MT VERNON
Substation-AdjacentLinn County, Iowa · MISO
At a glance
MT VERNON is a substation-adjacent datacenter candidate site in Linn County, Iowa, scoring 61.0/100 DC Readiness — 28th of 105 scored sites in the county. Its nearest substation is MT VERNON (0 mi, 161 kV). 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 100 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 MT VERNON compare with other sites in Linn County?
MT VERNON ranks 28th of 105 scored candidate sites in Linn County. Its 61.0/100 is roughly in line with the county average of 58.4. It is roughly in line with the Iowa average of 56.4 and about 15% above the national average of 53.2.
Against the Iowa average, its strongest sub-score is power availability (60 vs 37) and its weakest is speed to power (50 vs 50). Power and speed to power each carry 20% of the composite score, fiber 12%, water 7% and hazard 6%.
How close is MT VERNON to power, fiber and other datacenters?
The nearest mapped substation, MT VERNON, is about 0 miles away and operates at 161 kV. The nearest located transmission bottleneck is ALW16X26_WAPELLO_TR91_TR91 (MISO), 84 miles away. For connectivity, the nearest internet exchange facility is ark data centers - Cedar Rapids ,IA at 10.6 miles. 22 fiber providers report service at the location in FCC broadband data. The closest operating datacenter on record is ark data centers - Cedar Rapids ,IA, 10.6 miles away.
What are the flood, water and hazard risks at MT VERNON?
At the county level, FEMA's National Risk Index rates Linn 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 Linn County, ranked by DC Readiness.
| Site | Type | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|
| Alliant SBD 9302 Aegon NP | Brownfield | — | 1 MW | 4.3 yrs | 67.2 |
| ARNOLD | Substation-Adjacent | 345 kV | 600 MW | 4.3 yrs | 67.1 |
| EC Coal Linn County | Greenfield | — | — | 4.3 yrs | 63.6 |
| EC Near Red Cedar | Greenfield | — | — | 4.3 yrs | 63.5 |
| HIAWATHA | Substation-Adjacent | 161 kV | 100 MW | 4.3 yrs | 63.0 |
| EC Coal Linn County | Greenfield | — | — | 4.3 yrs | 62.5 |
| UNKNOWN132112 | Substation-Adjacent | 161 kV | 100 MW | 4.3 yrs | 62.5 |
| EC Near Red Cedar | Greenfield | — | — | 4.3 yrs | 62.4 |
MT VERNON: common questions
What is the DC Readiness score of MT VERNON?
MT VERNON scores 61.0/100 on the GridCensus DC Readiness scale, rated good. It ranks 28th of 105 scored sites in Linn County. The Linn County average is 58.4 and the Iowa average is 56.4.
What is the nearest substation to MT VERNON?
The nearest mapped substation is MT VERNON, about 0 miles away, at 161 kV. GridCensus catalogs 100 MW of candidate capacity for the site.
Which electric utility serves MT VERNON?
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 MT VERNON in?
MT VERNON is in the MISO region. Projects interconnecting there have averaged a 4.3-year wait from queue request to operation.
How far is MT VERNON from an internet exchange?
The nearest internet exchange facility is ark data centers - Cedar Rapids ,IA, about 10.6 miles away; 22 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, “MT VERNON, Linn County, IA”, https://gridcensus.com/datacenter-sites/iowa/linn-county/mt-vernon-49578767 (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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