The Town of Coulee Dam owns and operates a facility that treats wastewater from domestic, industrial, and commercial sources. The facility discharges secondarily treated wastewater throughout the year to the Columbia River for a service population of 1300. Disinfection is by sodium hypochlorite. The design flow of the wastewater treatment plant is 0.50 million gallons per day.
A new treatment plant will begin operation March or April, 2018 with a design flow of 0.195 mgd. The new plant will discharge secondarily treated wastewater throughout the year to the Columbia River. Disinfection will be by ultraviolet radiation.
The Region 10 Office of EPA has tentatively determined to reissue a discharge permit to the above listed applicant.
Electronic copies of the draft permit and technical fact sheet are available under "Related Documents" below. Copies are also available for review between 8:30am-4:30pm at EPA's Seattle offices:
U.S. EPA Region 10
1200 Sixth Avenue, Suite 900
Seattle, Washington, 98101
The draft permit and fact sheet are also on file at:
Office of Environmental Trust
Confederated Tribes of the Colville Reservation
PO Box 150
Nespelem, WA 99155
Copies and other information may be requested by writing to the EPA at the above address to the attention of the NPDES Permits Unit, or by contacting Audrey Washington (firstname.lastname@example.org), (206) 553‑0523.