John Sevier Dam
John Sevier Dam is a concrete dam located in Hawkins County, Tennessee, built in 1955. It carries a Significant hazard potential classification.
About John Sevier Dam
The primary purpose of John Sevier Dam is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Tva (federal). It impounds the Holston River near Mccloud.
The dam stands 48 feet tall and stretches 1,110 feet across, creates a reservoir covering 660 acres, has a maximum storage capacity of 5,500 acre-feet, and collects water from a drainage area of 3,006 square miles. Completed in 1955, 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 09/18/2024.
At 48 feet, this dam is taller than 92% of dams nationwide.
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Location
| State | Tennessee |
| County | Hawkins |
| Nearest City | Mccloud |
| River/Stream | Holston River |
| Coordinates | 36.38125, -82.96584 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 48 ft |
| Dam Height | 20 ft |
| Dam Length | 1,110 ft |
| Year Completed | 1955 (71 years old) |
Storage & Hydraulics
| NID Storage | 5,500 acre-ft |
| Max Storage | 5,500 acre-ft |
| Normal Storage | 5,500 acre-ft |
| Surface Area | 660 acres |
| Drainage Area | 3,006 sq mi |
| Max Discharge | 395,090 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | TVA |
| Owner Type | Federal |
| Hazard Classification | Significant |
| Condition Assessment | Not Available |
| Last Inspection | 09/18/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | TN07305 |
| Federal ID | TN07305 |
| More Info | State Dam Safety Program |