Power Plants
There are two hydroelectric power plants at Snoqualmie Falls, both currently operated by Puget Sound Energy. Power plant 1 was built in 1898 and operates at the base of the falls embedded in the rock 270 feet (82 m) below the surface. It was the world's first completely underground power plant. Power plant 2 was built in 1910 and further expanded in 1957, and is located a short distance downstream of the falls. Approximately 1% of Puget Sound Energy sales comes from the plant. These two power plants provide 41,990 kilowatts of electricity, which is enough to service 16,000 average homes.
The 1898 generating system was designated an ASCE Civil Engineering Landmark in 1981.
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