Spring House
Montgomery County, Pennsylvania · EIA plant ID 59056 · Operator: Janssen Pharmaceutical Co
Nameplate4MWSummer 4 MW
Generators1in service
Net generation19GWh12 mo to Dec 2025
Capacity factor56%gas/coal/oil units, summer MW
Heat rate8,765Btu/kWhfossil units, electric fuel, HHV
First online2013Runs as intermediate
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) |
|---|---|---|---|
| 2013 | 17.9 | 71.5% | 9,470 |
| 2014 | 23.5 | 70.6% | 8,602 |
| 2015 | 24.2 | 72.7% | 8,601 |
| 2016 | 23.4 | 70.2% | 8,546 |
| 2017 | 21.8 | 65.5% | 8,906 |
| 2018 | 17.3 | 52.0% | 9,778 |
| 2019 | 20.1 | 60.3% | 8,945 |
| 2020 | 22.1 | 66.2% | 13,507 |
| 2021 | 23.4 | 70.2% | 13,081 |
| 2022 | 15.4 | 46.2% | 8,733 |
| 2023 | 8.1 | 24.3% | 8,435 |
| 2024 | 12.4 | 37.2% | 8,931 |
| 2025 | 18.5 | 55.6% | 8,765 |
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 |
|---|---|---|---|---|---|---|---|---|
| GEN 1 | Natural Gas Internal Combustion Engine | IC | 3.8 | 3.8 | Apr 2013 | Operating | — | coming soon |
Owner / operator
Operator: Janssen Pharmaceutical Co. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Janssen Pharmaceutical Co | 100.0% | 4 MW |
Nearby plants
Within 80 km.
| Merck - Upper Gwynedd Solar Array | 2 MW | 5.4 km |
| 500 Virginia Solar | 1 MW | 6.1 km |
| West Point (PA) | 91 MW | 6.7 km |
| North Wales Diesel | retired | 7.3 km |
| Whitemarsh Central Utility Plant | retired | 9.6 km |
| Hatfield PA BTM | 3 MW | 11.2 km |