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1199.8 MW Nuclear operating in St Charles, LA
1,199.8 MW
Nameplate Capacity
1
Generators
unit
Nuclear
Technology
1985
Operating Since
Coordinates
29.9953, -90.4716
County
St Charles, LA
Nearby Plants
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| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Entergy Louisiana LLC | Entergy Nuclear Operations | Entergy |
| Owner(s) | Entergy Louisiana LLC | Entergy | — |
| Status | Operating | operating | — |
The Waterford Steam Electric Station, Unit 3, also known as Waterford 3, is a nuclear power plant located on a 3,000-acre (1,200 ha) plot in Killona, Louisiana, in St. Charles Parish, about 25 miles (40 km) west of New Orleans.
Read more on WikipediaWaterford 3 is a nuclear power plant located in St Charles County, Louisiana. The plant has a total capacity of 1199.8 MW and began operating in 1985. It is owned by Entergy and operated by Entergy Louisiana LLC. The plant utilizes one nuclear generator. Waterford 3 is the larger of only two nuclear plants in Louisiana, and ranks 41st out of 55 nuclear plants nationally.
In its latest year of operation, Waterford 3 generated 8,461,792 MWh of electricity, achieving a capacity factor of 80.6%. The plant operates within the Midcontinent Independent Transmission System Operator (MISO) balancing authority and the SERC NERC region. Financial data indicates an installed cost of $3305.2 per kW, according to FERC data.
Generated from EIA, GEM, and public data sources
ISO/RTO
MISO
Market
ISO/RTO Member
NERC Region
SERC — SERC Reliability Corporation
Balancing Authority
Midcontinent Independent Transmission System Operator, Inc.. (MISO)
Grid Voltage
230.0 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.
835.9K MWh
Latest Month
8.5M MWh
Annual Generation
80.6%
Capacity Factor
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Nuclear · Entergy Louisiana, LLC · Data from 2016–2024
$4,062/kW
Installed Cost
$158/kW
Annual CapEx
$41.1/MWh
Operating Cost
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
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Market Position
ISO/RTO Market
MISO
LMP Node
EES.WATRFD3
Pricing Hub
LOUISIANA.HUB
Location Type
Generation Node
Node Source
EIA-860 direct report
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 2026-03-26
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Entergy Corporation flagged for strategic nuclear expansion investment across its fleet, context relevant to Waterford 3 long-term outlook.
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