JOLIET
SubstationIllinois
JOLIET is an electric transmission substation in Illinois. It is classified as high-voltage (345 kv) and connects 9 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
Ownership & operation
Operator not catalogued for this substation.
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #33269 | 345 kV | — | IN SERVICE | 13.7 mi |
| #21554 | 345 kV | — | IN SERVICE | 13.7 mi |
| #39769 | 138 kV | — | IN SERVICE | 3.7 mi |
| #40900 | 138 kV | — | IN SERVICE | 0.3 mi |
| #46929 | 138 kV | — | IN SERVICE | 0.3 mi |
| #47748 | 138 kV | — | IN SERVICE | 12.1 mi |
| #2838 | 138 kV | — | IN SERVICE | 1.9 mi |
| #64810 | 138 kV | — | — | 0.0 mi |
| #6236 | 138 kV | — | IN SERVICE | 1.1 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of JOLIET, 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 |
|---|---|---|---|---|---|---|---|
| PLANO (765 KV) | Substation-Adjacent | IL | Kendall County | 765 kV | 1,000 MW | 4.6 yrs | 78.7 |
| UNKNOWN124436 | Substation-Adjacent | IL | Cook County | 345 kV | 600 MW | 2.2 yrs | 78.0 |
| UNKNOWN122269 | Substation-Adjacent | IL | Cook County | 345 kV | 600 MW | 2.2 yrs | 76.8 |
| TAP160103 | Substation-Adjacent | IL | Cook County | 345 kV | 600 MW | 2.2 yrs | 76.6 |
| PLANO (345 KV) | Substation-Adjacent | IL | DuPage County | 345 kV | 600 MW | 2.2 yrs | 76.4 |
| ELECTRIC LIGHT 345 KV | Substation-Adjacent | IL | DuPage County | 345 kV | 600 MW | 2.2 yrs | 76.2 |
| ELMHURST | Substation-Adjacent | IL | DuPage County | 345 kV | 600 MW | 2.2 yrs | 76.2 |
| UNKNOWN122289 | Substation-Adjacent | IL | DuPage County | 345 kV | 600 MW | 2.2 yrs | 76.1 |
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 JOLIET 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.