Rocky Mountain Hydroelectric Plant
Pumped storage power plant in Floyd County, Georgia. 847.8 MW of nameplate capacity across 3 generators, operated by Oglethorpe Power Corporation.
Also known as EIA plant 6189
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 847.8 MWNameplate
- Generators
- 3 operatingEIA-860M, August 2026
- Operating since
- June 1995First generator online
- Operator
- Oglethorpe Power CorporationEIA operator ID 13994
- Grid
- SOCOBalancing authority SOCO
- Price nodes
- None linkedNo verified ISO node
- Location
- Floyd County, GA34.3555, −85.3039
- EIA plant ID
- 6189EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Rocky Mountain Hydroelectric Plant produces
Free · EIA-923Net generation, 2025
−453 GWh
−452,645 MWh, final
Capacity factor, 2025
Not reported
2024: Not reported
January to July 2026
−249 GWh
Provisional
Range, 2015 to 2025
−535.0–−390.3
GWh a year. Low 2017, high 2021
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | −518,844 | Not reported | 12 of 12 |
| 2001 | −506,072 | Not reported | 12 of 12 |
| 2002 | −497,425 | Not reported | 12 of 12 |
| 2003 | −520,735 | Not reported | 12 of 12 |
| 2004 | −495,820 | Not reported | 12 of 12 |
| 2005 | −477,761 | Not reported | 12 of 12 |
| 2006 | −478,245 | Not reported | 12 of 12 |
| 2007 | −303,052 | Not reported | 12 of 12 |
| 2008 | −412,581 | Not reported | 12 of 12 |
| 2009 | −440,390 | Not reported | 12 of 12 |
| 2010 | −452,322 | Not reported | 12 of 12 |
| 2011 | −459,165 | Not reported | 12 of 12 |
| 2012 | −440,700 | Not reported | 12 of 12 |
| 2013 | −468,860 | Not reported | 12 of 12 |
| 2014 | −472,543 | Not reported | 12 of 12 |
| 2015 | −489,613 | Not reported | 12 of 12 |
| 2016 | −489,099 | Not reported | 12 of 12 |
| 2017 | −534,990 | Not reported | 12 of 12 |
| 2018 | −443,643 | Not reported | 12 of 12 |
| 2019 | −531,117 | Not reported | 12 of 12 |
| 2020 | −500,222 | Not reported | 12 of 12 |
| 2021 | −390,330 | Not reported | 12 of 12 |
| 2022 | −423,019 | Not reported | 12 of 12 |
| 2023 | −432,697 | Not reported | 12 of 12 |
| 2024 | −425,949 | Not reported | 12 of 12 |
| 2025 | −452,645 | Not reported | 12 of 12 |
| 2026 (provisional, partial year) | −248,894 | Not reported | 7 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 | Hydroelectric Pumped Storage | 282.6 | July 1995 |
| 2 | Hydroelectric Pumped Storage | 282.6 | June 1995 |
| 3 | Hydroelectric Pumped Storage | 282.6 | June 1995 |
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 Oglethorpe Power Corporation 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 Rocky Mountain Hydroelectric Plant
More plants operated by Oglethorpe Power Corporation
Questions about Rocky Mountain Hydroelectric Plant
How much power does Rocky Mountain Hydroelectric Plant produce?
Rocky Mountain Hydroelectric Plant reported −452,645 MWh (−453 GWh) of net generation in 2025. From January to July 2026 it reported −249 GWh, which is provisional.
Where is Rocky Mountain Hydroelectric Plant?
Rocky Mountain Hydroelectric Plant is in Floyd County, Georgia, at 34.3555, −85.3039. It is in the Southern Company Services, Inc. - Trans balancing area (SOCO).
Who operates Rocky Mountain Hydroelectric Plant?
EIA-860M for August 2026 lists Oglethorpe Power Corporation as the operator (EIA operator ID 13994). The operator is not always the owner.
When did Rocky Mountain Hydroelectric Plant start operating?
Its first generator began operating in June 1995, 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