G.v. "sonny" Montgomery Lock and Dam is a gravity dam located in Itawamba County, Mississippi, built in 1984. It carries a Significant hazard potential classification.
Dam profile
NID height · 54 ft54 ft tall and 5,400 ft long, taller than 94% of U.S. dams with a recorded height. Height is drawn to scale against a ten-story building, about 100 ft; the profile is a generic concrete gravity section and the water level is illustrative.
About G.v. "sonny" Montgomery Lock and Dam
The primary purpose of G.v. "sonny" Montgomery 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 Fulton.
The dam stands 54 feet tall and stretches 5,400 feet across, creates a reservoir covering 851 acres, has a maximum storage capacity of 7,700 acre-feet, and collects water from a drainage area of 139 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. An emergency action plan is in place for this dam. The most recent inspection on record was 04/21/2022.
At 54 feet, this dam is taller than 94% of dams nationwide.
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Location
| State | Mississippi |
| County | Itawamba |
| Nearest City | Fulton |
| River/Stream | Tombigbee |
| Coordinates | 34.46281, -88.36625 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 54 ft |
| Dam Length | 5,400 ft |
| Year Completed | 1984 (42 years old) |
Storage & Hydraulics
| NID Storage | 7,700 acre-ft |
| Max Storage | 7,700 acre-ft |
| Normal Storage | 6,900 acre-ft |
| Surface Area | 851 acres |
| Drainage Area | 139 sq mi |
| Max Discharge | 49,900 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Navigation |
| Owner | USACE - Mobile District |
| Owner Type | Federal |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 04/21/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MS03604 |
| Federal ID | MS03604 |
| More Info | State Dam Safety Program |