Hole-n-wall Detention Dam

About Hole-n-wall Detention Dam

The primary purpose of Hole-n-wall Detention Dam is debris control. The dam is designed to catch sediment, rocks, and debris carried by flowing water — particularly important in areas prone to mudslides or heavy erosion. The dam is owned by Doi Blm (federal). It impounds the Hurricane Wash Tributary near Saint George, Utah.

The dam stands 32 feet tall and stretches 950 feet across, creates a reservoir covering 178 acres, has a maximum storage capacity of 1,150 acre-feet, and collects water from a drainage area of 76 square miles. Completed in 1960, the structure is well into its service life at over 50 years 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 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 06/25/2008. That was over 17 years ago.

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

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