Cochnewagon is a concrete dam located in Kennebec County, Maine, built in 1900. It carries a Significant hazard potential classification and has a unsatisfactory condition assessment.
Dam profile
NID height · 9 ft9 ft tall and 40 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 Cochnewagon
The primary purpose of Cochnewagon is hydroelectric. The dam generates hydroelectric power by channeling water through turbines, converting the energy of flowing water into electricity. The dam is owned by Monmouth (local government). It impounds the MUD Mills Stream.
The dam stands 9 feet tall and stretches 40 feet across, creates a reservoir covering 403 acres, has a maximum storage capacity of 1,590 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 1900, the structure is over a century old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated unsatisfactory, indicating serious safety deficiencies exist that require immediate attention or remedial action. An emergency action plan is in place for this dam. The most recent inspection on record was 04/15/2022.
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Location
| State | Maine |
| County | Kennebec |
| River/Stream | MUD Mills Stream |
| Coordinates | 44.23972, -70.03770 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 9 ft |
| Dam Height | 9 ft |
| Dam Length | 40 ft |
| Year Completed | 1900 (126 years old) |
Storage & Hydraulics
| NID Storage | 1,590 acre-ft |
| Max Storage | 1,590 acre-ft |
| Normal Storage | 1,060 acre-ft |
| Surface Area | 403 acres |
| Drainage Area | 3 sq mi |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Monmouth |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Unsatisfactory |
| Last Inspection | 04/15/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | ME00314 |
| Federal ID | ME00314 |
| More Info | State Dam Safety Program |