Folsom Pond is a concrete dam located in Penobscot County, Maine, built in 1918. It carries a Low hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 18 ft18 ft tall and 480 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic concrete gravity section and the water level is illustrative.
About Folsom Pond
The primary purpose of Folsom Pond is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is local government-owned. It impounds the Mattanawcook Stream near Lincoln.
The dam stands 18 feet tall and stretches 480 feet across, creates a reservoir covering 502 acres, has a maximum storage capacity of 3,345 acre-feet, and collects water from a drainage area of 12 square miles. Completed in 1918, the structure is over a century old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. Its condition is rated poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 11/14/2023.
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Location
| State | Maine |
| County | Penobscot |
| Nearest City | Lincoln |
| River/Stream | Mattanawcook Stream |
| Coordinates | 45.34970, -68.46616 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Dam Length | 480 ft |
| Year Completed | 1918 (108 years old) |
Storage & Hydraulics
| NID Storage | 3,345 acre-ft |
| Max Storage | 3,345 acre-ft |
| Normal Storage | 2,500 acre-ft |
| Surface Area | 502 acres |
| Drainage Area | 12 sq mi |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 11/14/2023 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | ME00174 |
| Federal ID | ME00174 |
| More Info | State Dam Safety Program |