Lake Catherine — Plant Summary
- EIA Plant ID
- 170
- Capacity
- 552.5 MW
- Primary Fuel
- Natural Gas
- Technology
- Natural Gas Steam Turbine
- Status
- Operating
- Location
- Hot Spring, AR
- Operating Since
- 1970
- Generators
- 1
- Operator
- Entergy Arkansas LLC
- Parent Company
- Entergy
- Annual Generation
- 299,600 MWh
- Capacity Factor
- 6.1%
- Balancing Authority
- Midcontinent Independent Transmission System Operator, Inc..
- ISO/RTO
- MISO
- NERC Region
- SERC
Lake Catherine
OperatingNatural Gas
Ranked #6 of 18 Natural Gas plants in AR#443 of 2009 nationally
552.5 MW Natural Gas operating in Hot Spring, AR — Midcontinent Independent Transmission System Operator, Inc..
EIAWD
552.5 MW
Nameplate Capacity
1
Generators
unit
Natural Gas Steam Turbine
Technology
1970
Operating Since
Location
Coordinates
34.4341, -92.9049
County
Hot Spring, AR
Nearby Plants
- RemmelHydro9 MW · 1.2 km
- Magnet CoveNatural Gas746 MW · 6.7 km
- CarpenterHydro56 MW · 11.2 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Entergy Arkansas LLC | Entergy Arkansas | — |
| Owner(s) | Entergy Arkansas LLC | Entergy | — |
| Status | Operating | — | — |
Ownership Chain
About
Lake Catherine is a 552.5 MW natural gas-fired power plant located in Hot Spring County, Arkansas. The plant began operating in 1970 and has one generator utilizing natural gas steam turbine technology. It is owned by Entergy and operated by Entergy Arkansas LLC. Lake Catherine ranks as the 6th largest power plant in Arkansas out of 12, and 448th nationally out of 945 plants.
The plant operates within the Midcontinent Independent Transmission System Operator (MISO) balancing authority and the SERC NERC region. In the latest year of reported generation data, Lake Catherine produced 299,600 MWh of electricity, resulting in a capacity factor of 6.1%. Financial data indicates an installed cost of $86.21 per kW, based on FERC filings.
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
115 kV
Regulatory Status
RE
Entity Type
Investor-Owned Utility
Sector
Electric Utility
Generation
0 MWh
Latest Month
299.6K MWh
Annual Generation
6.1%
Capacity Factor
Jan 2022 – Dec 2024
Financial DataBeta
Source: FERC Form 1HIGH
$130/kW
Installed Cost
$88.7/MWh
Operating Cost
Entergy Arkansas, Inc.
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
EAI.LK_CATH4
Pricing Hub
ARKANSAS.HUB
Location Type
Generation Node
Node Source
EIA-860 direct report
News & Articles (10)Beta
Industry·corporate
Entergy Arkansas announces Ironwood power plant vendor fair for Arkansas contractors
From Entergy Arkansas. Entergy Arkansas has announced it will host a vendor fair for companies interested in pursuing contract opportunities...
Entergy Arkansas (operator)
Arkadelphian·4 days ago
Industry·corporate
Entergy Arkansas to host Ironwood power plant vendor fair for local contractors
LITTLE ROCK, Ark.- Entergy Arkansas will host a vendor fair to recruit contractors for the construction of the Ironwood power plant.
Entergy Arkansas (operator)
KARK·4 days ago
Regulatory·rate case
Entergy Arkansas pitches rate hike of $20 a month to fund improvements
Entergy Arkansas plans to add about 2600 megawatts of new, more fuel-efficient power generation and will re-power about 1600 megawatts of...
Entergy Arkansas (operator)
The Arkansas Democrat-Gazette·3 months ago
Industry·corporate
Entergy Plans Gas Plant Near Redfield as Coal Units Retire
It wasn't exactly news when Entergy Arkansas announced early this month that it's planning to build a new natural gas-fired power plant near...
Entergy Arkansas (operator)
Arkansas Business·7 months ago
Last updated 2026-03-14
View all 10 articles