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847.8 MW Hydro operating in Floyd, GA — Southern Company Services, Inc. - Trans
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
| 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
−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.
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
This plant's balancing authority participates in the Southeast Energy Exchange Market (SEEM). SEEM is a bilateral exchange — no public nodal pricing.
Last updated 2026-04-09
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