Thorn Run
Thorn Run is an earth dam located in Westmoreland County, Pennsylvania, built in 1981. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Thorn Run
The primary purpose of Thorn Run is grade stabilization. Grade stabilization dams prevent erosion by reducing the slope and velocity of water flowing through a channel. They're commonly used to stop gullies from deepening and to protect downstream land and infrastructure. The dam is owned by Westmoreland County Commissioners (local government). It impounds the Thorn Run.
The dam stands 22 feet tall and stretches 360 feet across, creates a reservoir covering 6 acres, has a maximum storage capacity of 75 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1981, the structure is 45 years old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected 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 08/25/2015. That was over 10 years ago.
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Location
| State | Pennsylvania |
| County | Westmoreland |
| River/Stream | Thorn Run |
| Coordinates | 40.44917, -79.57722 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 22 ft |
| Dam Height | 22 ft |
| Dam Length | 360 ft |
| Year Completed | 1981 (45 years old) |
Storage & Hydraulics
| NID Storage | 75 acre-ft |
| Max Storage | 75 acre-ft |
| Normal Storage | 41 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 1 sq mi |
Ownership & Safety
| Purpose | Grade Stabilization |
| Owner | WESTMORELAND COUNTY COMMISSIONERS |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 08/25/2015 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | PA01598 |
| Federal ID | PA01598 |
| More Info | State Dam Safety Program |