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.
EIA plant 57874 · Inventory for Aug 2026.
| Generator | Technology | Status | Power (MW) | Energy (MWh) |
|---|---|---|---|---|
| VIIWF | Onshore Wind Turbine | Operating | 44.6 | Unknown |
| VIWF | Onshore Wind Turbine | Operating | 105.6 | Unknown |
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Operating generator records and technology attributes reported through EIA-860.
| Generator | Capacity | Technology | Operation | Status |
|---|---|---|---|---|
| VIIWF | 44.6 MW 44.6 MW summer | Onshore Wind Turbine Wind · WT | Dec 2013 | Operating |
| VIWF | 105.6 MW 105.6 MW summer | Onshore Wind Turbine Wind · WT | Nov 2012 | Operating |
Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.
Monthly generation is reported through EIA-923. Capacity factor uses the current EIA nameplate capacity and is shown only for complete calendar years.
Deterministic links to ERCOT market resources, price records, outage disclosures, queue records, and nearby infrastructure. Candidate joins remain labeled until corroborated.
Parties, market resources, and identifiers tied to this asset, with owner, operator, developer, EPC, compliance provider, and interconnecting entity roles kept separate.
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| Largest reported plants | Capacity | State | |
|---|---|---|---|
| Walter Scott Jr Energy Center | 1,648.3 MW | IA | |
| Louisa | 811.9 MW | IA | |
| George Neal South | 695.9 MW | IA | |
| George Neal North | 584.1 MW | IA | |
| Greater Des Moines | 576.3 MW | IA | |
| Highland Wind Project (IA) | 502 MW | IA | |
Project milestones and public references behind the asset profile.
Answered from the published record above. Questions whose inputs this profile does not carry are omitted rather than estimated.
Vienna Wind Farm reports 150.2 MW wind of operating nameplate capacity. These technology ratings do not establish a common export limit. Source: EIA Aug 2026.
Vienna Wind Farm is a Onshore Wind Turbine facility in Marshall County, IA, participating in the MISO market.
Vienna Wind Farm is in Marshall County, IA, inside the MISO balancing area.
Vienna Wind Farm is operated by MidAmerican Energy Co according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.
Vienna Wind Farm reported 397.6 GWh over the twelve months to 2024-12. Figures are net generation as filed to EIA-923.
By capacity, Vienna Wind Farm ranks #450 of 1,374 operating plants of the same technology nationally. It ranks #41 of 123 in IA.
Plants within 25 km, nearest first, regardless of technology. Proximity is straight-line distance between mapped plant coordinates; it does not by itself establish a shared point of interconnection.
Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.
