Hillsboro Reservoir No. 1 Dam

About Hillsboro Reservoir No. 1 Dam

The primary purpose of Hillsboro Reservoir No. 1 Dam is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by City Of Hillsboro (local government). It impounds the Tributary To Clear Creek near Mccoppin Mill.

The dam stands 42 feet tall and stretches 682 feet across, creates a reservoir covering 25 acres, has a maximum storage capacity of 387 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1945, the structure is well-established, with more than 75 years of service.

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 05/12/2023.

At 42 feet, this dam is taller than 89% of dams nationwide.

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