Day County Wind LLC — Plant Summary
- EIA Plant ID
- 57194
- Capacity
- 99 MW
- Primary Fuel
- Wind
- Technology
- Onshore Wind Turbine
- Status
- Operating
- Location
- Day, SD
- Operating Since
- 2010
- Generators
- 1
- Operator
- Day County Wind LLC
- Parent Company
- NextEra Energy
- Annual Generation
- 439,195 MWh
- Capacity Factor
- 50.6%
- Balancing Authority
- Southwest Power Pool
- ISO/RTO
- SPP
- NERC Region
- MRO
Day County Wind LLC
OperatingWindGEM: retired
Ranked #15 of 25 Wind plants in SD#752 of 1442 nationally
99 MW Wind operating in Day, SD — Southwest Power Pool
EIAGEMWD
99 MW
Nameplate Capacity
1
Generators
unit
Onshore Wind Turbine
Technology
2010
Operating Since
Location
Coordinates
45.7885, -100.2710
County
Day, SD
Nearby Plants
- Campbell County Wind FarmWind94.3 MW · 3.9 km
Ownership & Operator
Owner data does not fully agree across sources.
EIA typically reports the operating utility, while GEM resolves to the financial owner or parent corporation. Both can be correct.
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Day County Wind LLC | NextEra Energy | — |
| Owner(s) | Day County Wind LLC | NextEra Energy | — |
| Status | Operating | retired | — |
Ownership Chain
About
Day County Wind LLC is a 99 MW wind power plant located in Day County, South Dakota. The plant began operating in 2010 and utilizes one generator. It is owned and operated by Day County Wind LLC, a subsidiary of NextEra Energy. The facility consists of onshore wind turbines manufactured by GE Wind, specifically the GE1.6-91 model, with a rotor diameter of 91 meters and a hub height of 80 meters.
The plant's primary fuel source is wind (WND). In its most recent year of operation, Day County Wind LLC generated 439,195 MWh of electricity, achieving a capacity factor of 50.6%. The plant operates within the Southwest Power Pool (SPP) balancing authority and the Midwest Reliability Organization (MRO) NERC region. Day County Wind LLC ranks as the 15th largest wind farm in South Dakota out of 24, and 745th nationally out of 1424.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
MRO
Balancing Authority
Southwest Power Pool
Grid Voltage
115 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
Generation
39.6K MWh
Latest Month
439.2K MWh
Annual Generation
50.6%
Capacity Factor
Jan 2023 – Dec 2025
Financial Data
No financial data available for this plant.
Pricing & Market Data
HIGH confidenceMarket Position
ISO/RTO Market
SPP
LMP Node
WAUE.BEPM.DAYCOUNTY1
Pricing Hub
SPP North Hub
Node Source
Curated node match
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