Mattanawcook Pond
Mattanawcook 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.
About Mattanawcook Pond
The primary purpose of Mattanawcook 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 owned by Lincoln (local government). It impounds the Mattanawcook Stream.
The dam stands 19 feet tall and stretches 140 feet across, creates a reservoir covering 832 acres, has a maximum storage capacity of 2,363 acre-feet, and collects water from a drainage area of 31 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 |
| River/Stream | Mattanawcook Stream |
| Coordinates | 45.36147, -68.50433 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 19 ft |
| Dam Height | 19 ft |
| Dam Length | 140 ft |
| Year Completed | 1918 (108 years old) |
Storage & Hydraulics
| NID Storage | 2,363 acre-ft |
| Max Storage | 2,363 acre-ft |
| Normal Storage | 1,772 acre-ft |
| Surface Area | 832 acres |
| Drainage Area | 31 sq mi |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Lincoln |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 11/14/2023 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | ME00173 |
| Federal ID | ME00173 |
| More Info | State Dam Safety Program |