Generation
EIA-923 through Jul 2026The same SPP plants made 1.4% more power than a year earlier. Wind added 4.9 TWh and coal fell 2.6 TWh. Clean power is 47% of its output, up 7 points since 2019.
How SPP got here
Share of net generation each yearClean power 40% in 2019, 47% in 2025. Hover a year for its mix.
Fuel by fuel
Share is 2025; Jan–Jul compares the same plantsWho makes SPP’s power
2025, 290 TWhEach block is a plant. Hover to see it, click to open its page.
Each block is one plant, sized by its 2025 output; the lighter block holds the smaller plants. Pumped storage, which nets negative, is left out.
This year against last
20262025Running total, same plants, each on its own scaleBiggest gains
Leland Olds+1.0 TWh1.2 TWh → 2.3Nebraska City+874 GWh3.4 TWh → 4.3Wagon Wheel Wind+775 GWhfrom zeroWillow Creek Wind (OK)+556 GWhfrom zeroBiggest drops
GREC−1.3 TWh2.6 TWh → 1.3Northeastern−1.2 TWh2.9 TWh → 1.7Welsh−738 GWh2.4 TWh → 1.6La Cygne−704 GWh4.0 TWh → 3.3New this year
13 plants, 2.2 GW, made 2.8 TWh by July.
Battery discharge
GWh a month2026 months are provisional: monthly reporters only. Plants that report once a year appear when the 2026 file is final.
CO₂ intensity
lb per MWh896 lb/MWh in 2025, down 11% since 2020. The seven ISOs together: 767.
EIA-923: 2019–2025 final; Jan–Jul 2026 counts plants that report monthly (about 82% of SPP’s output last year) and compares them with the same plants in 2025. CO₂ from 2020: EPA CAMPD, or EIA-923 fuel use × EPA emission factors where CAMPD misses a plant or covers it in part. Sources