Alligator Lake is an earth dam located in Vernon Parish, Louisiana, built in 1955. It carries a Low hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 34 ft34 ft tall and 1,000 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 Alligator Lake
The primary purpose of Alligator Lake is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Fort Johnson (federal). It impounds the Liberty Creek near Leesville Louisiana.
The dam stands 34 feet tall and stretches 1,000 feet across, creates a reservoir covering 14 acres, has a maximum storage capacity of 140 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1955, 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. An emergency action plan is in place for this dam. The most recent inspection on record was 04/28/2019.
At 34 feet, this dam is taller than 78% of dams nationwide.
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Location
| State | Louisiana |
| County | Vernon |
| Nearest City | Leesville Louisiana |
| River/Stream | Liberty Creek |
| Coordinates | 31.14463, -93.15329 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 34 ft |
| Dam Height | 34 ft |
| Dam Length | 1,000 ft |
| Year Completed | 1955 (71 years old) |
Storage & Hydraulics
| NID Storage | 140 acre-ft |
| Max Storage | 140 acre-ft |
| Normal Storage | 80 acre-ft |
| Surface Area | 14 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 270 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Fort Johnson |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 04/28/2019 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | LA00170 |
| Federal ID | LA00170 |
| More Info | State Dam Safety Program |