Holtwood
Hydro power plant · Lancaster County, Pennsylvania
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- BIF III Holtwood LLC
- County
- Lancaster County
- Generating units
- 14
- Share of state capacity
- 0.47%
- Rank among hydro plants in Pennsylvania
- #4 of 19
- EIA plant code
- 3145
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| HW18 | Conventional Hydroelectric | 66 MW | 65 MW | 2013 | Operating |
| HW19 | Conventional Hydroelectric | 66 MW | 65 MW | 2013 | Operating |
| HW3 | Conventional Hydroelectric | 14 MW | 13 MW | 1911 | Operating |
| HW9 | Conventional Hydroelectric | 13 MW | 13 MW | 1914 | Operating |
| HW10 | Conventional Hydroelectric | 12 MW | 13 MW | 1924 | Operating |
| HW8 | Conventional Hydroelectric | 11 MW | 11 MW | 1914 | Operating |
| HW1 | Conventional Hydroelectric | 10 MW | 10 MW | 1910 | Operating |
| HW2 | Conventional Hydroelectric | 10 MW | 12 MW | 1911 | Operating |
| HW4 | Conventional Hydroelectric | 10 MW | 11 MW | 1911 | Operating |
| HW5 | Conventional Hydroelectric | 10 MW | 12 MW | 1911 | Operating |
| HW6 | Conventional Hydroelectric | 10 MW | 13 MW | 1911 | Operating |
| HW7 | Conventional Hydroelectric | 10 MW | 10 MW | 1913 | Operating |
| HW11 | Conventional Hydroelectric | 1.4 MW | 1.2 MW | 2011 | Operating |
| HW13 | Conventional Hydroelectric | 1.4 MW | 1.2 MW | 2011 | Operating |
Nameplate is the maximum rated output; summer capacity is what the unit can reliably deliver on a hot day, which is typically lower.
Similarly sized plants in Pennsylvania
| Shell Chemical Appalachia LLC | Natural gas | 310 MW |
| Handsome Lake Energy LLC | Natural gas | 295 MW |
| Portland (PA) | Other | 194 MW |
| Grays Ferry Cogeneration | Natural gas | 193 MW |
About this data
From EIA’s inventory of operable generators, June 2026 release. Capacity is nameplate — the maximum rated output of the equipment, not what the plant actually generates over a year, which depends on how often it runs. A 247 MW solar plant and a 247 MW nuclear plant have the same entry here and produce very different amounts of electricity.
“In service since” is the earliest in-service date among the units still listed, so a site rebuilt around newer equipment can read as younger than the site itself. All Pennsylvania power plants · What Pennsylvania actually generates