ROV Inspection of the Intake Gate Shaft at Lower Baker

摘要

The 285-foot-high Lower Baker Dam, which creates Lake Shannon on the Baker River in northwest Washington, was completed in 1925. The dam was built by Puget Sound Power & Light Company (now Puget Sound Energy or PSE) to provide electricity for the cement industry in the town of Concrete, Wash. At that time, the concrete arch dam impounded water for a powerhouse with a generating capacity of about 80 MW. In 2013, we added a 30-MW powerhouse to contain Unit 4. Design-build delivery of this new powerhouse was spawned by a need to improve flow releases for better movement of migratory salmon.1 Lower Baker Dam and hydro plant is part of the combined Baker River facilities, along with the 90-MW Upper Baker hydro project and dam, which were completed in 1959.