Union Gas
Union Gas is a masonry dam located in Kennebec County, Maine, built in 1924. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Union Gas
The primary purpose of Union Gas 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 Messalonskee Stream Hydro, Llc (private). It impounds the Messalonskee Stream near Sidney.
The dam stands 28 feet tall and stretches 343 feet across, creates a reservoir covering 25 acres, has a maximum storage capacity of 600 acre-feet, and collects water from a drainage area of 207 square miles. Completed in 1924, 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 08/31/2022.
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Location
| State | Maine |
| County | Kennebec |
| Nearest City | Sidney |
| River/Stream | Messalonskee Stream |
| Coordinates | 44.53440, -69.65230 |
Physical Characteristics
| Dam Type | Masonry |
| NID Height | 28 ft |
| Dam Height | 28 ft |
| Dam Length | 343 ft |
| Year Completed | 1924 (102 years old) |
Storage & Hydraulics
| NID Storage | 600 acre-ft |
| Max Storage | 600 acre-ft |
| Normal Storage | 600 acre-ft |
| Surface Area | 25 acres |
| Drainage Area | 207 sq mi |
| Max Discharge | 2,460 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Messalonskee Stream Hydro, LLC |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 08/31/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | ME00102 |
| Federal ID | ME00102 |
| More Info | State Dam Safety Program |