EC Near Alliant SBD 8603 Donnelley
GreenfieldStory, Iowa · MISO
At a glance
EC Near Alliant SBD 8603 Donnelley is a greenfield datacenter candidate site in Story, Iowa, scoring 60.1/100 DC Readiness — 29th of 46 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 EC Near Alliant SBD 8603 Donnelley compare with other sites in Story?
EC Near Alliant SBD 8603 Donnelley ranks 29th of 46 scored candidate sites in Story. Its 60.1/100 is roughly in line with the county average of 59.2. It is roughly in line with the Iowa average of 56.4 and about 13% above the national average of 53.2.
Against the Iowa average, its strongest sub-score is fiber connectivity (81 vs 77) and its weakest is natural hazard (55 vs 69). Power and speed to power each carry 20% of the composite score, fiber 12%, water 7% and hazard 6%.
How close is EC Near Alliant SBD 8603 Donnelley to power, fiber and other datacenters?
The nearest located transmission bottleneck is ALW16X26_WAPELLO_TR91_TR91 (MISO), 85 miles away. For connectivity, the nearest internet exchange facility is LightEdge Des Moines 1 (DSM1) at 18.5 miles. 16 fiber providers report service at the location in FCC broadband data. The closest operating datacenter on record is Meta, 18.2 miles away.
What are the flood, water and hazard risks at EC Near Alliant SBD 8603 Donnelley?
The site is in FEMA flood zone A, a Special Flood Hazard Area — land with at least a 1% annual chance of flooding. 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 Story "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 Story, ranked by DC Readiness.
| Site | Type | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|
| EC Near Iowa State University | Greenfield | — | — | 4.3 yrs | 65.4 |
| EC Near Iowa State University | Greenfield | — | — | 4.3 yrs | 65.2 |
| EC Near Iowa State University | Greenfield | — | — | 4.3 yrs | 64.2 |
| EC Near Iowa State University | Greenfield | — | — | 4.3 yrs | 63.0 |
| EC Near NCAH Central Utility Plant | Greenfield | — | — | 4.3 yrs | 62.7 |
| Iowa State University | Brownfield | — | 9 MW | 4.3 yrs | 62.4 |
| UNKNOWN130993 | Substation-Adjacent | 161 kV | 100 MW | 4.3 yrs | 62.3 |
| EC Near Iowa State University | Greenfield | — | — | 4.3 yrs | 62.3 |
EC Near Alliant SBD 8603 Donnelley: common questions
What is the DC Readiness score of EC Near Alliant SBD 8603 Donnelley?
EC Near Alliant SBD 8603 Donnelley scores 60.1/100 on the GridCensus DC Readiness scale, rated good. It ranks 29th of 46 scored sites in Story. The Story average is 59.2 and the Iowa average is 56.4.
Which electric utility serves EC Near Alliant SBD 8603 Donnelley?
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 EC Near Alliant SBD 8603 Donnelley in?
EC Near Alliant SBD 8603 Donnelley is in the MISO region. Projects interconnecting there have averaged a 4.3-year wait from queue request to operation.
Is EC Near Alliant SBD 8603 Donnelley in a flood zone?
The site is in FEMA flood zone A, a Special Flood Hazard Area — land with at least a 1% annual chance of flooding.
Who owns EC Near Alliant SBD 8603 Donnelley?
Parcel records list the owner as MIDAMERICAN ENERGY CO (private land).
How far is EC Near Alliant SBD 8603 Donnelley from an internet exchange?
The nearest internet exchange facility is LightEdge Des Moines 1 (DSM1), about 18.5 miles away; 16 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, “EC Near Alliant SBD 8603 Donnelley, Story, IA”, https://gridcensus.com/datacenter-sites/iowa/story/ec-near-alliant-sbd-8603-donnelley-c63975c1 (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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