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.
Dam profile
NID height · 35 ft35 ft tall, taller than 80% 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 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 80% 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 |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MS00025 |
| Federal ID | MS00025 |
| More Info | State Dam Safety Program |