Colville Wastewater Treatment Plant

Construction of a new 1.45 Million Gallon per Day (5.33 MGD peak flow) activated sludge wastewater treatment plant.

  • removal of the preload material on the existing site
  • excavation for eleven new structures and associated dewatering
  • underground process piping and structure under drainage system
  • construction of 1 concrete selector tank structure, 2 concrete clarifier structures, 1 concrete re-aeration basin structure
  • 1 influent pump station, 1 UV/RAS building, 1 pretreatment building, and 1 head works building
  • supply and installation of process equipment, electircal and controls, site improvments, untility and raod improvemnts
  • 40 acres of lagoon modificaitons

The contract duration was 28 months. Apollo completed the project in 18 months.