TAUM SAUK
SubstationIllinois · UNION ELECTRIC CO - (MO)
TAUM SAUK is an electric transmission substation in Illinois, operated by UNION ELECTRIC CO - (MO). It is classified as sub-transmission (138 kv) and connects 5 transmission lines. Substation proximity is one of the strongest speed-to-power signals for siting a datacenter — interconnection distance to an energized, high-voltage bus is often the binding constraint on time-to-energization.
Voltage & classification
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #5636 | 138 kV | UNION ELECTRIC CO - (MO) | IN SERVICE | 29.9 mi |
| #22750 | 138 kV | UNION ELECTRIC CO - (MO) | IN SERVICE | 29.9 mi |
| #27420 | 138 kV | UNION ELECTRIC CO - (MO) | — | 0.1 mi |
| #45314 | 138 kV | UNION ELECTRIC CO - (MO) | IN SERVICE | 13.8 mi |
| #53631 | 138 kV | UNION ELECTRIC CO - (MO) | IN SERVICE | 2.9 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAUM SAUK, ranked by DC Readiness. Sites this close to an energized substation carry a strong speed-to-power advantage.
| Site | Type | State | County | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|---|---|
| ST FRANCOIS | Substation-Adjacent | MO | St. Francois County | 345 kV | 600 MW | 4.6 yrs | 66.4 |
| UNKNOWN117859 | Substation-Adjacent | MO | St. Francois County | 138 kV | 100 MW | 4.6 yrs | 65.1 |
| UNKNOWN121834 | Substation-Adjacent | MO | St. Francois County | 138 kV | 100 MW | 4.6 yrs | 64.5 |
| TAP139472 | Substation-Adjacent | MO | St. Francois County | 138 kV | 100 MW | 4.6 yrs | 64.3 |
| Greenfield (LUTESVILLE - ST FRANCOIS) | Greenfield | MO | St. Francois County | 345 kV | 600 MW | 4.6 yrs | 64.0 |
| Greenfield (LUTESVILLE - ST FRANCOIS) | Greenfield | MO | St. Francois County | 345 kV | 600 MW | 4.6 yrs | 63.6 |
| TAP153680 | Substation-Adjacent | MO | Reynolds County | 345 kV | 600 MW | 4.6 yrs | 63.3 |
| RIVERMINE | Substation-Adjacent | MO | St. Francois County | 138 kV | 100 MW | 4.6 yrs | 62.8 |
Dataset updated . Screening estimates derived from public data sources.
Substation attributes are derived from public HIFLD / EIA infrastructure data and may lag real-world upgrades or retirements. Voltage and connected-line counts are screening figures — confirm available capacity and interconnection terms directly with the operating utility and ISO.
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This page shows a public slice of the GridCensus dataset for TAUM SAUK substation, Illinois. Pro and Enterprise plans unlock the full 164,098-site catalog, raw sub-scores, parcel ownership, interconnection-queue detail, saved searches, and programmatic API access.