Snoquamie Falls Project: Plants

Snoqualmie Plant 1 consists of:

a concrete intake structure located about 300 feet upstream from Snoqualmie Falls; two steel penstocks; an underground powerhouse containing five generating units with a total installed capacity of 11.9 MW; and a tailrace tunnel which returns the flow to the plunge pool for Snoqualmie Falls. Power generated by Plant 1 is transferred by a 115-kilovolt (kV) transmission line to the Snoqualmie Falls Switching Station.

Snoqualmie Plant 2 consists of:

a concrete intake structure located about 200 feet upstream from Snoqualmie Falls; a concrete-lined tunnel that conveys water from the intake to a small project forebay; a steel penstock that conveys water to generating unit one; two steel penstocks combining into a steel penstock that conveys water from the forebay to generating unit two; and a powerhouse containing the two generating units with a total installed capacity of 32.5 MW; and a very short tailrace that returns the flow from the powerhouse directly to the Snoqualmie River about 1,550 feet downstream from the Falls. Power generated by Plant 2 is transferred by a 115-kilovolt (kV) transmission line to the Snoqualmie Falls Switching Station.