Waterford 3 — Plant Summary
- EIA Plant ID
- 4270
- Capacity
- 1199.8 MW
- Primary Fuel
- Nuclear
- Technology
- Nuclear
- Status
- Operating
- Location
- St Charles, LA
- Operating Since
- 1985
- Generators
- 1
- Operator
- Entergy Louisiana LLC
- Parent Company
- Entergy
- Annual Generation
- 8,461,792 MWh
- Capacity Factor
- 80.6%
- Balancing Authority
- Midcontinent Independent Transmission System Operator, Inc..
- ISO/RTO
- MISO
- NERC Region
- SERC
Waterford 3
OperatingNuclear
Ranked #1 of 2 Nuclear plants in LA#43 of 57 nationally
1199.8 MW Nuclear operating in St Charles, LA — Midcontinent Independent Transmission System Operator, Inc..
EIAGEMWD
1,199.8 MW
Nameplate Capacity
1
Generators
unit
Nuclear
Technology
1985
Operating Since
Location
Coordinates
29.9953, -90.4716
County
St Charles, LA
Nearby Plants
- Waterford 1 & 2Distillate Oil486.5 MW · 0.6 km
- Taft Cogeneration FacilityNatural Gas894.2 MW · 1.3 km
- Little GypsyNatural Gas1002.9 MW · 1.4 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Entergy Louisiana LLC | Entergy Nuclear Operations | Entergy |
| Owner(s) | Entergy Louisiana LLC | Entergy | — |
| Status | Operating | operating | — |
Ownership Chain
About
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
Engineering & Generators
Grid Context
NERC Region
SERC
Balancing Authority
Midcontinent Independent Transmission System Operator, Inc..
Grid Voltage
230 kV
Regulatory Status
RE
Entity Type
Investor-Owned Utility
Sector
Electric Utility
Generation
835.9K MWh
Latest Month
8.5M MWh
Annual Generation
80.6%
Capacity Factor
Jan 2023 – Dec 2025
Financial DataBeta
Source: FERC Form 1HIGH
$4,062/kW
Installed Cost
$41.1/MWh
Operating Cost
Entergy Louisiana, LLC
Reporting Utility
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
Pricing & Market Data
HIGH confidenceMarket Position
ISO/RTO Market
MISO
LMP Node
EES.WATRFD3
Pricing Hub
LOUISIANA.HUB
Location Type
Generation Node
Node Source
EIA-860 direct report
News & Articles (10)Beta
Industry·corporate
Waterford 3 celebrates 40th anniversary
Entergy Waterford 3 recently held a gathering celebrating the nuclear energy plant's 40-year anniversary in the community.
Entergy (operator)Waterford 3 (operator)
St. Charles Herald Guide·5 months ago
Regulatory·state puc
Entergy seeks approval for $68.7M nuclear plant upgrade
Entergy Louisiana is asking the Louisiana Public Service Commission to approve a $68.7 million project to boost output at its Waterford 3...
Entergy Louisiana (operator)Louisiana Public Service Commission (regulator)
New Orleans CityBusiness·7 months ago
Industry·corporate
Nuclear plants in Louisiana, Mississippi rack up low-level safety, security findings, group says
Entergy Corp.'s three nuclear power plants in southern Louisiana and Mississippi had some of the most safety and security issues among plants of their type in...
Entergy Corp. (operator)Louisiana (other)
The Advocate·8 months ago
Industry·corporate
Waterford 3 Steam Electric Station
In 2025, Waterford 3 Steam Electric Station in Killona, La., will celebrate 40 years of producing safe, clean and reliable electricity for customers in...
Entergy·9 months ago
Last updated 2026-03-14
View all 10 articles