TAP168794
SubstationIllinois · AMEREN ILLINOIS COMPANY
At a glance
TAP168794 is an electric transmission substation in Illinois, on AMEREN ILLINOIS COMPANY's transmission network. It is classified as unclassified and connects 2 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 |
|---|---|---|---|---|
| #170277 | 69 kV | AMEREN ILLINOIS COMPANY | IN SERVICE | 1.3 mi |
| #170278 | 69 kV | AMEREN ILLINOIS COMPANY | IN SERVICE | 4.4 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP168794, 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 |
|---|---|---|---|---|---|---|---|
| WEST FRANKFORT EAST | Substation-Adjacent | IL | Franklin County | 345 kV | 600 MW | 4.8 yrs | 62.4 |
| WEST FRANKFORT | Substation-Adjacent | IL | Franklin County | 230 kV | 300 MW | 4.8 yrs | 60.8 |
| OZ Saline | Greenfield | IL | Saline | — | — | 4.8 yrs | 60.5 |
| EC Coal Saline County | Greenfield | IL | Saline County | — | — | 4.8 yrs | 60.4 |
| EC Coal Saline County | Greenfield | IL | Saline County | — | — | 4.8 yrs | 60.4 |
| EC Coal Johnson County | Greenfield | IL | Johnson County | — | — | 4.8 yrs | 60.3 |
| EC Coal Williamson County | Greenfield | IL | Williamson County | — | — | 4.8 yrs | 59.9 |
| EC FFE Williamson County | Greenfield | IL | Williamson County | — | — | 4.8 yrs | 59.8 |
Who owns the transmission lines at TAP168794?
The 2 connected lines listed above are owned by AMEREN ILLINOIS COMPANY. Line voltages range from 69 kV to 69 kV. Their combined recorded length is about 5.6 miles.
How do candidate sites near TAP168794 score?
The 8 highest-scoring candidate sites within about 25 miles range from 60 to 62 on the 0–100 DC Readiness scale. They fall in Franklin County, Saline, Saline County, Johnson County. The Illinois average across 3,641 scored sites is 54.3. 795 of those Illinois sites are classed as substation sites (candidate locations generated at an existing substation).
Frequently asked questions
How many transmission lines connect to TAP168794 substation?
2 transmission lines terminate at or pass through TAP168794 in the HIFLD line data. The connected lines listed here run at 69 kV. Together the listed lines cover about 5.6 miles.
Who owns TAP168794 substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at TAP168794 belong to AMEREN ILLINOIS COMPANY. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is TAP168794 substation located?
TAP168794 is in Illinois at 37.8492, -88.8354. The datacenter candidate sites closest to it are in Franklin County, Saline, Saline County.
Are there datacenter candidate sites near TAP168794 substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of TAP168794. The highest-scoring is WEST FRANKFORT EAST at 62/100. Across Illinois, the average DC Readiness score is 54.3.
More in Illinois
About this data
Source: HIFLD Electric Substations and Transmission Lines (U.S. Department of Homeland Security), as published June 29, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: GridCensus, “TAP168794 substation, Illinois”, https://gridcensus.com/substations/illinois/tap168794-6816d4e2 (data as of June 29, 2026).
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
Every site and score for TAP168794 substation, Illinois is free to browse. Pro adds Watchtower on 25 sites, alerts when new candidate sites, datacenters or interconnection-queue requests appear in your markets, score and capacity history, and CSV export. Enterprise adds team seats, weekly data files for all 147,272 sites, the REST API and an MCP server for AI tools.