TURKEY HILL
SubstationIllinois · AMEREN ILLINOIS COMPANY
TURKEY HILL is an electric transmission substation in Illinois, operated by AMEREN ILLINOIS COMPANY. It is classified as high-voltage (345 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 |
|---|---|---|---|---|
| #26251 | 345 kV | AMEREN ILLINOIS COMPANY | IN SERVICE | 20.8 mi |
| #55687 | 345 kV | AMEREN ILLINOIS COMPANY | IN SERVICE | 18.9 mi |
| #7419 | 138 kV | AMEREN ILLINOIS COMPANY | IN SERVICE | 2.3 mi |
| #20072 | 138 kV | AMEREN ILLINOIS COMPANY | IN SERVICE | 8.5 mi |
| #55688 | 138 kV | AMEREN ILLINOIS COMPANY | IN SERVICE | 4.5 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TURKEY HILL, 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 |
|---|---|---|---|---|---|---|---|
| TAP139481 | Substation-Adjacent | MO | St. Louis city | 345 kV | 600 MW | 4.6 yrs | 75.9 |
| UNKNOWN117735 | Substation-Adjacent | MO | St. Louis city | 345 kV | 600 MW | 4.6 yrs | 75.0 |
| CAHOKIA | Substation-Adjacent | MO | St. Louis city | 345 kV | 600 MW | 4.6 yrs | 73.4 |
| STALLINGS | Substation-Adjacent | IL | Madison County | 345 kV | 600 MW | 4.6 yrs | 73.0 |
| UNKNOWN121749 | Substation-Adjacent | IL | Monroe County | 345 kV | 600 MW | 4.6 yrs | 73.0 |
| JARVIS | Substation-Adjacent | IL | Madison County | 345 kV | 600 MW | 4.6 yrs | 72.7 |
| TURKEY HILL | Substation-Adjacent | IL | St. Clair County | 345 kV | 600 MW | 4.6 yrs | 71.9 |
| UNKNOWN117739 | Substation-Adjacent | MO | St. Louis city | 138 kV | 100 MW | 4.6 yrs | 70.9 |
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 TURKEY HILL 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.