Keaiwa Reservoir

About Keaiwa Reservoir

The primary purpose of Keaiwa Reservoir is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Edmund C. Olson Trust No. Ii (private). It impounds the Fed By Irr. Flume near Middle & Lower Moaula Camp.

The dam stands 32 feet tall and stretches 600 feet across, creates a reservoir covering 1 acres, and has a maximum storage capacity of 48 acre-feet. Completed in 1920, the structure is over a century old.

This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. Its condition is rated unsatisfactory, indicating serious safety deficiencies exist that require immediate attention or remedial action. An emergency action plan is in place for this dam. The most recent inspection on record was 02/22/2024.

At 32 feet, this dam is taller than 76% of dams nationwide.

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