TAP307949
SubstationTexas · SOUTHWESTERN PUBLIC SERVICE CO.
At a glance
TAP307949 is an electric transmission substation in Texas, on SOUTHWESTERN PUBLIC SERVICE CO.'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
Ownership
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #303330 | 115 kV | SOUTHWESTERN PUBLIC SERVICE CO. | IN SERVICE | 2.7 mi |
| #308939 | 115 kV | SOUTHWESTERN PUBLIC SERVICE CO. | IN SERVICE | 0.0 mi |
| #311291 | 115 kV | SOUTHWESTERN PUBLIC SERVICE CO. | IN SERVICE | 28.1 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP307949, 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 |
|---|---|---|---|---|---|---|---|
| POTTER COUNTY | Substation-Adjacent | TX | Potter County | 345 kV | 600 MW | 3.5 yrs | 66.2 |
| HARRINGTON | Substation-Adjacent | TX | Potter County | 230 kV | 300 MW | 3.5 yrs | 64.6 |
| ROLLING HILLS | Substation-Adjacent | TX | Potter County | 230 kV | 300 MW | 3.5 yrs | 64.6 |
| NICHOLS | Substation-Adjacent | TX | Potter County | 230 kV | 300 MW | 3.5 yrs | 64.6 |
| NORTHWEST | Substation-Adjacent | TX | Potter County | 230 kV | 300 MW | 3.5 yrs | 64.5 |
| ALIBATES | Substation-Adjacent | TX | Carson County | 345 kV | 600 MW | 3.5 yrs | 62.6 |
| DAVID SWINFORD | Substation-Adjacent | TX | Carson County | 345 kV | 600 MW | 3.5 yrs | 62.2 |
| JACK RAMEY WIND | Substation-Adjacent | TX | Carson County | 345 kV | 600 MW | 3.5 yrs | 61.8 |
Who owns the transmission lines at TAP307949?
The 3 connected lines listed above are owned by SOUTHWESTERN PUBLIC SERVICE CO. Line voltages range from 115 kV to 115 kV. Their combined recorded length is about 30.8 miles.
How do candidate sites near TAP307949 score?
The 8 highest-scoring candidate sites within about 25 miles range from 62 to 66 on the 0–100 DC Readiness scale. They fall in Potter County, Carson 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 TAP307949 substation?
TAP307949 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 TAP307949 is at the national midpoint.
How many transmission lines connect to TAP307949 substation?
3 transmission lines terminate at or pass through TAP307949 in the HIFLD line data. The connected lines listed here run at 115 kV. Together the listed lines cover about 30.8 miles.
Who owns TAP307949 substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at TAP307949 belong to SOUTHWESTERN PUBLIC SERVICE CO. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is TAP307949 substation located?
TAP307949 is in Texas at 35.6454, -101.5589. The datacenter candidate sites closest to it are in Potter County, Carson County.
Are there datacenter candidate sites near TAP307949 substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of TAP307949. The highest-scoring is POTTER COUNTY at 66/100. 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, “TAP307949 substation, Texas”, https://gridcensus.com/substations/texas/tap307949-5f147167 (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 TAP307949 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.