PPL HOLTWOOD
OperatingHydro power plant
- Capacity
- 115 MW
- Primary fuel
- Hydro
- County
- Lancaster County
- Operator
- PPL HOLTWOOD LLC
- Status
- Operating
- Commissioned
- 1910
- EIA plant ID
- 3145
- Coordinates
- 39.8273, -76.3320
PPL HOLTWOOD, a 115 MW Hydro power plant in Lancaster County, Pennsylvania. Operated by PPL HOLTWOOD LLC, commissioned 1910.
How PPL HOLTWOOD compares
With 115 MW of capacity, PPL HOLTWOOD ranks 40th among the 170 operating power plants Bywatts maps in Pennsylvania and 4th of the 18 operating Hydro plants in the state. It accounts for about 5.0% of Pennsylvania's operating Hydro capacity and 0.3% of all operating capacity in the state. Nationally it is the 154th-largest of the 1,243 operating Hydro plants in the database. Commissioned in 1910, it is older than 98% of the 168 operating Pennsylvania plants with a recorded commissioning year. It shares Lancaster County with 10 other operating plants, including MUDDY RUN and SAFE HARBOR.
Grid neighborhood
The nearest named substation is PEACH BOTTOM (500 kV), about 5.4 miles away; the closest transmission line found within 10 miles is a 115 kV line, about 0.2 miles away. Another 15 operating power plants totaling 5,823 MW sit within 25 miles; the largest is PEACH BOTTOM (2,319 MW, Nuclear). Within 50 miles are 3 mapped data centers; the nearest is USNAMES-NET in Wilmington, about 38.0 miles away.
Computed by Bywatts from HIFLD power plant, substation and transmission line records, EIA-860 retirement records and PeeringDB data center locations; distances are straight-line. Sources and methodology
Weather peril exposure
PPL HOLTWOOD is a 115 MW hydro power plant in Lancaster County, PA, operated by PPL HOLTWOOD LLC, commissioned in 1910. Lancaster County carries low modeled catastrophe exposure in the FEMA National Risk Index, scoring 1.5 of 5 at the 12th national percentile. Hurricane is the leading peril, rated Relatively High by FEMA at the 81st percentile.
The Bywatts loss layer is calibrated to solar PV hardware, so it is not applied to a hydro plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.
Lancaster County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Hurricane | Relatively High | 81st | 4.2 of 5 | 0.08 |
| Earthquake | Relatively Moderate | 72nd | 3.9 of 5 | <0.01 |
| Winter weather | Very High | 60th | 3.4 of 5 | 12.3 |
| Riverine flooding | Relatively High | 56th | 3.3 of 5 | 3.4 |
| Ice storm | Relatively Moderate | 27th | 2.1 of 5 | 1.2 |
| Tornado | Relatively Moderate | 23rd | 1.9 of 5 | 0.59 |
| Strong wind | Relatively High | 22nd | 1.9 of 5 | 6.7 |
| Lightning | Relatively High | 13th | 1.5 of 5 | 36.0 |
| Hail | Relatively Moderate | 12th | 1.5 of 5 | 2.7 |
| Heat wave | Relatively Moderate | 7th | 1.3 of 5 | 5.3 |
| Wildfire | Very Low | 1st | 1.0 of 5 | <0.01 |
Perils not assessed in Lancaster County
These perils carry no usable National Risk Index figure for this county, so they are excluded from the scoring rather than scored zero. A zero would claim the peril was assessed and found benign.
| Peril | Why it is not scored |
|---|---|
| Coastal flooding | FEMA rating is "Not Applicable" for this county |
Model hail, wind and flood exposure for Lancaster County in the weather risk calculator
Ratings are the FEMA National Risk Index county hazard ratings; the peril score is a Bywatts transform of the FEMA national percentile. Full data sources and the solar vulnerability methodology are in the weather risk calculator.
Modeled estimate for screening and negotiation. Built from FEMA National Risk Index county hazard data and a solar vulnerability layer documented above. Not a quote, a binder, or actuarial advice, and not a substitute for a carrier's own model. Hazard data: FEMA National Risk Index December 2025, synced 2026-07-24. Resolution is county level, not site level.