Stillwater Reservoir Hydro
Stillwater Dam, Webb, NY 13350Plant Summary Information
Stillwater Reservoir Hydro is ranked #123 out of 148 hydroelectric power plants in New York in terms of total annual net electricity generation.
Stillwater Reservoir Hydro is comprised of 1 generator and generated 1.4 GWh during the 3-month period between September 2025 to December 2025.
| Plant Name | Stillwater Reservoir Hydro |
|---|---|
| Utility Name | Watershed Hydropower Corp |
| Location | Herkimer County, NY |
| Initial Operation Date | January 1987 |
| Last Update | Dec 2025 |
| Annual Generation | 4.9 GWh |
| Annual Consumption | 16.6 k MMBtu |
| Ranked #8,289 out of 13,081 Power Plants Nationwide | |
| Ranked #1,094 out of 1,311 Water Power Plants Nationwide | |
| Ranked #596 out of 1,045 New York Power Plants | |
| Ranked #123 out of 148 New York Water Power Plants | |
| Fuel Types | Water |
| Previous Operators |
Stillwater Associates (2013 to 2023) Northern Power & Light (2024 to 2024) Watershed Hydropower Corp (2025 to 2025) |
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Monthly Net Generation for Stillwater Reservoir Hydro
Monthly Plant Fuel Consumption for Stillwater Reservoir Hydro
Stillwater Reservoir Hydro Details
| Summary Information | |
|---|---|
| Plant Name | Stillwater Reservoir Hydro (50513) |
| Plant Address | Stillwater Dam, Webb, NY 13350 |
| Utility | Watershed Hydropower Corp (66645) |
| Latitude, Longitude | 43.89739, -75.04 |
| Generation Dates on File | Jan 2001 to Dec 2025 |
| Initial Operation Date | January 1987 |
| Annual Generation | 4.9 GWh |
| Fuel Types | Water |
| Federal Energy Regulatory Commission (FERC) Information | |
| FERC Cogeneration Status | No |
| FERC Small Power Producer Status | Yes |
| FERC Small Power Producer Docket Number | 94-146-000 |
| FERC Exempt Wholesale Generator Status | No |
| Regulatory Information | |
|---|---|
| Regulatory Status | Non-Regulated |
| NERC Region | NPCC |
| Balancing Authority | New York Independent System Operator (NYIS) |
| NAICS Code | Utilities (22) |
| Sector | IPP Non-CHP (2) |
| Water Source | Beaver River |
| Ash Impoundment | |
| Transmission / Distribution Owner | Niagara Mohawk Power Corp. (13573) NY |
| Grid Voltage | 34.50 kV |
| Energy Storage | No |
Generator GEN1 Details Operating January 1987
| Technology | Conventional Hydroelectric |
|---|---|
| Prime Mover | Hydroelectric Turbine |
| Ownership | Wholly Owned by Other Entity |
| Nameplate Capacity | 1.8 MW |
| Nameplate Power Factor | 1 |
| Summer Capacity | 1.8 MW |
| Winter Capacity | 1.8 MW |
| Minimum Load | 0.3 MW |
| Uprate/Derate Completed | No |
|---|---|
| Status | Operating |
| First Operation Date | January 1987 |
| Combined Heat & Power | No |
| Sector Name | IPP Non-CHP (2) |
| Energy Source | Water |
| Time From Cold Shutdown To Full Load | 10M |
| Multiple Fuels | No |
Stillwater Reservoir Hydro Plant Owners
| Owner Name | Address | Ownership |
|---|---|---|
| Hudson River-Black River Regulating District | 54 State St Ste 501, Albany, NY 12207 | 100.00% |
Power Plants with Similar Net Generation
Power plants with a similar annual net generation from Water.
| Rank | Plant Name | Plant Location | Annual Generation |
|---|---|---|---|
| #1084 | Fulton Hydro | Fulton, NY | 5.0 GWh |
| #1085 | Gaston Shoals | Blacksburg, SC | 5.0 GWh |
| #1086 | Morrisville | Morrisville, VT | 5.0 GWh |
| #1087 | Brigham City | Brigham, UT | 5.0 GWh |
| #1088 | Radford | Radford, VA | 5.0 GWh |
| #1089 | Phoenix | Sonora, CA | 4.9 GWh |
| #1090 | Diana Hydroelectric | Harrisville, NY | 4.9 GWh |
| #1091 | High Falls | High Falls, NY | 4.9 GWh |
| #1092 | Cataract (MI) | Gwinn, MI | 4.9 GWh |
| #1093 | Whitewater Hydro Plant | California, CA | 4.9 GWh |
| #1095 | Wanship | Wanship, UT | 4.9 GWh |
| #1096 | Dunn Paper | Gouverneur, NY | 4.8 GWh |
| #1097 | Spillway | Pineville, SC | 4.8 GWh |
| #1098 | Upper Sterling | Rock Falls, IL | 4.8 GWh |
| #1099 | Kleber | Onaway, MI | 4.8 GWh |
| #1100 | Clam River Dam | Danbury, WI | 4.8 GWh |
| #1101 | Piedmont Hydro Power Project | Piedmont, SC | 4.8 GWh |
| #1102 | Upper Pacolet Hydro | Pacolet, SC | 4.8 GWh |
| #1103 | East Barnet | Barnet, VT | 4.7 GWh |
| #1104 | East Portal Generator | Chatsworth, CA | 4.7 GWh |
Nearby Power Plants
Below are closest 20 power plants surrounding Stillwater Reservoir Hydro.
| Plant Name | Plant Location | Annual Generation | Distance |
|---|---|---|---|
| Belfort | Croghan, NY | 10.4 GWh | 14.7 mi |
| Browns Falls | Oswegatchie, NY | 49.2 GWh | 21.7 mi |
| CH Resources Beaver Falls | Beaver Falls, NY | 11.7 GWh | 19.6 mi |
| Chambers 3 - Lewis County | Lowville, NY | 2.5 GWh | 24.3 mi |
| Diana Hydroelectric | Harrisville, NY | 4.9 GWh | 22.5 mi |
| Eagle | Croghan, NY | 28.4 GWh | 8.1 mi |
| Effley | Croghan, NY | 13.8 GWh | 12 mi |
| Elmer | Croghan, NY | 10.0 GWh | 12.5 mi |
| Flat Rock | Fine, NY | 14.6 GWh | 22.5 mi |
| Gouldtown | Lyonsdale, NY | 5.7 GWh | 24.7 mi |
| High Falls - Croghan NY | Croghan, NY | 25.0 GWh | 16.7 mi |
| Kosterville | Lyonsdale, NY | 1.8 GWh | 24.4 mi |
| Lower Beaver Falls Project | Beaver Falls, NY | 3.2 GWh | 19.5 mi |
| Lyonsdale Associates | Lyons Falls, NY | 10.0 GWh | 23.4 mi |
| Martinsburg CSG LLC | Lowville, NY | 3.9 GWh | 24.4 mi |
| Moshier | Lowville, NY | 35.1 GWh | 5.1 mi |
| Soft Maple | Croghan, NY | 31.6 GWh | 10.2 mi |
| Taylorville | Croghan, NY | 20.7 GWh | 14.2 mi |
| Upper Beaver Falls Project | Beaver Falls, NY | 9.5 GWh | 19.3 mi |
| Upper Newton Falls | Newton Falls, NY | 5.8 GWh | 22 mi |