Marion
BrownfieldMarion, Williamson, Illinois · Southern Illinois Power Coop
Marion is a coal plant in Marion, Williamson, Illinois, retired 2020-11-01. Retired generation sites are among the most attractive datacenter redevelopment targets: the existing interconnection was sized for roughly 173 MW of generation, so the grid hookup, transmission rights, and often cooling-water access are already in place — collapsing the speed-to-power timeline versus a greenfield build.
Former use & capacity
Grid hookup & remediation
Site conditions & market — Williamson County
County-level intelligence for this site's location — the power economics, water, hazard, connectivity, and workforce a developer screens before ever visiting. Assembled from FEMA NRI, BLS QCEW, FCC BDC, USGS water-use, and EIA.
Market & workforce
Power economics & interconnection
Water & cooling
Hazard, flood & connectivity
County-level context — address-level utility offerings and flood zoning vary within the county. Confirm site-specific service with the utility and a Phase I ESA.
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Track Marion
Get an email when its DC-readiness score, available capacity, or interconnection-queue status changes.
Nearby datacenter candidate sites
Scored candidate sites near Marion, ranked by DC Readiness.
| Site | Type | State | County | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|---|---|
| WEST FRANKFORT EAST | Substation-Adjacent | IL | Franklin County | 345 kV | 600 MW | 3.8 yrs | 62.9 |
| OZ Johnson | Greenfield | IL | Johnson | — | — | 4.6 yrs | 61.4 |
| WEST FRANKFORT | Substation-Adjacent | IL | Franklin County | 230 kV | 300 MW | 3.8 yrs | 61.2 |
| EC Coal Saline County | Greenfield | IL | Saline County | — | — | 4.6 yrs | 60.4 |
| EC Coal Johnson County | Greenfield | IL | Johnson County | — | — | 4.6 yrs | 60.3 |
| UNKNOWN121869 | Substation-Adjacent | IL | Massac County | 161 kV | 100 MW | 3.8 yrs | 59.8 |
| EC FFE Williamson County | Greenfield | IL | Williamson County | — | — | 4.6 yrs | 59.8 |
| EC Coal Williamson County | Greenfield | IL | Williamson County | — | — | 4.6 yrs | 59.8 |
Nearby internet exchanges
- Quad State Internet PAH1 ColocationPaducah, KY · 9 networks
- Quad State Internet METRO1 ColocationMetropolis, IL · 1 networks
See all datacenter sites in Illinois →
Dataset updated . Screening estimates derived from public data sources.
Brownfield attributes are derived from EIA retired-generator and EPA public data. Existing capacity reflects the retired plant's historical nameplate, not deliverable interconnection for a new load. Confirm reusable interconnection rights, remediation status, and site availability with the utility, ISO, and current owner.
Go deeper than the public screen
This page shows a public slice of the GridCensus dataset for Marion, Marion, Williamson, Illinois. Pro and Enterprise plans unlock the full 147,272-site catalog, raw sub-scores, parcel ownership, interconnection-queue detail, saved searches, and programmatic API access.