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22.5 MW Hydro operating in Stephens, GA — Southern Company Services, Inc. - Trans
22.5 MW
Nameplate Capacity
3
Generators
units
Conventional Hydroelectric
Technology
1925
Operating Since
Coordinates
34.6814, -83.3428
County
Stephens, GA
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Georgia Power Co | Georgia Power | — |
| Owner(s) | Georgia Power Co | Southern | — |
| Status | Operating | — | — |
Yonah is a hydroelectric power plant located in Stephens County, Georgia. The plant has a total capacity of 22.5 MW across three generators, and it began operating in 1925. The primary fuel source is water (WAT), and the plant utilizes conventional hydroelectric technology. The owner and operator is Georgia Power Co, a subsidiary of Southern Company. Yonah operates within the Southern Company Services, Inc. - Trans balancing authority and the SERC NERC region.
In the most recent year with available data, Yonah generated 42,159 MWh of electricity, achieving a capacity factor of 21.3%. The plant is ranked 16th out of 30 hydroelectric facilities in Georgia and 465th out of 1464 nationally. Financial data indicates an installed cost of $513 per kW.
Generated from EIA, GEM, and public data sources
Grid Region
Southeast
Market
SEEM Participant
NERC Region
SERC — SERC Reliability Corporation
Balancing Authority
2.4K MWh
Latest Month
42.2K MWh
Annual Generation
21.3%
Capacity Factor
Run-of-river hydro · Georgia Power Company · Data from 2015–2024
$679/kW
Installed Cost
$8.2/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 2026-03-26
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ask pi about YonahSouthern Company Services, Inc. - Trans (SOCO)
Grid Voltage
115.0 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility