Midway Peaking LLC
Natural gas power plant in Fresno County, California. 139.8 MW of nameplate capacity across 2 generators, operated by CalPeak Power, LLC.
Also known as EIA plant 56639
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Key facts
- Capacity
- 139.8 MWNameplate
- Generators
- 2 operatingEIA-860M, August 2026
- Operating since
- May 2009First generator online
- Operator
- CalPeak Power, LLCEIA operator ID 59527
- Grid
- CAISOBalancing authority CISO
- Price nodes
- 1 CAISO nodeResource nodes with prices
- Location
- Fresno County, CA36.6541, −120.5797
- EIA plant ID
- 56639EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Midway Peaking produces
Free · EIA-923Net generation, 2025
6.45 GWh
6,453 MWh, final
Capacity factor, 2025
0.5%
2024: 1.3%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
6.5–85.6
GWh a year. Low 2025, high 2015
| 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 | Not reported | Not reported | 0 of 12 |
| 2006 | Not reported | Not reported | 0 of 12 |
| 2007 | Not reported | Not reported | 0 of 12 |
| 2008 | Not reported | Not reported | 0 of 12 |
| 2009 | 27,611 | Not reported | 12 of 12 |
| 2010 | 39,767 | 3.2% | 12 of 12 |
| 2011 | 74,153 | 6.1% | 12 of 12 |
| 2012 | 29,814 | 2.4% | 12 of 12 |
| 2013 | 40,874 | 3.3% | 12 of 12 |
| 2014 | 40,932 | 3.3% | 12 of 12 |
| 2015 | 85,564 | 7.0% | 12 of 12 |
| 2016 | 41,395 | 3.4% | 12 of 12 |
| 2017 | 66,714 | 5.4% | 12 of 12 |
| 2018 | 49,354 | 4.0% | 12 of 12 |
| 2019 | 51,141 | 4.2% | 12 of 12 |
| 2020 | 30,509 | 2.5% | 12 of 12 |
| 2021 | 23,849 | 1.9% | 12 of 12 |
| 2022 | 22,524 | 1.8% | 12 of 12 |
| 2023 | 20,267 | 1.7% | 12 of 12 |
| 2024 | 15,685 | 1.3% | 12 of 12 |
| 2025 | 6,453 | 0.5% | 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 · CAISOEmissions
Free · EPA CAMPDCO₂, 2025
4,484
US short tons. 2024: 10,820
SO₂, 2025
0
US short tons
NOx, 2025
1
US short tons
CO₂ per MWh, calculated
0.69 t
About 1,390 lb per MWh
2 of 2 EPA units reported CO₂ in 2025 (1, 2), matched to EIA plant 56639 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 |
|---|---|---|---|
| 1 | Natural Gas Fired Combustion Turbine | 69.9 | May 2009 |
| 2 | Natural Gas Fired Combustion Turbine | 69.9 | May 2009 |
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 CalPeak Power, LLC 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 Midway Peaking
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Questions about Midway Peaking
How much power does Midway Peaking LLC produce?
Midway Peaking LLC reported 6,453 MWh (6.45 GWh) of net generation in 2025, a 0.5% capacity factor on 139.8 MW of nameplate capacity.
Where is Midway Peaking LLC?
Midway Peaking LLC is in Fresno County, California, at 36.6541, −120.5797. It is in the California Independent System Operator balancing area (CISO).
Who operates Midway Peaking LLC?
EIA-860M for August 2026 lists CalPeak Power, LLC as the operator (EIA operator ID 59527). The operator is not always the owner.
When did Midway Peaking LLC start operating?
Its first generator began operating in May 2009, according to EIA-860M.
Does InfraMap have power prices for Midway Peaking LLC?
Yes. InfraMap has CAISO day-ahead and real-time prices at 1 price node linked to Midway Peaking LLC, 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
- CAISO 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