Flat Ridge 4
1292 NE 15 Ave, Harper, KS 67058Plant Summary Information
Flat Ridge 4 is ranked #44 out of 176 power plants in Kansas in terms of total annual net electricity generation.
Flat Ridge 4 generated 136.8 GWh during the 3-month period between November 2025 to February 2026.
| Plant Name | Flat Ridge 4 |
|---|---|
| Utility Name | Public Service Co of Oklahoma |
| Location | Harper County, KS |
| Initial Operation Date | June 2025 |
| Last Update | Feb 2026 |
| Annual Generation | 374.6 GWh |
| Annual Consumption | 1.3 M MMBtu |
| Ranked #1,761 out of 13,301 Power Plants Nationwide | |
| Ranked #518 out of 1,377 Wind Power Plants Nationwide | |
| Ranked #44 out of 176 Kansas Power Plants | |
| Ranked #35 out of 52 Kansas Wind Power Plants | |
| Fuel Types | Wind |
| Previous Operator |
Invenergy Services LLC (2024 to 2024) Public Service Co of Oklahoma (2025 to 2025) |
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Monthly Net Generation for Flat Ridge 4
Monthly Plant Fuel Consumption for Flat Ridge 4
Flat Ridge 4 Details
| Summary Information | |
|---|---|
| Plant Name | Flat Ridge 4 (68222) |
| Plant Address | 1292 NE 15 Ave, Harper, KS 67058 |
| Utility | Public Service Co of Oklahoma (15474) |
| Latitude, Longitude | 37.34112, -98.01313 |
| Generation Dates on File | Jun 2025 to Feb 2026 |
| Initial Operation Date | June 2025 |
| Annual Generation | 374.6 GWh |
| Fuel Types | Wind |
| Federal Energy Regulatory Commission (FERC) Information | |
| FERC Cogeneration Status | No |
| FERC Small Power Producer Status | No |
| FERC Exempt Wholesale Generator Status | No |
| Regulatory Information | |
|---|---|
| Regulatory Status | Regulated |
| NERC Region | MRO |
| Balancing Authority | Southwest Power Pool (SWPP) |
| NAICS Code | Utilities (22) |
| Sector | Electric Utility (1) |
| Water Source | |
| Ash Impoundment | |
| Transmission / Distribution Owner | Evergy Kansas Central, Inc (22500) KS |
| Grid Voltage | 345.00 kV |
| Energy Storage | No |
Generator OP Details Operating June 2025
| Technology | Onshore Wind Turbine |
|---|---|
| Prime Mover | Wind Turbine, Onshore |
| Ownership | Single Owner |
| Nameplate Capacity | 134 MW |
| Summer Capacity | 134 MW |
| Winter Capacity | 134 MW |
| Uprate/Derate Completed | No |
|---|---|
| Status | Operating |
| First Operation Date | June 2025 |
| Sector Name | Electric Utility (1) |
| Energy Source | Wind |
| Turbines/Hydrokinetic Buoys | 30 |
| Turbine Details | |
| Number Of Turbines | 30 |
|---|---|
| Predominant Turbine Manufacturer | Vestas |
| Predominant Turbine Model Number | V150-14.5 |
| Design Wind Speed | 19 MPH |
| Wind Quality Class | 3 - Low Wind |
| Turbine Hub Height Feet | 345 |
Flat Ridge 4 Plant Owners
| Owner Name | Address | Ownership | We couldn't locate any owners for this plant |
|---|
Power Plants with Similar Net Generation
Power plants with a similar annual net generation from Wind.
| Rank | Plant Name | Plant Location | Annual Generation |
|---|---|---|---|
| #508 | Spinning Spur Wind II | Adrian, TX | 381.2 GWh |
| #509 | Blue Summit II Wind | Vernon, TX | 379.9 GWh |
| #510 | Washington Wind | Goldendale, WA | 379.0 GWh |
| #511 | Caprock Wind Farm | San Jon, NM | 378.7 GWh |
| #512 | Grand Meadow | Dexter, MN | 378.7 GWh |
| #513 | Downeast Wind | Columbia, ME | 378.5 GWh |
| #514 | Pontotoc Wind | Roff, OK | 376.9 GWh |
| #515 | Post Oak Wind LLC | Abilene, TX | 375.9 GWh |
| #516 | Clearwater Wind III | Miles City, MT | 375.4 GWh |
| #517 | Pegasus Wind | Reese, MI | 375.0 GWh |
| #519 | Milford Wind Corridor I LLC | Milford, UT | 373.9 GWh |
| #520 | Pocahontas Prairie Wind Farm | Pomeroy, IA | 373.5 GWh |
| #521 | Coyote Ridge | White, SD | 370.9 GWh |
| #522 | Quilt Block Wind Farm LLC | Darlington, WI | 369.3 GWh |
| #523 | Shiloh Wind Project 2 LLC | Birds Landing, CA | 369.0 GWh |
| #524 | Bitter Ridge Wind Farm, LLC | Redkey, IN | 368.5 GWh |
| #525 | Crescent Wind Park | Hillsdale, MI | 365.7 GWh |
| #526 | Tyler Bluff Wind Project, LLC | Muenster, TX | 365.5 GWh |
| #527 | Barton Windpower LLC | Kensett, IA | 365.4 GWh |
| #528 | North Sky River Energy LLC | Weldon, CA | 364.8 GWh |
Nearby Power Plants
Below are closest 20 power plants surrounding Flat Ridge 4.
| Plant Name | Plant Location | Annual Generation | Distance |
|---|---|---|---|
| Anthony | Anthony, KS | 13.0 MWh | 13.1 mi |
| Cheney Solar | Cheney, KS | 2.3 GWh | 25.4 mi |
| Flat Ridge 2 Wind Energy LLC | Zenda, KS | 1.3 TWh | 13.7 mi |
| Flat Ridge 3 | Zenda, KS | 506.1 GWh | 22.5 mi |
| Flat Ridge 5 | Harper, KS | 546.5 GWh | 9.7 mi |
| Flat Ridge Wind Energy LLC | Isabel, KS | 178.0 GWh | 24.6 mi |
| Flat Ridge Wind Farm | Nashville, KS | 34.8 GWh | 24.6 mi |
| Gordon Evans Energy Center | Colwich, KS | 321.9 GWh | 41.1 mi |
| Grant Plains Wind, LLC | Medford, OK | 545.6 GWh | 30.7 mi |
| Grant Wind, LLC | Medford, OK | 496.3 GWh | 33.5 mi |
| Kingman Municipal Power and Light Plant | Kingman, KS | 1.1 GWh | 4.3 mi |
| Kingman Wind | Cunningham, KS | 808.1 GWh | 35.4 mi |
| Maize | Colwich, KS | 2.3 GWh | 40.3 mi |
| Mulvane 2 | Mulvane, KS | 61.0 MWh | 44.7 mi |
| Ninnescah Wind Energy, LLC | Cunningham, KS | 803.9 GWh | 35.4 mi |
| Pixley Solar Energy | Medicine Lodge, KS | 446.1 GWh | 27.3 mi |
| Rock Falls Wind Farm LLC | Braman, OK | 386.9 GWh | 43.1 mi |
| Wellington 1 | Wellington, KS | 6.1 GWh | 33.8 mi |
| Wellington 2 | Wellington, KS | 3.1 GWh | 36.8 mi |
| WPWP | Wellington, KS | 1.2 TWh | 44 mi |