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 85.1 GWh during the 3-month period between February 2026 to May 2026.

Plant Name	Wild Springs
Utility Name	Geronimo Power
Location	Pennington County, SD
Initial Operation Date	June 2024
Last Update	May 2026
Annual Generation	269.1 GWh
Annual Consumption	1.0 M MMBtu
Ranked #2,170 out of 13,081 Power Plants Nationwide
Ranked #344 out of 7,015 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 May 2026
Initial Operation Date	June 2024
Annual Generation	269.1 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
#334	East Blackland Solar Project 1	Manor, TX	275.9 GWh
#335	Upton County Solar	McCamey, TX	275.4 GWh
#336	Starr Solar Ranch	Roma, TX	274.6 GWh
#337	Kiowa County Solar Project	Snyder, OK	274.4 GWh
#338	Wood County	Nekoosa, WI	272.9 GWh
#339	Wilmot Energy Center LLC	Tucson, AZ	270.0 GWh
#340	Wistaria Ranch Solar	Calexico, CA	271.3 GWh
#341	Valentine Solar, LLC	Rosamond, CA	270.2 GWh
#342	Honeysuckle Solar Farm	New Carlisle, IN	269.3 GWh
#343	Pleasant Creek Unit 2	Palo, IA	269.2 GWh
#345	Dougherty County Solar, LLC	Albany, GA	268.3 GWh
#346	Luna Valley	Mendota, CA	266.8 GWh
#347	Brazoria Solar I	Angleton, TX	265.1 GWh
#348	Catalina Solar LLC	Rosamond, CA	264.9 GWh
#349	Pine Forest Solar I	Pickton, TX	251.1 GWh
#350	Elara Solar	Pearsall, TX	263.5 GWh
#351	Milford Solar 1	Milford, UT	263.1 GWh
#352	Oberon IA	Odessa, TX	262.9 GWh
#353	Rancho Seco Solar II, LLC	Twin Cities, CA	262.4 GWh
#354	Resurgence Solar	Boron, CA	246.3 GWh

Below are closest 6 power plants surrounding Wild Springs.

Plant Name	Plant Location	Annual Generation	Distance
Ben French	Rapid City, SD	17.4 GWh	20.9 mi
Fall River Solar, LLC	Edgemont, SD	170.8 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	381.0 GWh	55.3 mi