Stillwater - South Dam
Stillwater - South Dam is an earth dam located in Herkimer County, New York, built in 1924. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Stillwater - South Dam
The primary purpose of Stillwater - South Dam 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 Hudson River-black River Regulating District (state). It impounds the Beaver River near Webb.
The dam stands 20 feet tall and stretches 330 feet across, creates a reservoir covering 6,490 acres, has a maximum storage capacity of 108,000 acre-feet, and collects water from a drainage area of 172 square miles. Completed in 1924, the structure is over a century old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 08/11/2022.
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Location
| State | New York |
| County | Herkimer |
| Nearest City | Webb |
| River/Stream | Beaver River |
| Coordinates | 43.89771, -75.05013 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 330 ft |
| Year Completed | 1924 (102 years old) |
Storage & Hydraulics
| NID Storage | 108,000 acre-ft |
| Max Storage | 108,000 acre-ft |
| Normal Storage | 108,000 acre-ft |
| Surface Area | 6,490 acres |
| Drainage Area | 172 sq mi |
| Max Discharge | 600 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Hudson River-Black River Regulating District |
| Owner Type | State |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 08/11/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NY00316 |
| Federal ID | NY00316S001 |
| More Info | State Dam Safety Program |