Leach Dam

About Leach Dam

The primary purpose of Leach Dam is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Stephen W & Melissa A Johndreau (private). It impounds the Tr-niobrara River near Niobrara.

The dam stands 39 feet tall and stretches 385 feet across, creates a reservoir covering 4 acres, has a maximum storage capacity of 41 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1950, 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. The most recent inspection on record was 05/10/2023.

At 39 feet, this dam is taller than 86% of dams nationwide.

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