TAP153686
SubstationIllinois · AMEREN ILLINOIS COMPANY
At a glance
TAP153686 is an electric transmission substation in Illinois, on AMEREN ILLINOIS COMPANY's transmission network. 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 |
|---|---|---|---|---|
| #123417 | 138 kV | AMEREN ILLINOIS COMPANY | IN SERVICE | 0.0 mi |
| #124336 | 138 kV | AMEREN ILLINOIS COMPANY | IN SERVICE | 0.8 mi |
| #130208 | 138 kV | AMEREN ILLINOIS COMPANY | IN SERVICE | 20.8 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP153686, 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 |
|---|---|---|---|---|---|---|---|
| JOPPA 345 | Substation-Adjacent | IL | Massac County | 345 kV | 600 MW | 4.8 yrs | 65.5 |
| EC Coal Ballard County | Greenfield | KY | Ballard County | — | — | 4.3 yrs | 61.5 |
| KELSO | Substation-Adjacent | MO | Scott County | 345 kV | 600 MW | 4.3 yrs | 61.5 |
| OZ Johnson | Greenfield | IL | Johnson | — | — | 4.8 yrs | 61.4 |
| EC Near Shawnee | Greenfield | KY | McCracken | — | — | 4.3 yrs | 61.2 |
| UNKNOWN122848 | Substation-Adjacent | KY | McCracken County | 69 kV | 50 MW | 3.9 yrs | 60.2 |
| 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 TAP153686?
The 3 connected lines listed above are owned by AMEREN ILLINOIS COMPANY. Line voltages range from 138 kV to 138 kV. Their combined recorded length is about 21.5 miles.
How do candidate sites near TAP153686 score?
The 8 highest-scoring candidate sites within about 25 miles range from 60 to 66 on the 0–100 DC Readiness scale. They fall in Massac County, Ballard County, Scott County, Johnson. 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
What voltage is TAP153686 substation?
TAP153686 has a maximum voltage of 138 kV. That places it in the 115–229 kV band. The median named US substation in this dataset is 115 kV, so TAP153686 is above the national midpoint.
How many transmission lines connect to TAP153686 substation?
3 transmission lines terminate at or pass through TAP153686 in the HIFLD line data. The connected lines listed here run at 138 kV. Together the listed lines cover about 21.5 miles.
Who owns TAP153686 substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at TAP153686 belong to AMEREN ILLINOIS COMPANY. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is TAP153686 substation located?
TAP153686 is in Illinois at 37.4695, -89.2309. The datacenter candidate sites closest to it are in Massac County, Ballard County, Scott County.
Are there datacenter candidate sites near TAP153686 substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of TAP153686. The highest-scoring is JOPPA 345 at 66/100. 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, “TAP153686 substation, Illinois”, https://gridcensus.com/substations/illinois/tap153686-bdcd0860 (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 TAP153686 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.