Middlesex Generating Facility
Middlesex County, New Jersey · EIA plant ID 56119 · Operator: Middlesex Generating Company LLC
Nameplate23MWSummer 19 MW
Generators3in service
Net generation106GWh12 mo to Aug 2026
Capacity factor97%other units, summer MW
Heat rate—Btu/kWhfossil units, electric fuel, HHV
First online1961
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), other units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2003 | 125.5 | 174.7% | — |
| 2004 | 0 | 0.0% | — |
| 2005 | 95.7 | 133.2% | — |
| 2006 | 94.7 | 82.7% | 6,420 |
| 2007 | 0 | 0.0% | — |
| 2008 | 8.8 | 12.2% | — |
| 2009 | 112.7 | 106.3% | — |
| 2010 | 60.9 | 84.8% | — |
| 2011 | 100.9 | 93.3% | 11,373 |
| 2012 | 101.3 | 94.3% | 11,373 |
| 2013 | 91.7 | 97.3% | — |
| 2014 | 81.2 | 89.1% | — |
| 2015 | 91.1 | 90.8% | — |
| 2016 | 114 | 100.2% | — |
| 2017 | 102.8 | 94.6% | — |
| 2018 | 90.6 | 88.1% | — |
| 2019 | 71.5 | 79.0% | — |
| 2020 | 82.5 | 80.3% | — |
| 2021 | 87.8 | 78.5% | — |
| 2022 | 104.2 | 89.0% | — |
| 2023 | 99.4 | 85.4% | — |
| 2024 | 97.1 | 91.3% | — |
| 2025 | 107.8 | 94.8% | — |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| 100 | Landfill Gas | CT | 6 | 4.1 | Oct 2001 | Operating | — | coming soon |
| 200 | Landfill Gas | CT | 6 | 4.1 | Oct 2001 | Operating | — | coming soon |
| 300 | Landfill Gas | CA | 10.5 | 10.6 | Jan 1961 | Operating | — | coming soon |
Owner / operator
Operator: Middlesex Generating Company LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Middlesex Generating Company LLC | 100.0% | 23 MW |
Nearby plants
Within 80 km.
| Sabert Solar | 2 MW | 1.7 km |
| FedEx Woodbridge | 2 MW | 1.9 km |
| Wakefern Food Corp | 2 MW | 2.4 km |
| Woodbridge Energy Center | 773 MW | 2.8 km |
| Summit Associates | 2 MW | 3.4 km |
| Sayreville | 212 MW | 3.5 km |