Phyllis Murdock Dam
Phyllis Murdock Dam is an earth dam located in Sabine Parish, Louisiana, built in 1984. It carries a Significant hazard potential classification and has a poor condition assessment.
About Phyllis Murdock Dam
The primary purpose of Phyllis Murdock Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Phyllis Murdock (private). It impounds the Tr-bayou Scie near Zwolle.
The dam stands 6 feet tall and stretches 500 feet across, creates a reservoir covering 22 acres, has a maximum storage capacity of 134 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1984, the structure is 42 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 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 03/11/2025.
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Location
| State | Louisiana |
| County | Sabine |
| Nearest City | Zwolle |
| River/Stream | Tr-bayou Scie |
| Coordinates | 31.63366, -93.63941 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 6 ft |
| Dam Height | 6 ft |
| Dam Length | 500 ft |
| Year Completed | 1984 (42 years old) |
Storage & Hydraulics
| NID Storage | 134 acre-ft |
| Max Storage | 134 acre-ft |
| Normal Storage | 112 acre-ft |
| Surface Area | 22 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 766 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Phyllis Murdock |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 03/11/2025 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | LA00517 |
| Federal ID | LA00517 |
| More Info | State Dam Safety Program |