Trinity River Main Stem Pump Station and Pipeline

Project Overview

NTMWD is a state leader in water reuse and the Trinity River Main Stem Pump Station and Pipeline project will allow us to expand our water reuse supplies. Key project components include an up to 100 million gallons per day (MGD) pump station and 17 miles of 72-inch-diameter pipeline.

To make this project possible, NTMWD is contracting with the Trinity River Authority to purchase 50 MGD of treated effluent flows in the main stem of the Trinity River.

Once construction is complete in early 2019, the Main Stem Pump Station and Pipeline will divert river water to the East Fork Reuse Project, commonly known as the “wetlands,” which will use natural filtration to further cleanse the raw water. As the water passes through 1,840 acres of wetlands, the aquatic plants and sunlight will help filter the water through a natural process that removes about 95 percent of the sediment, 80 percent of the nitrogen and 65 percent of the phosphorus. The cleansed water from the wetlands will then be piped 40 miles through an existing pipeline to the north end of Lavon Lake and blended with our other raw water sources.

By the Numbers

Pump Station

  • 13-acre site
  • Two 48-inch diameter pipes will divert water from Trinity River into pump station
  • 4 pumps, 1500 horsepower each
  • 100 million gallons per day (MGD) capacity
  • Garney – Construction Manager At Risk (CMAR)
    • FSG Electric supporting contractor for power – based in Ft. Worth
    • BAR Constructors – supporting contractor for structural components of pump station – based in Lancaster
    • About 50 workers per day on construction site currently
    • Will increase to about 100 per day during peak construction
  • Adding two new 3500-horsepower pumps to existing Conveyance Pump Station to pipe water from the wetland near Seagoville north to Lavon Lake

Pipeline

  • Nearly 17 miles of 72-inch diameter pipeline
    • 2100 pieces of pipe (primarily 50 feet in length)
    • Mortar-lined, spiral-welded steel pipe
    • Over 60 air-release and blow-off valves
    • Pipe manufactured by two north Texas companies:
      • Northwest Pipe (Saginaw)
      • Forterra Pressure Pipe (Grand Prairie)
    • Most of pipeline installed with 5 feet average cover
    • About 40 workers on two different pipeline construction sites
  • 13 tunnels under roads or waterways
    • Longest tunnel (600 feet) crosses under road and levee close to new pump station
    • Second longest tunnel (570 feet) under Hwy 175
    • Tunnel under Trinity River (305 ft)