HomeMy WebLinkAboutC2017-369 - 6/22/2017 - NA TASK ORDER NO. 14
This Task Order pertains to a Master Services Agreement for Professional Services by and between City of Corpus
Christi, Texas (City) and LNV, Inc. (Consultant) dated August 16, 2016 (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.
PROJECT NAME/NUMBER: Water and Wastewater Treatment On-Call Support, E16264
1. PROJECT DESCRIPTION—This project provides the Utility Department with on-call services to assist with
any technical,operational, maintenance,diagnostic and design concerns for the City's O.N.Stevens Water
Treatment Plant and six wastewater treatment plants.
2. SCOPE OF SERVICES — Hydraulic Modeling of 48-inch Transmission Main Closures
3. COMPENSATION —The total amount not to exceed for Task Order No. 14 only is $16,800.
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 CORPUS CHS LNV, I ►.
,/,7 1 /,' 747 - / j r le It/22,n
Jeff H. E.m`onds, P.E. Dat •;n S. Leyendecker, P.E. •ate
Director of Engineering Services / "resident
801 Navigation, Suite 300
Corpus Christi, TX 78408
(361) 883-1984 Office
loganb@Invinc.com
Fund Name Accounting Unit Account No. Activity No. Amount
Water 2015 CIP 4096-062 550950 E16264-01-4096 EXP $16,800
2017-369
6/22/17
LNV Inc.
INDEXED
City Project No. E16264
Professional Services Contract
City of Corpus Christi
Water/Wastewater Treatment On-Call Support
Task Authorization No. 14 — Hydraulic Modeling of 48-inch
Transmission Main Closures
June 15, 2017
LNV
Task Order No. 14
Exhibit A
Page 1 of 8
VoaP�s c..q
LNV
SCOPE OF WORK
Project No. E16264
Water and Wastewater Treatment On-Call Support
Task Authorization No. 14—Hydraulic Modeling of 48-Inch
Transmission Main Closures
PURPOSE
In response to the City's request, LNV is proposing the following scope of services for the hydraulic
analysis of the closures of the 48" CIP Transmission Main leaving the O. N. Stevens Water Treatment
Plant.The updated 2017 City of Corpus Christi Water Model will be used in the analysis.
The purpose of this task authorization is to provide assistance to City Staff by performing a hydraulic
analysis of the closure of the 48"transmission main at two locations of the main and determine the impacts
of the closure on system pressures in the distribution system.The task also includes an additional evaluation
to determine mitigation strategies in minimizing any potential impacts as a result of the closures.The results
of the modeling support will aid City Staff in taking precautionary measures during the replacement of three
(3)broken 48"gate valves on the transmission main.Two of the three(3)valves are located approximately
1,500 ft from the plant,and the third valve located approximately 750 ft south of the intersection of FM 24
and Mallard Dr. (See the attachment B for locations). The City intends isolating the valves for the
replacement work by closing valves and the installation of line stops of the broken valves.
SCOPE OF WORK
ADDITIONAL SERVICES:
ITEM 6—Capacity Assessment
The Engineer will perfonn the following:
I. Model Preparation
a. Coordinate with City of Corpus Christi staff to determine the recommended valve
closure locations.
b. Create new data sets and change settings in the model to simulate 48"transmission main
closure at the two locations described above.
2. Hydraulic Analysis
2.1 48-Inch Transmission Main Open
a. Create a current maximum day demand(MDD)scenario under a 24-hour duration
extended period simulation(EPS)with the existing water distribution system network.
b. Analyze pressures and flows in the City's distribution system as a typical MDD scenario
when the lines are in service.
Task Order No. 14
Exhibit A
Page 2 of 8
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2.2 48-Inch Transmission Main Closed at Location I (Approximately 1,500 ft from the Plant)
a. Create a current MDD scenario under a 24-hour duration EPS with the 48"main closed
at location 1.
b. Analyze pressures and flows in the City's distribution system when the line is closed.
2.3 48-Inch Transmission Main Closed at Location 2(Approximately 750 ft South of Intersection of
FM 24 and Mallard Dr.)
a. Create a current MDD scenario under a 24-hour duration EPS with the 48"main closed
at location 2.
b. Analyze pressures and flows in the City's distribution system when the line is closed.
This scope of services include up to three(3)scenarios for the analysis which forms the base
scope of services under this evaluation.The Engineer has provided additional scope of works for
simulation of strategies to mitigate any negative impacts on system pressures if needed.This will
be additional to the base scope of service included under Item 6A for the client.
3. Results
a. Create color coded exhibits identifying the pressures at each node in the distribution
system under the EPS demand scenario at for each modeling scenario(total of 1 exhibit
per scenario or 3 total exhibits)
b. Present tables of distribution system settings used during simulations.
4. Meetings and Coordination
a. Coordination with City of Corpus Christi Utilities Department staff to interpret modeling
results and answer questions in preparation of the transmission main shutdown
b. 5 man hours for meetings are included in this scope and fee contract. Any additional
time and/or services are not included in this fee,but can be extended on an hourly rate
basis.
5. Engineering Memorandum
a. Prepare a Draft and Final engineering memo delivered to the City for inclusion in the
project's engineering report. It shall include the following sections 1)Model
Preparation,2)Model Scenario Descriptions,and 3)Modeling Results.
NOTE:The modeling analysis for the transmission main closures for the two locations will be modeled
as two(2)separate standalone scenarios and not as a combined analysis. It is also important to indicate
that this proposal does not include the analysis of water quality impacts.
ITEM 6A—Evaluate Mitigation Strategies(Additional Services)
If requested, Engineer will perform the following additional services to the base services provided above
should the evaluation of mitigating strategies be needed.These services are:
1. Create New Data Set and Hydraulic Analysis
2 Task Order No. 14
Exhibit A
Page 3 of 8
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a. Create new data sets and change settings in the model to simulate 48"transmission main
closure at the two locations described above.
b. Simulate and evaluate up to 2 mitigation strategies for minimizing the impact due to the
transmission main closure for each location.For modeling purposes,specific conditions
in mitigating the potential impacts as a result of the main closures will be determined by
the City.
2. Results
c. Create color coded exhibits identifying the pressures at each node in the distribution
system under the EPS demand scenario at for each modeling scenario(total of 1 exhibit
per scenario or 4 total exhibits)
d. Present tables of distribution system settings used during simulations.
DELIVERABLES
The Engineer will prepare a DRAFT memorandum for the City's review and comment. Upon receipt of
comments, the Engineer will incorporate the comments and submit one (1) hard copy of the FINAL
memorandum.
SCHEDULE
The Engineer's services shall be performed in a timely manner consistent with sound professional practices.
The Engineer will complete the work according to the following schedule:
Activity Completion Date
Execution of Task Authorization - Notice to TBD
Proceed(NTP)
Item 6—Capacity Assessment(Base Services)
• DRAFT Memorandum 14 days after NTP
• FINAL Memorandum 21 days after NTP
Item 6A — Evaluate Mitigation Strategies TBD
(Additional Services)
The time limits set forth in the schedule shall include allowances for reasonable and expected review time
by the City and approval by authorities having jurisdiction over this project, and shall not be allowed as
cause for delay or adjustments to the schedule. Delays caused by review times by the City exceeding those
anticipated by the Engineer's schedule are cause for adjustments in the schedule. Any adjustments made
to the agreed upon schedule shall be made in writing and accepted by both parties.
The Engineer shall begin work immediately upon receipt of the executed Task Authorization and/or Notice
to Proceed(written or emailed).
3 Task Order No. 14
Exhibit A
Page 4 of 8
'SUS Ch
LNVJ •
FEE
The services will be provided on a Time and Materials (T&M) basis as the project is moved towards
completion. The anticipated amount for the base task authorization is $10,640 and an additional services
authorization of$6,160, as shown inATTACIU(MENT A. If the level of eflort exceeds the estimates
provided,a separate task authorization will he requested.
TASK AUTHORIZATION MANAGER
The Task Authorization Manager will be the primary contact person during the performance of this work.
All correspondence or inquiries should be addressed to the Task Authorization Manager. This work task
will be coordinated by:
Daniel Grimsbo. P.E. A.I.C.P.
Executive Director of Water Utilities Department
City of Corpus Christi
Office: 361-826-1874
Fax: 361-826-1889
Email: DanO@cctexas.com
APPROVAL
The undersigned has reviewed and approved this Task Authorization and recontm• • NV. Inc. to
perform the work as presented:
IZecoi icnded by:
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Task Order No. 14
Exhibit A
Page 5 of 8
Attachment A
Task Authorization No. 14
Man-hour and Fee Analysis
Task
LNVInc.
Description
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Su6tntal
ITEM 6
40' Transmission Main Closure Modeling
(Base Services)
1
Model preparation
5
5
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5 1.40
$
5
4
0 7.00000
2
R draulil Analysis
S
S
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5 2.010
5
5
16
S 2.00000
3
Results
5
4
5
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7.140
5
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5
20
S 3.31000
4
Meetings and Support
5-
2
5
am
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5
5
5
5
5 54000
5
Engineering Memorandum
5
1
5
700
5 14O
5
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5 1.00000
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$
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ITEM 6A
Evaluate Mitigation Strategics
(Additional Serve (CS)
Develop Scenarios
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$ 411000
Task Order No. 14
Exhibit A
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EXHIBIT B
TASK ORDER SUMMARY
MASTER SERVICE AGREEMENT
WATER AND WASTEWATER ON-CALL SUPPORT
PROJECT NO. E16264
TASK NOT TO
ORDER EXCEED
DESCRIPTION AMOUNT AMOUNT
Original Contract(June 2,2016) $35,000
Amendment No. 1 Master Service Agreement(August 16, 2016) $600,000
Maximum Contract Amount $635,000
TASK ORDERS:
Task Order No. 1 $14,914
Greenwood Wastewater Treatment Plant Generator Sizing
Task Order No.2 $14,575
Whitecap Wastewater Treatment Plant South Clarifier Scum System Rehab
Task Order No. 3 $24,350
Electrical Support for ONSWTP Intermediate Sludge Removal Phase 1
Task Order No.4 $167,588
Water System Operations Monitoring and Support
Task Order No. 5 $33,524
Public Communication on City-Wide Water Quality
Task Order No.5B $10,996
Public Communication on City-Wide Water Quality
Task Order No. 6 $21,373
Monthly Water Quality Mtgs and Alt ONSWTP Residuals Mgmt Evaluation
Task Order No. 7 $45,792
Implementation and Administration of General Engineering Services
Task Order No. 8 $61,380
Planning Level Assessment of ONSWTP Chlorine Gas System
Task Order No. 9 $7,052
ONSWTP Facilities Optimization Plan Update
Task Order No. 10 $13,332
Distribution System Control Strategy
Task Order No. 11 $7,090
Foundation Design&Windstorm Inspection/Certification for FRP Bldg at ONSWTP
Task Order No. 14 16,800
Hydraulic Modeling of 48-inch Transmission Main Closures
Task Order Total $438,766
Amount Remaining on Contract $196,234