Bayou Dupont No 9
Bayou Dupont No 9 is an earth dam located in Natchitoches Parish, Louisiana, built in 1959. It carries a Significant hazard potential classification and has a fair condition assessment.
About Bayou Dupont No 9
The primary purpose of Bayou Dupont No 9 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 Henry Sowell (private). It impounds the Tr-bayou Dupont near Shamrock.
The dam stands 28 feet tall and stretches 1,440 feet across, creates a reservoir covering 36 acres, has a maximum storage capacity of 658 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1959, 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 08/15/2023.
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Location
| State | Louisiana |
| County | Natchitoches |
| Nearest City | Shamrock |
| River/Stream | Tr-bayou Dupont |
| Coordinates | 31.71400, -93.33400 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 28 ft |
| Dam Height | 22 ft |
| Dam Length | 1,440 ft |
| Year Completed | 1959 (67 years old) |
Storage & Hydraulics
| NID Storage | 658 acre-ft |
| Max Storage | 658 acre-ft |
| Normal Storage | 215 acre-ft |
| Surface Area | 36 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 6,400 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Henry Sowell |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 08/15/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | LA00062 |
| Federal ID | LA00062 |
| More Info | State Dam Safety Program |