Keystone State Park is an earth dam located in Westmoreland County, Pennsylvania, built in 1910. It carries a Significant hazard potential classification.
Dam profile
NID height · 45 ft45 ft tall and 680 ft long, taller than 90% 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 Keystone State Park
The primary purpose of Keystone State Park is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Dcnr (state). It impounds the Mccune Run.
The dam stands 45 feet tall and stretches 680 feet across, creates a reservoir covering 78 acres, has a maximum storage capacity of 1,250 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 1910, the structure is over a century 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 03/11/2019.
At 45 feet, this dam is taller than 90% of dams nationwide.
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Location
| State | Pennsylvania |
| County | Westmoreland |
| River/Stream | Mccune Run |
| Coordinates | 40.37444, -79.39083 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 45 ft |
| Dam Height | 45 ft |
| Dam Length | 680 ft |
| Year Completed | 1910 (116 years old) |
Storage & Hydraulics
| NID Storage | 1,250 acre-ft |
| Max Storage | 1,250 acre-ft |
| Normal Storage | 680 acre-ft |
| Surface Area | 78 acres |
| Drainage Area | 3 sq mi |
Ownership & Safety
| Purpose | Recreation |
| Owner | Dcnr |
| Owner Type | State |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 03/11/2019 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | PA00480 |
| Federal ID | PA00480 |
| More Info | State Dam Safety Program |