Portal
Hydro power plant in Fresno County, California. 10.8 MW of nameplate capacity across 1 generator, operated by Southern California Edison Co.
Also known as Portal Powerhouse · EIA plant 354
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Key facts
- Capacity
- 10.8 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- December 1956First generator online
- Operator
- Southern California Edison CoEIA operator ID 17609
- Grid
- CAISOBalancing authority CISO
- Price nodes
- 1 CAISO nodeResource nodes with prices
- Location
- Fresno County, CA37.2570, −119.1589
- EIA plant ID
- 354EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Portal produces
Free · EIA-923Net generation, 2025
26.2 GWh
26,163 MWh, final
Capacity factor, 2025
27.7%
2024: 19.8%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
9.7–33.3
GWh a year. Low 2015, high 2017
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | 46,397 | Not reported | 12 of 12 |
| 2001 | 37,473 | Not reported | 12 of 12 |
| 2002 | 39,323 | Not reported | 12 of 12 |
| 2003 | 33,320 | Not reported | 12 of 12 |
| 2004 | 36,295 | Not reported | 12 of 12 |
| 2005 | 35,022 | Not reported | 12 of 12 |
| 2006 | 25,040 | Not reported | 12 of 12 |
| 2007 | 39,228 | Not reported | 12 of 12 |
| 2008 | 20,643 | Not reported | 12 of 12 |
| 2009 | 25,352 | Not reported | 12 of 12 |
| 2010 | 23,701 | 25.1% | 12 of 12 |
| 2011 | 8,782 | 9.3% | 12 of 12 |
| 2012 | 14,961 | 15.8% | 12 of 12 |
| 2013 | 15,953 | 16.9% | 12 of 12 |
| 2014 | 22,880 | 24.2% | 12 of 12 |
| 2015 | 9,696 | 10.2% | 12 of 12 |
| 2016 | 11,019 | 11.6% | 12 of 12 |
| 2017 | 33,309 | 35.2% | 12 of 12 |
| 2018 | 9,717 | 10.3% | 12 of 12 |
| 2019 | 21,961 | 23.2% | 12 of 12 |
| 2020 | 16,201 | 17.1% | 12 of 12 |
| 2021 | 11,402 | 12.1% | 12 of 12 |
| 2022 | 19,379 | 20.5% | 12 of 12 |
| 2023 | 21,161 | 22.4% | 12 of 12 |
| 2024 | 18,737 | 19.8% | 12 of 12 |
| 2025 | 26,163 | 27.7% | 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 CAMPDNo EPA emissions units are linked to this plant.
Water use
Free · EIA-923 cooling, USGSNo EIA cooling-water record for this plant in 2024. Plants without steam cooling, such as wind, solar and batteries, do not report cooling water.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| 1 | Conventional Hydroelectric | 10.8 | December 1956 |
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 Southern California Edison Co as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
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Power plants near Portal
More plants operated by Southern California Edison Co
Questions about Portal
How much power does Portal produce?
Portal reported 26,163 MWh (26.2 GWh) of net generation in 2025, a 27.7% capacity factor on 10.8 MW of nameplate capacity.
Where is Portal?
Portal is in Fresno County, California, at 37.2570, −119.1589. It is in the California Independent System Operator balancing area (CISO).
Who operates Portal?
EIA-860M for August 2026 lists Southern California Edison Co as the operator (EIA operator ID 17609). The operator is not always the owner.
When did Portal start operating?
Its first generator began operating in December 1956, according to EIA-860M.
Does InfraMap have power prices for Portal?
Yes. InfraMap has CAISO day-ahead and real-time prices at 1 price node linked to Portal, 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)
- CAISO day-ahead and real-time prices; node and hub assignments as of 2026-10-05
- Plant names from OpenStreetMap, © OpenStreetMap contributors (ODbL)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page