TAP305404
SubstationTexas · UPSHUR RURAL ELEC COOP CORP
At a glance
TAP305404 is an electric transmission substation in Texas, on UPSHUR RURAL ELEC COOP CORP'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 |
|---|---|---|---|---|
| #304373 | 138 kV | UPSHUR RURAL ELEC COOP CORP | IN SERVICE | 1.3 mi |
| #311100 | 138 kV | UPSHUR RURAL ELEC COOP CORP | IN SERVICE | 6.7 mi |
| #311598 | 138 kV | UPSHUR RURAL ELEC COOP CORP | IN SERVICE | 1.0 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP305404, 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 |
|---|---|---|---|---|---|---|---|
| MARTIN LAKES | Substation-Adjacent | TX | Rusk County | 345 kV | 600 MW | 3.5 yrs | 64.8 |
| PIRKEY | Substation-Adjacent | TX | Harrison County | 345 kV | 600 MW | 3.5 yrs | 64.0 |
| UNKNOWN305499 | Substation-Adjacent | TX | Marion County | 345 kV | 600 MW | 3.5 yrs | 61.9 |
| UNKNOWN304791 | Substation-Adjacent | TX | Marion County | 345 kV | 600 MW | 3.5 yrs | 61.8 |
| UNKNOWN301472 | Substation-Adjacent | TX | Harrison County | 345 kV | 600 MW | 3.5 yrs | 61.4 |
| UNKNOWN309941 | Substation-Adjacent | TX | Harrison County | 345 kV | 600 MW | 3.5 yrs | 61.4 |
| DIANA | Substation-Adjacent | TX | Upshur County | 345 kV | 600 MW | 3.5 yrs | 61.3 |
| EC Near Pirkey | Greenfield | TX | Harrison | — | — | 3.5 yrs | 60.4 |
Who owns the transmission lines at TAP305404?
The 3 connected lines listed above are owned by UPSHUR RURAL ELEC COOP CORP. Line voltages range from 138 kV to 138 kV. Their combined recorded length is about 8.9 miles.
How do candidate sites near TAP305404 score?
The 8 highest-scoring candidate sites within about 25 miles range from 60 to 65 on the 0–100 DC Readiness scale. They fall in Rusk County, Harrison County, Marion County, Upshur County. The Texas average across 6,839 scored sites is 56.4. 3,635 of those Texas sites are classed as substation sites (candidate locations generated at an existing substation).
Frequently asked questions
What voltage is TAP305404 substation?
TAP305404 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 TAP305404 is above the national midpoint.
How many transmission lines connect to TAP305404 substation?
3 transmission lines terminate at or pass through TAP305404 in the HIFLD line data. The connected lines listed here run at 138 kV. Together the listed lines cover about 8.9 miles.
Who owns TAP305404 substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at TAP305404 belong to UPSHUR RURAL ELEC COOP CORP. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is TAP305404 substation located?
TAP305404 is in Texas at 32.4769, -94.4773. The datacenter candidate sites closest to it are in Rusk County, Harrison County, Marion County.
Are there datacenter candidate sites near TAP305404 substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of TAP305404. The highest-scoring is MARTIN LAKES at 65/100. Across Texas, the average DC Readiness score is 56.4.
More in Texas
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, “TAP305404 substation, Texas”, https://gridcensus.com/substations/texas/tap305404-1ae61306 (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 TAP305404 substation, Texas 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.