TRWD/DWU Integrated Pipeline Project Section 15-1

CLIENT NAME

Lockwood, Andrews & Newnam

LOCATION

Navarro County, Texas
United States

PRACTICE AREA

Pipelines

SERVICES INCLUDED

Design 

Construction Management

Environmental 

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Tarrant Regional Water District (TRWD) and Dallas Water Utilities (DWU) partnered to develop the Integrated Pipeline (IPL) Project to bring raw water from their East Texas sources (Richland-Chambers Reservoir, Cedar Creek Reservoir, and Lake Palestine) to the Metroplex. The overall project consists of 150 miles of pipeline, three new lake pump stations, and three new booster pump stations with the capacity to deliver up to 350 million gallons per day (mgd). The IPL Project will be constructed in phases, with a combined estimated construction cost of more than $2 billion.

Plummer served on the design team for IPL Section 15-1, which encompassed more than 15miles of 108-inch diameter pipeline. Plummer provided the following services:

  • Preliminary and detailed design for approximately 5 miles of 108-inch diameter pipeline, including options for steel or pre-stressed concrete cylinder pipe
  • Structural design for a pipeline interconnection and energy dissipation facility
  • Environmental analysis along the full length of Section 15-1
  • Restoration/erosion protection design for all creek crossings

The Richland-Chambers intertie connects the existing 90-inch TRWD transmission pipeline with the new 108-inch IPL and will be required to continuously dissipate approximately 40 psi of operating pressure through the entire range of flow from 0 to 150 mgd. This design required multiple orifice plates in series with control valves to dissipate the pressure head without cavitation while maintaining stable control at the Richland-Chambers raw water intake pump station.

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