MASON
Substation-AdjacentSt. Louis County, Missouri · MISO
MASON is a substation-adjacent datacenter candidate site in St. Louis County, Missouri, interconnecting through MISO. It screens at 66.6/100 DC Readiness with a catalogued 600 MW of candidate capacity and a 2.8 yrs average interconnection-queue wait.
Power & interconnection
Speed to power
Shorter queues and healthier completion here — a faster path to energization than the national norm.
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
Get alerts
Track MASON
Get an email when its DC-readiness score, available capacity, or interconnection-queue status changes.
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 |
|---|---|---|---|---|---|
| UNKNOWN117706 | Substation-Adjacent | 345 kV | 600 MW | 2.8 yrs | 65.5 |
| TYSON | Substation-Adjacent | 345 kV | 600 MW | 2.8 yrs | 65.4 |
| EC Near Howard Bend | Greenfield | — | — | 1.4 yrs | 65.3 |
| OZ St. Louis | Greenfield | — | — | 1.4 yrs | 64.5 |
| OZ St. Louis | Greenfield | — | — | 1.4 yrs | 64.3 |
| OZ St. Louis | Greenfield | — | — | 1.4 yrs | 64.0 |
| OZ St. Louis | Greenfield | — | — | 1.4 yrs | 63.7 |
| EC Coal St. Louis County | Greenfield | — | — | 1.4 yrs | 62.8 |
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.
Go deeper than the public screen
This page shows a public slice of the GridCensus dataset for MASON, St. Louis County. 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.