The City of Big Spring hired Parkhill, Smith and Cooper in 2014 to design the second phase of the major upgrade to the city’s WWTP. The upgrades were required so that the city could continue to provide treated effluent to the Canadian River Municipal Water District (CRMWD) for potable reuse.

The project consisted of three major components:

  • New Headworks Facility
    • Includes a new raw sewage submersible lift station to pump the 3.8 million gallons per day (MGD) average flow, and the 11.4 MGD peak flows form the City of Big Spring. Course and fine screens as well as a new Eutek Grit System were installed to screen debris out of the wastewater prior to entering the WWTP.
  • New Aeration Blowers
    • Three new aeration blowers were installed at the aeration basin. The new blowers are much more efficient with power usage and produce much less heat than the original blowers.
  • New Sludge Belt Filter Press
    • A new 2-meter Ashbrook Belt Filter Press was installed to dewater both waste activated and primary sludge from the WWTP process without having to send the sludge to the existing digesters for additional treatment.

PSC proceeded with design, bidding and construction of the headworks improvements to the WWTP. The project was completed within two months of the original 15-month schedule due to weather days and other minor issues. The project was a rehabilitation of an existing plant and experienced approximately 3 percent of the original project bid in change orders—most of which were minor utility issues uncovered during the excavation portions of the project.