Frog Lake Dam A

About Frog Lake Dam A

The primary purpose of Frog Lake Dam A is hydroelectric. The dam generates hydroelectric power by channeling water through turbines, converting the energy of flowing water into electricity. The dam is owned by Portland General Electric Company (private). It impounds the Clackamas River near Estacada, Or.

The dam stands 50 feet tall and stretches 220 feet across, creates a reservoir covering 17 acres, has a maximum storage capacity of 530 acre-feet, and collects water from a drainage area of 131 square miles. Completed in 1955, the structure is well into its service life at over 50 years old.

This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 09/20/2022.

At 50 feet, this dam is taller than 93% of dams nationwide.

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