Explore the largest hydro power plants in Washington and see all the utility-scale hydro projects in Washington on a map.
Last updated: May 2026
On this page, you can explore our real-time database of hydro power plants in Washington. Each month, we track hydro projects and update our list of the largest hydro power plants in Washington.
As of May 2026, there are 73 utility-scale hydro power plants in Washington, according to Cleanview's project tracker. Their total operating capacity is 21,776 MW.
Total Hydro Power Plants
73
Total Capacity
21,776 MW
Built in 2025
0
Map of hydro power plants in Washington. Marker size reflects capacity — only facilities with reported capacity data are shown.
6,809 MW
Year Operational: April 1984
Location: Grant, Washington
2,456 MW
Year Operational: May 1979
Location: Douglas, Washington
1,349 MW
Year Operational: February 1974
Location: Chelan, Washington
1,220 MW
Year Operational: September 2020
Location: Grant, Washington
1,160 MW
Year Operational: May 1986
Location: Pend Oreille, Washington
950 MW
Year Operational: July 1961
Location: Grant, Washington
867 MW
Year Operational: January 1969
Location: Chelan, Washington
810 MW
Year Operational: June 1978
Location: Columbia, Washington
810 MW
Year Operational: July 1979
Location: Walla Walla, Washington
1,220 MW
Year Operational: September 2020
Location: Grant, Washington
6 MW
Year Operational: February 2018
Location: King, Washington
6 MW
Year Operational: February 2018
Location: King, Washington
13 MW
Year Operational: August 2013
Location: King, Washington
104 MW
Year Operational: July 2013
Location: Skagit, Washington
85 MW
Year Operational: March 2013
Location: Mason, Washington
39 MW
Year Operational: February 2013
Location: King, Washington
8 MW
Year Operational: November 2011
Location: Snohomish, Washington
14 MW
Year Operational: September 2006
Location: Yakima, Washington
Cleanview