Green Mt. Lake is an earth dam located in Madison County, Alabama, built in 1974. It carries a Significant hazard potential classification.
Dam profile
NID height · 21 ft21 ft tall and 600 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Green Mt. Lake
The primary purpose of Green Mt. Lake is fish and wildlife pond. The dam creates habitat for fish and wildlife, supporting local ecosystems and potentially serving conservation goals. The dam is owned by Madison County (local government). It impounds the Tr-tennessee River near N/a.
The dam stands 21 feet tall and stretches 600 feet across, has a maximum storage capacity of 186 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1974, 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.
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Location
| State | Alabama |
| County | Madison |
| Nearest City | N/a |
| River/Stream | Tr-tennessee River |
| Coordinates | 34.60833, -86.52500 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 21 ft |
| Dam Height | 21 ft |
| Dam Length | 600 ft |
| Year Completed | 1974 (52 years old) |
Storage & Hydraulics
| NID Storage | 186 acre-ft |
| Max Storage | 186 acre-ft |
| Normal Storage | 120 acre-ft |
| Drainage Area | 0 sq mi |
| Max Discharge | 683 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fish and Wildlife Pond |
| Owner | Madison County |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | AL02216 |
| Federal ID | AL02216 |
| More Info | ASDSO on Alabama (no state dam safety program) |