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22.5 MW Hydro operating in Stephens, GA
22.5 MW
Nameplate Capacity
3
Generators
units
Conventional Hydroelectric
Technology
1925
Operating Since
Coordinates
34.6814, -83.3428
County
Stephens, GA
Nearby Plants
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| 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
Southern Company Services, Inc. - Trans (SOCO)
Grid Voltage
115.0 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
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.
2.4K MWh
Latest Month
42.2K MWh
Annual Generation
21.3%
Capacity Factor
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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
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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.
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