HomeMy WebLinkAboutC2019-445 - 7/23/2019 - NA TASK ORDER NO. 1
This Task Order pertains to a Master Services Agreement for Professional Services by and between City of
Corpus Christi, Texas (City) and "Lockwood, Andrews & Newnam, Inc." (Consultant) dated March 26, 2019
(Agreement). Consultant shall perform services on the project described below as provided in this Task Order
and in the Agreement. This Task Order shall not be binding until it has been properly signed by both parties.
Upon execution, this Task Order shall supplement the Agreement as it pertains to the project described below.
TASK ORDER NO.: 1
PROJECT NUMBER/NAME: 18154A - Citywide Large-Size Water Line Assessment & Repairs
1. PROJECT DESCRIPTION -This project provides engineering services to assist City Staff in performing
condition assessments to identify potential problems, recommend strategies and priorities and assist
with addressing ongoing and impending large diameter water line infrastructure repairs throughout the
City.
2. SCOPE OF SERVICES- Perform a Condition Assessment investigation of three existing large diameter
transmission water lines: 48-inch Steel WL along Leopard Street - 6,323 LF; 30-inch Ductile Iron WL
across Cayo Del Oso —2,961 LF; 24-inch Steel WL across Laguna Madre— 14,741 LF. This Scope of
Work is more fully described in Exhibit A.
3. COMPENSATION - The total amount not to exceed for Task Order No. 1 only is $156,540.00.
This Task Order is approved and Consultant may proceed. All other terms and conditions of the Agreement
remain in full force and effect.
CITY OF o - - SC - I LOCKWOOD, ANDREWS & NEWNAM, INC.
V23- ! 11 K' 7/22/19
Ceff H. Ed onds, P.E. Date Ste 'en A. Gilbreath, P.E. Date
Director of Engineering Services Associate
500 N. Shoreline, Suite 905
Corpus Christi, TX 78401
(361) 882-2257
smharris@lan-inc.com
Fund Name Accounting Unit Account No. Activity No. Amount
Water 2019 CIP 4098-041 550950 18154-A-4098-A $156,540.00
Total $156,540.00
Task Order No. 1
PAGE 1 OF 1
SCANNED
EXHIBIT A
Task Order#1-Scope of Services&Fee Estimate
Citywide Large-Size Water Line Assessment&Repairs
Work Plan:
Under this Work Plan, Lockwood, Andrews & Newnam, Inc. (Engineer) is to perform a Condition Assessment
investigation of three existing large diameter transmission water lines (WL). This Work Plan describes the
engineering services to be undertaken to perform an evaluation of the structural integrity of the lines. The existing
lines are comprised of approximately:
• 48-inch Steel WL along Leopard Street -6,323 LF
• 30-inch Ductile Iron WL across Cayo Del Oso—2,961 LF
• 24-inch Steel WL across Laguna Madre—14,741 LF
In addition to those assumptions and limitations outlined in the Master Service Agreement Exhibit A,the following
are Site Specific Considerations pertaining to the three segments above:
• Five(5)concurrent working days(M-F)are budgeted for indirect field investigations(i.e.,corrosion surveys,
continuity testing, inspection of exposed appurtenances)for all three waterlines.
• Direct field investigation is limited to external observations of appurtenances and waterline pipe exposed
on dry land only.
• If continuity testing results indicate electrical discontinuity in a pipeline segment recommendations and
details for adding proposed bonds at the pipe joints will be contingent upon the following factors:
o Record drawings exist with details of the existing pipe joints and/or the pipe joints are exposed to
observe the type of existing pipe joint.
o Any proposed new internal pipe clips will only be on pipe a minimum of 36 inches in diameter and
only on land-based pipe and not on pipe below water crossings.
• The corrosion survey is limited to indirect assessment only for waterlines at water crossings. The direct
assessment corrosion survey is limited to land-based waterlines only.
• Corrosion survey method assumes the following:
o May exclude surveying channel and intracoastal waterway crossings depending upon the water
depth and amount of marine traffic.
o Excludes surveying segments buried under concrete or HMAC pavements.
• Continuity testing method assumes the following:
o Continuous temporary testing wire can be weighted down at channels and intracoastal waterway
crossings to avoid impacting marine traffic or damaging the wire.
o Small floats may be periodically attached to the testing wire between channel and intracoastal
waterway crossings to assist with locating and retrieving the wire in the event the wire is broken.
o Continuous temporary testing wire will not get stuck on underwater plants,structures or debris.
o Continuous temporary testing wire will not break from the pulling tension or from marine traffic
when pulling the wire across water crossing,or from underwater debris,or from vehicular traffic
when pulling wire across land.
o Temporary testing wire can be readily located and spliced if it were to break.
• 48-inch Steel WL along Leopard Street
EXHIBIT A
Page 1 of 6
o Assumed length of waterline segment is approximately 6,323 LF
o Five(5)concurrent working days(M-F)budgeted for direct field investigations(i.e.,inspect exterior
of waterline after City or City's Contractor excavates to expose the pipe and provide safe access).
o The amount of direct field investigations will be limited to the amount of pipe that the City can
expose and provide safe access to investigate within the five(5)day period.
• 30-inch Ductile Iron WL across Cayo Del Oso
o Assumed length of waterline segment is approximately 2,961 LF
o A boat and operator will be required to provide safe access for corrosion surveys,continuity testing
and exposed appurtenances not accessible from shore. Boats and watercraft/equipment shall be
appropriate for deep channel crossings,shallow water and mud flats.
o Assumes Coast Guard does not reject or delay approval of proposed corrosion survey and
continuity testing methods. Assumes Coast Guard approves,and issues Notice to Mariners within
14 days after submittal.
o Assumes Coast Guard is the only permit/approval required for proposed corrosion survey and
continuity testing methods at water crossings.
• 24-inch Steel WL across Laguna Madre
o Assumed length of waterline segment is approximately 14,741 LF.
o A boat and operator will be required to provide safe access for corrosion surveys,continuity testing
and exposed appurtenances not accessible from shore. Boats and watercraft/equipment shall be
appropriate for deep channel crossings,shallow water and mud flats.
o Assumes Coast Guard does not reject or delay approval of proposed corrosion survey and
continuity testing methods. Assumes Coast Guard approves,and issues Notice to Mariners within
14 days after submittal.
o Assumes Coast Guard is the only permit/approval required for proposed corrosion survey and
continuity testing methods at water crossings.
LAN recommends the following services to be completed under this Task Order:
• Task 1-Desktop Investigations
• Task 2-Field Investigations-Indirect Assessments
• Task 3-Field Investigations—limited(exterior only and on dry land only) Direct Assessment Waterlines
• Task 4-Analysis and Recommendations delivered in a Technical Memorandum
EXHIBIT A
Page 2 of 6
•
A. Basic Services:
Task 1-Desktop Investigations(Indirect Assessments)
Activity 1.1—Kick-off Meeting
Kickoff Meeting-LAN staff will complete one(1)kickoff meeting with Engineering Services and Utilities Department
staff to establish project requirements and review the scope of work and schedule. LAN will produce agenda and
minutes for this meeting,deliverable within five(5)days after completion.
Activity 1.2-Review Existing Data and Reports
Under this Activity, LAN will perform a review of existing documentation of the three existing lines. This review is to
include documentation such as record drawings and available maintenance and repair records (including photos of
past repairs, and construction photos when the pipe was originally installed) to be provided by the City, and
interviews with City personnel experienced with operation and maintenance of the lines.
As part of this effort,the Engineer shall attempt to investigate private and public utility construction activities in the
vicinity of the lines since their installation. The activity will include reviewing City and private utility record drawings
and City Street-Cut permits issued for project constructed in the area.
LAN will review available records,such as historical aerial photos and available record drawings to identify changes
to the surrounding area that could impact the long-term performance of the water lines. Under this task, LAN can
also review original pipe design parameters(if available)and compare to current operating parameters.
Task 2-Field Investigations(Indirect Assessments)
Activity 2.1—Field Confirmation of Pipe/Structure Location
LAN staff will walk the project alignments with City staff to field confirm structure location and pipe location to the
extend visible.
This step will assist with planning for field work, such as corrosion surveys, continuity testing, and potential future
internal pipe observations.
The information gathered under this task will be compiled into a drawing or GIS exhibit for use in discussions and
planning for the following Tasks.
Activity 2.2—Continuity Testing
We understand that many of the City's water lines may have been originally constructed with a Cathodic Protection
(CP)system,likely consisting of sacrificial anodes. CP Systems are critical for the protection of the metallic waterlines
and can be repaired or added. The waterline's pipe joints must be properly bonded to provide electrical continuity
for the CP system to protect the entire water line. LAN will perform continuity testing to verify the integrity of joint
bonding along each line segment.
For this work, it is necessary to make electrical contact to the pipe at multiple locations along the alignment(test
stations,flanges,etc.),therefore,the results will be dependent on accessibility to metallic portions of the pipe.
EXHIBIT A
Page 3 of 6
If break(s) in continuity exist, we will attempt to narrow down the locations of where breaks in the joint bonding
exist,and we will provide recommendations and details for adding internal or external bond clips at the pipe joints
which will be dependent upon various factors such as type of pipe material and location of the waterline. For
example,internal bond clips may be appropriate if the waterline diameter is large enough for internal access and is
located under a major roadway,while external bond clips may be more appropriate if the waterline can't be taken
out of service to install internal clips. For safety reasons,internal and external bond clips may not be recommended
for waterlines at water crossings.
Activity 2.3—Corrosion Survey
When there is concern regarding the condition of underground piping due to possible corrosion,a process known as
External Corrosion Direct Assessment(ECDA)is utilized to identify,locate,and assess the severity of existing external
corrosion and the likelihood of near-term failures. The ECDA is performed in two phases.
Phase 1 — Indirect Assessment. This phase utilizes various ground surface techniques to identify the
corrosiveness of the soils and locate active corrosion cells. This assessment identifies the relative corrosivity
of the soils along the pipeline and provides locations(indications)where active corrosion cells are expected
to be found. The indications may give a sense of the relative severity of the various corrosion cells, but they
cannot be translated into actual area or depth of corrosion. In some cases,this level of condition knowledge
is adequate for the client's planning purposes.
Phase 2—Direct Assessment. If the Indirect Assessment determines a more detailed assessment is required,
then the study proceeds to the Direct Assessment phase. Here, several of the locations are selected for
further study. The number of locations selected depends on the length of pipeline,variability of the soils,
and variability of the indications. The selected indications are excavated, and the pipe is examined for
corrosion.
The results of these examinations are then applied to the complete Indirect Assessment to arrive at a detailed
assessment of the entire pipeline.
Activity 2.4—Progress Workshop
LAN staff will complete one (1) workshop / meeting with city engineering and operations department staff to
summarize the results of the Indirect Assessments completed on the three existing water lines and discuss the
approach for the direct assessments to be completed in Task 3. LAN will coordinate with the City's Project Manager
and Operations Department staff to identify the needs, resources, and key coordination items, if necessary. LAN
will provide meeting agenda and minutes for this workshop.
Task 3-Field Investigations(Direct Assessment Waterlines)
After analyzing data from the indirect and field investigations above, locations of suspected external corrosion will
be recommended for further field investigation and Direct Assessment.
Activity 3.1-Exterior Pipe Observations
In Task 2.4 LAN will recommend locations of pipeline to expose the exterior, however for the purposes of this
proposal, LAN assumes the following exterior pipe observations:
• 48-inch Steel WL along Leopard Street -6,323 LF=2 observations
EXHIBIT A
Page 4 of 6
• 30-inch Ductile Iron WL across Cayo Del Oso—2,961 LF=2 observations(one on each shore)
• 24-inch Steel WL across Laguna Madre—14,741 LF=2 observations(one on each shore)
Note 1 — The City of Corpus Christi(or designated contractor) will provide labor, equipment, materials, and other
resources necessary to excavate and expose the pipeline and restore pipe coatings and the site.
**LAN understands that assistance from the City of Corpus Christi Maintenance of Lines personnel will
depend on real conditions and availability of working crews.**
LAN will perform observations of bedding,backfill,groundwater,and pipe coating conditions at each excavation. In
addition, small areas of the pipe's external coating may be removed to permit LAN staff to perform ultrasonic
thickness testing to measure the pipe wall thickness and identify the extent of any corrosion present.
These locations may also be selected to install cathodic protection test stations for further testing.
Activity 3.2—Internal Manned Entry Assessments of Pipe Condition
Internal inspection,both manned entry and remote inspection methods,is not included in Task Order No. 1 but will
instead be included in a separate task order and discussed during the progress workshop(Task 2.4).
Task 4-Analysis and Recommendations
Activity 4.1—Draft Memorandum
LAN will compile the data collected in the previous tasks and from the Workshop in Task 2.4,provide an preliminary
evaluation of the pipe integrity and report our findings and recommendations in a Draft Technical Memorandum
LAN will complete a DRAFT Technical Memorandum that includes a summary of findings and results of the analysis
and services performed in Task 1,2 and 3.1 above. This report will include:
• Executive Summary
• Summary of Findings
• Recommendations for Internal Observations(both manned entry and remote methods)
• Recommendations for Improvements/Repairs
• Opinions of Probable Construction Costs
• Third-Party Testing Requirements
Activity 4.2—Quality Control/Review
Per LAN Quality Assurance/Quality Control Standards we will include a detailed internal quality control review at
the conclusion of this task. This review will be led by our Senior Water Conveyance Technical Advisor.
Activity 4.3—City of Corpus Christi Review Meeting
At the conclusion of the tasks above,it is assumed the City will review the LAN submittal and provide comments and
those comments will be incorporated into the FINAL Memorandum. LAN will attend one(1)project review meeting
with City staff to review and receive City comments on the DRAFT Report.Any significant modifications or additions
to the work will be addressed at this time.
EXHIBIT A
Page 5 of 6
Activity 4.4—Final Technical Memorandum
LAN will assimilate City review and provide one(1)set of the FINAL Memo(one electronic(PDF)and one hard copy
using City Standards,as applicable)suitable for reproduction.
B. Basic Services to be performed under separate Task Order:
Task 2 above will include a Workshop with City staff that will recommend the approach and methodologies used for
direct waterline assessments. The scope of internal manned and remote assessments is difficult to quantify until
indirect assessments and direct exterior assessments are completed. Because of this, LAN assumes that this work
will be completed under a separate Task Order once the scope is better defined in Task 2:
• Internal assessment via Manned Entry
• Internal assessment via Remote Assessments via CCTV or other technologies
• Determine Pipe Interior Roughness Coefficient(C-Factor)
C. Summary of Fees:
LAN proposes to complete this Task Order on a lump sum basis for a total contract amount not-to-exceed
$156,540.00. The following table summarizes the fees associated with each task under this proposal:
Task Proposed Fee
Task 1—Desktop Investigations $18,770.00
Task 2-Field Investigations-Indirect $73,170.00
Task 3—Field Investigations-Direct $27,140.00
Task 4—Analysis/Tech Memo $37,460.00
Total $156,540.00
D. Project Schedule:
Task Duration Cumulative Project
Item No Task Description (work weeks) Schedule(work weeks)
1 NTP 0 0
2 Data Collection&Kickoff 3 3
Field Investigation/Corrosion
3 Surveys 2 5
4 Progress Workshop 1 6
5 Direct Field Investigations 2 8
Analysis and Develop Tech
6 Memo 2 10
7 City Review of Report 3 13
8 Deliver Final Report 1 14
EXHIBIT A
Page 6 of 6