- Clean firm
- Operating
- 10 · 100 · 1,000 MW
Map
- Clean firm
- Operating
Exchequer: location. Basemap: Protomaps, © OpenStreetMap contributors, ODbL.
Exchequer
Power plant · Hydro
Key facts
Power plant · Hydroran 30% of 2025 Operating- Capacity
- Capacity: sourceEIA-860M · Open licenseMW
- Commissioned
- 1967
- Net generation, 2025
- 245,804 MWh
- Grid
- 115 kV to Pacific Gas & Electric Co (CISO)
- Location
- Mariposa County, California
- Operated by
- Merced Irrigation DistrictSourceEIA-860M Preliminary Monthly Electric Generator Inventory
Operations
- Net generation, 2025
- 245,804
MWh - Fuel burned, 2025
- 838,682
MMBtu - Capacity factor, 2025
- 29.7
% - Heat rate, 2025
- Not stated
| Year | Net generation (MWh) | Fuel burned (MMBtu) | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|---|
| 2025 | 245,804 | 838,682 | 29.7% | — |
| 2024 | 267,905 | 914,091 | 32.3% | — |
| 2023 | 250,621 | 855,120 | 30.3% | — |
| 2022 | 121,978 | 416,189 | 14.7% | — |
| 2021 | 134,450 | 1,189,076 | 16.2% | — |
| 2020 | 205,063 | 1,797,787 | 24.7% | — |
| 2019 | 343,405 | 3,058,024 | 41.5% | — |
| 2018 | 240,272 | 2,187,437 | 29.0% | — |
| 2017 | 438,660 | 4,041,373 | 53.0% | — |
| 2016 | 148,222 | 1,369,402 | 17.9% | — |
| 2015 | 10,858 | 103,021 | 1.3% | — |
| 2014 | 77,225 | 734,713 | 9.3% | — |
| 2013 | 138,218 | 1,318,739 | 16.7% | — |
| 2012 | 204,624 | 1,947,944 | 24.6% | — |
| 2011 | 479,769 | 4,661,436 | 58.0% | — |
| 2010 | 33,024 | 322,182 | 4.0% | — |
| 2009 | 192,874 | 1,882,449 | 23.3% | — |
| 2008 | 163,280 | 1,608,962 | 19.7% | — |
| 2007 | 427,934 | 4,229,700 | 51.7% | — |
| 2006 | 592,325 | 5,875,273 | 71.5% | — |
| 2005 | 403,900 | 4,038,596 | 48.8% | — |
| 2004 | 221,559 | 2,220,464 | 26.7% | — |
| 2003 | 211,871 | 2,169,771 | 25.6% | — |
| 2002 | 218,493 | 2,222,729 | 26.4% | — |
| 2001 | 253,185 | 2,616,161 | 30.6% | — |
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 Preliminary Monthly Electric Generator Inventory
- Global Energy Monitor — Global Integrated Power Tracker (unit-level power plants, eight technologies, all statuses)Global 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.
- EIA Open Data bulk file — Electricity (ELEC.zip; monthly plant net generation and fuel consumption since 2001)Source: U.S. Energy Information Administration, Electricity bulk data (Form EIA-923 monthly plant series)