Snoqualmie Falls Hydroelectric Project 

Visit Snoqualmie Falls

Puget Sound Energy's Snoqualmie Falls Hydroelectric Project, built in the late 1890s about 30 miles east of Seattle, is one of the Pacific Northwest's oldest hydropower facilities and home to the world's first hydroelectric plant built completely underground. The energy project's Snoqualmie Falls Park and its trails are open for day use year-round. The park is one of the region's most-visited tourist destinations. Map it.


Watch the video below for a virtual tour of the historic Snoqualmie Falls Hydroelectric Project.


Above the falls is the two acre Snoqualmie Falls Park with observation areas and signboards about the history and operations of the facility. A new boardwalk connects the upper area to a lower level observation platforms allowing visitors to view the falls from the bottom. Parking is available at both levels of the park.


Through early 2013 a major redevelopment project overhauled the hyrdrofacility and surrounding parklands. More

Video Gallery

June 10, 2010

A Virtual Tour of Snoqualmie Falls Hydroelectric Project

Take a virtual tour of the world's first hydropower plant built completely underground, the Snoqualmie Falls Hydroelectric Project. Constructed in 1898-99 in the Cascade Mountains east of Seattle, the project's original Plant 1 powerhouse -- still operational today -- lies inside a bedrock cavity 260 feet below ground along the edge of Snoqualmie Falls. The Puget Sound Energy project's public park and trails are one of the Northwest's most-visited tourist destinations.

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