Mosaic Csa F2d

About Mosaic Csa F2d

The primary purpose of Mosaic Csa F2d 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 The Mosaic Company (private). It impounds the Alderman Creek near Fort Lonesome.

The dam stands 57 feet tall and stretches 14,648 feet across, creates a reservoir covering 550 acres, has a maximum storage capacity of 29,100 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1996, the structure is 30 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. An emergency action plan is in place for this dam. The most recent inspection on record was 10/01/2010. That was over 15 years ago.

At 57 feet, this dam is taller than 95% of all dams in the United States.

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