Cavendish is a concrete dam located in Windsor County, Vermont, built in 1907. It carries a Low hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 25 ft25 ft tall and 147 ft long, taller than 50% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic concrete gravity section and the water level is illustrative.
About Cavendish
The primary purpose of Cavendish 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 Green Mountain Power Corporation (public utility). It impounds the Black River near Whitesville.
The dam stands 25 feet tall and stretches 147 feet across, creates a reservoir covering 10 acres, has a maximum storage capacity of 23 acre-feet, and collects water from a drainage area of 83 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 09/12/2022.
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Location
| State | Vermont |
| County | Windsor |
| Nearest City | Whitesville |
| River/Stream | Black River |
| Coordinates | 43.38110, -72.59830 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 147 ft |
| Year Completed | 1907 (119 years old) |
Storage & Hydraulics
| NID Storage | 23 acre-ft |
| Max Storage | 23 acre-ft |
| Normal Storage | 23 acre-ft |
| Surface Area | 10 acres |
| Drainage Area | 83 sq mi |
| Max Discharge | 18,400 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Green Mountain Power Corporation |
| Owner Type | Public Utility |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 09/12/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | VT00037 |
| Federal ID | VT00037 |
| More Info | State Dam Safety Program |