Greenfield (UNKNOWN124268 - TAP137920)
GreenfieldOgle County, Illinois · PJM
At a glance
Greenfield (UNKNOWN124268 - TAP137920) is a greenfield datacenter candidate site in Ogle County, Illinois, scoring 51.1/100 DC Readiness — 51st of 57 scored sites in the county. Its nearest substation is UNKNOWN124268. It sits in the PJM grid region and the COMMONWEALTH EDISON CO service territory, where interconnection has averaged 4.8 years from request to operation. GridCensus catalogs 100 MW of candidate capacity here.
Power & interconnection
Speed to power
Deep queue and long historical waits — plan for a multi-year interconnection timeline and engage the utility early.
Connectivity
Site characteristics
Risk & environment
Location context
Regulatory climate
New-DC state tax exemptions suspended for 2 years (from Jul 2026).
Incentive detail: Enterprise Zone sales tax exemption; High Impact Business designation for $12M+ DC investments.
Site location
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How does Greenfield (UNKNOWN124268 - TAP137920) compare with other sites in Ogle County?
Greenfield (UNKNOWN124268 - TAP137920) ranks 51st of 57 scored candidate sites in Ogle County. Its 51.1/100 is roughly in line with the county average of 56.4. It is roughly in line with the Illinois average of 54.3 and roughly in line with the national average of 53.2.
Against the Illinois average, its strongest sub-score is natural hazard (65 vs 63) 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 Greenfield (UNKNOWN124268 - TAP137920) to power, fiber and other datacenters?
The nearest mapped substation, UNKNOWN124268, is the closest grid connection point on record and operates at 138 kV. The nearest located transmission bottleneck is QUAD CITY - SUB91 345 kV l/o CORDOVA - SUB39 345 kV (PJM), 45 miles away. For connectivity, the nearest internet exchange facility is Rochelle Technology Center at 24.8 miles. 8 fiber providers report service at the location in FCC broadband data. The closest operating datacenter on record is Rochelle Technology Center, 24.8 miles away.
What are the flood, water and hazard risks at Greenfield (UNKNOWN124268 - TAP137920)?
At the county level, FEMA's National Risk Index rates Ogle County "Relatively High".
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 Ogle County, ranked by DC Readiness.
| Site | Type | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|
| BYRON | Substation-Adjacent | 345 kV | 600 MW | 4.8 yrs | 64.3 |
| EC Near South Main Street | Greenfield | — | — | 4.8 yrs | 61.8 |
| EC Near South Main Street | Greenfield | — | — | 4.8 yrs | 61.6 |
| EC Near South Main Street | Greenfield | — | — | 4.8 yrs | 61.5 |
| EC Near South Main Street | Greenfield | — | — | 4.8 yrs | 61.2 |
| EC Near Orchard Hills Renewable Energy Station | Greenfield | — | — | 4.8 yrs | 61.2 |
| EC Near South Main Street | Greenfield | — | — | 4.8 yrs | 60.9 |
| EC Near South Main Street | Greenfield | — | — | 4.8 yrs | 60.9 |
Greenfield (UNKNOWN124268 - TAP137920): common questions
What is the DC Readiness score of Greenfield (UNKNOWN124268 - TAP137920)?
Greenfield (UNKNOWN124268 - TAP137920) scores 51.1/100 on the GridCensus DC Readiness scale, rated fair. It ranks 51st of 57 scored sites in Ogle County. The Ogle County average is 56.4 and the Illinois average is 54.3.
What is the nearest substation to Greenfield (UNKNOWN124268 - TAP137920)?
The nearest mapped substation is UNKNOWN124268, at 138 kV. GridCensus catalogs 100 MW of candidate capacity for the site.
Which electric utility serves Greenfield (UNKNOWN124268 - TAP137920)?
COMMONWEALTH EDISON CO (investor owned) holds the retail service territory that contains the site; its holding company is EXELON CORP.
What grid region is Greenfield (UNKNOWN124268 - TAP137920) in?
Greenfield (UNKNOWN124268 - TAP137920) is in the PJM region. Projects interconnecting there have averaged a 4.8-year wait from queue request to operation.
How far is Greenfield (UNKNOWN124268 - TAP137920) from an internet exchange?
The nearest internet exchange facility is Rochelle Technology Center, about 24.8 miles away; 8 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 (UNKNOWN124268 - TAP137920), Ogle County, IL”, https://gridcensus.com/datacenter-sites/illinois/ogle-county/greenfield-unknown124268-tap137920-f4c87f38 (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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Every site and score for Greenfield (UNKNOWN124268 - TAP137920), Ogle County is free to browse. Pro adds Watchtower on 25 sites, alerts when new candidate sites, datacenters or interconnection-queue requests appear in your markets, score and capacity history, and CSV export. Enterprise adds team seats, weekly data files for all 147,272 sites, the REST API and an MCP server for AI tools.