Upper
Upper is a concrete dam located in Penobscot County, Maine, built in 1900. It carries a Low hazard potential classification and has a poor condition assessment.
About Upper
The primary purpose of Upper 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 Corinna (local government). It impounds the East Branch Sebasticook.
The dam stands 10 feet tall and stretches 160 feet across, creates a reservoir covering 233 acres, has a maximum storage capacity of 1,600 acre-feet, and collects water from a drainage area of 30 square miles. Completed in 1900, 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 08/21/2019.
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Location
| State | Maine |
| County | Penobscot |
| River/Stream | East Branch Sebasticook |
| Coordinates | 44.92386, -69.26258 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 10 ft |
| Dam Height | 10 ft |
| Dam Length | 160 ft |
| Year Completed | 1900 (126 years old) |
Storage & Hydraulics
| NID Storage | 1,600 acre-ft |
| Max Storage | 1,600 acre-ft |
| Normal Storage | 736 acre-ft |
| Surface Area | 233 acres |
| Drainage Area | 30 sq mi |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Corinna |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 08/21/2019 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | ME00332 |
| Federal ID | ME00332 |
| More Info | State Dam Safety Program |