UNKNOWN122495
Substation-AdjacentSt. Louis County, Illinois · MISO
UNKNOWN122495 is a substation-adjacent datacenter candidate site in St. Louis County, Illinois, interconnecting through MISO. It screens at 60.5/100 DC Readiness with a catalogued 100 MW of candidate capacity and a 4.8 yrs average interconnection-queue wait.
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: Qualified data center sales tax exemption (2019 law); state income tax credits.
Site location
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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 St. Louis County, ranked by DC Readiness.
| Site | Type | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|
| American Bottoms Solar Project | Brownfield | 345 kV | 2 MW | 4.3 yrs | 69.4 |
| CAHOKIA | Substation-Adjacent | 345 kV | 600 MW | 4.8 yrs | 67.6 |
| UNKNOWN117735 | Substation-Adjacent | 345 kV | 600 MW | 4.3 yrs | 67.0 |
| TAP139481 | Substation-Adjacent | 345 kV | 600 MW | 4.8 yrs | 66.6 |
| UNKNOWN121705 | Substation-Adjacent | 138 kV | 100 MW | 4.8 yrs | 65.9 |
| OZ St. Louis | Greenfield | — | — | 4.3 yrs | 65.1 |
| OZ St. Louis | Greenfield | — | — | 4.3 yrs | 64.9 |
| OZ St. Louis | Greenfield | — | — | 4.3 yrs | 64.5 |
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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