Unionville
Unionville is a concrete dam located in St. Lawrence County, New York, built in 1907. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Unionville
The primary purpose of Unionville 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 Erie Boulevard Hydropower, L.p. (private). It impounds the Raquette River near Norwood.
The dam stands 20 feet tall and stretches 350 feet across, creates a reservoir covering 35 acres, has a maximum storage capacity of 99 acre-feet, and collects water from a drainage area of 1,036 square miles. Completed in 1907, 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 07/15/2019.
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Location
| State | New York |
| County | St. Lawrence |
| Nearest City | Norwood |
| River/Stream | Raquette River |
| Coordinates | 44.71480, -74.99750 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 350 ft |
| Year Completed | 1907 (119 years old) |
Storage & Hydraulics
| NID Storage | 99 acre-ft |
| Max Storage | 99 acre-ft |
| Normal Storage | 99 acre-ft |
| Surface Area | 35 acres |
| Drainage Area | 1,036 sq mi |
| Max Discharge | 11,500 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Erie Boulevard Hydropower, L.P. |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 07/15/2019 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NY00701 |
| Federal ID | NY00701 |
| More Info | State Dam Safety Program |