# Vienna Wind Farm

MISO asset profile · https://askthegrid.com/assets/facilities/vienna-wind-farm

## Current generation inventory

EIA plant 57874 · Inventory reporting month: 2026-08.

- wind: 150.2 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: 2026-10-10T22:49:53.020309+00:00
- Filed coordinate (longitude, latitude): -92.77611, 42.159444
- OSM extract: 2026-10-09T20:21:04Z
- OSM mapped edit: 2026-02-06 08:16:15+00:00
- Map prepared: 2026-10-10T23:05:24.427537+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

Vienna Wind Farm is a MidAmerican Energy Company wind project in Marshall and Tama counties, Iowa. A 44.6 MW expansion, Vienna II, was built by Wanzek Construction. MidAmerican's renewable portfolio listing now shows the Vienna wind farm at 161.63 MW.

## Reviewed metrics

- **Nameplate capacity:** 150.2 MW — Canonical EIA plant baseline.
- **Registry anchor:** Plant 57874 — plant-57874

## Facts

- **Technology:** Onshore Wind Turbine
- **Operator:** MidAmerican Energy Co

## Related parties

- **Owner / acquirer:** MidAmerican Energy Company — owner ([source](https://www.midamericanenergy.com))
- **Equipment supplier:** Siemens — equipment_supplier ([source](https://www.siemens.com))
- **Construction contractor:** Wanzek Construction, Inc. — construction_contractor

## Sources

- [midamericanenergy.com](https://www.midamericanenergy.com/media/pdf/iowa-wind-solar-farm-locations.pdf) — midamericanenergy.com · public_source — Source retained for exact-record publication review.
- [renewableenergymagazine.com](https://www.renewableenergymagazine.com/wind/warren-buffett-s-midamerican-energy-orders-176) — renewableenergymagazine.com · public_source — Source retained for exact-record publication review.
- [windsystemsmag.com](https://www.windsystemsmag.com/news/midamerican-energy-begins-iowaa%C2%80%C2%99s-largest-wind-expansion/) — windsystemsmag.com · public_source — Source retained for exact-record publication review.

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Canonical page: https://askthegrid.com/assets/facilities/vienna-wind-farm
Website: [MidAmerican Energy Company](https://www.midamericanenergy.com)

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