302 South 3rd Avenue
IndustrialMarshall County, Iowa · MISO
At a glance
302 South 3rd Avenue is an industrial datacenter candidate site in Marshall County, Iowa, scoring 52.1/100 DC Readiness — 37th of 70 scored sites in the county. It sits in the MISO grid region and the INTERSTATE POWER AND LIGHT CO service territory, where interconnection has averaged 4.3 years from request to operation.
Power & interconnection
Speed to power
Middle-of-the-pack interconnection conditions for this grid.
Connectivity
Site characteristics
Risk & environment
Location context
Regulatory climate
Strong incentives; utilities courting hyperscale load.
Incentive detail: Sales tax exemption on DC equipment for $1M+ investments; property tax phase-in for new construction.
Site location
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How does 302 South 3rd Avenue compare with other sites in Marshall County?
302 South 3rd Avenue ranks 37th of 70 scored candidate sites in Marshall County. Its 52.1/100 is roughly in line with the county average of 54.2. It is roughly in line with the Iowa average of 56.4 and roughly in line with the national average of 53.2.
Against the Iowa average, its strongest sub-score is natural hazard (70 vs 69) and its weakest is power availability (30 vs 37). Power and speed to power each carry 20% of the composite score, fiber 12%, water 7% and hazard 6%.
How close is 302 South 3rd Avenue to power, fiber and other datacenters?
The nearest located transmission bottleneck is ALW16X26_WAPELLO_TR91_TR91 (MISO), 77 miles away. For connectivity, the nearest internet exchange facility is Cologix DSM2 at 37.5 miles. 12 fiber providers report service at the location in FCC broadband data. The closest operating datacenter on record is Connect Cedar Valley, 37.5 miles away.
What are the flood, water and hazard risks at 302 South 3rd Avenue?
At the county level, FEMA's National Risk Index rates Marshall County "Relatively Moderate".
Full DC Readiness breakdown
All 13 weighted sub-scores (0–100) behind the composite DC Readiness score.
Nearby comparable sites
Other scored datacenter candidate sites in Marshall County, ranked by DC Readiness.
| Site | Type | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|
| Marshall County Landfill Solar | Brownfield | — | 0 MW | 4.3 yrs | 65.2 |
| Sutherland | Brownfield | — | 157 MW | 4.3 yrs | 63.0 |
| EC Near Sutherland | Greenfield | — | — | 4.3 yrs | 61.7 |
| EC Coal Marshall County | Greenfield | — | — | 4.3 yrs | 60.2 |
| EC Near Sutherland | Greenfield | — | — | 4.3 yrs | 60.1 |
| EC Near Sutherland | Greenfield | — | — | 4.3 yrs | 59.9 |
| EC Near Sutherland | Greenfield | — | — | 4.3 yrs | 59.4 |
| EC Near Sutherland | Greenfield | — | — | 4.3 yrs | 59.3 |
302 South 3rd Avenue: common questions
What is the DC Readiness score of 302 South 3rd Avenue?
302 South 3rd Avenue scores 52.1/100 on the GridCensus DC Readiness scale, rated fair. It ranks 37th of 70 scored sites in Marshall County. The Marshall County average is 54.2 and the Iowa average is 56.4.
Which electric utility serves 302 South 3rd Avenue?
INTERSTATE POWER AND LIGHT CO (investor owned) holds the retail service territory that contains the site; its holding company is ALLIANT ENERGY CORP.
What grid region is 302 South 3rd Avenue in?
302 South 3rd Avenue is in the MISO region. Projects interconnecting there have averaged a 4.3-year wait from queue request to operation.
How far is 302 South 3rd Avenue from an internet exchange?
The nearest internet exchange facility is Cologix DSM2, about 37.5 miles away; 12 fiber providers report service at the location.
Related pages
About this data
Source: GridCensus composite of HIFLD transmission and substation data, EIA, FEMA National Risk Index, FCC broadband data, PeeringDB and ISO interconnection queues, as published October 10, 2026 — GridCensus refreshes it monthly. See the methodology for how records are matched, cleaned and scored.
Cite as: GridCensus, “302 South 3rd Avenue, Marshall County, IA”, https://gridcensus.com/datacenter-sites/iowa/marshall-county/302-south-3rd-avenue-ca8e76a2 (data as of October 10, 2026).
Dataset updated . Screening estimates derived from public data sources.
Figures are screening estimates derived from public infrastructure data. Catalogued capacity reflects theoretical candidate capacity, not deliverable or committed interconnection. Confirm all values with the utility, ISO, and on-the-ground due diligence.
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