# Alliant Energy Neenah

MISO asset profile · https://askthegrid.com/assets/facilities/alliant-energy-neenah

## Current generation inventory

EIA plant 55135 · Inventory reporting month: 2026-08.

- natural gas: 371 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): -88.5064, 44.1936
- OSM extract: 2026-10-08T20:21:06Z
- OSM mapped edit: 2023-01-25 04:37:37+00:00
- Map prepared: 2026-10-10T02:28:22.575685+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

Alliant Energy Neenah is a natural gas-fired peaking plant in the town of Neenah, Wisconsin, that began operation in 2000. Alliant is upgrading the station with more efficient, fast-ramping gas turbines to raise capacity from 300 MW to roughly 440 MW, with construction planned from August 2025 to summer 2026.

## Reviewed metrics

- **Nameplate capacity:** 371 MW — Canonical EIA plant baseline.
- **Registry anchor:** Plant 55135 — plant-55135

## Facts

- **Technology:** Natural Gas Fired Combustion Turbine
- **Operator:** Wisconsin Power & Light Co

## Related parties

- **Owner / acquirer:** Wisconsin Power and Light Company — owner ([source](https://www.alliantenergy.com))
- **Parent company:** Alliant Energy Corp. — parent ([source](https://www.alliantenergy.com))

## Sources

- [electricityforum.com](https://electricityforum.com/news/utilitypurchasesneenahplant) — electricityforum.com · public_source — Source retained for exact-record publication review.

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Canonical page: https://askthegrid.com/assets/facilities/alliant-energy-neenah
Website: [Wisconsin Power and Light Company](https://www.alliantenergy.com)

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