A L Pierce
New Haven County, Connecticut · EIA plant ID 6635 · Operator: MPH AL Pierce, LLC
Nameplate84MWSummer 74 MW
Generators1in service
Net generation0GWh12 mo to Aug 2026
Capacity factor0%gas/coal/oil units, summer MW
Heat rate—Btu/kWhfossil units, electric fuel, HHV
First online2007Runs as rarely runs
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), gas/coal/oil 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) |
|---|---|---|---|
| 2007 | 8.1 | 5.1% | 12,939 |
| 2008 | 4.8 | 0.8% | 12,818 |
| 2009 | 3.7 | 0.6% | 12,721 |
| 2010 | 5.1 | 0.8% | 12,859 |
| 2011 | 4.8 | 0.8% | 12,199 |
| 2012 | 6.6 | 1.0% | 11,911 |
| 2013 | 9.1 | 1.3% | 13,813 |
| 2014 | 13.2 | 1.9% | 11,334 |
| 2015 | 2.3 | 0.4% | 12,497 |
| 2016 | 4 | 0.6% | 12,652 |
| 2017 | 4.3 | 0.7% | 11,927 |
| 2018 | 3.5 | 0.5% | 12,291 |
| 2019 | 2 | 0.3% | 14,023 |
| 2020 | 1.8 | 0.3% | 12,593 |
| 2021 | 5.1 | 0.8% | 12,363 |
| 2022 | 0.6 | 0.1% | 12,647 |
| 2023 | 0 | 0.0% | — |
| 2024 | 0 | 0.0% | — |
| 2025 | 0 | 0.0% | — |
Fuel capability
Gas-fired turbines (CT/GT/CA/CS) that can also burn liquid fuel. EIA-860 Schedule 3 for capability, EIA-923 for actual burn.
StatusListed in EIA-860, no liquid burn in 36 months
Liquid fuel burned · 36 mo0 MMBtu
Last month with liquid burn—
Switch while operatingYes
Net summer MW on gas74
Net summer MW on oil74
Time gas → oilup to 1 h (EIA 1H)
Time oil → gasup to 1 h (EIA 1H)
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 |
|---|---|---|---|---|---|---|---|---|
| 4 | Natural Gas Fired Combustion Turbine | GT | 84 | 74.1 | Oct 2007 | Operating | — | coming soon |
| 1 | Petroleum Liquids | ST | 7.5 | 7.5 | Aug 1953 | Retired Dec 1998 | — | coming soon |
| 2 | Petroleum Liquids | ST | 7.5 | 7.3 | Aug 1953 | Retired Jul 2000 | — | coming soon |
| 3 | Petroleum Liquids | ST | 7.5 | 7.3 | Aug 1953 | Retired Jul 2000 | — | coming soon |
Owner / operator
Operator: MPH AL Pierce, LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| MPH AL Pierce, LLC | 100.0% | 84 MW |
Nearby plants
Within 80 km.
| Wallingford Energy | 350 MW | 0.1 km |
| Wallingford Solar | 16 MW | 0.7 km |
| Amazon BDL3 Solar Project | 1 MW | 1.3 km |
| North Haven Solar One | 2 MW | 7.9 km |
| CTGB Maloney and Webster | 2 MW | 9.3 km |
| CTGB Manson Youth | 2 MW | 9.3 km |