Wild Springs

23015 161st Avenue, New Underwood, SD 57761

Plant Summary Information

Wild Springs is ranked #25 out of 50 power plants in South Dakota in terms of total annual net electricity generation.

Wild Springs generated 94.5 GWh during the 3-month period between May 2026 to August 2026.

Plant Name	Wild Springs
Utility Name	Geronimo Power
Location	Pennington County, SD
Initial Operation Date	June 2024
Last Update	Aug 2026
Annual Generation	267.6 GWh
Annual Consumption	1.0 M MMBtu
Ranked #2,221 out of 13,301 Power Plants Nationwide
Ranked #375 out of 7,209 Solar Power Plants Nationwide
Ranked #25 out of 50 South Dakota Power Plants
Ranked #1 out of 4 South Dakota Solar Power Plants
Fuel Types	Solar
Previous Operator	National Grid Renewables (2023 to 2024) Geronimo Power (2025 to 2025)

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Summary Information
Plant Name	Wild Springs (67018)
Plant Address	23015 161st Avenue, New Underwood, SD 57761
Utility	Geronimo Power (62759)
Latitude, Longitude	44.07, -102.84
Generation Dates on File	Jun 2024 to Aug 2026
Initial Operation Date	June 2024
Annual Generation	267.6 GWh
Fuel Types	Solar

Federal Energy Regulatory Commission (FERC) Information
FERC Cogeneration Status	No
FERC Small Power Producer Status	No
FERC Exempt Wholesale Generator Status	Yes
FERC Exempt Wholesale Generator Docket Number	24-15-000

Regulatory Information
Regulatory Status	Non-Regulated
NERC Region	MRO
Balancing Authority	Western Area Power Administration - Rocky Mountain Region (WACM)
NAICS Code	Utilities (22)
Sector	IPP Non-CHP (2)
Water Source
Ash Impoundment
Transmission / Distribution Owner	WAPA-- Western Area Power Administration (27000) SD
Grid Voltage	115.00 kV
Energy Storage	No

* Data obtained from the 2025 EIA 860 Report

Solar Details
Single Axis Tracking	Yes
Azimuth Angle	180
DC Net Capacity	163.36 MW
Thin Film CDTE	Yes
Net Metering Agreement	No
Virtual Net Metering Agreement	No

Owner Name	Address	Ownership
*We couldn't locate any owners for this plant*

Power plants with a similar annual net generation from Solar.

Rank	Plant Name	Plant Location	Annual Generation
#365	Saint Solar	Coolidge, AZ	275.0 GWh
#366	Upton County Solar	McCamey, TX	274.0 GWh
#367	Boulder Solar Power, LLC	Boulder City, NV	272.8 GWh
#368	Dougherty County Solar, LLC	Albany, GA	271.4 GWh
#369	Wilmot Energy Center LLC	Tucson, AZ	267.2 GWh
#370	Rancho Seco Solar II, LLC	Twin Cities, CA	269.3 GWh
#371	Starr Solar Ranch	Roma, TX	269.0 GWh
#372	Pleasant Creek Unit 2	Palo, IA	268.8 GWh
#373	Wistaria Ranch Solar	Calexico, CA	268.4 GWh
#374	Petersburg Energy Center	Petersburg, IN	267.6 GWh
#376	Elara Solar	Pearsall, TX	267.2 GWh
#377	Valentine Solar, LLC	Rosamond, CA	267.0 GWh
#378	Copperhead Solar, LLC	Riesel, TX	262.6 GWh
#379	Coldwater River Solar	Coldwater, MI	265.6 GWh
#380	American Kings Solar, LLC	Lemoore, CA	265.5 GWh
#381	Catalina Solar LLC	Rosamond, CA	264.9 GWh
#382	Tilden Solar	Coulterville, IL	264.7 GWh
#383	Kelso Solar	Benton, MO	264.7 GWh
#384	Great Cove Solar II	Saint Thomas, PA	263.9 GWh
#385	Hickory Solar	Jerseyville, IL	263.1 GWh

Below are closest 6 power plants surrounding Wild Springs.

Plant Name	Plant Location	Annual Generation	Distance
Ben French	Rapid City, SD	30.5 GWh	20.9 mi
Fall River Solar, LLC	Edgemont, SD	170.1 GWh	68 mi
Guernsey	Guernsey, WY	14.6 GWh	156.5 mi
Lange Generating Station	Rapid City, SD	144.5 GWh	21.3 mi
Spearfish Hydro	Spearfish, SD	18.4 GWh	57.6 mi
Willow Creek Wind Power LLC	Newell, SD	400.0 GWh	55.3 mi