Upper East Fork Interceptor System
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Preston Road Lift Station Peak Flow Storage Tank; Project No. 501-0668-25; Engineering Services Agreement - Final Engineering
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SUBJECT
recommendation
Authorize funding in the amount of $2,186,300 for an engineering services agreement to HDR Engineering, Inc., for final design of the Preston Road Lift Station Peak Flow Storage Tank.
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PURPOSE
This project, in combination with other projects, is necessary to meet the wet-weather wastewater flow projections in this portion of the Upper East Fork Interceptor System. Without the peak flow storage tank, the projected inflows to the Preston Road Lift Station will exceed the firm capacity of the lift station.
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:
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Consultant: |
HDR Engineering, Inc. |
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Scope: |
Final Engineering Design |
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Project: |
No. 501-0668-25, Preston Road Lift Station Peak Flow Storage Tank |
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Amount: |
$2,186,300 |
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Committee: |
This will be an item on the March 25, 2026, Wastewater Committee meeting agenda |
DRIVER(S) FOR THIS PROJECT
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Strategic Objective: |
1.2: Successfully Deliver Capital Program 1.4: Reliable and Resilient Systems |
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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 Preston Road Lift Station (PRLS) serving the Upper East Fork Interceptor System (UEFIS) is in the City of Plano, has a design firm capacity of 30.0 million gallons per day (MGD) and conveys flow through two force mains: the Preston Road Force Main (FM) and the 121 FM.
• The Preston Road FM sends flow to the Russell Creek Interceptor and the Wilson Creek Regional Wastewater Treatment Plant and has a maximum capacity of 8 MGD. The 121 FM send flows to the Wilson Creek FM and the Wilson Creek Regional Wastewater Treatment Plant and has a capacity of 22.0 MGD.
• Due to evolving growth and service demands in the UEFIS, the station capacity must be increased to accommodate future peak flows.
• The UEFIS Regional Capacity and Assurance Report and the subsequent conceptual design report by HDR recommend a peak flow storage tank and ancillary structures adjacent to the PRLS site. The tank design criteria include provisions for attenuation of near-term peak flow of 47.5 MGD with the flexibility to be expanded in the future with the addition of a peak flow pump station.
PROJECT PURPOSE
• The PRLS needs to increase its capacity to handle future peak wastewater flows due to growing service demands in the UEFIS by constructing a below-ground peak flow storage tank with an initial capacity of 4 million gallons (MG), expandable to 11 MG in the future by adding a peak flow pump station. This project ensures the PRLS can manage increased flows and meet future service requirements and enhances the overall efficiency and reliability of our wastewater management system.
• The planning level estimated cost is $59,000,000.
• Tentative schedule is to have peak flow tank in service before end of 2029.
PROJECT COMPONENTS
• Peak flow storage tank with an initial capacity of 4.0 MG, gravity-in, gravity-out and pump-out arrangement, expandable to 11.0 MG with the addition of a peak flow pump station in the future.
• Drain pump station to return remaining volume after gravity drain.
• Influent junction structure to divert flow to the peak flow storage tank.
• Odor control system duct improvements to serve the influent junction structure.
• Odor control system to serve the peak flow storage tank and drain pump station.
• On-site stormwater detention pond.
• Yard Piping.
BASIC SERVICES
• Project Management, coordination and design review workshops
• Final engineering design services
• Bid phase services
SPECIAL SERVICES
• Permitting fee allowance
• Local agency coordination
• City of Plano Parks easement coordination
• Flood study
• Site plan preparation
ENGINEERING SERVICES FEE
Description Amount
Basic Services $1,951,300
Special Services $235,000
Requested Amount $2,186,300
FUNDING
Funding in the amount of $2,186,300 to HDR Engineering Inc is to be made available from the Upper East Fork Interceptor System Construction Funds.