Long Pine Run
Long Pine Run is an earth dam located in Adams County, Pennsylvania, built in 1970. It carries a High hazard potential classification and has a fair condition assessment.
About Long Pine Run
The primary purpose of Long Pine Run is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Borough Of Chambersburg (local government). It impounds the Birch Run.
The dam stands 112 feet tall and stretches 840 feet across, creates a reservoir covering 150 acres, has a maximum storage capacity of 7,490 acre-feet, and collects water from a drainage area of 7 square miles. Completed in 1970, the structure is well into its service life at over 50 years old.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 03/22/2021.
At 112 feet, this dam is taller than 98% of all dams in the United States.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Pennsylvania dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Pennsylvania |
| County | Adams |
| River/Stream | Birch Run |
| Coordinates | 39.93750, -77.44528 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 112 ft |
| Dam Height | 112 ft |
| Dam Length | 840 ft |
| Year Completed | 1970 (56 years old) |
Storage & Hydraulics
| NID Storage | 7,490 acre-ft |
| Max Storage | 7,490 acre-ft |
| Normal Storage | 5,430 acre-ft |
| Surface Area | 150 acres |
| Drainage Area | 7 sq mi |
Ownership & Safety
| Purpose | Water Supply |
| Owner | BOROUGH OF CHAMBERSBURG |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Fair |
| Last Inspection | 03/22/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | PA00328 |
| Federal ID | PA00328 |
| More Info | State Dam Safety Program |