Potacocawa Watershed Structure Y-31a-12 Dam is an earth dam located in Carroll County, Mississippi, built in 1966. It carries a Low hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 34 ft34 ft tall and 1,340 ft long, taller than 78% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Potacocawa Watershed Structure Y-31a-12 Dam
The primary purpose of Potacocawa Watershed Structure Y-31a-12 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 Jack Lishman (local government).
The dam stands 34 feet tall and stretches 1,340 feet across, creates a reservoir covering 40 acres, has a maximum storage capacity of 1,204 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 1966, the structure is well into its service life at over 50 years old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. Its condition is rated poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 12/11/2019.
At 34 feet, this dam is taller than 78% of dams nationwide.
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Location
| State | Mississippi |
| County | Carroll |
| Coordinates | 33.61573, -89.86343 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 34 ft |
| Dam Height | 34 ft |
| Dam Length | 1,340 ft |
| Year Completed | 1966 (60 years old) |
Storage & Hydraulics
| NID Storage | 1,204 acre-ft |
| Max Storage | 1,204 acre-ft |
| Surface Area | 40 acres |
| Drainage Area | 3 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Jack Lishman |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 12/11/2019 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MS01080 |
| Federal ID | MS01080 |
| More Info | State Dam Safety Program |