Dayville Dike is an earth dam located in Windham County, Connecticut, built in 1925. It carries a Low hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 14 ft14 ft tall and 5,000 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Dayville Dike
The primary purpose of Dayville Dike 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 Summit Hydro, LLC (private). It impounds the Five Mile River near Dayville.
The dam stands 14 feet tall and stretches 5,000 feet across, creates a reservoir covering 31 acres, has a maximum storage capacity of 93 acre-feet, and collects water from a drainage area of 57 square miles. Completed in 1925, 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 07/10/2019.
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Location
| State | Connecticut |
| County | Windham |
| Nearest City | Dayville |
| River/Stream | Five Mile River |
| Coordinates | 41.85840, -71.88900 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 14 ft |
| Dam Height | 14 ft |
| Dam Length | 5,000 ft |
| Year Completed | 1925 (101 years old) |
Storage & Hydraulics
| NID Storage | 93 acre-ft |
| Max Storage | 93 acre-ft |
| Normal Storage | 93 acre-ft |
| Surface Area | 31 acres |
| Drainage Area | 57 sq mi |
| Spillway Type | None |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Summit Hydro, LLC |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 07/10/2019 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | CT00169 |
| Federal ID | CT00169 |
| More Info | State Dam Safety Program |