N end of Lake Mills at Elwha River, Port Angeles, Washington. County/parish: Clallam.
Removed from the National Register of Historic Places August 26, 2014. NRIS 88002742.
Part of Hydroelectric Power Plants in Washington State, 1890-1938 MPS (NRIS 64500703).
1 contributing building. 5 contributing structures.
Glines Canyon Dam, also known as Upper Elwha Dam, was a 210-foot (64 m) tall concrete arch dam that impounded Lake Mills reservoir on the Elwha River in Clallam County, Washington. As of 2025, it is the tallest dam ever to be intentionally breached.
Built in 1927, Glines Canyon Dam was located 13 miles (21 km) upriver from the mouth of the Elwha River at the Strait of Juan de Fuca, and about 8 miles (13 km) upriver from Elwha Dam. Both dams lay within Olympic National Park, established in 1938. The National Park Service demolished Glines Canyon Dam in 2014 as part of the restoration of the Elwha River (Elwha Dam was demolished in 2011–2012). The project was the largest dam removal in history until the restoration of the lower Klamath River in the 2020s.
(read more...)National Park Service documentation: https://catalog.archives.gov/id/75610900