Little River W/s Str. #36

About Little River W/s Str. #36

The primary purpose of Little River W/s Str. #36 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 Fulton County Swcd (state). It impounds the Copper Sandy Creek near Alpharetta.

The dam stands 38 feet tall and stretches 860 feet across, creates a reservoir covering 20 acres, has a maximum storage capacity of 836 acre-feet, and collects water from a drainage area of 2,144 square miles. Completed in 1964, the structure is well into its service life at over 50 years old.

This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. Notably, no emergency action plan is currently on file for this high-hazard dam. The most recent inspection on record was 12/01/2009. That was 16 years ago — unusually long for a high-hazard dam, which typically requires more frequent inspections.

At 38 feet, this dam is taller than 85% of dams nationwide.

Living Downstream

If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Georgia dam safety program can provide more specific information about emergency planning for this structure.

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