Regional Water System
title
Texoma Raw Water Pipeline No. 2; Project No. 101-0633-23; Engineering Services Agreement, Final Engineering
end
SUBJECT
recommendation
Authorize funding in the amount of $13,870,650 for a final Engineering Services Agreement with Black & Veatch Corporation for final design of the proposed Texoma Raw Water Pipeline No. 2.
end
PURPOSE
The Texoma Raw Water Pipeline No. 2 will parallel the existing Texoma Raw Water Pipeline and provide additional capacity to NTMWD’s water transmission system from the Lake Texoma Pump Station to the water treatment facilities in Wylie and Leonard. The Texoma Raw Water Pipeline No. 2 will also allow for operational flexibility in continuity of service during the period when NTMWD staff is performing assessment and/or maintenance to extend the life of the existing Texoma Raw Water pipeline.
RECOMMENDATION
The Executive Director and NTMWD staff recommend the Board of Directors authorize the Executive Director to execute an engineering services agreement (ESA) as follows:
|
Consultant: |
Black & Veatch Corporation |
|
|
|
|
Scope: |
Final engineering design |
|
|
|
|
Project: |
101-0633-23, Texoma Raw Water Pipeline No. 2 |
|
|
|
|
Amount: |
$13,870,650 |
|
|
|
|
Committee: |
This will be an item on the January 22, 2025, Water Committee meeting agenda |
DRIVER(S) FOR THIS PROJECT
|
Strategic Objective: |
1.1 High Quality Services 1.4 Reliable and Resilient Systems |
|
☐ Regulatory Compliance |
☐ Asset Condition |
|
☒ Capacity |
☒ Redundancy/Resiliency |
|
☐ Relocation or External Requests |
☐ Operational Efficiency |
|
☐ Safety |
☐ Administrative |
|
☐ Policy |
☐ Other _____________ |
BACKGROUND
Since 1992, NTMWD has been conveying water from Lake Texoma through the 72-inch Texoma Raw Water Pipeline for eventual treatment at the NTMWD Wylie Water Treatment Plant. The 2021 “Lake Texoma Pump Station Updated Improvements Plan” and the 2022 “NTMWD Raw Water Supply Operations with Bois d’Arc Lake and the Leonard WTP” both include recommendations to increase the raw water conveyance capacity from Lake Texoma Pump Station to the Howe Balancing Reservoir.
The Texoma Raw Water Pipeline No. 2 increases NTMWD’s capability to convey raw water from the Lake Texoma Pump Station to the NTMWD treatment facilities. To meet projected future demand, a parallel 84-inch transmission line from Lake Texoma to the Howe Balancing Reservoir is needed by 2029. With the existing 72-inch line, the proposed 84-inch parallel line, and a separate Texoma Pump Station Improvements project, the District will have the ability to deliver up to 120 million gallons per day (MGD) of raw water from Lake Texoma to the Wylie Water Treatment Plant (WTP) and divert approximately 70 MGD to the Leonard Water Treatment Plant (WTP).
PROJECT PURPOSE
• In December 2023, the Board approved Administrative Memorandum No. 23-5970 authorizing preliminary engineering design for the Texoma Raw Water Pipeline No. 2 project.
• The Texoma Raw Water Pipeline No. 2 project will provide redundancy and resiliency to this portion of the system and will allow the District the ability to perform assessment and/or maintenance of both pipelines, with the ability to maintain one pipeline in service while the other is required to be shut down.
• Preliminary engineering analysis has identified a proposed 27-mile route within the existing pipeline corridor and within a rerouted section. The planning opinion of construction cost for the Texoma Raw Water Pipeline No. 2 is $379 million.
• In October 2024, the Board approved Administrative Memorandum No. 24-6073 authorizing the Right-of-Way Acquisition program for this pipeline project.
PROJECT COMPONENTS
• Final design of 27 miles of 84-inch raw water pipeline from Lake Texoma Pump Station to the Texoma Balancing Reservoir in Howe and associated connections and appurtenances
• Design of cathodic protection system and instrumentation and controls for operations
• Hydraulic Modeling and Surge Analysis
• Local and State Agency and Utility Coordination
• Preparation of bid-ready construction plans and specifications
• Environmental and Cultural Resources Assessment, Compliance and Permitting
• Incorporation of State Water Implementation Fund for Texas (SWIFT) requirements
• Easement acquisition for pipeline corridor, temporary construction, and permanent access
BASIC SERVICES
• Project Management and Administration
• 60% Design Submittal
• 90% Design Submittal
• 100% Final Design Submittal
• Materials Procurement Support
• Bid Phase Services
SPECIAL SERVICES
• Geotechnical and Soil Corrosivity Investigation
• Topographic Survey
• Environmental permitting and Cultural Resources
• Levels A & B Subsurface Utility Engineering
• Instrumentation and Controls Engineering
• Easement Preparation
• Land Acquisition and Real Estate Services
ENGINEERING SERVICES FEE
Description Amount
Basic Services $ 8,609,507
Special Services $ 5,261,143
• Land acquisition and Real Estate services $ 2,255,368
• Other Special Services $ 3,005,775
Requested Amount $13,870,650
FUNDING
This project will serve NTMWD and the Greater Texoma Utility Authority (GTUA). NTMWD and GTUA’s proportionate share of project funding is currently under review. NTMWD is to initially fund this engineering service agreement and seek reimbursement from GTUA when the proportionate cost share has been finalized.
Funding to Black & Veatch Corporation in the amount of $13,870,650 is to be made available utilizing the Regional Water System Extendable Commercial Paper (ECP) Program as the appropriation source; issuance of ECP notes will occur as cash needs arise.