Thorn Hill Park Detention Basin

About Thorn Hill Park Detention Basin

The primary purpose of Thorn Hill Park Detention Basin 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 Marshall Township (local government). It impounds the Tr Brush Creek.

The dam stands 18 feet tall and stretches 1,125 feet across, has a maximum storage capacity of 28 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1987, the structure is 39 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 fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 09/08/2017.

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