Regional Water System
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Texoma Raw Water Pipeline No. 2 and Texoma Raw Water Pipeline to Leonard Water Treatment Plant (WTP) Pipeline - Request for Authorization to allow use of Alternate Project Delivery Method; Project No. 101-0633-23 and No. 101-0642-24; Resolution No. 24-48
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SUBJECT
recommendation
Authorize the use of Construction Manager at-Risk (CMAR) project delivery method for the Texoma Raw Water Pipeline No. 2 and the Texoma Raw Water Pipeline to Leonard Water Treatment Plant (WTP) Pipeline project.
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PURPOSE
The use of CMAR project delivery method will provide the best value to NTMWD and in this case the opportunity to combine these two similar capital projects to leverage the advantages of early procurement of certain long lead time materials and equipment. This allows the procurement process to progress concurrently with the detailed design, helping to compress project schedule.
RECOMMENDATION
The Executive Director and NTMWD staff recommend the Board of Directors adopt Resolution No. 24-48, A Resolution authorizing the use of this alternative delivery approach in accordance with Texas Government Code Chapter 2269, Contracting and Delivery Procedures for Construction Projects.
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Project: |
No. 101-0633-23, Texoma Raw Water Pipeline No. 2 and No. 101-0642-24, and Texoma Raw Water Pipeline to Leonard WTP Pipeline |
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Committee: |
This will be an item on the November 20, 2024, Water Committee meeting agenda |
DRIVER(S) FOR THIS PROJECT
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Strategic Objective: |
1.1 High Quality Services 1.4 Reliable and Resilient System Capacity |
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☐ Regulatory Compliance |
☐ Asset Condition |
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☒ Capacity |
☒ Redundancy/Resiliency |
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☐ Relocation or External Requests |
☐ Operational Efficiency |
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☐ Safety |
☐ Administrative |
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☐ Policy |
☐ Other _____________ |
BACKGROUND
The Texoma Raw Water Pipeline No. 2 increases the capacity of raw water transfer from Lake Texoma to the NTMWD treatment facilities. To meet projected future demand, a new 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 WTP’s and divert approximately 70 MGD of additional flow to the Leonard WTP.
To increase the utilization of raw water rights, water from Lake Texoma will be blended with raw water from Bois d’Arc Lake at the Leonard Water Treatment Plant Facility. This additional supply will fully utilize the planned future treatment plant capacity of 280 MGD. Texoma to Leonard Raw Water Pipeline will also be an 84-inch gravity line connecting to the existing Texoma Raw Water Pipeline south of Howe Reservoir to convey water to Leonard Terminal Storage Reservoirs.
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. Preliminary engineering analysis has identified a proposed 27-mile route within the existing pipeline corridor and within a rerouted section. The engineer’s opinion of the construction cost for the Texoma Raw Water Pipeline No. 2 is $302 Million.
• In January 2024, the Board approved Administrative Memorandum No. 24-5978 authorizing preliminary engineering design for the Texoma Raw Water Pipeline to Leonard WTP Pipeline project to transport approximately 70 MGD of Texoma raw water through an 84-inch pipeline to the Leonard WTP Balancing Reservoir. The Texoma Raw Water Pipeline to Leonard WTP Pipeline has an engineer’s opinion of a construction cost of $108 Million.
• These two pipelines will convey Raw water from Lake Texoma to different components of the District’s system. With the same diameter, pipeline materials, and proximity in the region; combining these two projects into a single construction contract was evaluated and recommended herein.
PROJECT COMPONENTS
• This action seeks the Board’s authorization for the use of the alternative delivery approach for two pipeline projects with similar construction materials and components.
• Future actions dealing with selection of a CMAR and Authorization of CMAR Preconstruction and Procurement Services will be presented at a later time. Other subsequent recommendations dealing with construction Work Packages will also be brought at a later time.
FUNDING
None required at this time.