John H. Overton Lock And Dam
Significant HazardNot Available ConditionEmergency Action Plan: Yes
Location
| State | Louisiana |
| County | Rapides |
| Nearest City | SIMMESPORT |
| River/Stream | RED RIVER |
| Coordinates | 31.18703, -92.29283 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 104 ft |
| Dam Length | 914 ft |
| Year Completed | 1987 (39 years old) |
Storage & Hydraulics
| NID Storage | 67,500 acre-ft |
| Max Storage | 67,500 acre-ft |
| Normal Storage | 67,500 acre-ft |
| Surface Area | 3,750 acres |
| Drainage Area | 67,458 sq mi |
| Max Discharge | 255,000 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Navigation |
| Owner | USACE - Vicksburg District |
| Owner Type | Federal |
| Hazard Classification | Significant |
| Condition Assessment | Not Available |
| Last Inspection | 07/15/2025 |
| Emergency Action Plan | Yes |