TAP122968
SubstationIllinois · TENNESSEE VALLEY AUTHORITY
TAP122968 is an electric transmission substation in Illinois, operated by TENNESSEE VALLEY AUTHORITY. It is classified as sub-transmission (138 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 |
|---|---|---|---|---|
| #43189 | 161 kV | — | IN SERVICE | 21.2 mi |
| #46621 | 161 kV | TENNESSEE VALLEY AUTHORITY | IN SERVICE | 0.3 mi |
| #55829 | 161 kV | — | IN SERVICE | 3.5 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP122968, 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 |
|---|---|---|---|---|---|---|---|
| CUMBERLAND 500KV | Substation-Adjacent | KY | Marshall County | 500 kV | 1,000 MW | 4.6 yrs | 76.5 |
| DOVER | Substation-Adjacent | KY | Lyon County | 161 kV | 100 MW | 4.6 yrs | 67.6 |
| CADIZ | Substation-Adjacent | KY | Trigg County | 161 kV | 100 MW | 4.6 yrs | 67.5 |
| MARSHALL | Substation-Adjacent | KY | Marshall County | 500 kV | 1,000 MW | 4.6 yrs | 67.5 |
| UNKNOWN153828 | Substation-Adjacent | KY | Livingston County | 161 kV | 100 MW | 4.6 yrs | 67.5 |
| Greenfield (MARSHALL - CUMBERLAND 500KV) | Greenfield | KY | Marshall County | 500 kV | 1,000 MW | 4.6 yrs | 67.4 |
| HARDIN | Substation-Adjacent | KY | Marshall County | 161 kV | 100 MW | 3.7 yrs | 67.2 |
| Greenfield (MARSHALL - CUMBERLAND 500KV) | Greenfield | KY | Marshall County | 500 kV | 1,000 MW | 4.6 yrs | 66.9 |
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 TAP122968 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.