# Lake Catherine

MISO asset profile · https://askthegrid.com/assets/facilities/lake-catherine

## Current generation inventory

EIA plant 170 · Inventory reporting month: 2026-08.

- natural gas: 552.5 MW operating nameplate
- Capacity basis: operating_generator_nameplate_mw
- Source inventory: [EIA-860M workbook (preliminary)](https://www.eia.gov/electricity/data/eia860m/xls/august_generator2026.xlsx)
- Inventory retrieved: 2026-10-10T02:12:40.665346+00:00
- Filed coordinate (longitude, latitude): -92.9049, 34.4341
- OSM extract: 2026-10-08T20:21:06Z
- OSM mapped edit: 2026-01-19 20:23:33+00:00
- Map prepared: 2026-10-10T02:28:23.966881+00:00

Battery power (MW) and stored energy (MWh) are separate measures. Shared physical-site membership does not establish electrical connectivity, settlement or a common export limit.

## Reviewed overview

Lake Catherine is an Entergy Arkansas generating site in Malvern, Arkansas, with a history of generation in the region stretching back more than a century. Unit 4, which has served Arkansas customers for more than 50 years, is scheduled for retirement at the end of 2027. Entergy Arkansas broke ground in August 2026 on the 446 MW Ironwood Power Station, a simple-cycle natural gas plant on the site that will replace it.

## Reviewed metrics

- **Nameplate capacity:** 552.5 MW — Canonical EIA plant baseline.
- **Registry anchor:** Plant 170 — plant-170

## Facts

- **Technology:** Natural Gas Steam Turbine
- **Operator:** Entergy Arkansas

## Related parties

- **Owner / operator:** Entergy Arkansas — owner ([source](https://www.entergy.com/arkansas))

## Sources

- [entergy.com](https://www.entergy.com/news/entergy-arkansas-breaks-ground-on-ironwood-power-station) — entergy.com · public_source — Source retained for exact-record publication review.

---

Canonical page: https://askthegrid.com/assets/facilities/lake-catherine
Website: [Entergy Arkansas](https://www.entergy.com/arkansas)

Source: Ask the Grid — https://askthegrid.com/