Spillway
Hydro power plant in Berkeley County, South Carolina. 2 MW of nameplate capacity across 1 generator, operated by South Carolina Public Service Authority.
Also known as EIA plant 3321
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Key facts
- Capacity
- 2 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- August 1950First generator online
- Operator
- South Carolina Public Service AuthorityEIA operator ID 17543
- Grid
- SCBalancing authority SC
- Price nodes
- None linkedNo verified ISO node
- Location
- Berkeley County, SC33.4538, −80.1640
- EIA plant ID
- 3321EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Spillway produces
Free · EIA-923Net generation, 2025
4.82 GWh
4,824 MWh, final
Capacity factor, 2025
27.5%
2024: 20.9%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
3.7–16.6
GWh a year. Low 2024, high 2017
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | 15,361 | Not reported | 12 of 12 |
| 2001 | 15,056 | Not reported | 12 of 12 |
| 2002 | 15,154 | Not reported | 12 of 12 |
| 2003 | 14,436 | Not reported | 12 of 12 |
| 2004 | 15,418 | Not reported | 12 of 12 |
| 2005 | 16,066 | Not reported | 12 of 12 |
| 2006 | 17,011 | Not reported | 12 of 12 |
| 2007 | 14,378 | Not reported | 12 of 12 |
| 2008 | 12,449 | Not reported | 12 of 12 |
| 2009 | 13,664 | Not reported | 12 of 12 |
| 2010 | 14,801 | 84.5% | 12 of 12 |
| 2011 | 15,929 | 90.9% | 12 of 12 |
| 2012 | 15,449 | 87.9% | 12 of 12 |
| 2013 | 15,530 | 88.6% | 12 of 12 |
| 2014 | 15,819 | 90.3% | 12 of 12 |
| 2015 | 15,136 | 86.4% | 12 of 12 |
| 2016 | 15,709 | 89.4% | 12 of 12 |
| 2017 | 16,626 | 94.9% | 12 of 12 |
| 2018 | 14,748 | 84.2% | 12 of 12 |
| 2019 | 6,406 | 36.6% | 12 of 12 |
| 2020 | 7,287 | 41.5% | 12 of 12 |
| 2021 | 13,227 | 75.5% | 12 of 12 |
| 2022 | 15,373 | 87.7% | 12 of 12 |
| 2023 | 11,785 | 67.3% | 12 of 12 |
| 2024 | 3,673 | 20.9% | 12 of 12 |
| 2025 | 4,824 | 27.5% | 12 of 12 |
| 2026 (provisional, partial year) | Not reported | Not reported | 0 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free accountNo verified ISO price node is linked to this plant, or its price history could not load.
Emissions
Free · EPA CAMPDNo EPA emissions units are linked to this plant.
Water use
Free · EIA-923 cooling, USGSNo EIA cooling-water record for this plant in 2024. Plants without steam cooling, such as wind, solar and batteries, do not report cooling water.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| 1 | Conventional Hydroelectric | 2.0 | August 1950 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists South Carolina Public Service Authority as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
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Power plants near Spillway
More plants operated by South Carolina Public Service Authority
Questions about Spillway
How much power does Spillway produce?
Spillway reported 4,824 MWh (4.82 GWh) of net generation in 2025, a 27.5% capacity factor on 2 MW of nameplate capacity.
Where is Spillway?
Spillway is in Berkeley County, South Carolina, at 33.4538, −80.1640. It is in the South Carolina Public Service Authority balancing area (SC).
Who operates Spillway?
EIA-860M for August 2026 lists South Carolina Public Service Authority as the operator (EIA operator ID 17543). The operator is not always the owner.
When did Spillway start operating?
Its first generator began operating in August 1950, according to EIA-860M.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page