Holmes Mill
Holmes Mill is a masonry dam located in Waldo County, Maine, built in 1870. It carries a Low hazard potential classification.
About Holmes Mill
The primary purpose of Holmes 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 D.r. Heald Corp. - Sold It Two Years Ago (private). It impounds the Passagassawak River.
The dam stands 15 feet tall and stretches 125 feet across, creates a reservoir covering 14 acres, and has a maximum storage capacity of 60 acre-feet. Completed in 1870, the structure is one of the older dams in the region, with over a century and a half of service.
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.
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Location
| State | Maine |
| County | Waldo |
| River/Stream | Passagassawak River |
| Coordinates | 44.44465, -69.06304 |
Physical Characteristics
| Dam Type | Masonry |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 125 ft |
| Year Completed | 1870 (156 years old) |
Storage & Hydraulics
| NID Storage | 60 acre-ft |
| Max Storage | 60 acre-ft |
| Normal Storage | 45 acre-ft |
| Surface Area | 14 acres |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | D.R. Heald Corp. - Sold it two years ago |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | ME00245 |
| Federal ID | ME00245 |
| More Info | State Dam Safety Program |