- Storage
- Operating
- 10 · 100 · 1,000 MW
Map
- Storage
- Operating
Mormon Flat: location. Basemap: Protomaps, © OpenStreetMap contributors, ODbL.
Mormon Flat
Power plant · Pumped hydro storage
Key facts
Power plant · Pumped hydro storageran 8% of 2025 Operating- Capacity
- Capacity: sourceEIA-860M · Open licenseMW
- Commissioned
- 1926
- Net generation, 2025
- 45,690 MWh
- Grid
- 115 kV to Salt River Project (SRP)
- Location
- Maricopa County, Arizona
- Operated by
- Salt River ProjectSourceEIA-860M Preliminary Monthly Electric Generator Inventory
Operations
- Net generation, 2025
- 45,690
MWh - Fuel burned, 2025
- 53,101
MMBtu - Capacity factor, 2025
- 8.2
% - Heat rate, 2025
- Not stated
| Year | Net generation (MWh) | Fuel burned (MMBtu) | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|---|
| 2026 (8 of 12 months) | 24,990 | 1,050 | — | — |
| 2025 | 45,690 | 53,101 | 8.2% | — |
| 2024 | 54,256 | 79,673 | 9.7% | — |
| 2023 | 67,830 | 59,357 | 12.2% | — |
| 2022 | 38,709 | 7,519 | 7.0% | — |
| 2021 | 38,200 | 15,176 | 6.9% | — |
| 2020 | 28,888 | 26,503 | 5.2% | — |
| 2019 | 25,370 | 12,067 | 4.6% | — |
| 2018 | 17,190 | 108,920 | 3.1% | — |
| 2017 | 7,363 | 85,543 | 1.3% | — |
| 2016 | 22,336 | 95,165 | 4.0% | — |
| 2015 | 7,977 | 65,578 | 1.4% | — |
| 2014 | 5,195 | 41,131 | 0.9% | — |
| 2013 | 13,075 | 142,170 | 2.4% | — |
| 2012 | 35,532 | 186,942 | 6.4% | — |
| 2011 | 36,139 | 98,103 | 6.5% | — |
| 2010 | 76,635 | 169,374 | 13.8% | — |
| 2009 | 58,892 | 133,830 | 10.6% | — |
| 2008 | 23,542 | 70,544 | 4.2% | — |
| 2007 | 35,529 | 79,686 | 6.4% | — |
| 2006 | 47,064 | 540,120 | 8.5% | — |
| 2005 | 27,229 | 328,917 | 4.9% | — |
| 2004 | -7,229 | 145,470 | — | — |
| 2003 | 101,503 | 1,027,551 | 18.2% | — |
| 2002 | 61,846 | 1,071,859 | 11.1% | — |
| 2001 | 116,676 | 1,451,434 | 21.0% | — |
How these are worked out
Net generation and fuel burned are the monthly figures EIA publishes in its bulk electricity file, from the plant's Form 923 reports; a year is the sum of its months. Capacity factor is a full year's net generation over today's nameplate capacity times the hours in that year (8,784 in a leap year), so a plant uprated or partly retired since reads against its current size; heat rate is fuel burned over net generation, for plants that burn fuel. A year with fewer than twelve months stated has no capacity factor, and a value outside the plausible range is left blank rather than shown. By month, the charts apply the same rules to each month's own hours and fuel.
Sources
3 sourcesSources
- EIA-860M
- GEMGlobal Integrated Power Tracker, Global Energy Monitor, September 2026 release (https://globalenergymonitor.org/projects/global-integrated-power-tracker), CC BY 4.0. Modified by Inframation: TransitionZero-sourced rows removed; statuses and technologies mapped to Inframation's vocabulary; figures aggregated. Copyright © Global Energy Monitor. Global Integrated Power Tracker, September 2026 release. Distributed under a Creative Commons Attribution 4.0 International License.
- EIASource: U.S. Energy Information Administration, Electricity bulk data (Form EIA-923 monthly plant series)