Shady Valley Dam
Shady Valley Dam is an earth dam located in Grundy County, Tennessee, built in 1988. It carries a Significant hazard potential classification and has a fair condition assessment.
About Shady Valley Dam
Shady Valley Dam is a dam in Grundy, Tennessee. The dam is owned by Tdec (private). It impounds the Trib-big Creek.
The dam stands 39 feet tall and stretches 730 feet across, creates a reservoir covering 41 acres, has a maximum storage capacity of 720 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1988, the structure is 38 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. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 01/21/2026.
At 39 feet, this dam is taller than 86% of dams nationwide.
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Location
| State | Tennessee |
| County | Grundy |
| River/Stream | Trib-big Creek |
| Coordinates | 35.44806, -85.66444 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 39 ft |
| Dam Length | 730 ft |
| Year Completed | 1988 (38 years old) |
Storage & Hydraulics
| NID Storage | 720 acre-ft |
| Max Storage | 720 acre-ft |
| Normal Storage | 427 acre-ft |
| Surface Area | 41 acres |
| Drainage Area | 1 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Owner | TDEC |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 01/21/2026 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | TN06113 |
| Federal ID | TN06113 |
| More Info | State Dam Safety Program |