Bayou Dupont No 7 is an earth dam located in Sabine Parish, Louisiana, built in 1961. It carries a Significant hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 36 ft36 ft tall and 1,708 ft long, taller than 82% 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 Bayou Dupont No 7
The primary purpose of Bayou Dupont No 7 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 L&m Land & Cattle, LLC (private). It impounds the Bayou Adois near Shamrock.
The dam stands 36 feet tall and stretches 1,708 feet across, creates a reservoir covering 23 acres, has a maximum storage capacity of 504 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1961, the structure is well into its service life at over 50 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 10/23/2023.
At 36 feet, this dam is taller than 82% of dams nationwide.
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Location
| State | Louisiana |
| County | Sabine |
| Nearest City | Shamrock |
| River/Stream | Bayou Adois |
| Coordinates | 31.68800, -93.37400 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 36 ft |
| Dam Height | 32 ft |
| Dam Length | 1,708 ft |
| Year Completed | 1961 (65 years old) |
Storage & Hydraulics
| NID Storage | 504 acre-ft |
| Max Storage | 504 acre-ft |
| Normal Storage | 84 acre-ft |
| Surface Area | 23 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 1,345 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | L&m Land & Cattle, LLC |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 10/23/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | LA00014 |
| Federal ID | LA00014 |
| More Info | State Dam Safety Program |