FLORENCE MILL
OperatingBiomass power plant
- Capacity
- 108 MW
- Primary fuel
- Biomass
- County
- Florence County
- Operator
- ROCKTENN-FLORENCE
- Status
- Operating
- Commissioned
- 1963
- EIA plant ID
- 50806
- Generators
- 3
- Technology
- Wood/Wood Waste Biomass
- Net generation (2024)
- 334 GWh
- Capacity factor (2024, EIA nameplate)
- 37%
- Data vintage
- EIA-860 2024 final; EIA-923 2022-2024 final
- Coordinates
- 34.1533, -79.5584
FLORENCE MILL, a 108 MW Biomass power plant in Florence County, South Carolina. Operated by ROCKTENN-FLORENCE, commissioned 1963.
How FLORENCE MILL compares
With 108 MW of capacity, FLORENCE MILL ranks 30th among the 83 operating power plants Bywatts maps in South Carolina and 2nd of the 6 operating Biomass plants in the state. It accounts for about 32% of South Carolina's operating Biomass capacity and 0.5% of all operating capacity in the state. Nationally it is the 14th-largest of the 350 operating Biomass plants in the database. Commissioned in 1963, it is older than 70% of the 82 operating South Carolina plants with a recorded commissioning year.
EIA-860 lists 3 generators at the site with 104 MW of nameplate capacity, all wood/wood waste biomass technology. Net generation was 334 GWh in 2024 (a 37% capacity factor), down 19% from 2022. Its generators came online between 1963 and 1987.
Grid neighborhood
The closest transmission line found within 10 miles is a 115 kV line owned by PROGRESS ENERGY CAROLINAS INC, under 0.1 miles away.
Computed by Bywatts from HIFLD power plant and transmission line records and EIA-860/923 survey data; distances are straight-line. Sources and methodology
Weather peril exposure
FLORENCE MILL is a 108 MW biomass power plant in Florence County, SC, operated by ROCKTENN-FLORENCE, commissioned in 1963. Florence County carries high modeled catastrophe exposure in the FEMA National Risk Index, scoring 4.0 of 5 at the 75th national percentile. Hurricane is the leading peril, rated Relatively High by FEMA at the 92nd percentile.
The Bywatts loss layer is calibrated to solar PV hardware, so it is not applied to a biomass plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.
Florence County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Hurricane | Relatively High | 92nd | 4.7 of 5 | 0.26 |
| Earthquake | Relatively Moderate | 86th | 4.4 of 5 | <0.01 |
| Ice storm | Relatively High | 72nd | 3.9 of 5 | 0.79 |
| Hail | Relatively Moderate | 67th | 3.7 of 5 | 3.3 |
| Wildfire | Relatively Low | 66th | 3.6 of 5 | <0.01 |
| Tornado | Relatively High | 59th | 3.4 of 5 | 0.45 |
| Lightning | Relatively High | 57th | 3.3 of 5 | 58.2 |
| Heat wave | Relatively Moderate | 42nd | 2.7 of 5 | 8.9 |
| Strong wind | Relatively Moderate | 18th | 1.7 of 5 | 4.1 |
| Riverine flooding | Relatively Moderate | 17th | 1.7 of 5 | 0.79 |
| Winter weather | Relatively Moderate | 9th | 1.4 of 5 | 1.6 |
Perils not assessed in Florence 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 "No Rating" for this county |
Model hail, wind and flood exposure for Florence 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.