Alder: Nisqually River, WA
Completed in 1945, the 330-foot concrete arch Alder Dam is located on the Nisqually River, approximately 38 miles southeast of Tacoma, Washington. Alder Dam is part of the Nisqually River Hydroelectric Project.
Tacoma Power
Wynoochee: Wynoochee River, WA
The Wynoochee Dam Hydroelectric Project refitted an existing U.S. Army Corp of Engineers flood control dam located on the Wynoochee River in the foothills of the Olympic Mountains in Grays Harbor County, 35 miles north of Montesano, Washington.
Mayfield: Cowlitz River, WA
Located 65 miles south of Tacoma, Washington, Mayfield Dam is part of the two-dam Cowlitz Hydroelectric Project. Construction began in 1955 and power generation began in 1963.
LaGrande: Nisqually River, WA
The LaGrande Dam is part of the Nisqually Hydroelectric Project on the Nisqually River. LaGrande Dam is downstream from Alder Dam and is located 36 miles southeast of Tacoma, Washington.
Cushman 2: Skokomish River North Fork, WA
Tacoma City Light built, owns and operates the Cushman Hydroelectric Project, which consists of two dams on the North Fork of the Skokomish River, located on the Olympic Peninsula near the town of Hoodsport.
Cushman 1: Skokomish River North Fork, WA
Tacoma City Light built, owns and operates the Cushman Hydroelectric Project, which consists of two dams on the North Fork of the Skokomish River, located on the Olympic Peninsula near the town of Hoodsport.
Mossyrock: Cowlitz River, WA
On the Cowlitz River, 13 miles upstream from the Mayfield Dam, Mossyrock Dam began generating power in 1968. It rises 605 feet from bedrock and created 23-mile long Riffe Lake. It is the highest dam in the Pacific Northwest.