78 Ac Mcgill Dam

About 78 Ac Mcgill Dam

The primary purpose of 78 Ac Mcgill Dam is tailings. Tailings dams contain waste material from mining operations — typically a slurry of finely ground rock left over after valuable minerals have been extracted. These structures require ongoing monitoring because tailings can contain heavy metals and other contaminants. The dam is owned by Kennecott Corporation (private). It impounds the Steptoe Creek-os near Warm Springs.

The dam stands 27 feet tall and stretches 100 feet across, creates a reservoir covering 78 acres, has a maximum storage capacity of 300 acre-feet, and collects water from a drainage area of 0 square miles.

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 05/01/2019.

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