TAP138229
SubstationIllinois · COMMONWEALTH EDISON CO
TAP138229 is an electric transmission substation in Illinois, operated by COMMONWEALTH EDISON CO. It is classified as high-voltage (345 kv) and connects 3 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 |
|---|---|---|---|---|
| #25068 | 345 kV | — | IN SERVICE | 103.8 mi |
| #34858 | 345 kV | COMMONWEALTH EDISON CO | IN SERVICE | 0.2 mi |
| #45773 | 345 kV | — | IN SERVICE | 0.0 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP138229, 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 (345 KV) | Substation-Adjacent | IL | Kendall County | 345 kV | 600 MW | 4.6 yrs | 71.3 |
| Greenfield (COLLINS - PLANO (765 KV)) | Greenfield | IL | Kendall County | 765 kV | 1,000 MW | 4.6 yrs | 69.7 |
| COLLINS | Substation-Adjacent | IL | Grundy County | 765 kV | 1,000 MW | 4.6 yrs | 69.5 |
| Greenfield (COLLINS - PLANO (765 KV)) | Greenfield | IL | Kendall County | 765 kV | 1,000 MW | 4.6 yrs | 68.9 |
| Greenfield (COLLINS - PLANO (765 KV)) | Greenfield | IL | Kendall County | 765 kV | 1,000 MW | 4.6 yrs | 68.8 |
| TAP138229 | Substation-Adjacent | IL | LaSalle County | 345 kV | 600 MW | 4.6 yrs | 68.4 |
| DRESDEN STATION | Substation-Adjacent | IL | Grundy County | 345 kV | 600 MW | 4.6 yrs | 67.7 |
| UNKNOWN122023 | Substation-Adjacent | IL | Grundy County | 345 kV | 600 MW | 4.6 yrs | 67.6 |
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 TAP138229 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.