PRAIRIE STATE STATION
SubstationIllinois · AMEREN ILLINOIS COMPANY
PRAIRIE STATE STATION is an electric transmission substation in Illinois, operated by AMEREN ILLINOIS COMPANY. It is classified as high-voltage (345 kv) and connects 6 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 |
|---|---|---|---|---|
| #2684 | 345 kV | AMEREN ILLINOIS COMPANY | IN SERVICE | 39.5 mi |
| #29929 | 345 kV | AMEREN ILLINOIS COMPANY | IN SERVICE | 0.1 mi |
| #35389 | 345 kV | AMEREN ILLINOIS COMPANY | IN SERVICE | 0.1 mi |
| #43867 | 345 kV | AMEREN ILLINOIS COMPANY | IN SERVICE | 13.9 mi |
| #49093 | 345 kV | AMEREN ILLINOIS COMPANY | IN SERVICE | 13.0 mi |
| #62341 | 345 kV | AMEREN ILLINOIS COMPANY | IN SERVICE | 38.1 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of PRAIRIE STATE STATION, 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 |
|---|---|---|---|---|---|---|---|
| TURKEY HILL | Substation-Adjacent | IL | St. Clair County | 345 kV | 600 MW | 4.6 yrs | 71.9 |
| PINCKNEYVILLE | Substation-Adjacent | IL | Perry County | 230 kV | 300 MW | 4.6 yrs | 71.6 |
| UNKNOWN139507 | Substation-Adjacent | IL | Washington County | 345 kV | 600 MW | 4.6 yrs | 69.4 |
| PINCKNEYVILLE STATION | Substation-Adjacent | IL | Perry County | 230 kV | 300 MW | 4.6 yrs | 69.2 |
| TAP139468 | Substation-Adjacent | IL | Perry County | 230 kV | 300 MW | 4.6 yrs | 69.0 |
| PORTER RD | Substation-Adjacent | IL | St. Clair County | 138 kV | 100 MW | 4.6 yrs | 68.3 |
| TAP156135 | Substation-Adjacent | IL | St. Clair County | 138 kV | 100 MW | 4.6 yrs | 68.1 |
| PRAIRIE STATE STATION | Substation-Adjacent | IL | Washington County | 345 kV | 600 MW | 4.6 yrs | 67.3 |
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 PRAIRIE STATE STATION 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.