- Combustion
- Wind & solar
- In development
- Under construction
- Operating
- 10 · 100 · 1,000 MW
Map
- Combustion
- Wind & solar
- In development
- Under construction
- Operating
Winyah: location and 2 exact-grade projects within 15 mi. Basemap: Protomaps, © OpenStreetMap contributors, ODbL.
Winyah
Power plant · Coal
Key facts
Power plant · Coalran 38% of 2025 Retiring- Capacity
- Capacity: sourceEIA-860M · Open licenseMW
- Commissioned
- 1975
- Net generation, 2025
- 4,216,009 MWh
- Grid
- 230 kV, 115 kV to South Carolina Public Service Authority (SC)
- Location
- Georgetown County, South Carolina
- Operated by
- South Carolina Public Service AuthoritySourceEIA-860M Preliminary Monthly Electric Generator Inventory
Output
- Coal
- Oil
Details
Who’s behind it
- Owner
- South Carolina Public Service AuthoritySource100.0%, EPA Greenhouse Gas Reporting Program — facility register with parent-company shares (Envirofacts pub_dim_facility; FLIGHT), as of Dec 31, 2023
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- Technology
- Coal source: “Conventional Steam Coal”
- Age
- 51 years since 1975
- Heat rate
- 10,913 Btu/kWh 2025
All 7 attributes from EIA-860M Preliminary Monthly Electric Generator Inventory
| Attribute | Value |
|---|---|
| Gem |
|
| EPA greenhouse gas reporting (GHGRP) |
|
| Fuel burned (MMBtu), 2025 | 46,011,027 |
| Capacity factor, 2025 | 0.377 |
| Heat rate (Btu/kWh), 2025 | 10,913.4 |
| Net generation (MWh), 2025 | 4,216,009.0 |
| Balancing authority code | SC |
Retirement
EIA-860M September 2026StatusAt least half of the plant's in-service nameplate capacity is scheduled to retire, on dates its owner has reported to EIA. As of EIA-860M for September 2026.- Next scheduled retirement
- December 2030
- Capacity scheduled to retire
- 1,275.8 MW
- Generators scheduled to retire
- 4
- Share of in-service capacity scheduled
- 100%
- Capacity still in service
- 1,275.8 MW
| Generator | Technology | Nameplate | State | Date |
|---|---|---|---|---|
| 1 | Conventional Steam Coal | 330.8 MW | Scheduled to retire | December 2030 |
| 2 | Conventional Steam Coal | 315 MW | Scheduled to retire | December 2030 |
| 3 | Conventional Steam Coal | 315 MW | Scheduled to retire | December 2030 |
| 4 | Conventional Steam Coal | 315 MW | Scheduled to retire | December 2030 |
Grid
EIA-860 2025Grid fieldsAs the plant reported them to EIA-860 for 2025 (Schedule 2).- Grid voltage at the plant
- 230 kV, 115 kV
- Transmission or distribution system owner
- South Carolina Public Service Authority
- Balancing authority
- South Carolina Public Service Authority
- NERC region
- SERC
Can the connection be reused?
A plant that retires usually leaves its substation, transmission connection and interconnection agreement behind, and those may be reusable by a new project at the same site. FERC Order No. 845 lets an interconnection customer use surplus interconnection service at an existing site, and some transmission providers' tariffs let a replacement resource take over a retiring unit's interconnection service, usually within a set time after the retirement. Whether any such right still exists here, who holds it and on what terms depends on the owner, the transmission provider and timing; this page does not establish any of that.
Timeline
- Stated Units 1, 2, 3, 4 scheduled to retire, 1,275.8 MW · EIA-860M
- In service · EIA-860M
Sources
5 sourcesSources EIA-860M · GEM · EIA · EIA-860M Preliminary Monthly Electric Generator Inventory · EPA Greenhouse Gas Reporting Program — facility register with parent-company shares (Envirofacts pub_dim_facility; FLIGHT)
Sources
- EIA-860M
- GEMGlobal Integrated Power Tracker, Global Energy Monitor, September 2026 release (https://globalenergymonitor.org/projects/global-integrated-power-tracker), CC BY 4.0. Modified by Inframation: TransitionZero-sourced rows removed; statuses and technologies mapped to Inframation's vocabulary; figures aggregated. Copyright © Global Energy Monitor. Global Integrated Power Tracker, September 2026 release. Distributed under a Creative Commons Attribution 4.0 International License.
- EIASource: U.S. Energy Information Administration, Electricity bulk data (Form EIA-923 monthly plant series)
- EIA-860M Preliminary Monthly Electric Generator Inventory
- EPA Greenhouse Gas Reporting Program — facility register with parent-company shares (Envirofacts pub_dim_facility; FLIGHT)
Around this plant
Nearby
within 15 mi| Project | Kind | Away | MW |
|---|---|---|---|
| Winyah Announced | Oil | 0.0 mi | 114 |
| SR Georgetown Under construction | Solar | 9.0 mi | 50 |
Sources EIA-860M