Long Creek Watershed Y-11a-11 Dam
Long Creek Watershed Y-11a-11 Dam is an earth dam located in Attala County, Mississippi, built in 1970. It carries a Low hazard potential classification.
About Long Creek Watershed Y-11a-11 Dam
The primary purpose of Long Creek Watershed Y-11a-11 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 local government-owned.
The dam stands 35 feet tall, creates a reservoir covering 48 acres, has a maximum storage capacity of 862 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1970, 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.
At 35 feet, this dam is taller than 82% of dams nationwide.
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Location
| State | Mississippi |
| County | Attala |
| Coordinates | 33.01450, -89.63452 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 35 ft |
| Dam Height | 35 ft |
| Year Completed | 1970 (56 years old) |
Storage & Hydraulics
| NID Storage | 862 acre-ft |
| Max Storage | 862 acre-ft |
| Normal Storage | 174 acre-ft |
| Surface Area | 48 acres |
| Drainage Area | 2 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MS00025 |
| Federal ID | MS00025 |
| More Info | State Dam Safety Program |