John C. Stennis Lock And Dam
John C. Stennis Lock And Dam is a gravity dam located in Lowndes County, Mississippi, built in 1980. It carries a Significant hazard potential classification.
About John C. Stennis Lock And Dam
The primary purpose of John C. Stennis Lock And Dam is navigation. The dam maintains water levels sufficient for boat and barge traffic, supporting commercial or recreational navigation on the waterway. The dam is owned by Usace - Mobile District (federal). It impounds the Tombigbee near Columbus.
The dam stands 82 feet tall and stretches 1,000 feet across, creates a reservoir covering 8,910 acres, has a maximum storage capacity of 59,483 acre-feet, and collects water from a drainage area of 4,440 square miles. Completed in 1980, the structure is 46 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. An emergency action plan is in place for this dam. The most recent inspection on record was 04/22/2022.
At 82 feet, this dam is taller than 97% of all dams in the United States.
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Location
| State | Mississippi |
| County | Lowndes |
| Nearest City | Columbus |
| River/Stream | Tombigbee |
| Coordinates | 33.51823, -88.48868 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 82 ft |
| Dam Length | 1,000 ft |
| Year Completed | 1980 (46 years old) |
Storage & Hydraulics
| NID Storage | 59,483 acre-ft |
| Max Storage | 59,483 acre-ft |
| Normal Storage | 59,483 acre-ft |
| Surface Area | 8,910 acres |
| Drainage Area | 4,440 sq mi |
| Max Discharge | 628,200 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Navigation |
| Owner | USACE - Mobile District |
| Owner Type | Federal |
| Hazard Classification | Significant |
| Condition Assessment | Not Available |
| Last Inspection | 04/22/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MS03056 |
| Federal ID | MS03056 |
| More Info | State Dam Safety Program |