South Harper
Natural gas power plant in Cass County, Missouri. 351 MW of nameplate capacity across 3 generators, operated by Evergy Missouri West.
Also known as EIA plant 56151
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 351 MWNameplate
- Generators
- 3 operatingEIA-860M, August 2026
- Operating since
- August 2005First generator online
- Operator
- Evergy Missouri WestEIA operator ID 12698
- Grid
- SPPBalancing authority SWPP
- Price nodes
- 3 SPP nodesResource nodes with prices
- Location
- Cass County, MO38.6803, −94.4824
- EIA plant ID
- 56151EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power South Harper produces
Free · EIA-923Net generation, 2025
218 GWh
218,448 MWh, final
Capacity factor, 2025
7.1%
2024: 9.2%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
−0.8–284.5
GWh a year. Low 2015, high 2024
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | Not reported | Not reported | 0 of 12 |
| 2002 | Not reported | Not reported | 0 of 12 |
| 2003 | Not reported | Not reported | 0 of 12 |
| 2004 | Not reported | Not reported | 0 of 12 |
| 2005 | 0 | Not reported | 12 of 12 |
| 2006 | 117,148 | Not reported | 12 of 12 |
| 2007 | 178,708 | Not reported | 12 of 12 |
| 2008 | 106,578 | Not reported | 12 of 12 |
| 2009 | 49,236 | Not reported | 12 of 12 |
| 2010 | 57,942 | 1.9% | 12 of 12 |
| 2011 | 73,326 | 2.4% | 12 of 12 |
| 2012 | 141,590 | 4.6% | 12 of 12 |
| 2013 | 49,253 | 1.6% | 12 of 12 |
| 2014 | 3,073 | 0.1% | 12 of 12 |
| 2015 | −757 | -0.0% | 12 of 12 |
| 2016 | 4,655 | 0.2% | 12 of 12 |
| 2017 | 1 | 0.0% | 12 of 12 |
| 2018 | 38,764 | 1.3% | 12 of 12 |
| 2019 | 81,882 | 2.7% | 12 of 12 |
| 2020 | 55,289 | 1.8% | 12 of 12 |
| 2021 | 67,410 | 2.2% | 12 of 12 |
| 2022 | 216,594 | 7.0% | 12 of 12 |
| 2023 | 180,481 | 5.9% | 12 of 12 |
| 2024 | 284,455 | 9.2% | 12 of 12 |
| 2025 | 218,448 | 7.1% | 12 of 12 |
| 2026 (provisional, partial year) | Not reported | Not reported | 0 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free account · SPPEmissions
Free · EPA CAMPDCO₂, 2025
167,450
US short tons. 2024: 214,267
SO₂, 2025
1
US short tons
NOx, 2025
75
US short tons
CO₂ per MWh, calculated
0.77 t
About 1,533 lb per MWh
3 of 3 EPA units reported CO₂ in 2025 (1, 2, 3), matched to EIA plant 56151 through the EPA–EIA crosswalk. The per-MWh rate is EPA CO₂ divided by EIA-923 net generation. The two reporting boundaries can differ.
Water use
Free · EIA-923 cooling, USGSNo EIA cooling-water record for this plant in 2024.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| GT1 | Natural Gas Fired Combustion Turbine | 117.0 | August 2005 |
| GT2 | Natural Gas Fired Combustion Turbine | 117.0 | August 2005 |
| GT3 | Natural Gas Fired Combustion Turbine | 117.0 | August 2005 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists Evergy Missouri West as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Generation potential vs reported
Monthly potential at seasonal net capability, next to EIA-923 output. Shows how much of the plant's capability was used.
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Power plants near South Harper
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Questions about South Harper
How much power does South Harper produce?
South Harper reported 218,448 MWh (218 GWh) of net generation in 2025, a 7.1% capacity factor on 351 MW of nameplate capacity.
Where is South Harper?
South Harper is in Cass County, Missouri, at 38.6803, −94.4824. It is in the Southwest Power Pool balancing area (SWPP).
Who operates South Harper?
EIA-860M for August 2026 lists Evergy Missouri West as the operator (EIA operator ID 12698). The operator is not always the owner.
When did South Harper start operating?
Its first generator began operating in August 2005, according to EIA-860M.
Does InfraMap have power prices for South Harper?
Yes. InfraMap has SPP day-ahead and real-time prices at 3 price nodes linked to South Harper, with the hub price and node-to-hub basis. Prices are free with an InfraMap account; pricing node names are part of InfraMap Pro.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
- EPA CAMPD annual emissions through the EPA–EIA crosswalk, 1995 to 2025
- SPP day-ahead and real-time prices; node and hub assignments as of 2026-10-05
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page