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Draft NPDES Permit for Grand Coulee Dam in Washington

Below is EPA's National Pollutant Discharge Elimination System (NPDES) draft permit and supporting documents for the U.S Bureau of Reclamation Grand Coulee Dam discharging to the Columbia River in Washington and to the Columbia River in Colville tribal waters.

EPA accepted public comments on this draft permit from January 13 through March 30, 2022 (extended from February 28).

Permit number: WA0026867

Related permits:

NPDES Permit for Grand Coulee Dam Wastewater Treatment Plant (WA0024163)

Draft NPDES Permit, Grand Coulee Dam, #WA0026867 (pdf) (January 2022)
Proposed discharge permit.
NPDES Permit Fact Sheet, Grand Coulee Dam, #WA0026867 (pdf) (January 2022)
Technical basis for permit.