MONTGOMERY
SubstationIllinois · UNION ELECTRIC CO - (MO)
MONTGOMERY is an electric transmission substation in Illinois, operated by UNION ELECTRIC CO - (MO). It is classified as extra-high-voltage (500 kv) and connects 10 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 |
|---|---|---|---|---|
| #28349 | 500 kV | — | IN SERVICE | 52.4 mi |
| #29407 | 345 kV | UNION ELECTRIC CO - (MO) | IN SERVICE | 23.3 mi |
| #29569 | 345 kV | UNION ELECTRIC CO - (MO) | IN SERVICE | 27.7 mi |
| #31048 | 345 kV | UNION ELECTRIC CO - (MO) | IN SERVICE | 35.1 mi |
| #49550 | 345 kV | UNION ELECTRIC CO - (MO) | IN SERVICE | 23.3 mi |
| #34534 | 345 kV | UNION ELECTRIC CO - (MO) | IN SERVICE | 49.9 mi |
| #42439 | 345 kV | UNION ELECTRIC CO - (MO) | IN SERVICE | 28.6 mi |
| #31717 | 161 kV | UNION ELECTRIC CO - (MO) | IN SERVICE | 38.1 mi |
| #32563 | 161 kV | UNION ELECTRIC CO - (MO) | IN SERVICE | 17.8 mi |
| #42766 | 161 kV | UNION ELECTRIC CO - (MO) | IN SERVICE | 16.7 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of MONTGOMERY, 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 |
|---|---|---|---|---|---|---|---|
| MONTGOMERY | Substation-Adjacent | MO | Warren County | 500 kV | 1,000 MW | 4.6 yrs | 72.8 |
| TAP140542 | Substation-Adjacent | MO | Montgomery County | 345 kV | 600 MW | 4.6 yrs | 71.5 |
| TAP153235 | Substation-Adjacent | MO | St. Charles County | 345 kV | 600 MW | 4.6 yrs | 70.9 |
| UNKNOWN117765 | Substation-Adjacent | MO | St. Charles County | 345 kV | 600 MW | 4.6 yrs | 69.7 |
| UNKNOWN117941 | Substation-Adjacent | MO | St. Charles County | 161 kV | 100 MW | 4.6 yrs | 69.0 |
| UNKNOWN117937 | Substation-Adjacent | MO | St. Charles County | 138 kV | 100 MW | 4.6 yrs | 68.5 |
| LABADIE | Substation-Adjacent | MO | Franklin County | 345 kV | 600 MW | 4.6 yrs | 68.1 |
| BLAND | Substation-Adjacent | MO | Gasconade County | 345 kV | 600 MW | 4.6 yrs | 67.7 |
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.
Go deeper than the public screen
This page shows a public slice of the GridCensus dataset for MONTGOMERY 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.