Orrtanna
Adams County, Pennsylvania · EIA plant ID 3112 · Operator: Orrtanna Power, LLC
Nameplate27MWSummer 20 MW
Generators1in service
Net generation0GWh12 mo to Dec 2025
Capacity factor0%gas/coal/oil units, summer MW
Heat rate24,005Btu/kWhfossil units, electric fuel, HHV
First online1971Runs as rarely runs
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) |
|---|---|---|---|
| 2001 | 2.4 | 1.4% | 14,543 |
| 2002 | 3.5 | 2.0% | 15,162 |
| 2003 | 4.1 | 2.4% | 14,429 |
| 2004 | 1.6 | 0.9% | 15,525 |
| 2005 | 2.4 | 1.4% | 14,926 |
| 2006 | 1.7 | 1.0% | 15,308 |
| 2007 | 4 | 2.3% | 16,561 |
| 2008 | 0.3 | 0.2% | — |
| 2009 | -0.2 | -0.1% | — |
| 2010 | 1 | 0.6% | 20,031 |
| 2011 | 0.8 | 0.4% | 19,884 |
| 2012 | 0.3 | 0.2% | — |
| 2013 | 0.3 | 0.2% | — |
| 2014 | 1.7 | 1.1% | 15,822 |
| 2015 | -0 | -0.0% | — |
| 2016 | 0.6 | 0.4% | 21,546 |
| 2017 | 0.3 | 0.2% | 21,515 |
| 2018 | 0.2 | 0.1% | 26,506 |
| 2019 | -0.1 | -0.1% | — |
| 2020 | 0.1 | 0.1% | — |
| 2021 | 0 | 0.0% | — |
| 2022 | 0.8 | 0.5% | 18,880 |
| 2023 | -0.1 | -0.1% | — |
| 2024 | -0.1 | -0.1% | — |
| 2025 | 0.4 | 0.2% | 24,005 |
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 |
|---|---|---|---|---|---|---|---|---|
| 1 | Petroleum Liquids | GT | 27 | 20.2 | May 1971 | Operating | — | coming soon |
Owner / operator
Operator: Orrtanna Power, LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Orrtanna Power, LLC | 100.0% | 27 MW |
Nearby plants
Within 80 km.
| FR_Williamsport LLC | 20 MW | 10.7 km |
| Adams Solar LLC PA | 80 MW | 13.7 km |
| Hunterstown Power Plant | 898 MW | 16 km |
| Hunterstown | 60 MW | 16.1 km |
| Emmitsburg Solar Arrays | 2 MW | 17 km |
| Mount Saint Mary's | 14 MW | 18.8 km |