- Clean firm
- Operating
- 10 · 100 · 1,000 MW
Map
- Clean firm
- Operating
Shepaug: location. Basemap: Protomaps, © OpenStreetMap contributors, ODbL.
Shepaug
Power plant · Hydro
Key facts
Power plant · Hydroran 29% of 2025 Operating- Capacity
- Capacity: sourceEIA-860M · Open licenseMW
- Commissioned
- 1955
- Net generation, 2025
- 93,324 MWh
- Grid
- 69 kV to Connecticut Light & Power Co (ISNE)
- Location
- New Haven County, Connecticut
- Operated by
- FirstLight Power Resources Services LLC
Operations
- Net generation, 2025
- 93,324
MWh - Fuel burned, 2025
- 318,423
MMBtu - Capacity factor, 2025
- 28.6
% - Heat rate, 2025
- Not stated
| Year | Net generation (MWh) | Fuel burned (MMBtu) | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|---|
| 2025 | 93,324 | 318,423 | 28.6% | — |
| 2024 | 116,629 | 397,939 | 35.7% | — |
| 2023 | 163,147 | 556,656 | 50.1% | — |
| 2022 | 99,724 | 340,260 | 30.6% | — |
| 2021 | 148,291 | 1,311,486 | 45.5% | — |
| 2020 | 106,972 | 937,823 | 32.7% | — |
| 2019 | 143,101 | 1,274,315 | 43.9% | — |
| 2018 | 187,815 | 1,709,868 | 57.6% | — |
| 2017 | 103,513 | 953,666 | 31.8% | — |
| 2016 | 72,728 | 671,423 | 22.3% | — |
| 2015 | 96,232 | 896,788 | 29.5% | — |
| 2014 | 145,192 | 1,380,775 | 44.5% | — |
| 2013 | 126,939 | 1,211,124 | 39.0% | — |
| 2012 | 90,228 | 858,611 | 27.6% | — |
| 2011 | 184,256 | 1,790,232 | 56.5% | — |
| 2010 | 122,344 | 1,193,589 | 37.5% | — |
| 2009 | 148,435 | 1,448,727 | 45.6% | — |
| 2008 | 173,050 | 1,705,233 | 53.0% | — |
| 2007 | 111,246 | 1,099,554 | 34.1% | — |
| 2006 | 165,240 | 1,639,018 | 50.7% | — |
| 2005 | 148,308 | 1,482,932 | 45.5% | — |
| 2004 | 140,646 | 1,409,554 | 43.0% | — |
| 2003 | 175,616 | 1,798,483 | 53.9% | — |
| 2002 | 91,310 | 928,897 | 28.0% | — |
| 2001 | 73,399 | 758,432 | 22.5% | — |
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)