Gallatin Fossil Plant - Active Ash Pond a is an earth dam located in Sumner County, Tennessee, built in 1970. It carries a Significant hazard potential classification.
Dam profile
NID height · 17 ft17 ft tall and 5,008 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 Gallatin Fossil Plant - Active Ash Pond a
Gallatin Fossil Plant - Active Ash Pond a is a dam in Sumner, Tennessee. The dam is owned by TVA (federal). It impounds the Cumberland River - Offstream near Gallatin.
The dam stands 17 feet tall and stretches 5,008 feet across, creates a reservoir covering 278 acres, has a maximum storage capacity of 1,400 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1970, 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. An emergency action plan is in place for this dam. The most recent inspection on record was 06/03/2025.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Tennessee |
| County | Sumner |
| Nearest City | Gallatin |
| River/Stream | Cumberland River - Offstream |
| Coordinates | 36.33800, -86.40100 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 17 ft |
| Dam Height | 16 ft |
| Dam Length | 5,008 ft |
| Year Completed | 1970 (56 years old) |
Storage & Hydraulics
| NID Storage | 1,400 acre-ft |
| Max Storage | 1,400 acre-ft |
| Normal Storage | 209 acre-ft |
| Surface Area | 278 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 326 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner | TVA |
| Owner Type | Federal |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 06/03/2025 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | TN16525 |
| Federal ID | TN16525 |
| More Info | State Dam Safety Program |