Clark Mills Upper is a concrete dam located in Washington County, New York, built in 1904. It carries a Low hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 23 ft23 ft tall and 469 ft long. 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 Clark Mills Upper
The primary purpose of Clark Mills Upper 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 Hollingsworth & Vose Company (private). It impounds the Battenkill River near Easton.
The dam stands 23 feet tall and stretches 469 feet across, creates a reservoir covering 89 acres, has a maximum storage capacity of 875 acre-feet, and collects water from a drainage area of 440 square miles. Completed in 1904, 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 07/20/2022.
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Location
| State | New York |
| County | Washington |
| Nearest City | Easton |
| River/Stream | Battenkill River |
| Coordinates | 43.11850, -73.55500 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 23 ft |
| Dam Height | 23 ft |
| Dam Length | 469 ft |
| Year Completed | 1904 (122 years old) |
Storage & Hydraulics
| NID Storage | 875 acre-ft |
| Max Storage | 875 acre-ft |
| Normal Storage | 875 acre-ft |
| Surface Area | 89 acres |
| Drainage Area | 440 sq mi |
| Max Discharge | 23,350 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Hollingsworth & Vose Company |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 07/20/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NY00120 |
| Federal ID | NY00120 |
| More Info | State Dam Safety Program |