Twin Springs Dam is an earth dam located in McNairy County, Tennessee, built in 1977. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 33 ft33 ft tall and 540 ft long, taller than 76% of U.S. dams with a recorded height. 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 Twin Springs Dam
Twin Springs Dam is a dam in McNairy, Tennessee. The dam is owned by Smith, Robert W. (private). It impounds the Joplin Branch near Selmer.
The dam stands 33 feet tall and stretches 540 feet across, creates a reservoir covering 19 acres, has a maximum storage capacity of 272 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1977, the structure is 49 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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 06/03/2025.
At 33 feet, this dam is taller than 76% of dams nationwide.
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Location
| State | Tennessee |
| County | McNairy |
| Nearest City | Selmer |
| River/Stream | Joplin Branch |
| Coordinates | 35.17889, -88.53750 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 33 ft |
| Dam Length | 540 ft |
| Year Completed | 1977 (49 years old) |
Storage & Hydraulics
| NID Storage | 272 acre-ft |
| Max Storage | 272 acre-ft |
| Normal Storage | 170 acre-ft |
| Surface Area | 19 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Owner | Smith, Robert W. |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 06/03/2025 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | TN10905 |
| Federal ID | TN10905 |
| More Info | State Dam Safety Program |