- Combustion
- Operating
- 10 · 100 · 1,000 MW
Map
- Combustion
- Operating
Big Stone: location. Basemap: Protomaps, © OpenStreetMap contributors, ODbL.
Big Stone
Power plant · Coal
Key facts
Power plant · Coalran 51% of 2025 Operating- Capacity
- Capacity: sourceEIA-860M · Open licenseMW
- Commissioned
- 1975
- Net generation, 2025
- 2,029,575 MWh
- Grid
- 230 kV to Otter Tail Power Co (MISO)
- Location
- Grant County, South Dakota
- Operated by
- Otter Tail Power Co
Operations
- Net generation, 2025
- 2,029,575
MWh - Fuel burned, 2025
- 22,513,185
MMBtu - Capacity factor, 2025
- 51.4
% - Heat rate, 2025
- 11,093
Btu/kWh
| Year | Net generation (MWh) | Fuel burned (MMBtu) | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|---|
| 2026 (8 of 12 months) | 1,036,499 | 11,508,678 | — | 11,103 |
| 2025 | 2,029,575 | 22,513,185 | 51.4% | 11,093 |
| 2024 | 1,565,696 | 18,161,305 | 39.5% | 11,600 |
| 2023 | 1,566,639 | 18,004,599 | 39.6% | 11,492 |
| 2022 | 1,876,689 | 20,581,464 | 47.5% | 10,967 |
| 2021 | 1,640,595 | 17,982,812 | 41.5% | 10,961 |
| 2020 | 1,650,135 | 18,462,155 | 41.6% | 11,188 |
| 2019 | 2,619,088 | 27,771,347 | 66.3% | 10,603 |
| 2018 | 2,343,295 | 24,640,795 | 59.3% | 10,515 |
| 2017 | 2,064,617 | 22,392,539 | 52.3% | 10,846 |
| 2016 | 2,084,287 | 23,210,192 | 52.6% | 11,136 |
| 2015 | 1,498,688 | 16,307,906 | 37.9% | 10,882 |
| 2014 | 2,692,593 | 29,563,593 | 68.2% | 10,980 |
| 2013 | 2,854,757 | 30,894,337 | 72.3% | 10,822 |
| 2012 | 2,830,363 | 30,900,957 | 71.5% | 10,918 |
| 2011 | 2,459,405 | 27,125,772 | 62.3% | 11,029 |
| 2010 | 3,169,192 | 34,304,491 | 80.2% | 10,824 |
| 2009 | 3,101,444 | 33,391,315 | 78.5% | 10,766 |
| 2008 | 3,574,952 | 38,224,998 | 90.2% | 10,692 |
| 2007 | 2,520,945 | 26,678,722 | 63.8% | 10,583 |
| 2006 | 3,174,012 | 32,901,016 | 80.3% | 10,366 |
| 2005 | 2,846,712 | 30,194,662 | 72.0% | 10,607 |
| 2004 | 3,477,704 | 37,435,371 | 87.8% | 10,764 |
| 2003 | 3,282,649 | 34,743,182 | 83.1% | 10,584 |
| 2002 | 3,119,519 | 32,650,511 | 79.0% | 10,466 |
| 2001 | 3,462,038 | 35,092,180 | 87.6% | 10,136 |
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)