# Marshalltown Generating Station

MISO asset profile · https://askthegrid.com/assets/facilities/marshalltown-generating-station

Interstate Power and Light Company - Marshall County - MISO

Marshalltown Generating Station is located at 2115 East Nevada Street, Marshalltown, Marshall County, Iowa. Interstate Power and Light Company owns and operates the plant under the Alliant Energy trade name. The EIA plant record comprises CTG1 and CTG2 natural-gas combined-cycle combustion turbines, STG1 combined-cycle steam turbine, PV1 solar photovoltaic generation, and BESS1 battery storage. The principal gas block comprises two Siemens SGT6-5000F gas turbines each rated 222.7 MW, two Nooter/Eriksen heat-recovery steam generators, and one Siemens SST6-5000 steam turbine rated 260.5 MW, for a combined-cycle subtotal of 705.9 MW. The EIA-listed solar and battery units add 2.6 MW and 0.3 MW, respectively. Total plant nameplate capacity is 708.8 MW.

## Metrics

- **Nameplate capacity:** 708.8 MW — Canonical EIA plant baseline.
- **Registry anchor:** Plant 58236 — plant-58236

## Facts

- **Technology:** Solar Photovoltaic, Batteries, Natural Gas Fired Combined Cycle
- **Operator:** Interstate Power and Light Company

## Related parties

- **Owner / operator:** Interstate Power and Light Company — Owner and operator ([source](https://www.alliantenergy.com))
- **Parent company:** Alliant Energy Corporation — Parent company ([source](https://www.alliantenergy.com))
- **EPC contractor:** KBR, Inc. — Engineering, procurement, and construction contractor ([source](https://www.kbr.com))
- **Equipment supplier:** Siemens Energy — Gas-turbine and steam-turbine equipment supplier ([source](https://www.siemens-energy.com/global/en/home/products-services/product/sgt6-5000f.html))
- **Equipment supplier:** Nooter/Eriksen — Heat-recovery steam-generator supplier ([source](https://www.nootereriksen.com))
- **Regulator:** Iowa Utilities Board — Siting and ratemaking regulator ([source](https://iub.iowa.gov))

## Sources

- [investors.alliantenergy.com](https://investors.alliantenergy.com/News--Presentations/news/news-details/2012/Interstate-Power-and-Light-Co.-seeks-regulatory-approval-for-proposed-Marshalltown-Generating-Station/default.aspx) — investors.alliantenergy.com · public_source — Source retained for exact-record publication review.
- [investors.alliantenergy.com](https://investors.alliantenergy.com/News--Presentations/news/news-details/2013/Alliant-Energy-accepts-proposed-IUB-order-to-construct-Marshalltown-power-plant/default.aspx) — investors.alliantenergy.com · public_source — Source retained for exact-record publication review.
- [investors.alliantenergy.com](https://investors.alliantenergy.com/News--Presentations/news/news-details/2014/Alliant-Energy-begins-construction-on-Marshalltown-Generating-Station/default.aspx) — investors.alliantenergy.com · public_source — Source retained for exact-record publication review.
- [alliantenergy.com](https://www.alliantenergy.com/our-energy/natural-gas/bobcat) — alliantenergy.com · public_source — Source retained for exact-record publication review.

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Canonical page: https://askthegrid.com/assets/facilities/marshalltown-generating-station
Website: [Interstate Power and Light Company](https://www.alliantenergy.com)

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