12 MW Hydro operating in Cherokee, SC — Duke Energy Carolinas
12 MW
Nameplate Capacity
4
Generators
units
Conventional Hydroelectric
Technology
1910
Operating Since
Coordinates
35.0318, -81.4932
County
Cherokee, SC
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Duke Energy Carolinas, LLC | Duke Energy Carolinas | — |
| Owner(s) | Duke Energy Carolinas, LLC | Duke Energy | — |
| Status | Operating | — | — |
The 99 Islands hydroelectric plant is located in Cherokee County, South Carolina. The plant, owned and operated by Duke Energy Carolinas, LLC, has a total capacity of 12 MW across four generators. It began operating in 1910, utilizing conventional hydroelectric technology and water as its primary fuel source. The plant operates within the Duke Energy Carolinas balancing authority and the SERC NERC region.
In the most recent year with available data, 99 Islands generated 36,578 MWh, achieving a capacity factor of 34.3%. The plant has a power purchase agreement (PPA) price of $25 per MWh. 99 Islands is ranked as the 16th largest hydroelectric plant in South Carolina out of 33, and nationally it is ranked 613 out of 1464 plants. Financial data for the plant is available from FERC and FERC EQRs.
Generated from EIA, GEM, and public data sources
NERC Region
SERC
Balancing Authority
Duke Energy Carolinas
Grid Voltage
44 kV
Regulatory Status
RE
Entity Type
Investor-Owned Utility
Sector
Electric Utility
0 MWh
Latest Month
36.6K MWh
Annual Generation
34.3%
Capacity Factor
$25.0/MWh
PPA Price
Duke Energy Carolinas, LLC
Contract Seller
Cumulative Installed Cost
Per-Unit Cost Trends
This plant is outside organized wholesale electricity markets (ISOs/RTOs). Nodal pricing data is not available.
Duke Energy Progress, LLC, Duke Energy Carolinas, LLC; Notice of Application of Transfer of License and Soliciting Comments, Motions To Intervene, and Protests
Duke Energy Progress, LLC; Duke Energy Carolinas, LLC; Notice of Application of Transfer of License and Soliciting Comments, Motions To Intervene, and Protests
Duke Energy Progress, LLC; Duke Energy Carolinas, LLC; Notice of Application of Transfer of License and Soliciting Comments, Motions To Intervene, and Protests
Duke Energy Progress, LLC; Duke Energy Carolinas, LLC; Notice of Application of Transfer of License and Soliciting Comments, Motions To Intervene, and Protests
Last updated 2026-03-25
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