Mast

About Mast

The primary purpose of Mast 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 Stacy Holland (private). It impounds the Tr Cahto Creek.

The dam stands 85 feet tall and stretches 580 feet across, creates a reservoir covering 14 acres, has a maximum storage capacity of 380 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1963, 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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 05/08/2025.

At 85 feet, this dam is taller than 97% of all dams in the United States.

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