Stillwater Lake
Stillwater Lake is a roller-compacted concrete dam located in Monroe County, Pennsylvania, built in 1900. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Stillwater Lake
The primary purpose of Stillwater Lake is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Bsa Minsi Trail Council (private). It impounds the Upper Tunkhannock Creek.
The dam stands 8 feet tall and stretches 500 feet across, creates a reservoir covering 300 acres, has a maximum storage capacity of 3,000 acre-feet, and collects water from a drainage area of 13 square miles. Completed in 1900, the structure is over a century 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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 07/15/2020.
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 | Upper Tunkhannock Creek |
| Coordinates | 41.11750, -75.42417 |
Physical Characteristics
| Dam Type | Roller-Compacted Concrete |
| NID Height | 8 ft |
| Dam Height | 8 ft |
| Dam Length | 500 ft |
| Year Completed | 1900 (126 years old) |
Storage & Hydraulics
| NID Storage | 3,000 acre-ft |
| Max Storage | 3,000 acre-ft |
| Normal Storage | 1,335 acre-ft |
| Surface Area | 300 acres |
| Drainage Area | 13 sq mi |
Ownership & Safety
| Purpose | Recreation |
| Owner | BSA MINSI TRAIL COUNCIL |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 07/15/2020 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | PA00772 |
| Federal ID | PA00772 |
| More Info | State Dam Safety Program |