- Clean firm
- Operating
- 10 · 100 · 1,000 MW
Map
- Clean firm
- Operating
Rainbow (CT): location. Basemap: Protomaps, © OpenStreetMap contributors, ODbL.
Rainbow (CT)
Power plant · Hydro
Key facts
Power plant · Hydroran 30% of 2025 Operating- Capacity
- Capacity: sourceEIA-860M · Open licenseMW
- Commissioned
- 1925
- Net generation, 2025
- 20,905 MWh
- Grid
- 28 kV to Connecticut Light & Power Co (ISNE)
- Location
- Hartford County, Connecticut
- Operated by
- Farmington River Power CompanySourceEIA-860M Preliminary Monthly Electric Generator Inventory
Operations
- Net generation, 2025
- 20,905
MWh - Fuel burned, 2025
- 71,328
MMBtu - Capacity factor, 2025
- 29.8
% - Heat rate, 2025
- Not stated
| Year | Net generation (MWh) | Fuel burned (MMBtu) | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|---|
| 2026 (8 of 12 months) | 14,210 | 48,487 | — | — |
| 2025 | 20,905 | 71,328 | 29.8% | — |
| 2024 | 29,383 | 100,254 | 41.8% | — |
| 2023 | 35,347 | 120,604 | 50.4% | — |
| 2022 | 25,209 | 86,013 | 36.0% | — |
| 2021 | 37,753 | 333,886 | 53.9% | — |
| 2020 | 24,440 | 214,266 | 34.8% | — |
| 2019 | 32,496 | 289,382 | 46.4% | — |
| 2018 | 38,791 | 353,155 | 55.4% | — |
| 2017 | 20,810 | 191,720 | 29.7% | — |
| 2016 | 14,505 | 133,909 | 20.6% | — |
| 2015 | 22,722 | 211,751 | 32.4% | — |
| 2014 | 32,155 | 305,797 | 45.9% | — |
| 2013 | 33,291 | 317,629 | 47.5% | — |
| 2012 | 23,588 | 224,462 | 33.6% | — |
| 2011 | 49,561 | 481,534 | 70.7% | — |
| 2010 | 30,264 | 295,259 | 43.2% | — |
| 2009 | 39,198 | 382,573 | 55.9% | — |
| 2008 | 43,128 | 424,986 | 61.4% | — |
| 2007 | 26,245 | 259,406 | 37.5% | — |
| 2006 | 42,500 | 421,557 | 60.6% | — |
| 2005 | 37,905 | 379,012 | 54.1% | — |
| 2004 | 32,966 | 330,385 | 46.9% | — |
| 2003 | 42,831 | 438,632 | 61.1% | — |
| 2002 | 18,363 | 186,807 | 26.2% | — |
| 2001 (11 of 12 months) | 24,238 | 250,451 | — | — |
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.