Thorn Run
Key Takeaway
Thorn Run is classified as low hazard in Pennsylvania. It was completed in 1981 and is 45 years old. Its primary use is grade stabilization.
Physical Details
| Dam Height | 22 ft (taller than 48.9% in PA) |
| Dam Length | 360 ft |
| Dam Type | Earth |
| Max Storage | 75 acre-ft |
| Normal Storage | 41 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 2 sq mi |
| Year Completed | 1981 (45 years old) |
| NID ID | PA01598 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
WESTMORELAND COUNTY COMMISSIONERS
Local Government
Nearby Dams
Beaver Run
Westmoreland, PA
High Hazard 92 ftExton Lake
Westmoreland, PA
Significant Hazard 14 ftLake Ridge Estates Detention
Westmoreland, PA
Significant Hazard 17 ftBull Run
Westmoreland, PA
High Hazard 44 ftBerlin Road Detention Basin
Westmoreland, PA
High Hazard 11 ftWeaver Lake
Westmoreland, PA
High Hazard 25 ftLoyalhanna Dam
Westmoreland, PA
High HazardNorthmoreland Lake (Pa-117)
Westmoreland, PA
High Hazard 38 ftFrequently Asked Questions
What is the hazard classification of Thorn Run?
Thorn Run is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Thorn Run?
Thorn Run is owned by WESTMORELAND COUNTY COMMISSIONERS (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Thorn Run built?
Thorn Run was completed in 1981, making it 45 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.
What is the primary purpose of Thorn Run?
Thorn Run serves the following purposes: Grade Stabilization. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Thorn Run?
Thorn Run has a dam height of 22 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.
When was Thorn Run last inspected?
Thorn Run was last inspected on August 25, 2015. Inspection dates indicate when a formal review occurred, not the results of that inspection.