Sunset Palisades

About Sunset Palisades

The primary purpose of Sunset Palisades is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is private-owned. It impounds the Unnamed Streams Snake River near Lewiston.

The dam stands 41 feet tall and stretches 275 feet across, creates a reservoir covering 2 acres, has a storage capacity of 41 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1973, 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 fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 10/16/2017.

At 41 feet, this dam is taller than 88% of dams nationwide.

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