Oak Grove Fork Clackamas River - Hydroelectric Dams

Hydroelectric Dams

As part of its efforts to generate electricity from water power in the Clackamas River basin, PGE built a dam on the Oak Grove Fork in 1923. The company's power plant at Lake Harriet, created by the dam, began making electricity in 1924. To regulate flows on the Oak Grove Fork and on the mainstem Clackamas River, the company built a dam at Timothy Meadows, upstream of Harriet Lake, in 1956. The new dam formed Timothy Lake, a 1,440-acre (580 ha) impoundment that doubles as a recreation site.