Power Plant--how many people to support?

This is one of two power plants at Snoqualmie Falls, WA. Visitors park across the street and hike over an overpass to see the falls. A trail leads down the cliffside to the Snoqualmie River edge, with a boardwalk for much of the way. The trail is steep but features such fun visits as seeing the two power plants and the generators spinning effortlessly, no one much arooud.