Cumberland Fossil Plant - Ash Pond (complex) is an earth dam located in Stewart County, Tennessee, built in 1969. It carries a Significant hazard potential classification.
Dam profile
NID height · 49 ft49 ft tall and 16,887 ft long, taller than 92% 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 embankment section and the water level is illustrative.
About Cumberland Fossil Plant - Ash Pond (complex)
Cumberland Fossil Plant - Ash Pond (complex) is a dam in Stewart, Tennessee. The dam is owned by TVA (federal). It impounds the Cumberland River - Offstream near Cumberland City.
The dam stands 49 feet tall and stretches 16,887 feet across, creates a reservoir covering 28 acres, has a maximum storage capacity of 1,130 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1969, 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 05/27/2025.
At 49 feet, this dam is taller than 92% of dams nationwide.
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Location
| State | Tennessee |
| County | Stewart |
| Nearest City | Cumberland City |
| River/Stream | Cumberland River - Offstream |
| Coordinates | 36.39600, -87.66400 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 49 ft |
| Dam Height | 49 ft |
| Dam Length | 16,887 ft |
| Year Completed | 1969 (57 years old) |
Storage & Hydraulics
| NID Storage | 1,130 acre-ft |
| Max Storage | 1,130 acre-ft |
| Normal Storage | 420 acre-ft |
| Surface Area | 28 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 780 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner | TVA |
| Owner Type | Federal |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 05/27/2025 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | TN16109 |
| Federal ID | TN16109 |
| More Info | State Dam Safety Program |