Casket Mill is a concrete dam located in Knox County, Maine, built in 1920. It carries a Low hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 25 ft25 ft tall and 62 ft long, taller than 50% of U.S. dams with a recorded height. 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 Casket Mill
The primary purpose of Casket Mill 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 Thurston Brothers, Inc. (private). It impounds the Mill Stream.
The dam stands 25 feet tall and stretches 62 feet across, creates a reservoir covering 1 acres, and has a maximum storage capacity of 16 acre-feet. Completed in 1920, 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.
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Location
| State | Maine |
| County | Knox |
| River/Stream | Mill Stream |
| Coordinates | 44.19773, -69.26352 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 62 ft |
| Year Completed | 1920 (106 years old) |
Storage & Hydraulics
| NID Storage | 16 acre-ft |
| Max Storage | 16 acre-ft |
| Normal Storage | 15 acre-ft |
| Surface Area | 1 acres |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Thurston Brothers, Inc. |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | ME00253 |
| Federal ID | ME00253 |
| More Info | State Dam Safety Program |