TAP138821
SubstationKansas · WESTAR ENERGY INC
At a glance
TAP138821 is an electric transmission substation in Kansas, on WESTAR ENERGY INC's transmission network. It is classified as sub-transmission (115 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 |
|---|---|---|---|---|
| #106773 | 115 kV | WESTAR ENERGY INC | IN SERVICE | 3.3 mi |
| #135642 | 115 kV | WESTAR ENERGY INC | IN SERVICE | 2.8 mi |
| #144737 | 115 kV | WESTAR ENERGY INC | IN SERVICE | 0.0 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP138821, 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 |
|---|---|---|---|---|---|---|---|
| HAWTHORNE | Substation-Adjacent | MO | Jackson County | 345 kV | 600 MW | 4.3 yrs | 70.2 |
| CRAIG | Substation-Adjacent | KS | Johnson County | 345 kV | 600 MW | 4.3 yrs | 67.6 |
| UNKNOWN117601 | Substation-Adjacent | MO | Cass County | 345 kV | 600 MW | 4.3 yrs | 67.4 |
| UNKNOWN118616 | Substation-Adjacent | KS | Johnson County | 345 kV | 600 MW | 4.3 yrs | 67.2 |
| EC Near Grand Avenue | Greenfield | MO | Jackson | — | — | 4.3 yrs | 67.0 |
| OZ Jackson | Greenfield | MO | Jackson | — | — | 4.3 yrs | 66.7 |
| EC Near Grand Avenue | Greenfield | MO | Jackson | — | — | 4.3 yrs | 66.7 |
| OZ Jackson | Greenfield | MO | Jackson | — | — | 4.3 yrs | 66.6 |
Who owns the transmission lines at TAP138821?
The 3 connected lines listed above are owned by WESTAR ENERGY INC. Line voltages range from 115 kV to 115 kV. Their combined recorded length is about 6.1 miles.
How do candidate sites near TAP138821 score?
The 8 highest-scoring candidate sites within about 25 miles range from 67 to 70 on the 0–100 DC Readiness scale. They fall in Jackson County, Johnson County, Cass County, Jackson. The Kansas average across 2,352 scored sites is 53.2. 730 of those Kansas sites are classed as substation sites (candidate locations generated at an existing substation).
Frequently asked questions
What voltage is TAP138821 substation?
TAP138821 has a maximum voltage of 115 kV. That places it in the 115–229 kV band. The median named US substation in this dataset is 115 kV, so TAP138821 is at the national midpoint.
How many transmission lines connect to TAP138821 substation?
3 transmission lines terminate at or pass through TAP138821 in the HIFLD line data. The connected lines listed here run at 115 kV. Together the listed lines cover about 6.1 miles.
Who owns TAP138821 substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at TAP138821 belong to WESTAR ENERGY INC. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is TAP138821 substation located?
TAP138821 is in Kansas at 39.0324, -94.8346. The datacenter candidate sites closest to it are in Jackson County, Johnson County, Cass County.
Are there datacenter candidate sites near TAP138821 substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of TAP138821. The highest-scoring is HAWTHORNE at 70/100. Across Kansas, the average DC Readiness score is 53.2.
More in Kansas
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, “TAP138821 substation, Kansas”, https://gridcensus.com/substations/kansas/tap138821-086bdf96 (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 TAP138821 substation, Kansas 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.