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847.8 MW Hydro operating in Floyd, GA
847.8 MW
Nameplate Capacity
3
Generators
units
Hydroelectric Pumped Storage
Technology
1995
Operating Since
Coordinates
34.3555, -85.3039
County
Floyd, GA
Nearby Plants
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| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Oglethorpe Power Corporation | Oglethorpe Power [75%]; Georgia Power [25%] | — |
| Owner(s) | Georgia Power Co, Oglethorpe Power Corporation | Southern | — |
| Status | Operating | operating | — |
The Rocky Mountain Hydroelectric Plant is a pumped-storage power plant located 10 miles (16 km) northwest of Rome in the U.S. state of Georgia. It is named after Rock Mountain on top of which the plant's upper reservoir is located. Construction on the plant began in 1977 and it was commissioned in 1995. After upgrades were completed in 2011, the plant has an installed capacity of 1,095 megawatts (1,468,000 hp). It is owned by both Oglethorpe Power and Georgia Power which have 75 percent and 25 percent stakes, respectively.
Read more on WikipediaThe Rocky Mountain Hydroelectric Plant is a pumped-storage hydroelectric facility located in Floyd County, Georgia. With a total capacity of 847.8 MW, it is the largest of seven hydroelectric plants in Georgia and ranks 28th out of 194 nationally. The plant began operating in 1995 and utilizes water as its primary fuel source. It has three generators.
The plant is owned by Southern Company and operated by Oglethorpe Power Corporation. It operates within the Southern Company Services, Inc. - Trans balancing authority and the SERC NERC region. Financial data indicates an installed cost of $828.77 per kW, according to FERC filings.
Generated from EIA, GEM, and public data sources
Grid Region
Southeast
Market
SEEM Participant
NERC Region
SERC — SERC Reliability Corporation
Balancing Authority
Southern Company Services, Inc. - Trans (SOCO)
Grid Voltage
230.0 kV
Regulatory Status
RE — Regulated
Entity Type
Cooperative
Sector
Electric Utility
Monthly net generation as reported to EIA-923 — useful for historical context. Confidence varies sharply by fuel type; the band above and the “About this data” button explain the caveats specific to this plant and how InfraSure’s in-house model handles them.
−40.0K MWh
Net Charging
-452.6K MWh
Annual Net Energy
-6.1%
Capacity Factor
Positive values indicate net discharge (generation exceeds station load). Negative values indicate net charging. Pure battery storage plants are typically net negative due to round-trip efficiency losses.
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Georgia Power Company · Data from 2015–2019
$654/kW
Installed Cost
$34.0/MWh
Operating Cost
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
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This plant's balancing authority participates in the Southeast Energy Exchange Market (SEEM). SEEM is a bilateral exchange — no public nodal pricing.
No wholesale contracts disclosed in FERC EQR for this plant.
FERC EQR captures bilateral wholesale energy + capacity contracts ≥$1M/yr filed quarterly by jurisdictional sellers — covers renewable PPAs, thermal energy sales agreements, capacity contracts, and tolling agreements alike. Many plants don't appear: regulated-utility output flows to ratepayers via cost-of-service rather than bilateral contracts; small projects fall below the filing threshold; tax-equity-financed renewables route offtake to investors not utilities; merchant plants sell into ISO clearing markets without bilateral contracts. News-extracted buyer facts (below) may surface contracts disclosed only through announcements.
Last updated 2026-05-31
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DOE closed a $26.5 billion loan package to two wholly owned subsidiaries of Southern Company (parent of co-owner Georgia Power) for 16 GW of new capacity including BESS; not plant-specific but involves co-owner's parent entity.
sourceOglethorpe Power Corporation's FERC application for the Rocky Mountain facility declared ready for environmental analysis; public comments, conditions, and prescriptions solicited.
source