Calligan Creek Hydroelectric Project
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The Calligan Creek Hydroelectric Project is a 6 MWe Pelton wheel run-of-the-river hydroelectric power station in Western Washington. It is operated by the Snohomish County Public Utility District on a tributary of the Snoqualmie River in King County, Washington, approximately 30 miles (48 km) east of Seattle. The power station has been operational since February 2018.[1][2] As of year-end 2024, the project produces 17,156 MWh of power per year.[3]
Construction involved building a 45-foot (14 m) wide, 8-foot (2.4 m) tall weir for the water not diverted through the turbine to flow over; a fish ladder; a 1.2-mile (1.9 km) penstock; a powerhouse; and 2.5 miles (4.0 km) of transmission line to interconnect with the grid.[4]
