PLANO (138 KV)
SubstationIllinois · COMMONWEALTH EDISON CO
PLANO (138 KV) is an electric transmission substation in Illinois, operated by COMMONWEALTH EDISON CO. It is classified as sub-transmission (138 kv) and connects 4 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 |
|---|---|---|---|---|
| #39337 | 138 kV | COMMONWEALTH EDISON CO | IN SERVICE | 9.7 mi |
| #40093 | 138 kV | — | IN SERVICE | 3.3 mi |
| #44007 | 138 kV | — | IN SERVICE | 0.3 mi |
| #44109 | 138 kV | — | IN SERVICE | 0.9 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of PLANO (138 KV), 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 |
| 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 |
| TAP137936 | Substation-Adjacent | IL | Kane County | 345 kV | 600 MW | 2.2 yrs | 76.1 |
| TOLLWAY | Substation-Adjacent | IL | Kane County | 345 kV | 600 MW | 2.2 yrs | 76.0 |
| JOLIET 29 | Substation-Adjacent | IL | Will County | 345 kV | 600 MW | 4.6 yrs | 76.0 |
| UNKNOWN122220 | Substation-Adjacent | IL | DuPage County | 345 kV | 600 MW | 2.2 yrs | 75.0 |
| TAP138227 | Substation-Adjacent | IL | Kendall County | 345 kV | 600 MW | 4.6 yrs | 74.4 |
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 PLANO (138 KV) 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.