Gilman Falls
Gilman Falls is a concrete dam located in Penobscot County, Maine, built in 1906. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Gilman Falls
The primary purpose of Gilman Falls 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 Black Bear Hydro Partners, Llc (private). It impounds the Stillwater River near Old Town.
The dam stands 8 feet tall and stretches 461 feet across, creates a reservoir covering 235 acres, has a maximum storage capacity of 2,250 acre-feet, and collects water from a drainage area of 7,600 square miles. Completed in 1906, 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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 09/13/2022.
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Location
| State | Maine |
| County | Penobscot |
| Nearest City | Old Town |
| River/Stream | Stillwater River |
| Coordinates | 44.95143, -68.69516 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 8 ft |
| Dam Height | 8 ft |
| Dam Length | 461.5 ft |
| Year Completed | 1906 (120 years old) |
Storage & Hydraulics
| NID Storage | 2,250 acre-ft |
| Max Storage | 2,250 acre-ft |
| Normal Storage | 2,250 acre-ft |
| Surface Area | 235 acres |
| Drainage Area | 7,600 sq mi |
| Max Discharge | 35,132 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Black Bear Hydro Partners, LLC |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 09/13/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | ME83006 |
| Federal ID | ME00141S001 |
| More Info | State Dam Safety Program |