Thompson No 1 Main Dam

About Thompson No 1 Main Dam

The primary purpose of Thompson No 1 Main Dam 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 Springs Little Canyon Creek near Little Canyon Rd.

The dam stands 17 feet tall and stretches 580 feet across, creates a reservoir covering 6 acres, has a storage capacity of 54 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1967, 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. The most recent inspection on record was 07/19/2017.

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