Oak Grove Hydroelectric Project
The Oak Grove Hydroelectric Project is a 44 megawatt hydroelectric plant operated by Portland General Electric (PGE) on the Oak Grove Fork Clackamas River. Water for this project is held by three lakes, built between 1923 and 1956.[1] The dam creates the impoundment Lake Harriet.
History
In 1907, the Southern Pacific Company began to acquire water rights for the Oak Grove fork.[2] These rights were transferred in 1911 to the Portland Railway, Light and Power Company,[2] which later became PGE.
In 1923, the concrete diversion dam at Lake Harriet was completed.[2] This lake holds Script error: No such module "convert".[3] with a surface area of Script error: No such module "convert"..[4] A Script error: No such module "convert". pipeline goes downstream from Lake Harriet to the powerhouse.[3] Power generation from the Oak Grove fork began in August 1924.[5]
In 1953, Frog Lake was completed, adding Script error: No such module "convert". of storage with Script error: No such module "convert". of surface, which was later reduced to Script error: No such module "convert". on Script error: No such module "convert". in 1997.[2][3] Finally, in 1956,[2] the compacted-earth dam for Timothy Lake was completed, creating the largest lake in the system at Script error: No such module "convert". and Script error: No such module "convert"..[3] The Oak Grove Powerhouse contains two Francis turbines.[3]
References
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- ↑ PGE power plant capacity
- ↑ a b c d e FWS: Eagle Creek: Appendix B: history
- ↑ a b c d e FERC EIS P-2195
- ↑ Photo tour: Harriet Dam
- ↑ Electrifying Eden: Craig Wollner, p 111
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External links
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- USGS flow data at Oak Grove powerplant intake
- DEQ survey
- PGE: parks on the Clackamas River
- BPA: Oak Grove Habitat Improvement Project, 1988
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