Greenfield (SUB 92 - LOUISA)
GreenfieldMuscatine County, Iowa · MISO
At a glance
Greenfield (SUB 92 - LOUISA) is a greenfield datacenter candidate site in Muscatine County, Iowa, scoring 58.3/100 DC Readiness — 30th of 62 scored sites in the county. Its nearest substation is SUB 92. 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. GridCensus catalogs 600 MW of candidate capacity here.
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 Greenfield (SUB 92 - LOUISA) compare with other sites in Muscatine County?
Greenfield (SUB 92 - LOUISA) ranks 30th of 62 scored candidate sites in Muscatine County. Its 58.3/100 is roughly in line with the county average of 57.2. 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 power availability (59 vs 37) and its weakest is fiber connectivity (70 vs 77). Power and speed to power each carry 20% of the composite score, fiber 12%, water 7% and hazard 6%.
How close is Greenfield (SUB 92 - LOUISA) to power, fiber and other datacenters?
The nearest mapped substation, SUB 92, is the closest grid connection point on record and operates at 345 kV. The nearest located transmission bottleneck is ALW16X26_WAPELLO_TR91_TR91 (MISO), 65 miles away. For connectivity, the nearest internet exchange facility is DartPoints North Liberty, IA at 31.8 miles. 9 fiber providers report service at the location in FCC broadband data. The closest operating datacenter on record is ForceAmp.com, 28.6 miles away.
What are the flood, water and hazard risks at Greenfield (SUB 92 - LOUISA)?
The site is in FEMA flood zone X, outside the Special Flood Hazard Area (minimal or moderate flood risk). At the county level, FEMA's National Risk Index rates Muscatine 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 Muscatine County, ranked by DC Readiness.
| Site | Type | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|
| SUB 92 | Substation-Adjacent | 345 kV | 600 MW | 4.3 yrs | 65.5 |
| EC Near Fair Station | Greenfield | — | — | 4.3 yrs | 63.2 |
| EC Near Wilton | Greenfield | — | — | 4.3 yrs | 62.3 |
| EC Near Muscatine Plant #1 | Greenfield | — | — | 4.3 yrs | 61.6 |
| Durant | Brownfield | — | 2 MW | 4.3 yrs | 61.6 |
| EC Near Fair Station | Greenfield | — | — | 4.3 yrs | 61.4 |
| EC Near Fair Station | Greenfield | — | — | 4.3 yrs | 61.3 |
| EC Near Muscatine Plant #1 | Greenfield | — | — | 4.3 yrs | 60.9 |
Greenfield (SUB 92 - LOUISA): common questions
What is the DC Readiness score of Greenfield (SUB 92 - LOUISA)?
Greenfield (SUB 92 - LOUISA) scores 58.3/100 on the GridCensus DC Readiness scale, rated good. It ranks 30th of 62 scored sites in Muscatine County. The Muscatine County average is 57.2 and the Iowa average is 56.4.
What is the nearest substation to Greenfield (SUB 92 - LOUISA)?
The nearest mapped substation is SUB 92, at 345 kV. GridCensus catalogs 600 MW of candidate capacity for the site.
Which electric utility serves Greenfield (SUB 92 - LOUISA)?
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 Greenfield (SUB 92 - LOUISA) in?
Greenfield (SUB 92 - LOUISA) is in the MISO region. Projects interconnecting there have averaged a 4.3-year wait from queue request to operation.
Is Greenfield (SUB 92 - LOUISA) in a flood zone?
The site is in FEMA flood zone X, outside the Special Flood Hazard Area (minimal or moderate flood risk).
How far is Greenfield (SUB 92 - LOUISA) from an internet exchange?
The nearest internet exchange facility is DartPoints North Liberty, IA, about 31.8 miles away; 9 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, “Greenfield (SUB 92 - LOUISA), Muscatine County, IA”, https://gridcensus.com/datacenter-sites/iowa/muscatine-county/greenfield-sub-92-louisa-168b7476 (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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