TAZEWELL
SubstationIllinois · AMEREN ILLINOIS COMPANY
TAZEWELL is an electric transmission substation in Illinois, operated by AMEREN ILLINOIS COMPANY. It is classified as high-voltage (345 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 |
|---|---|---|---|---|
| #13651 | 345 kV | AMEREN ILLINOIS COMPANY | IN SERVICE | 8.8 mi |
| #13653 | 345 kV | AMEREN ILLINOIS COMPANY | IN SERVICE | 8.8 mi |
| #25068 | 345 kV | — | IN SERVICE | 103.8 mi |
| #13654 | 345 kV | — | INACTIVE | 0.2 mi |
| #4152 | 345 kV | AMEREN ILLINOIS COMPANY | IN SERVICE | 9.7 mi |
| #34663 | 138 kV | — | IN SERVICE | 6.2 mi |
| #13652 | 138 kV | AMEREN ILLINOIS COMPANY | IN SERVICE | 9.2 mi |
| #23665 | 138 kV | AMEREN ILLINOIS COMPANY | IN SERVICE | 15.1 mi |
| #24599 | 138 kV | AMEREN ILLINOIS COMPANY | IN SERVICE | 11.0 mi |
| #34329 | 138 kV | AMEREN ILLINOIS COMPANY | IN SERVICE | 4.7 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAZEWELL, 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 |
|---|---|---|---|---|---|---|---|
| FARGO 345 KV | Substation-Adjacent | IL | Peoria County | 345 kV | 600 MW | 1.4 yrs | 76.1 |
| RISER159738 | Substation-Adjacent | IL | Tazewell County | 345 kV | 600 MW | 4.6 yrs | 75.8 |
| DEADEND167139 | Substation-Adjacent | IL | Tazewell County | 345 kV | 600 MW | 4.6 yrs | 73.9 |
| TAZEWELL | Substation-Adjacent | IL | Tazewell County | 345 kV | 600 MW | 4.6 yrs | 73.7 |
| RISER159739 | Substation-Adjacent | IL | Tazewell County | 345 kV | 600 MW | 4.6 yrs | 72.7 |
| UNKNOWN123092 | Substation-Adjacent | IL | Peoria County | 138 kV | 100 MW | 4.6 yrs | 72.0 |
| UNKNOWN122930 | Substation-Adjacent | IL | Tazewell County | 138 kV | 100 MW | 4.6 yrs | 71.4 |
| UNKNOWN123082 | Substation-Adjacent | IL | Peoria County | 138 kV | 100 MW | 4.6 yrs | 71.0 |
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 TAZEWELL 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.