Lake Catherine
Natural gas power plant in Hot Spring County, Arkansas. 552.5 MW of nameplate capacity across 1 generator, operated by Entergy Arkansas LLC.
Also known as Lake Catherine Power Plant · EIA plant 170
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 552.5 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- April 1970First generator online
- Operator
- Entergy Arkansas LLCEIA operator ID 814
- Grid
- MISOBalancing authority MISO
- Price nodes
- 1 MISO nodeResource nodes with prices
- Location
- Hot Spring County, AR34.4341, −92.9049
- EIA plant ID
- 170EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Lake Catherine produces
Free · EIA-923Net generation, 2025
336 GWh
336,183 MWh, final
Capacity factor, 2025
6.9%
2024: 6.2%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
93.6–477.6
GWh a year. Low 2017, high 2020
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | 1,574,861 | Not reported | 12 of 12 |
| 2001 | 1,454,399 | Not reported | 12 of 12 |
| 2002 | 1,182,799 | Not reported | 12 of 12 |
| 2003 | 471,648 | Not reported | 12 of 12 |
| 2004 | 138,050 | Not reported | 12 of 12 |
| 2005 | 195,531 | Not reported | 12 of 12 |
| 2006 | 19,377 | Not reported | 12 of 12 |
| 2007 | 29,168 | Not reported | 12 of 12 |
| 2008 | 117,829 | Not reported | 12 of 12 |
| 2009 | 132,236 | Not reported | 12 of 12 |
| 2010 | 134,392 | 2.0% | 12 of 12 |
| 2011 | 105,439 | 1.6% | 12 of 12 |
| 2012 | 612,971 | 9.3% | 12 of 12 |
| 2013 | 477,839 | Not reported | 12 of 12 |
| 2014 | 90,653 | 1.9% | 12 of 12 |
| 2015 | 159,628 | 3.3% | 12 of 12 |
| 2016 | 332,156 | 6.8% | 12 of 12 |
| 2017 | 93,590 | 1.9% | 12 of 12 |
| 2018 | 289,084 | 6.0% | 12 of 12 |
| 2019 | 127,495 | 2.6% | 12 of 12 |
| 2020 | 477,579 | 9.8% | 12 of 12 |
| 2021 | 196,186 | 4.1% | 12 of 12 |
| 2022 | 210,136 | 4.3% | 12 of 12 |
| 2023 | 169,122 | 3.5% | 12 of 12 |
| 2024 | 299,600 | 6.2% | 12 of 12 |
| 2025 | 336,183 | 6.9% | 12 of 12 |
| 2026 (provisional, partial year) | Not reported | Not reported | 0 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free account · MISOEmissions
Free · EPA CAMPDCO₂, 2025
235,942
US short tons. 2024: 196,739
SO₂, 2025
1
US short tons
NOx, 2025
452
US short tons
CO₂ per MWh, calculated
0.70 t
About 1,404 lb per MWh
1 of 1 EPA units reported CO₂ in 2025 (1, 2, 3, 4), matched to EIA plant 170 through the EPA–EIA crosswalk. The per-MWh rate is EPA CO₂ divided by EIA-923 net generation. The two reporting boundaries can differ.
Water use
Free · EIA-923 cooling, USGSWithdrawal, 2024
30,057
million gallons
Consumption, 2024
0
million gallons
Source
Lake Catherine
Surface, Fresh. Once-through
Watershed stress
Low · 0.220
USGS SUI, HUC12 Remmel Dam-Lake Hamilton
12 of 12 cooling months report withdrawal. SUI of the HUC12 containing the plant. Blank volumes are unreported, not zero.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| 4 | Natural Gas Steam Turbine | 552.5 | April 1970 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists Entergy Arkansas LLC as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Generation potential vs reported
Monthly potential at seasonal net capability, next to EIA-923 output. Shows how much of the plant's capability was used.
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Power plants near Lake Catherine
More plants operated by Entergy Arkansas LLC
Questions about Lake Catherine
How much power does Lake Catherine produce?
Lake Catherine reported 336,183 MWh (336 GWh) of net generation in 2025, a 6.9% capacity factor on 552.5 MW of nameplate capacity.
Where is Lake Catherine?
Lake Catherine is in Hot Spring County, Arkansas, at 34.4341, −92.9049. It is in the Midcontinent Independent Transmission System Operator, Inc.. balancing area (MISO).
Who operates Lake Catherine?
EIA-860M for August 2026 lists Entergy Arkansas LLC as the operator (EIA operator ID 814). The operator is not always the owner.
When did Lake Catherine start operating?
Its first generator began operating in April 1970, according to EIA-860M.
Does InfraMap have power prices for Lake Catherine?
Yes. InfraMap has MISO day-ahead and real-time prices at 1 price node linked to Lake Catherine, with the hub price and node-to-hub basis. Prices are free with an InfraMap account; pricing node names are part of InfraMap Pro.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
- EPA CAMPD annual emissions through the EPA–EIA crosswalk, 1995 to 2025
- MISO day-ahead and real-time prices; node and hub assignments as of 2026-10-05
- EIA-923 cooling water 2024 and the USGS surface water supply and use index, Water years 2010-2020 (Oct 2009 to Sep 2020), mean of monthly values
- Plant names from OpenStreetMap, © OpenStreetMap contributors (ODbL)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page