OZ Decatur
GreenfieldDecatur, Iowa · MISO
At a glance
OZ Decatur is a greenfield datacenter candidate site in Decatur, Iowa, scoring 59.0/100 DC Readiness — 1st of 2 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 OZ Decatur compare with other sites in Decatur?
OZ Decatur ranks 1st of 2 scored candidate sites in Decatur. Its 59.0/100 is roughly in line with the county average of 58.2. It is roughly in line with the Iowa average of 56.4 and about 11% above the national average of 53.2.
Against the Iowa average, its strongest sub-score is natural hazard (70 vs 69) and its weakest is fiber connectivity (61 vs 77). Power and speed to power each carry 20% of the composite score, fiber 12%, water 7% and hazard 6%.
How close is OZ Decatur to power, fiber and other datacenters?
The nearest located transmission bottleneck is ALW16X26_WAPELLO_TR91_TR91 (MISO), 83 miles away. For connectivity, the nearest internet exchange facility is Aureon West Des Moines at 59 miles. 2 fiber providers report service at the location in FCC broadband data. The closest operating datacenter on record is Microsoft, 51.6 miles away.
What are the flood, water and hazard risks at OZ Decatur?
The site is in FEMA flood zone X, outside the Special Flood Hazard Area (minimal or moderate flood risk). WRI rates baseline water stress at 0.60 on a 0–5 scale. No mapped wetlands are recorded on the parcel. At the county level, FEMA's National Risk Index rates Decatur "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 Decatur, ranked by DC Readiness.
| Site | Type | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|
| OZ Decatur | Greenfield | — | — | 4.3 yrs | 57.3 |
OZ Decatur: common questions
What is the DC Readiness score of OZ Decatur?
OZ Decatur scores 59.0/100 on the GridCensus DC Readiness scale, rated good. It ranks 1st of 2 scored sites in Decatur. The Decatur average is 58.2 and the Iowa average is 56.4.
Which electric utility serves OZ Decatur?
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 OZ Decatur in?
OZ Decatur is in the MISO region. Projects interconnecting there have averaged a 4.3-year wait from queue request to operation.
Is OZ Decatur in a flood zone?
The site is in FEMA flood zone X, outside the Special Flood Hazard Area (minimal or moderate flood risk).
Who owns OZ Decatur?
Parcel records list the owner as MIDAMERICAN ENERGY CO (private land).
How far is OZ Decatur from an internet exchange?
The nearest internet exchange facility is Aureon West Des Moines, about 59 miles away; 2 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, “OZ Decatur, Decatur, IA”, https://gridcensus.com/datacenter-sites/iowa/decatur/oz-decatur-48a5af17 (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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