Stone Creek Hydroelectric Project
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Location:
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Clackamas River
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Nearest town:
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Estacada, OR
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Capacity:
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12 MW
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Date built:
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Completed in 1993 by an independent power producer and purchased by EWEB in 1994
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Licensed through:
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2038
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The project lies between Portland General Electric's (PGE) Timothy Lake and PGE's
Oak Grove Hydroelectric Project.
Water is diverted from the Oak Grove Fork of the Clackamas River just downstream
from its junction with Stone Creek, which is about one mile downstream from Timothy
Lake. It's considered a run-of-the-river project capable of producing 12 megawatts
peak, with an average production of 8 megawatts.
The Stone Creek Hydroelectric Project consists of the following facilities:
- 300-foot long, 12-foot high diversion dam and fish ladder
- 4.6-mile, 6-foot diameter steel penstock that carries water from the diversion dam
to the power plant
- A power plant that contains one vertical shaft Pelton turbine driving a synchronous
generator rated at 12 megawatts
- A substation
- A 17-mile 34.5 kilovolt (kV) transmission line, half of which is underground and
the remainder overhead. The transmission line terminates at PGE's Harriet Substation.
The power generated at Stone Creek is wheeled through PGE and Bonneville Power Administration
transmission lines to EWEB.
