations. Supply protection is within the jurisdictional authority
of the District as detailed in the District's 2019 Groundwater Management Plano
to http://www.twdb.texas.gov/groundwater/docs/GCD/ccasrcd/CCASRCDMe�mtPlan2Ol9.pdpd=1581392749650
513.7-7-12
FNCoastal Bend Regional Water Plan I October 2020 Coastal Bend Regional I;;,,
HDR-007003-10028677-275994-011 water Planning Group
Aquifer Storage and Recovery[31 TAC§357.34&§357.35]
5D.7.6 Evaluation Summary
An evaluation summary of this water management option is provided in Table 5D.7.3.
Table 5D.7.3.
Evaluation Summary of City of Corpus Christi ASR Project
Impact Category Comment(s)
a. Water Supply
1 Quantity 1. Firm Yield: 14,573 ac-ft/yr(Phase 1)and 20,178 ac-ft/yr
(Phase 11)
2. Reliability 2. Reliable, based on system operations
3. Cost of Treated Water 3. Non-Potable cost: $479-$606 per ac-ft (Phase 1)and
$604-$812 per ac-ft(Phase 11)
b. Environmental factors
1. Instream flows 1. Low impact. Reduced flow in Oso Creek.
2. Bay and Estuary Inflows and arms of the 2. None or low impact.
Gulf of Mexico
3. Wildlife Habitat 3. None or low impact.
4. Wetlands 4. None or low impact.
5. Threatened and Endangered Species 5. None.
6. Cultural Resources 6. No cultural resources affected.
7. Water Quality 7.
a. dissolved solids a. Dissolved solids are estimated to be around 2,000
b. salinity mg/L for non-potable use. If water use needed is
c. bacteria potable, additional treatment will be required.
d. chlorides b. Salinity are addressed for non-potable use. If
e. bromide water use needed is potable, additional treatment
f. sulfate will be required.
g. uranium C. Bacteria is addressed with treatment process.
h. arsenic d. Chlorides are estimated to be around 750 mg/L for
i. other water quality constituents non-potable use. If water use needed is potable,
additional treatment will be required.
e-h. None or low impact
i. Nitrate, TSS, TOC, and Mn addressed with
treatment processes.
c. Impacts to agricultural resources and State 0 Reduce discharge to Oso Creek.
water resources
d. Threats to agriculture and natural resources in None
region
e. Recreational impacts 0 None
f. Equitable Comparison of Strategies 0 Standard analyses and methods used
g. Interbasin transfers 0 None
h. Third party social and economic impacts from Reduce discharge to Oso Creek.
voluntary redistribution of water
i. Efficient use of existing water supplies and Reuses water supply and compatible with regional
regional opportunities development.
j. Effect on navigation None
k. Impacts on water pipelines and other facilities None
used for water conveyance
5D.7-7-13
2021 Region N Water Plan NOT RECOMMENDED AT THIS TIME
Project# 5D.8.2
Project Name Evangeline/Laguna Treated Groundwater Project
Type Improvement/Additions
Useful Life 40 years
Category Water Supply
Description
The Evangeline/Laguna LP Groundwater Project includes groundwater production of up to 25.4 MGD(28,486 acft/yr)from 23,000+acres located
in San Patricio County for conveyance and delivery to the City of Corpus Christi and/or future industries in San Patricio County.
This project will be phased based on current modeled available groundwater(MAG)limitations,with full well field build-out after 2050. The first
phase is a well field with 13 wells,but at full project production,the wellfield consists of 18 wells including contingency.
Three raw water delivery options are being considered for the project.Costs are included for the most expensive option(Delivery Option 1).
Justification
Potential Project for Future Water Supply
Expenditures FY 2023-2024 to FY 2032-2033
Direct Construction Cost 77,763,772
Studies,Soft Costs,Design,and Contingency 42,510,214
Mobilization(10%) 7,776,377
Bond(5%) 3,888,189
OH&P(10%) 7,776,377
Total 139,714,929
Funding Sources FY 2023-2024 to FY 2032-2033
TBD 139,714,929
Total 139,714,929
Budget Impact/Other
Project cost is subject to change depending on the selected raw BEE / /�
�P e Yom( �' vangNnelaguna LP
water delivery option.
RE FUGIO
Cost Estimate from:2021 RWP-Table 5D.8.29(page 456)
Estimated Costs for Facilities
(Delivery Option 1)
^
Sept 2018 costs adjusted for inflation, �^P^
$1 in Sept 2018=$1.2143 in 2023 Z Z "R""s°'
SAN\ o
P°mo Raooa s„a \rn
PATRIC10
'\ A
Rn E Fn
Coastal Bend Regional Water Plan I October 2020 ,.oasts Bend Reg o,w
HDR-007003-10028677-275994-015
Gulf Coast Aquifer Supplies[31 TAC§357.34&§357.35]
5D.8.2 Evangeline/Laguna LP Raw Groundwater Project
5D.8.2.1 Description of Strategy
The Evangeline/Laguna LP Groundwater Project includes groundwater production of up to 25.4
MGD (28,486 acft/yr) from 23,000+ acres located in San Patricio County for conveyance and
delivery to the City of Corpus Christi and/or future industries in San Patricio County. Figure
5D.8.1 shows the approximate location of the project site. Since the 2016 Plan, project
developers have moved this project towards implementation by securing permits from the San
Patricio County Groundwater Conservation District (SPCGCD), drilling and collecting data from
a test well, and performing a corrosion analysis, but no blending analysis has been conducted
yet. The test well water quality results were all within TCEQ drinking water standards. TDS and
chloride levels measured at the test well were 792 mg/L and 269 mg/L, respectively. The
SPCGCD production permit granted to Evangeline/Laguna LP is for up to 25.4 MGD (28,486
acft/yr), the current modeled available groundwater (MAG) for regional planning purposes limits
groundwater production in San Patricio County to 24,873 acft/yr in Year 2020. However, in
Year 2050, the full groundwater production equal to the 25.4 MGD permit issued by the
SPCGCD is available under regional planning guidelines.
This project has been evaluated in two ways for the 2021 Region N Plan: (a) as a raw,
groundwater supply with minimal treatment and (b) with groundwater desalination to reduce
TDS and chlorides to around 200 mg/L for high water quality use (Chapter 5D.9). The strategy
presented here is for the raw, groundwater supply with minimal treatment options based
on the water quality results provided by Evangeline/Laguna LP that shows water quality
results within TCEQ drinking water standards.
This project will be phased based on MAG limitations, with full well field build-out after 2050 as
described above. The first phase is a well field with 13 wells (production constrained by MAG),
but at full project production, the wellfield consists of 18 wells including contingency. The wells
will be around 1,000 ft and have an estimated pumping rate of 1,200 gpm. The current raw
groundwater quality is around 800 mg/L TDS, and wells would be screened and operated in
such a manner to target groundwater with lower levels of TDS and chlorides. Based on test well
data water quality meets drinking water standards and could be delivered to a customer
untreated or with minimal chlorine treatment.
Three delivery options were evaluated as part of this water management strategy and the costs
are provided in the Engineering and Costing Section.
5D.8-34
Coastal Bend Regional Water Plan I October 2020 Coastal Bend Regional _A,�,,�6„•
HDR-007003-10028677-275994-015 Water Planning Group
Gulf Coast Aquifer Supplies[31 TAC§357.34&§357.35]
8 E E 2 Mary Rhodes ~ ...
18 t C Pipeline �j Evangeline-Laguna LP
3 Groundwater Project
C C 4 REFUG10
77 EWangeJiue C 5 rim ARti ra-"• „J ti
C Laguna -
s� 16 Projed'Ama 6 C 1 4
\ G g�� G Legend
5t 75 C' Proposed
WSC W Well C 10 Bayside'
74 72 � Desalination Plant C 11C _ C Epsting Wells
City Of 73 C Concentrate Disposal: �� t C Proposed Wells
Sinton YIePI
� Chiltipin Creek , �;. �, Delivery
Proposed �,r. � _ Options
K Desalination \ Options
City of Sinton f ARANSAS —Option2
" WWFP = Option3
Sinton ' -�' _Pipeline
Connections
i{ SAH PAT2ICItJ 1 Evangeline-
_ -� Laguna Pro-ject
Future SPMYVD
Pump Station Site Mary Rhodes
7F
m �
e.Taft— •� P ip el in e
H z,.
9 Od he
N
E Gr- my Near San Patrieio
Municipal a ' 2
Ylbter District
Complex
Aransas 11M2019
rr _ Pass/
Portland y
Ingleside`
r ,
Corpu -_Ingleside
Christi Dn the Bay
q _
Figure 5D.8.1.
Location of Conceptual Layout of Evangeline/Laguna LP Groundwater Project
5D.8.2.2 Available Yield
In the Coastal Bend region, the Gulf Coast Aquifer System is the primary source of substantial
groundwater supplies. The most productive water-bearing zone is the Goliad Sand, which is also
known as the Evangeline Aquifer. The outcrop of the Goliad Sand is about 50 to 75 miles inland.
The formation dips toward the coast at about 20 feet per mile. Near the coast, the shallower
Chicot Aquifer provides some groundwater supplies. West of the outcrop of the Goliad Sands, the
deeper Jasper Aquifer can supply a moderate amount of groundwater in some areas.
The SPCGCD production permit granted to Evangeline/Laguna LP is for up to 25.4 MGD
(28,486 acft/yr), the current modeled available groundwater (MAG) for regional planning
purposes limits groundwater production in San Patricio County to 24,873 acft/yr in Year 2020.
However, in Year 2050, the full groundwater production equal to the 25.4 MGD permit issued by
the SPCGCD is available under regional planning guidelines.
5D.8-35
Coastal Bend Regional Water Plan I October 2020 ,.pasta Bend Reg ora
HDR-007003-10028677-275994-015 AWer Pcirninra G oup
Gulf Coast Aquifer Supplies[31 TAC§357.34&§357.35]
5D.8.2.3 Environmental Issues
The primary environmental issues related to the development of raw groundwater from the
Evangeline Aquifer in San Patricio County are the development of the well fields and associated
pipelines, and integration into the pipeline system for conveyance and delivery.
The project is located in the Gulf Coastal Plains of Texas Physiographic Province, specifically in
the subprovince of the Coastal Prairies. This area is locally characterized as a nearly flat prairie
composed of deltaic sands and muds which terminates at the Gulf of Mexico and includes
topography changes of less than one foot per mile. Elevation levels in the Coastal Prairies
range from 0 to 300 feet above mean sea level.
Environmental Considerations Associated with Evangeline-Laguna LP Groundwater
Project
The Evangeline-Laguna LP Groundwater project includes a well field of 18 water wells located
in San Patricio County near its border with Bee County. For this strategy, water would be
minimally treated and delivered to the City of Corpus Christi and/or to San Patricio Municipal
Water District for future industries in San Patricio County.
Three delivery pipeline options are proposed. The proposed transmission pipelines cross areas
which are primarily used for pasture and crops. Vegetation types found along the pipeline route
also include areas of Mesquite-Live Oak-Bluewood Parks. Planning of the pipeline route should
include avoidance of impacts to wetland areas where possible. Although the construction of
portions of the treated water pipeline may include the clearing and removal of woody vegetation,
destruction of potential habitat can generally be avoided by diverting the corridor through
previously disturbed areas.
The well field area is primarily located within an area used for crops; however, it also contains
smaller portions of Mesquite-Live Oak-Bluewood Parks vegetation areas. Mesquite-Live Oak-
Bluewood Parks areas commonly contain plants such as huisache, grajeno, lotebush,
pricklypear, agarita, purple threeawn, and Mexican persimmon. Distribution of this vegetation
type is found primarily within the South Texas Plains. Site selection for the wells should include
the avoidance of impacts to wetland areas.
Appropriate pipeline route selection, construction methods and right-of-way selection should
avoid or minimize anticipated impacts to potential wetland areas or other waters of the U.S.
along the three treated water pipeline options.
Area Vegetation and Wildlife Habitat
The groundwater project area is located within the Gulf Prairies and Marshes Vegetational Area.
Gulf Prairies have slow surface drainage and elevations that range from sea level to 250 feet.
These areas include nearly level and virtually undissected plains. Originally the Gulf Prairies
were composed of tallgrass prairie and post oak savannah. However tree species such as
honey mesquite, and acacia, along with other trees and shrubs have increased in this area
forming dense thickets in many places. Typical oak species found in this area include live oak
5D.8-36
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(Quercus virginiana) and post oak (Q. stellata), in addition to huisache (Acacia smallii), black-
brush (A. rigidula), and a dwarf shrub; bushy sea-ox-eye (Borrichia frutescens). Principal climax
grasses of the Gulf Prairies include gulf cordgrass (Spartina spartinae), indiangrass
(Sorghastrum nutans), and big bluestem (Andropogon gerardii var. gerardii). Prickleypear
(Opunita sp.) are common within this area along with forbs including asters (Aster sp.), poppy
mallows (Callirhoe sp.), bluebonnets (Lupinus sp.), and evening primroses (Oenothera sp.).
Gulf Marshes range from sea level to a few feet in elevation, and include low, wet marshy coast
areas commonly covered with saline water. These salty areas support numerous species of
sedges (Carex and Cyperus sp.), bulrushes (Scirpus sp.), rushes (Juncus sp.), and grasses.
Aquatic forbs found in these areas generally include pepperweeds (Lepidium sp.), smartweeds
(Polygonum sp.), cattails (Typha domingensis) and spiderworts (Tradescantia sp.) among
others. Game and waterfowl find these low marshy areas to be excellent natural wildlife habitat.
Threatened and Endangered Species (ES)
The Federal Endangered Species Act of 1973, as amended, prohibits the "take" of any
threatened or endangered species. The term "take" under the ESA means "to harass, harm,
pursue, hunt, shoot, wound, kill, trap, capture, or collect, or attempt to engage in any such
conduct." The term "harm" was further defined to include "significant habitat modification or
degradation where it actually kills or injures wildlife by significantly impairing essential
behavioral patterns, including breeding, feeding or sheltering." Designation of critical habitat
areas has been established for the public knowledge where the publishing of such information
would not cause harm to the species. Additional federal protection is extended to migratory
birds, and bald and golden eagles under the Migratory Bird Treaty Act (MBTA) as amended,
and the Bald and Golden Eagle Protection Act. Protection is also afforded to Texas state-listed
species. The Texas Parks and Wildlife Department (TPWD) enforces the state regulations.
The MBTA protects most bird species, including, but not limited to, cranes, ducks, geese, shore-
birds, hawks, and songbirds. Migratory bird pathways, stopover habitats, wintering areas, and
breeding areas may occur within and adjacent to the pipeline area, and may be associated with
wetlands, ponds, shorelines, riparian corridors, fallow fields and grasslands, and woodland and
forested areas. Pipeline construction activities could disturb migratory bird habitats and/or
species' activities.
Reasonable and prudent measures should be taken to avoid and minimize the potential effects
of the proposed project's activities on threatened and endangered species, as well as bald
eagles. Species' locations, activities, and habitat requirements should be considered based on
U.S. Fish and Wildlife Service and TPWD recommendations.
In San Patricio County there may occur 40 state-listed endangered or threatened species and
19 federally-listed endangered or threatened wildlife species, according to the county lists of
rare species published by the TPWD. A list of these species, their preferred habitat and
potential occurrence in the four county areas is provided in Table 5D.8.28.
5D.8-37
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Table 5D.8.28.
Federal- and State-Listed Threatened, Endangered, and Species of Concern
Listed for San Patricio County
Potential Federal State
Common Name Scientific Name Summary of Habitat Preference Occurrence in Status Status
Project Area
Black-spotted Notophthalmus May be found in resacas and
newt meridionalis bodies of water with firm bottoms Resident -- T
and little or no vegetation.
Sheep frog Hypopachus Predominantly grassland and Resident -- T
variolosus savanna.
Mainly found in bodies of quiet
South Texas siren Siren sp. 1 water, permanent or temporary, Resident -- T
(large form) with or without submerged
vegetation.
Strecker's chorus Wooded floodplains and flats,
frog Pseudacris strecked prairies, cultivated fields and Resident -- --
marshes.
Haliaeetus Found primarily near rivers and
Bald eagle leucocephalus large lakes, nests in tall trees or Resident -- T
on cliffs near water.
Salt, brackish, and freshwater
Black rail Laterallus jamaicensis marshes, pond borders, wet Nesting PT --
meadows and grassy swamps.
Botteri's sparrow Peucaea botterii Habitat description is not available Resident -- T
at this time.
Eskimo Curlew Numenius borealis Nonbreeding in grasslands, Historic LE E
pastures and plowed fields
Franklin's gull Leucophaeus pipixcan Habitat description is not available Migrant — —
at this time.
Mountain plover Charadrius montanus Breeding, nesting on shortgrass Resident — —
prairie
Open country, especially savanna
and open woodland, and
Northern Falco femoralis sometimes in very barren areas; Migrant LE E
Aplomado Falcon septentrionalis grassy plains and valleys with
scattered mesquite, yucca, and
cactus
Piping plover Charadrius melodus Beaches and flats of coastal Migrant LT T
Texas
Primarily sea coast on tidal flats
Red knot Calidris canutus rufa and beaches, herbaceous Resident LT --
wetland, and tidal flat/shore.
Lowland forested regions,
Swallow-tailed kite Elanoides forficatus especially swampy areas, ranging Resident — T
into open woodland.
Grassland and short-grass plains
Texas Botteri's Aimophila botterii with scattered bushes or shrubs,
Sparrow texana sagebrush, mesquite, or yucca; Resident — T
nests on ground of low clump of
grasses
Tropical kingbird Tyrannus Habitat description is not available Resident -- --
melancholicus at this time
Tropical parula Setophaga pitiayumi Semi-tropical evergreen woodland Resident -- T
along rivers and resacas
Western Athene cunicularia Open grasslands, especially Resident
burrowing owl hypugaea prairie — —
5D.8-38
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Potential Federal State
Common Name Scientific Name Summary of Habitat Preference Occurrence in Status Status
Project Area
White-faced ibis Plegadis chihi Prefers freshwater marshes Resident _ T
White-tailed hawk Buteo albicaudatus Coastal prairies, savannahs and Nesting/Migrant T
marshes in Gulf Coastal Plain —
Whooping crane Grus Americana Winters in coastal marshes Migrant LE E
Forages in prairie ponds, ditches
Wood stork Mycteria Americana and shallow standing water; Migrant — T
formerly nested in Texas
Brooding adults found in fresh or
Opossum pipefish Microphis brachyurus low salinity waters and young Aquatic T
move or are carried into more Resident
saline waters after birth.
Snook Centropomus Habitat description is not available Aquatic
undecimalis at this time Resident
Southern flounder Paralichthys Habitat description is not available Aquatic
lethostigma at this time Resident
American Bombus Habitat description is not available Resident -- --
bumblebee pensylvanicus at this time
Manfreda giant- Most skippers are small and stout-
skipper Stallingsia maculosus bodied; name derives from fast, Resident — —
erratic flight
No accepted Disonycha Habitat description is not available Resident
common name stenosticha at this time —No accepted Dacoderus steined Habitat description is not available Resident
common name at this time
No accepted Cryptocephalus Habitat description is not available Resident
common name downiei at this time —No accepted Ormiscus Habitat description is not available Resident
common name albofasciatus at this time —No accepted Ceophengus pallidus Habitat description is not available Resident
common name at this time — —
American badger Taxidea taxus Habitat description is not available Resident — —
at this time
Roosts in crevices and cracks in
Big free-tailed bat Nyctinomops macrotis high canyon walls, but will use Resident -- --
buildings as well.
Colonial and cave dwelling, also
Cave myotis bat Myotis velifer roosts in rock crevices, old Resident -- --
buildings, carports, and under
bridges
Found in a variety of habitats in
Eastern red bat Lasiurus borealis Texas. Usually associated with Resident -- --
wooded areas.
Eastern spotted Catholic, open fields, prairies,
skunk Spilogale putorius croplands, fence rows, farmyards, Resident -- --
forest edges, and woodlands
Known from montane and riparian
Hoary bat Lasiurus cinereus woodland in Trans-Pecos, forest Resident --and woods in east central Texas.
Megaptera Open ocean and coastal waters,
Humpback whale novaeangliae sometimes including inshore areas Ocean Resident LE E
such as bays.
5D.8-39
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Potential Federal State
Common Name Scientific Name Summary of Habitat Preference Occurrence in Status Status
Project Area
Brushlands, fence rows, upland
Long-tailed Mustela frenata woods and bottomland Resident -- --
weasel hardwoods, forest edges, and
rocky desert scrub
Maritime pocket Geomys personatus Fossorial in deep sandy soils. Resident -- --
gopher maritimus
Mexican free- Tadarida brasiliensis Found in all habitats, forest to Resident -- --
tailed bat desert.
Mountain lion Puma concolor Rugged mountains and riparian Resident -- --
zones
Dense chaparral thickets;
Ocelot Leopardus pardalis mesquite-thorn shrub and live oak Resident LE E
stands
Plains spotted Spilogale putorius Open fields, and prairies Resident
skunk interrupta — —
Southern yellow Lasiurus ega Associated with trees, such as Resident T
bat palm trees —
Swamp rabbit Sylvilagus aquaticus Habitat description is not available Resident --at this time.
Forest, woodland, and riparian
Tricolored bat Perimyotis subflavus areas are important. Caves are Resident -- --
very important
Western hog- Conepatus leuconotus Woodlands, grasslands, and Resident -- --
nosed skunk deserts to 7,200 feet.
White-nosed coati Nasua narica Woodlands, riparian corridors and Transient T
canyons —
Golden Orb Quadrula aurea Sand/gravel areas in river basins Resident C T
No accepted Praticolella candida Habitat description is not available Resident -- --
common name at this time
g Alligator Coastal marshes, inland natural
American alligator mississippiensis rivers and marshes, manmade Resident -- --
impoundments
Atlantic hawksbill Eretmochelys Gulf and bay system,warm Aquatic
sea turtle imbricata shallow waters especially in rocky Resident LE E
marine environments
Irrigation canals and riparian-
corridor farmlands in west.
Common garter Thamnophis sirtalis Marshy, flooded pastureland, Resident -- --
snake grassy or brushy borders of
permanent bodies of water,
coastal salt marshes.
Eastern box turtle Terrapene carolina Forests, fields, forest-brush and Resident -- --
forest-field ecotones.
Green sea turtle Chelonia mydas Gulf and bay systems; shallow Aquatic LT T
water seagrass beds Resident
Coastal dunes, barrier islands,
Keeled earless Holbrookia propinqua and other sandy areas; eats Resident
lizard insects and likely other small — —
invertebrates
Gulf and bay systems for
Loggerhead sea Caretta caretta juveniles, adults prefer open Aquatic LT T
turtle waters Resident
5D.8-40
FNCoastal Bend Regional Water Plan I October 2020 Coastal Bend Regional
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Potential Federal State
Common Name Scientific Name Summary of Habitat Preference Occurrence in Status Status
Project Area
Quite common in gently rolling
Massasauga Sistrurus tergeminus prairie occasionally broken by Resident -- --
creek valley or rocky hillside.
Northern scarlet Cemophora coccinea Along Gulf Coast, known from
snake coped mixed hardwood scrub on sandy Resident -- T
soils.
Open grassland, prairie, woodland
Slender glass Ophisaurus edge, open woodland, oak
lizard attenuatus savannas, longleaf pine flatwoods, Resident -- --
scrubby areas, fallow fields, and
areas near streams and ponds.
Southern spot- Holbrookia lacerata Habitat description is not available
tailed earless subcaudalis at this time. Resident -- --
lizard
Spot-tailed earless Holbrookia lacerate Open prairie-brushland Resident
lizard — —
Texas Malaclemys terrapin
diamondback littoralis Coastal marshes and tidal flats Resident — —
terrapin
Texas horned Phrynosoma Varied; sparsely vegetated Resident T
lizard cornutum uplands, grass, cactus, brush —
Thornbrush-chapparal woodland
Texas Indigo Drymarchon of south Texas, in particular dense Resident -- T
snake melanurus erebennus riparian corridors. Can do well in
suburban and irrigated croplands.
Texas scarlet Cemophora coccinea Mixed hardwood scrub on sandy Resident T
snake linen soils —
Open bush with grass understory;
Texas tortoise Gopherus berlandied open grass and bare ground Resident — T
avoided
Timber/Canebrake Crotalus horridus Floodplains, riparian zones with Resident T
rattlesnake dense ground cover —
Western box turtle Terrapene ornate Prairie grassland, pasture, fields, Resident -- --
sandhills, and open woodland.
Arrowleaf milkvine Matelea sagittifolia Most consistently encountered in Resident -- --
thronscrub in south Texas.
Billie's bitterweed Tetraneuris turned Grasslands on shallow sandy soils Resident --and caliche outcrops.
Coastal gay- Liatris bracteata Endemic to black clay soils of Resident
feather prairie — —
Occurs on poorly drained sites on
Crestless onion Allium canadense var. sandy substrates within coastal Resident -- --
ecristatum prairies of the Coastal Bend area
(Carr 2015)
Occurs in sparsely vegetated
Croft's bluet Houstonia croftiae areas in grasslands or among Resident -- --
shrubs (Carr 2015)
Drummond's Caesalpinia Open areas on sandy clay. Resident -- --
rushpea drummondii
Elmendorf's onion Allium elmendorfii Endemic to grassland openings in Resident
woodlands — —
Greenman's bluet Houstonia parviflora Habitat description is not available Resident --at this time.
5D.8-41
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Potential Federal State
Common Name Scientific Name Summary of Habitat Preference Occurrence in Status Status
Project Area
Indianola Rhynchospora Locally abundant in cattle pastures
beakrush indianolensis in some areas (at least during wet Resident -- --
years).
Jone's rainlilly Cooperia jonesii Habitat description is not available Resident --at this time.
Large selenia Selenia grandis Occurs in seasonally wet clayey Resident -- --
soils in open areas.
Shrubs or in grassy openings in
Lila de los Llanos Echeandia chandlers subtropical thorn shrublands along Resident
Gulf Coast
Occurs in a variety of vernally-
Low spurge Euphorbia peplidion moist situations in a number of Resident -- --
natural regions.
Net-leaf Desmanthus Mostly on clay prairies of the
bundleflower reticulatus coastal plain of central and south Resident -- --
Texas.
Plains gumweed Grindelia oolepis Coastal prairies on heavy clay Resident
soils
Occurs on deep heavy black clay
soils or sandy loams in swales or
Refugio rainlily Zephyranthes drainages on herbaceous Resident -- --
refugiensis grasslands or shrublands on level
to rolling landscapes underlain by
the Lissie Formation.
Sand Brazos mint Brazoria arenaria Sandy areas in South Texas. Resident -- --
Seaside beebalm Monarda maritima Occurs in grasslands and pastures Resident --on sandy soil near the coast.
South Texas false Pseudognaphalium Habitat description is not available Resident -- --
cudweed austrotexanum at this time.
South Texas Eleocharis Occurring in miscellaneous
spikesedge austrotexana wetlands at scattered locations on Resident --the coastal plain.
South Texas Polanisia erosa ssp. Habitat description is not available
yellow Breviglandulosa at this time. Resident -- --
clammyweed
Occurs at scattered sites in
Texsa peachbush Prunus texana various well drained sandy Resident -- --
situations.
Found in shrublands on clay
dunes(lomas)at the mouth of the
Texas stonecrop Lenophyllum texanum Rio Grande and on calcareous Resident -- --
rock outcrops at scattered inland
sites.
Mostly in sparsely vegetated
Texas wilkommia Wilkommia texana patches within taller prairies on Resident -- --
var. texana alkaline or saline soils on the
Coastal Plain (Carr 2015)
Texas windmill- Texas endemic; sandy to sandy
Chloris texensis loam soils in bare areas in coastal Resident
grass prairie grassland remnants
Occurs on barrier islands, shores
Tharp's dropseed Sporobolus tharpii of lagoons and bays protected by Resident --the barrier islands, and on shores
of a few near-coastal ponds.
5D.8-42
FNCoastal Bend Regional Water Plan I October 2020 Coastal Bend Regional
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Potential Federal State
Common Name Scientific Name Summary of Habitat Preference Occurrence in Status Status
Project Area
Three-flower Thurovia triflora Endemic, remnant grasslands and Resident
broomweed tidal flats — —
Parasitic on various Quercus,
Juglans, Rhus, Vitis, Ulmus, and
Tree dodder Cuscuta exaltata Diospyros species as well as Resident -- --
Acacia berlandieri and other
woody plants.
Open or brushy areas on coastal
Velvet spurge Euphorbia innocua sands and the south Texas Sand Resident -- --
Sheet.
Grasslands, varying from
Welder Psilactia heterocarpa midgrass coastal prairies, and Resident -- --
machaeranthera open mesquite-huisache
woodlands.
Wright's Trichocoronis wrightii Most records from Texas are Historic
trichocoronis var. wrightii historical. Resident
Source: TPWD, Annotated County List of Rare Species, San Patricio County, July 17, 2019.
PT Proposed Threatened LE Federally listed endangered
LT Federally listed threatened -- Not Listed (Species of Concern)
E State Endangered T State Threatened
5D.8-43
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Gulf Coast Aquifer Supplies[31 TAC§357.34&§357.35]
Inclusion in Table 5D.8.28 does not imply that a species will occur within the project area, but
only acknowledges the potential for occurrence in the project area county. A more intensive
field reconnaissance is necessary to confirm and identify specific species habitat that may be
present in the project area.
The proposed project occurs primarily in areas which have been previously developed and used
for farming and pasture for a long period of time. Disturbance within these areas due to
construction of the pipeline routes and well field is anticipated to have minimal effect on the
existing environment. Although suitable habitat for some listed species may exist within the
project areas, no impact is anticipated due to the abundance of similar habitat near the project
area and the ability of most species to relocate to those areas if necessary. The presence or
absence of potential habitat within an area does not confirm the presence or absence of a listed
species. No species specific surveys were conducted in the project area for this report.
Wetland Areas
Potential wetland impacts could occur along the pipeline and well field areas located near rivers,
streams, or marshy areas. The wells, collection system within the well field, and transmission
systems should be sited in such a way as to avoid or minimize impacts to these sensitive
resources. Potential impacts can be minimized by right-of-way selection and appropriate
construction methods, including erosion controls and revegetation procedures. Compensation
for net losses of wetland would be required where impacts are unavoidable and a permit from
the U.S. Army Corps of Engineers would be required for impacts to waters of the U.S.
Cultural Resources
Impacts to National Register-listed properties or districts, state historic sites, cemeteries or other
cultural resources that are mapped by the Texas Historical Commission should be easily avoided
through planning associated with the development of the well fields and pipeline routes.
A cultural resource survey of the well field and pipeline routes for each of the proposed project
areas will need to be performed consistent with requirements of the Texas Antiquities Code.
Summary of Overall Possible Environmental Impacts
Because of the relatively small areas involved, construction and maintenance of surface
facilities are not expected to result in substantial environmental impacts. Where environmental
resources (e.g., endangered species habitat and cultural resource sites) could be impacted by
infrastructure, minor adjustments in facility siting and pipeline alignment would generally be
sufficient to avoid or minimize adverse effects.
The pumping of groundwater from the Evangeline Aquifer could cause a slight reduction on
baseflow in downstream reaches. However, no measurable impact on wildlife along the
streams is anticipated from this project. Minor land surface subsidence could potentially occur
as a result of lowering of groundwater levels. As a result, drainage patterns and other habitats
might change to a small extent.
5D.8-44
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5D.8.2.4 Engineering and Costing
Based on data collected and provided by Evangeline/Laguna LP, the key features identified and
evaluated for planning and costing purposes for 2021 Region N Plan water management
strategy are as follows:
• Wells: The well field consists of 13 wells (production constrained by MAG). At full
project production, the wellfield consists of 18 wells including contingency. Well depth =
1,000 ft Pumping rate = 1,200 gallons per minute (gpm) each. Wells are phased based
on MAG limitations, with full well field build-out after Year 2050 as described above.
• Raw groundwater quality of 800 mg/L TDS is expected, and wells would be screened
and operated in such a manner to target groundwater with lower levels of TDS and
chlorides.
• A purchase cost of raw water of $480.60 per ac-ft.
• Facilities are sized to deliver full project amount: 28,486 acft/yr (25 MGD). Yield is
limited based on MAG.
• Raw water delivery options:
o Option 1 - Evangeline/Laguna LP Raw Groundwater Strategy- Region N Plan
With MAG Limits (Delivery Option 1, Figure 5D.8.1)
o Option 2 - Evangeline/Laguna LP Raw Groundwater Strategy- Region N Plan
With MAG Limits (Delivery Option 2, Figure 5D.8.1)
o Option 3 - Evangeline/Laguna LP Raw Groundwater Strategy- Region N Plan
With MAG Limits (Delivery Option 3, Figure 5D.8.1)
Overall, the project cost ranges from $74,596,000 to $115,585,000 depending on delivery
option. Annual costs range from $18,492,000 to $22,210,000. At a yield of 24,873 ac-ft/yr,
the unit cost of water ranges from $743 to $893 per ac-ft. Cost tables are presented in Table
5D.8.29 through Table 5D.8.32. A cost estimate summarizing updated unit cost with full
utilization of Delivery Option 1 after 2050 when sufficient MAG is available is shown in Table
5D.8.30.
5D.8-45
FNCoastal Bend Regional Water Plan I October 2020 Coastal Bend Regional
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Table 5D.8.29.
Cost Estimate Summary Water Supply Project Option,
September 2018 Prices,
Evangeline/Laguna LP Raw Groundwater Strategy- Region N Plan with MAG Limits
(Delivery Option 1)
Item Estimated Costs
for Facilities
Primary Pump Station $14,127,000
Transmission Pipeline(36 in dia., 20.5 miles) $28,911,000
Well Fields (18 Wells, only 12 Operating, Pumps, and Piping) $35,051,000
Storage Tanks(Other Than at Booster Pump Stations) $1,956,000
Water Treatment Plant(0 MGD) $0
Total Cost of Facilities $80,045,000
Engineering and Feasibility Studies, Legal Assistance, Financing, Bond Counsel, and $26,570,000
Contingencies(30%for pipes&35%for all other facilities)
Environmental &Archaeology Studies and Mitigation $1,002,000
Land Acquisition and Surveying (-80 acres) $532,000
Interest During Construction (3%for 2.5 years with a 0.5% ROI) $7,436,000
Total Cost of Project $115,585,000
Annual Cost
Debt Service (3.5 percent, 20 years) $8,133,000
Operation and Maintenance
Pipeline,Wells, and Storage Tanks (1%of Cost of Facilities) $659,000
Intakes and Pump Stations(2.5%of Cost of Facilities) $353,000
Pumping Energy Costs(13890348 kW-hr @ 0.08$/kW-hr) $1,111,000
Purchase of Water(24873 acft/yr @ 480.6$/acft) $11,954,000
Total Annual Cost $22,210,000
Available Project Yield (acft/yr) 24,873
Annual Cost of Water($ per acft) $893
Annual Cost of Water After Debt Service ($ per acft) $566
Annual Cost of Water($ per 1,000 gallons) $2.74
Annual Cost of Water After Debt Service ($ per 1,000 gallons) $1.74
Note: One or more cost element has been calculated externally
5D.8-46
FNCoastal Bend Regional Water Plan I October 2020 Coastal Bend Regional
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Table 5D.8.30.
Cost Estimate Summary Water Supply Project Option,
September 2018 Prices,
Evangeline/Laguna LP Raw Groundwater Strategy-
Up to Permitted Amount after 2050 when MAG is Available (Delivery Option 1)
Item Estimated Costs
for Facilities
Primary Pump Station $14,127,000
Transmission Pipeline (36 in dia., 20.5 miles) $28,911,000
Well Fields (18 Wells, Pumps, and Piping) $35,051,000
Storage Tanks(Other Than at Booster Pump Stations) $1,956,000
Water Treatment Plant(0 MGD) $0
Total Cost of Facilities $80,045,000
Engineering and Feasibility Studies, Legal Assistance, Financing, Bond Counsel, $26,570,000
and Contingencies (30%for pipes &35%for all other facilities)
Environmental&Archaeology Studies and Mitigation $1,002,000
Land Acquisition and Surveying (-80 acres) $532,000
Interest During Construction (3%for 2.5 years with a 0.5% ROI) $7,436,000
Total Cost of Project $115,585,000
Annual Cost
Debt Service(3.5 percent, 20 years) $8,133,000
Operation and Maintenance
Pipeline,Wells, and Storage Tanks (1%of Cost of Facilities) $659,000
Intakes and Pump Stations (2.5%of Cost of Facilities) $353,000
Water Treatment Plant $0
Pumping Energy Costs(20142359 kW-hr @ 0.08$/kW-hr) $1,611,000
Purchase of Water(28485 acft/yr @ 480.6$/acft) $13,690,000
Total Annual Cost $24,446,000
Available Project Yield (acft/yr) 28,486
Annual Cost of Water($ per acft) $858
Annual Cost of Water After Debt Service ($ per acft) $573
Annual Cost of Water($ per 1,000 gallons) $2.63
Annual Cost of Water After Debt Service($ per 1,000 gallons) $1.76
Note: One or more cost element has been calculated externally
5D.8-47
FNCoastal Bend Regional Water Plan I October 2020 Coastal Bend Regional
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Gulf Coast Aquifer Supplies[31 TAC§357.34&§357.35]
Table 5D.8.31.
Cost Estimate Summary Water Supply Project Option,
September 2018 Prices,
Evangeline/Laguna LP Raw Groundwater Strategy- Region N Plan With MAG Limits
(Option 2)
Item Estimated Costs
for Facilities
Primary Pump Station $5,769,000
Transmission Pipeline (36 in dia., 5 miles) $8,542,000
Well Fields(18 Wells only 12 Operating, Pumps, and Piping) $35,051,000
Storage Tanks (Other Than at Booster Pump Stations) $1,956,000
Water Treatment Plant(0 MGD) $0
Total Cost of Facilities $51,318,000
Engineering and Feasibility Studies, Legal Assistance, Financing, Bond Counsel, and $17,534,000
Contingencies (30%for pipes&35%for all other facilities)
Environmental &Archaeology Studies and Mitigation $622,000
Land Acquisition and Surveying (19 acres) $323,000
Interest During Construction (3%for 2.5 years with a 0.5% ROI) $4,799,000
Total Cost of Project $74,596,000
Annual Cost
Debt Service(3.5 percent, 20 years) $5,249,000
Operation and Maintenance
Pipeline,Wells, and Storage Tanks (1%of Cost of Facilities) $455,000
Intakes and Pump Stations(2.5%of Cost of Facilities) $144,000
Pumping Energy Costs(8621955 kW-hr @ 0.08$/kW-hr) $690,000
Purchase of Water(24873 acft/yr @ 480.6$/acft) $11,954,000
Total Annual Cost $18,492,000
Available Project Yield (acft/yr) 24,873
Annual Cost of Water($ per acft) $743
Annual Cost of Water After Debt Service ($ per acft) $532
Annual Cost of Water($ per 1,000 gallons) $2.28
Annual Cost of Water After Debt Service ($ per 1,000 gallons) $1.63
Note: One or more cost element has been calculated externally
5D.8-48
Coastal Bend Regional Water Plan I October 2020 ,.pasta Bend Reg ora
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Gulf Coast Aquifer Supplies[31 TAC§357.34&§357.35]
Table 5D.8.32.
Cost Estimate Summary Water Supply Project Option,
September 2018 Prices,
Evangeline/Laguna LP Raw Groundwater Strategy- Region N Plan With MAG Limits
(Option 3)
Item Estimated Costs
for Facilities
Primary Pump Station $7,672,000
Transmission Pipeline (36 in dia., 5.6 miles) $9,053,000
Well Fields(18 Wells only 12 Operating, Pumps, and Piping) $35,051,000
Storage Tanks(Other Than at Booster Pump Stations) $1,956,000
Water Treatment Plant(0 MGD) $0
Engineering and Feasibility Studies, Legal Assistance, Financing, Bond $18,353,000
Counsel, and Contingencies(30%for pipes&35%for all other facilities)
Environmental&Archaeology Studies and Mitigation $629,000
Land Acquisition and Surveying (20 acres) $327,000
Interest During Construction (3%for 2.5 years with a 0.5% ROI) $5,022,000
Annual Cost
Debt Service(3.5 percent, 20 years) $5,493,000
Operation and Maintenance
Pipeline,Wells, and Storage Tanks (1%of Cost of Facilities) $461,000
Intakes and Pump Stations(2.5%of Cost of Facilities) $192,000
Pumping Energy Costs(10149031 kW-hr @ 0.08$/kW-hr) $812,000
MRP Energy and Power Capacity Compensation $207,000
Purchase of Water(24873 acft/yr @ 480.6$/acft) $11,954,000
Available Project Yield (acft/yr) 24,873
Annual Cost of Water($ per acft) $769
Annual Cost of Water After Debt Service ($ per acft) $548
Annual Cost of Water($ per 1,000 gallons) $2.36
Annual Cost of Water After Debt Service ($ per 1,000 gallons) $1.68
Note: One or more cost element has been calculated externally
5D.8-49
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Gulf Coast Aquifer Supplies[31 TAC§357.34&§357.35]
5D.8.2.5 Implementation Issues
The groundwater supply analyses considered for this water management strategy were based
on MAGs adopted by local GCD and GMAs according to TWDB guidance for regional water
planning. For future planning efforts, new MAGs provided by GCDs and GMAs located in the
Coastal Bend Region need to be considered when determining available groundwater supplies.
Implementation of the Raw Groundwater Supply Project includes the following issues:
• Verification of the Gulf Coast Aquifer water quality for concentrations of the dissolved
constituents such as TDS, chloride, sulfate, iron, manganese, radium, uranium, and
arsenic;
• Purchase of water or lease of property for well field, and coordination with landowners;
• Impact of water levels in the aquifer, potential intrusion of saline groundwater, land
surface subsidence, and streamflow;
• USACE Section 10 and 404 dredge and fill permits for pipelines;
• General Land Office Sand and Gravel Removal permit for pipeline and crossings of
streams and roads;
• General Land Office Easement for use of State-owned lands, if any;
• Cultural resources investigations in accordance with the Texas Historical Commission
and the Texas Antiquities Code;
• Texas Parks and Wildlife Department Sand, Gravel, and Marl permit; and
• Mitigation requirements would vary depending on impacts, but could include vegetation
restoration, wetland creation or enhancement, or additional land acquisition.
5D.8.2.6 Evaluation Summary
An evaluation summary of this regional water management strategy is provided in Table 5D.8.33.
5D.8-50
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Table 5D.8.33.
Evaluation Summary of the Evangeline/Laguna LP Raw Groundwater Project Option
Impact Category Comment(s)
a. Water supply:
1. Quantity 1. Yield limited to 24,873 acft/yr through 2050 based on MAG.
2. Reliability 2. High reliability.
3. Cost of treated water 3. Generally moderate cost; between$743 to$893 per ac-ft for
three different delivery options.
b. Environmental factors:
1. Instream flows 1. Moderate impact.
2. Bay and estuary inflows and arms of 2. None or low impact.
the Gulf of Mexico
3. Wildlife habitat 3. None or low impact
4. Wetlands 4. None or low impact
5. Threatened and endangered species 5. None identified. Project can be adjusted to bypass sensitive
areas. Endangered species survey will be needed to identify
impacts.
6. Cultural resources 6. Cultural resources survey will be needed to identify any
significant sites.
7. Water quality 7.
a. dissolved solids a-b,d. Total dissolved solids, chloride, and salinity of water is
b. salinity expected to be within TCEQ drinking water standards.
c. bacteria C. None or low impact.
d. chlorides a-i. Sulfate, uranium and arsenic concentrations in
e. bromide groundwater will need to be considered prior to
f. sulfate implementation of project.
g. uranium
h. arsenic
i. other water quality constituents
c. Impacts to Agricultural Resources or Negligible impacts to agricultural resources.
State water resources None or low negative impacts on surface water resources
d. Threats to agriculture and natural None or low impacts. Temporary damage due to construction of
resources in region pipeline
e. Recreational impacts None
f. Equitable comparison of strategies Standard analyses and methods used for portions
g. Interbasin transfers Not applicable
h. Third party social and economic impacts Not applicable
from voluntary redistribution of water
i. Efficient use of existing water supplies Provides regional opportunities for water that would otherwise
and regional opportunities be unused
j. Effect on navigation None
k. Impacts on water pipelines and other Construction and maintenance of transmission pipeline corridor.
facilities used for water conveyance Possible impact to wildlife habitat along pipeline route and right-
of-way.
5D.8-51
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5D.8-52
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Seawater Desalination[31 TAC§357.34&§357.35]
5D.10.5 City of Corpus Christi Seawater Desalination- Inner
Harbor and La Quinta Channel Projects
5D.10.5.1 Description of Strategy
Desalting seawater from the Gulf of Mexico is a potential source of freshwater supplies for
municipal and industrial uses. In August 2004, the City of Corpus Christi (City) conducted a
feasibility study" funded by the TWDB of a large-scale seawater desalination facility in the
Region N area. For the 2006 and 2011 Coastal Bend Regional Water Plans, a large-scale 25 to
100 mgd seawater desalination facility co-sited with the Barney M. Davis Power Station in
Corpus Christi near Laguna Madre, Oso Bay, and Corpus Christi Bay was considered.
Favorable factors for the Barney Davis power station location include: use of cooling plant
effluent for diluting concentrate, ability to use the existing seawater intake infrastructure at the
power plant, and close proximity to the water distribution system. The desalination concentrate
was considered to be piped out to the open Gulf of Mexico to be discharged in waters over 30
feet deep. The 2011 Coastal Bend Plan estimated the cost of a 25 mgd seawater desalination
facility at Barney M. Davis Power Station with 5-mile pipeline delivery to proposed distribution
center on the south side of town at $1,696 per ac-ft (or $5.21 per 1,000 gallons) based on
September 2008 dollars. Blending with brackish groundwater, previously evaluated in the 2006
Plan, was eliminated from further consideration based on the lack of availability of groundwater
at suitable quality (summarized in Chapter 11). The seawater desalination facility co-sited with
Barney M. Davis Power Station was included as an alternate strategy in the 2011 Coastal Bend
Regional Water Plan at the 25 mgd size, which was subsequently updated through amendment
in August 2014 to be listed as a recommended strategy in the 2011 Coastal Bend Plan to meet
needs beginning in 2020.
The City, as a wholesale water provider, continues to evaluate seawater desalination options,
including variable desalination programs and combinations with brackish groundwater resources
to address future industrial development and anticipated population growth associated with new
industry and Eagle Ford Shale production. In April 2014, the Corpus Christi City Council voted
to accept a federal, U.S. Bureau of Reclamation grant and transfer funds from the City's Raw
Water Supply Development Fund for a City of Corpus Christi Desalination Program Pilot Study.
In July 2014, Corpus Christi City Council considered and subsequently adopted a resolution to
the 84th Texas Legislature to appropriate funding for FY 16-17 biennium and partnering with
local sponsors to implement desalination projects.
The City conducted a $3 million demonstration program with support from the U.S. Bureau of
Reclamation to design, construct, and operate a demonstration desalination plant for industrial
and drinking water purposes. The objectives of the program are to evaluate the feasibility of
seawater desalination and develop cost estimates, to test emerging technologies, and to identify
and assess site options and requirements for a full-scale facility.12 With the results of the study,
11 City of Corpus Christi,Draft Report"Large Scale Demonstration Desalination Feasibility Study,"August 2004.
12 City of Corpus Christi website,"Corpus Christi Desalination Demonstration Project",June 2014.
http://www.cctexas.coliAssets/Departments/Water/Files/DesalFactSliegLPdf
5D.10-12
Coastal Bend Regional Water Plan I October 2020 Coastal Bend Regional WIN I;
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Seawater Desalination[31 TAC§357.34&§357.35]
the City will consider moving forward with a full-scale desalination project. During preliminary
studies, the Barney M. Davis Power Station option was removed from further consideration due
to a lack of interest by the power station to participate, as well as the location not being
favorable with respect to anticipated industrial and municipal growth areas.13 As of November
2019, two potential sites are being considered by the City of Corpus Christi to provide additional
supplies of 10 mgd for Nueces County industries and municipal customers and 20 mgd for San
Patricio County: Inner Harbor and La Quinta Channel. These locations are shown in
Figure 5D.10.3, with the aerial photograph showing the most current location.
• 1 ....,r . i l _ Y4L
gyp,►.a ;Ra
Corpus ami Bay
1-f
• ti r•`ti
C�RPU
CHRIS
Source: Corpus Christi Desalination Demonstration Project Fact Sheet,June 2014(http://www.cctexas.com/Assets/
Departments/Water/Files/DesalFactSheet.pdf)and City of Corpus Christi,email October 2019
Figure 5D.10.3.
Proposed Location for Seawater Desalination Program
The Inner Harbor Desalination site in Nueces County could scale up from 10 to 30 MGD and La
Quinta Channel Desalination site in San Patricio County could scale up from 20 to 40 MGD. The
plants will likely expand to ultimate capacity in 30 years or more (2070+), but flexibility will be
left for significant demand growth in the region. The treatment efficiency of the desalination plant
is estimated to be 45- 50 percent. The finished water quality is targeted to be approximately 500
mg/L. The Inner Harbor Plant will treat all of its product water to potable standards and send it
through the City of Corpus Christi distribution system. The La Quinta Channel Plant will treat the
product water to potable water standards and deliver it to SPMWD. The SPMWD will deliver this
water to industrial customers, but they may adjust water quality to meet the needs of different
customers.
is City of Corpus Christi staff,February 2015.
5D.10-13
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Seawater Desalination[31 TAC§357.34&§357.35]
5D.10.5.2 Available Yield- Inner Harbor
Seawater from the Gulf of Mexico is assumed to be available in an unlimited quantity within the
context of a supply for the Coastal Bend Region. Also, it is assumed that the cost of Gulf water
is zero prior to extraction from the source. The City of Corpus Christi and port industries are
currently considering finished desalination supplies of 10 mgd (11,201 ac-ft/yr) to 30 MGD
(33,604 ac-ft/yr) at the Inner Harbor facility.
5D.10.5.3 Engineering and Costing- Inner Harbor
Based on information provided by City staff and its consultant, the following costs were
identified for the Inner Harbor seawater desalination project as shown in Table 5D.1 0.3 and
Table 5D.10.4:
• Total estimated construction costs for a 10 mgd Inner Harbor facility $237 million.
• Total estimated construction costs for a 30 mgd Inner Harbor facility $563 million.
• Lifecycle water production costs, at the fence, are estimate to be $9.87 per 1,000 gallons
with debt service for a plant located at the 10 MGD Inner Harbor facility.
• Lifecycle water production costs, at the fence, are estimate to be $7.84 per 1,000 gallons
with debt service for a plant located at the 30 MGD Inner Harbor facility.
Details regarding intake, desalination process, concentrate disposal outfall, and site-specific
environmental impacts for transmission and delivery is unavailable at this time. A 3,500 ft raw
water pipeline, 2,300 ft concentrate discharge pipeline, and 500 ft product water delivery line are
included in the cost estimate, based on information provided by Freese and Nichols.
Energy is the largest operational cost of a desalination facility, and energy use is directly
proportional to salinity of the source water. Using the Unified Costing Model tool for regional
water planning according to TWDB guidelines, which includes a higher cost for operations and
maintenance is expected to result in an annual cost around $36,042,000 to $85,875,000 for the
10 MGD and 30 MGD plants. This results in a unit cost of water of$3,218 to $2,555 per ac-ft
after debt service for Inner Harbor sites with plant size ranging from 10-30 MGD. Private
industry partnerships and funding structures may be considered to help reduce costs and
minimize treatment plant operation and maintenance risks assumed by City operators, which
may account for costing differences as compared to information shown in Table 5D.10.3 and
Table 5D.10.4. The information was developed based on capital costs, project costs, and
annual water productions costs provided by Freese and Nichols, updated using the UCM and is
relevant for desalination distribution near the facility. Delivery costs to specific industries or
municipal distribution system are not included.
5D.10-14
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Seawater Desalination[31 TAC§357.34&§357.35]
Table 5D.10.3.
Cost Estimate Summary,
City of Corpus Christi-Inner Harbor 10 mgd Desalination Project(Sept 2018 Prices)
Item Estimated Costs
for Facilities
Transmission Pipeline (raw water piping) $25,000,000
Storage Tanks (and Delivery) $11,000,000
Water Treatment Plant(10 MGD) $126,855,000
Total Cost of Facilities $162,855,000
Engineering and Feasibility Studies, Legal Assistance, Financing, Bond Counsel, and $55,749,000
Contingencies (30%for pipes&35%for all other facilities)
Land Acquisition and Surveying (12 acres) $50,000
Interest During Construction (3%for 3 years with a 0.5% ROI) $18,039,000
Total Cost of Project $236,693,000
Annual Cost
Debt Service (3.5 percent, 20 years) $16,654,000
Water Treatment Plant $19,028,000
Total Annual Cost $36,042,000
Available Project Yield (acft/yr) 11,201
Annual Cost of Water($ per acft) $3,218
Annual Cost of Water After Debt Service ($ per acft) $1,731
Annual Cost of Water($ per 1,000 gallons) $9.87
Annual Cost of Water After Debt Service ($ per 1,000 gallons) $5.31
Note: Costs based on information provided by the City of Corpus Christi. The water treatment plant annual costs
from the TWDB uniform costing model includes energy costs associated with use of reverse osmosis membrane
treatment to desalinate seawater and produce finished water with TDS levels below the TCEQ regulatory limit.
5D.10-15
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Seawater Desalination[31 TAC§357.34&§357.35]
Table 5D.10.4.
Cost Estimate Summary,
City of Corpus Christi-Inner Harbor 30 mgd Desalination Project(Sept 2018 Prices)
Item Estimated Costs
for Facilities
Transmission Pipeline (raw water piping; brine concentrate disposal x 3) $51,000,000
Storage Tanks (and Delivery)x 3 $33,000,000
Water Treatment Plant(30 MGD) $302,911,000
Total Cost of Facilities $386,911,000
Engineering and Feasibility Studies, Legal Assistance, Financing, Bond Counsel, and $132,869,000
Contingencies (30%for pipes&35%for all other facilities)
Land Acquisition and Surveying (26 acres) $108,000
Interest During Construction (3%for 3 years with a 0.5% ROI) $42,891,000
Total Cost of Project $562,779,000
Annual Cost
Debt Service (3.5 percent, 20 years) $39,598,000
Operation and Maintenance
Pipeline,Wells, and Storage Tanks (1%of Cost of Facilities) $840,000
Water Treatment Plant $45,437,000
Total Annual Cost $85,875,000
Available Project Yield (acft/yr) 33,604
Annual Cost of Water($ per acft) $2,555
Annual Cost of Water After Debt Service ($ per acft) $1,377
Annual Cost of Water($ per 1,000 gallons) $7.84
Annual Cost of Water After Debt Service ($ per 1,000 gallons) $4.23
Note: Costs based on information provided by the City of Corpus Christi. The water treatment plant annual costs
from the TWDB uniform costing model includes energy costs associated with use of reverse osmosis membrane
treatment to desalinate seawater and produce finished water with TDS levels below the TCEQ regulatory limit.
5D.10-16
Coastal Bend Regional Water Plan I October 2020 Coastal Bend Regional VW
HDR-007003-10028677-275994-012 water Planning Group
Seawater Desalination[31 TAC§357.34&§357.35]
5D.10.5.4 Available Yield- La Quinta
Seawater from the Gulf of Mexico is assumed to be available in an unlimited quantity within the
context of a supply for the Coastal Bend Region. Also, it is assumed that the cost of Gulf water
is zero prior to extraction from the source. The City of Corpus Christi and port industries are
currently considering finished desalination supplies of 20 mgd (22,403 ac-ft/yr) to 40 mgd
(44,806 ac-ft/yr).
5D.10.5.5 Engineering and Costing- La Quinta
Based on information provided by City staff and its consultant, the following costs were
identified for the La Quinta Channel seawater desalination project as shown in Table 5D.10.5
and Table 5D.10.6:
• Total estimated construction costs for a 20 mgd La Quinta facility $420 million.
• Total estimated construction costs for a 40 mgd La Quinta facility $768 million.
• Lifecycle water production costs, at the fence, are estimate to be $8.59 per 1,000 gallons
with debt service at the 20 MGD La Quinta facility.
• Lifecycle water production costs, at the fence, are estimate to be $7.81 per 1,000 gallons
with debt service for a plant located at the 40 MGD La Quinta facility.
Details regarding intake, desalination process, concentrate disposal outfall, and site-specific
environmental impacts for transmission and delivery is unavailable at this time. A 11,800 ft raw
water pipeline, 14,500 ft concentrate discharge pipeline, and 2,000 ft product water delivery line
are included in the cost estimate, based on information provided by Freese and Nichols.
Energy is the largest operational cost of a desalination facility, and energy use is directly
proportional to salinity of the source water. Using the Unified Costing Model tool for regional
water planning according to TWDB guidelines, which includes a higher cost for operations and
maintenance is expected to result in an annual cost around $62,720,000 to $114,102,000. This
results in a unit cost of water of$2,800 to $2,547 per ac-ft after debt service for La Quinta sites
with plant size ranging from 20-40 MGD. Private industry partnerships and funding structures
may be considered to help reduce costs and minimize treatment plant operation and
maintenance risks assumed by City operators, which may account for costing differences as
compared to information shown in Table 5D.10.5 and Table 5D.10.6. The information presented
in the tables was developed based on capital costs, project costs, and annual water productions
costs provided by Freese and Nichols, updated using the UCM and is relevant for desalination
distribution near the facility. Delivery costs to specific industries or municipal distribution system
are not included.
5D.10-17
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Seawater Desalination[31 TAC§357.34&§357.35]
Table 5D.10.5.
Cost Estimate Summary,
City of Corpus Christi- La Quinta 20 mgd Desalination Project(Sept 2018 Prices)
Item Estimated Costs
for Facilities
Transmission Pipeline $78,000,000
Storage Tanks (Other Than at Booster Pump Stations) $13,000,000
Water Treatment Plant(20 MGD) $214,883,000
Total Cost of Facilities $305,883,000
Engineering and Feasibility Studies, Legal Assistance, Financing, Bond Counsel, and $103,159,000
Contingencies (30%for pipes&35%for all other facilities)
Land Acquisition and Surveying (19 acres) $79,000
Interest During Construction (3%for 1 years with a 0.5% ROI) $11,251,000
Total Cost of Project $420,372,000
Annual Cost
Debt Service (3.5 percent, 20 years) $29,578,000
Operation and Maintenance
Pipeline,Wells, and Storage Tanks (1%of Cost of Facilities) $910,000
Water Treatment Plant $32,232,000
Total Annual Cost $62,720,000
Available Project Yield (acft/yr) 22,402
Annual Cost of Water($ per acft), $2,800
Annual Cost of Water After Debt Service ($ per acft), $1,479
Annual Cost of Water($ per 1,000 gallons), $8.59
Annual Cost of Water After Debt Service ($ per 1,000 gallons), $4.54
Note: Costs based on information provided by the City of Corpus Christi. The water treatment plant annual costs
from the TWDB uniform costing model includes energy costs associated with use of reverse osmosis membrane
treatment to desalinate seawater and produce finished water with TDS levels below the TCEQ regulatory limit.
5D.10-18
FNCoastal Bend Regional Water Plan I October 2020 Coastal Bend Regional 1;;,.,
HDR-007003-10028677-275994-012 water Planning Group "
Seawater Desalination[31 TAC§357.34&§357.35]
Table 5D.10.6.
Cost Estimate Summary,
City of Corpus Christi- La Quinta 40 mgd Desalination Project(Sept 2018 Prices)
Item Estimated Costs
for Facilities
Transmission Pipeline (raw water piping/intake; brine concentrate disposal x 2) $113,000,000
Storage Tanks (and Delivery)x 2 $26,000,000
Water Treatment Plant(40 MGD) $390,940,000
Engineering and Feasibility Studies, Legal Assistance, Financing, Bond Counsel, and $179,829,000
Contingencies (30%for pipes&35%for all other facilities)
Land Acquisition and Surveying (33 acres) $138,000
Interest During Construction (3%for 3 years with a 0.5% ROI) $58,568,000
Annual Cost
Debt Service (3.5 percent, 20 years) $54,071,000
Operation and Maintenance
Pipeline,Wells, and Storage Tanks (1%of Cost of Facilities) $1,390,000
Water Treatment Plant $58,641,000
Available Project Yield (acft/yr) 44,804
Annual Cost of Water($ per acft) $2,547
Annual Cost of Water After Debt Service ($ per acft) $1,340
Annual Cost of Water($ per 1,000 gallons) $7.81
Annual Cost of Water After Debt Service ($ per 1,000 gallons) $4.11
Note: Costs based on information provided by the City of Corpus Christi. The water treatment plant annual costs
from the TWDB uniform costing model includes energy costs associated with use of reverse osmosis membrane
treatment to desalinate seawater and produce finished water with TDS levels below the TCEQ regulatory limit.
5D.10.5.6 Environmental Issues
The two project areas being considered by the City of Corpus Christi for the proposed desalination
plant are the Inner Harbor and La Quinta sites. The La Quinta option is located on Corpus Christi
Bay, east of the inlet to Nueces Bay; the Inner Ship Channel option is located along the Main
Turning Basin, near the outlet to Corpus Christi Bay. The specific siting information is still to be
determined, but each proposed desalination plant site would be approximately 10 acres in size.
Key factors considered in the selection of these two locations are the availability of power,
proximity to the water transmission system, the character of the source water, location of a
suitable concentrate discharge location, among other environmental considerations.14
Specific siting information for the discharge of desalination concentrate will be determined during
project design. Since the desalination concentrate will be saltier than the receiving waters, the
14 City of Corpus Christi Desalination Project Frequently Asked Questions
(https://www.cctexas.com/sites/default/files/water-desal-faq-022819.pdf)
5D.10-19
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Seawater Desalination[31 TAC§357.34&§357.35]
City of Corpus Christi has stated that a diffusing system would be desirable to remix the
concentrate with the source water. Additional chemicals, which may be used during the
filtering/treating process, may be present in the concentrate. The outfall for brine concentrate will
need to consider impacts to the estuary and bay system. Prior to construction, site specific
environmental studies will need to be conducted to evaluate all potential impacts to the
environment, and identify best management practices to eliminate or reduce adverse impacts. 16
The City plans to submit water rights and discharge permit applications to TCEQ in 2020.
Inner Harbor Desalination Site
The Texas Parks and Wildlife Department maintains the Texas Natural Diversity Database
(TXNDD) which documents the occurrence of endangered, threatened and rare species, natural
communities, and animal aggregations. The TXNDD data was reviewed for recorded
occurrences of listed or rare species or natural communities, near the proposed project. The
plains spotted skunk (Spilogale putorius interrupts), a rare species has been documented at the
project site. The West Indian manatee (Trichechus manatus), a federally-listed threatened
species, and a marine mammal with protections under the Marine Mammal Protection Act has
been documented within two miles of the proposed project site. Three rare species, the Texas
diamondback terrapin (Malaclemys terrapin littoralis), Texas stonecrop (Lenophyllum texanum),
and Texas windmill grass (Chloris texensis) have also been documented within two miles of the
proposed project. The TXNDD data identified a colonial wading bird colony (rookery) on the
northeast side of the causeway (US 181) across Nueces Bay.
National Wetland Inventory (NWI) maps were reviewed and the proposed Inner Harbor
Desalination site may be in close proximity to estuarine and marine deepwater habitat,
freshwater ponds, and freshwater emergent wetlands. A jurisdictional determination of waters
should be completed for the proposed project site, during project planning. Coordination with the
U.S. Army Corps of Engineers would be required for impacts to waters of the U.S.
The proposed desalination plant would be located on the Inner Harbor. The Corpus Christi
Inner Harbor (TCEQ Segment 2484) is listed as impaired on TCEQ's 2020 Draft 303(d) List 16 for
copper in the water. Within approximately 5 miles, several Corpus Christi Bay Recreational
Beaches (TCEQ Segments 2481 CB_03, _04 and _06) are listed as impaired for bacteria in
water. Additionally, the inlet to Nueces Bay (Oyster Water) (TCEQ Segment 24820W) is likely
within 5 miles of the proposed desalination plant and is listed as impaired for copper in water.
Cultural resources protection on public lands in Texas is afforded by the Antiquities Code of
Texas (Title 9, Chapter 191, Texas Natural Resource Code of 1977), the National Historic
Preservation Act (PI96-515), and the Archeological and Historic Preservation Act (PL93-291).
Based on the review of publicly available Geographic Information System (GIS) records
obtained from the Texas Historical Commission, there are no State Historic Sites, National
City of Corpus Christi Desalination Project Frequently Asked Questions
(https://www.cctexas.com/sites/default/files/water-desal-faq-022819.pdf)
16 TCEQ,2020. Draft 2020 Texas Integrated Repot—Texas 303(d)List(Category 5). Accessed online
https://www.tceq.texas.gov/assets/public/waterqualiiy/swgm assess/2Otxir/2020_303d.pdf January 13,2020.
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Seawater Desalination[31 TAC§357.34&§357.35]
Register Properties or Districts, cemeteries or Historical Markers within the project area. Two
cemeteries, New Bayview and Old Bayview, as well as five sites listed on the National Register
of Historic Places, the Nueces County Courthouse, Simon Gugenheim House, Charlotte Sidbury
House, S. Julius Lichtenstein House, and the U.S.S. Lexington were located within
approximately one mile from the project area. A review of archaeological resources in the
proposed project area should be conducted during the project planning phase. Because the
owner or controller of the proposed project, the City of Corpus Christi, is a political subdivision of
the State of Texas they will be required to coordinate with the Texas Historical Commission prior
to project construction.
La Quinta Desalination Site
The TXNDD data was reviewed for documented occurrences of listed or rare species or natural
communities near the project area. The federally-listed endangered jaguarundi (Felis
yagouaroundi cacomitli), as well as several rare species or SGCN, the keeled earless lizard
(Holbrookia propinqua), coastal gay-feather (Liatris bracteata), threeflower broomweed
(Thurovia triflora), Indianola beakrush (Rynchospora indianolensis), and Wright's trichocoronis
(Trichocoronis wrightii var wrightii) have been documented within two miles of the proposed La
Quinta site. Additionally, a rookery was documented on the spoil banks in Corpus Christi Bay,
located southeast of the project area.
National Wetland Inventory (NWI) maps were reviewed and the proposed La Quinta
Desalination site may be in close proximity to estuarine and marine deepwater habitat, estuarine
and marine wetlands, freshwater ponds, and lakes. A jurisdictional determination of waters
should be completed for the proposed project site, during project planning. Coordination with the
U.S. Army Corps of Engineers would be required for impacts to waters of the U.S.
The proposed desalination plant would be located on the Corpus Christi Bay (TCEQ Segment
2481 OW)." This Segment is not listed as impaired on the 2020 Draft 303(d) List. No impaired
water quality segments are likely located within 5 miles of the proposed project site.
Based on the review of publicly available GIS records obtained from the Texas Historical
Commission, there are no State Historic Sites, National Register Properties or Districts,
cemeteries or Historical Markers within the project area, or within one mile of the proposed
project area. A review of archaeological resources in the proposed project area should be
conducted during the project planning phase. Because the owner or controller of the proposed
project, the City of Corpus Christi, is a political subdivision of the State of Texas (i.e., river
authority, municipality, county, etc.), they will be required to coordinate with the Texas Historical
Commission prior to project construction.
5D.10.5.7 Implementation Issues
The installation and operation of a seawater desalination water treatment plant may have to
address the following issues.
TCEQ,2020. Surface Water Quality Viewer. Accessed online tceq.maps.arcgis.com January 13,2020.
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Seawater Desalination[31 TAC§357.34&§357.35]
• Disposal of concentrated brine from desalination water treatment plant;
• Permitting and constructing concentrate pipeline through seagrass beds and barrier island,
including conforming with applicable laws and regulations including:
o USACE permitting (including Section 404 Clean Waters Act and Section 10 Rivers
& Harbors Act)
o Endangered Species Act compliance and TPWD coordination, if required
o Compliance with the Antiquities Code of Texas, the National Historic
Preservation Act, and the Archeological and Historic Preservation.
o TCEQ Water Right, TPDES, stormwater, and associated construction permits
o Associated TCEQ registrations
o Local land use and construction permits
o GLO permitting requirements
• Impact on the bays from removing water for consumptive use and altering existing power
plant water rights permits;
• Confirming that blending desalted seawater with other water sources in the municipal
demand distribution system can be successfully accomplished;
• High power requirements for desalination process dependent on large, reliable power
source;
• Skilled operators of desalination water treatment plants;
• Permitting of a pipeline across rivers, highways, and private rural and urban property; and
• Possibility of using design, build, operate contract for a desalination water treatment plant.
5D.10.5.8 Evaluation Summary
An evaluation summary of this regional water management strategy is provided in Table
5D.10.7.
5D.10-22
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Seawater Desalination[31 TAC§357.34&§357.35]
Table 5D.10.7.
Evaluation Summary of the City of Corpus Christi's Inner Harbor and La Quinta Seawater
Desalination Projects
Impact Category Comment(s)
a. Water supply:
1. Quantity 1. Project size: Inner Harbor: 11,201 ac-ft/yr)to 33,604 ac-
ft/yr and La Quinta: 22,402 ac-ft/yr)to 44,804 ac-ft/yr
2. Reliability 2. Highly reliable quantity.
3. Cost of treated water 3. Cost for Inner Harbor: $2,555 to $3,218 and La Quinta
$2,547 to$2,800 perac-ft.
b. Environmental factors:
1. Instream flows 1. None or low impact.
2. Bay and estuary inflows and arms of the 2. Some environmental impact to estuary.
Gulf of Mexico
3. Wildlife habitat 3. Some. Disposal of concentrated brine created from
process may impact fish and wildlife habitats or wetlands.
4. Wetlands 4. Some. Disposal of concentrated brine created from
process may impact fish and wildlife habitats or wetlands.
5. Threatened and endangered species 5. None identified. Endangered species survey will be
needed to identify impacts.
6. Cultural resources 6. Cultural resources survey will be needed to identify any
significant sites.
7. Water quality 7.
a. dissolved solids 7a-b. Total dissolved solids and salinity of water is
b. salinity removed with reverse osmosis treatment. Brine
c. bacteria concentrate disposal issues will need to be
d. chlorides evaluated.
e. bromide 7c-i. Bacteria, chlorides, nitrate, alkalinity, ammonia,
f. sulfate and copper were all identified as constituents of
g. uranium concern for the Nueces Bay in the TCEQ and
h. arsenic NRA Basin Highlights Report. Additional studies
i. other water quality constituents regarding impacts on or as a result of project are
needed.
c. Impacts to agricultural resources and State None or low impacts on other water resources
water resources Negligible impacts to agricultural resources
d. Threats to agriculture and natural resources in Some.Temporary damage due to construction of pipeline
region
e. Recreational impacts None
f. Equitable comparison of strategies Standard analyses and methods used for portions
• Seawater desalination cost modeled after bid and
manufacturers' budgets, but not constructed, comparable
project
g. Interbasin transfers Not applicable
h. Third party social and economic impacts Not applicable
i. Efficient use of existing water supplies and Provides regional opportunities
regional opportunities
j. Effect on navigation None
k. Impacts to water pipelines and other facilities Construction and maintenance of transmission pipeline
used for water conveyance corridor(in future). Possible impact to wildlife habitat
along pipeline route and right-of-way.
5D.10-23