Greenfield (UNKNOWN117899 - ST FRANCOIS)
GreenfieldJefferson, Missouri · MISO
At a glance
Greenfield (UNKNOWN117899 - ST FRANCOIS) is a greenfield datacenter candidate site in Jefferson, Missouri, scoring 49.1/100 DC Readiness — 29th of 31 scored sites in the county. Its nearest substation is UNKNOWN117899. It sits in the MISO grid region and the UNION ELECTRIC CO - (MO) 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
No notable statewide DC restriction on record; confirm local zoning and utility tariffs.
Incentive detail: Qualified data center sales tax exemption (2019 law); state income tax credits.
Site location
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How does Greenfield (UNKNOWN117899 - ST FRANCOIS) compare with other sites in Jefferson?
Greenfield (UNKNOWN117899 - ST FRANCOIS) ranks 29th of 31 scored candidate sites in Jefferson. Its 49.1/100 is roughly in line with the county average of 53.7. It is about 12% below the Missouri average of 55.7 and roughly in line with the national average of 53.2.
Against the Missouri average, its strongest sub-score is natural hazard (62 vs 61) and its weakest is fiber connectivity (56 vs 76). Power and speed to power each carry 20% of the composite score, fiber 12%, water 7% and hazard 6%.
How close is Greenfield (UNKNOWN117899 - ST FRANCOIS) to power, fiber and other datacenters?
The nearest mapped substation, UNKNOWN117899, is the closest grid connection point on record and operates at 138 kV. The nearest located transmission bottleneck is BULN_KEL_7363_ftlo_LUTS_NEWMAD_ESEX_345kV (MISO), 79 miles away. For connectivity, the nearest internet exchange facility is Cogent St Louis at 37.1 miles. 5 fiber providers report service at the location in FCC broadband data. The closest operating datacenter on record is TierPoint St Louis, 37.5 miles away.
What are the flood, water and hazard risks at Greenfield (UNKNOWN117899 - ST FRANCOIS)?
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 Jefferson "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 Jefferson, ranked by DC Readiness.
| Site | Type | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|
| UNKNOWN117709 | Substation-Adjacent | 345 kV | 600 MW | 4.3 yrs | 62.5 |
| UNKNOWN117702 | Substation-Adjacent | 138 kV | 100 MW | 4.3 yrs | 57.9 |
| UNKNOWN117895 | Substation-Adjacent | 138 kV | 100 MW | 4.3 yrs | 57.2 |
| EC Near Rush Island | Greenfield | — | — | 4.3 yrs | 57.2 |
| TAP139433 | Substation-Adjacent | 138 kV | 100 MW | 4.3 yrs | 57.1 |
| EC Near Rush Island | Greenfield | — | — | 4.3 yrs | 57.1 |
| EC Near Rush Island | Greenfield | — | — | 4.3 yrs | 57.1 |
| UNKNOWN121747 | Substation-Adjacent | 138 kV | 100 MW | 4.3 yrs | 56.9 |
Greenfield (UNKNOWN117899 - ST FRANCOIS): common questions
What is the DC Readiness score of Greenfield (UNKNOWN117899 - ST FRANCOIS)?
Greenfield (UNKNOWN117899 - ST FRANCOIS) scores 49.1/100 on the GridCensus DC Readiness scale, rated fair. It ranks 29th of 31 scored sites in Jefferson. The Jefferson average is 53.7 and the Missouri average is 55.7.
What is the nearest substation to Greenfield (UNKNOWN117899 - ST FRANCOIS)?
The nearest mapped substation is UNKNOWN117899, at 138 kV. GridCensus catalogs 100 MW of candidate capacity for the site.
Which electric utility serves Greenfield (UNKNOWN117899 - ST FRANCOIS)?
UNION ELECTRIC CO - (MO) (investor owned) holds the retail service territory that contains the site; its holding company is AMEREN CORP.
What grid region is Greenfield (UNKNOWN117899 - ST FRANCOIS) in?
Greenfield (UNKNOWN117899 - ST FRANCOIS) is in the MISO region. Projects interconnecting there have averaged a 4.3-year wait from queue request to operation.
Is Greenfield (UNKNOWN117899 - ST FRANCOIS) 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 (UNKNOWN117899 - ST FRANCOIS) from an internet exchange?
The nearest internet exchange facility is Cogent St Louis, about 37.1 miles away; 5 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 (UNKNOWN117899 - ST FRANCOIS), Jefferson, MO”, https://gridcensus.com/datacenter-sites/missouri/jefferson/greenfield-unknown117899-st-francois-21f46c08 (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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