Mount Airy
Mount Airy is an earth dam located in Monroe County, Pennsylvania, built in 1974. It carries a High hazard potential classification and has a poor condition assessment.
About Mount Airy
The primary purpose of Mount Airy is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Mt. Airy Casino Resort (private). It impounds the Forest Hills Run.
The dam stands 42 feet tall and stretches 700 feet across, creates a reservoir covering 16 acres, has a maximum storage capacity of 284 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1974, 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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. An emergency action plan is in place for this dam. The most recent inspection on record was 01/06/2021.
At 42 feet, this dam is taller than 89% of dams nationwide.
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 | Monroe |
| River/Stream | Forest Hills Run |
| Coordinates | 41.11250, -75.31778 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 42 ft |
| Dam Height | 42 ft |
| Dam Length | 700 ft |
| Year Completed | 1974 (52 years old) |
Storage & Hydraulics
| NID Storage | 284 acre-ft |
| Max Storage | 284 acre-ft |
| Normal Storage | 187 acre-ft |
| Surface Area | 16 acres |
| Drainage Area | 2 sq mi |
Ownership & Safety
| Purpose | Recreation |
| Owner | MT. AIRY CASINO RESORT |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Poor |
| Last Inspection | 01/06/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | PA00811 |
| Federal ID | PA00811 |
| More Info | State Dam Safety Program |