SPEARMAN CITY
SubstationTexas · SOUTHWESTERN PUBLIC SERVICE CO.
At a glance
SPEARMAN CITY 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 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
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 |
|---|---|---|---|---|
| #303411 | 115 kV | SOUTHWESTERN PUBLIC SERVICE CO. | IN SERVICE | 8.5 mi |
| #303531 | 115 kV | SOUTHWESTERN PUBLIC SERVICE CO. | IN SERVICE | 17.4 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of SPEARMAN CITY, 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 |
|---|---|---|---|---|---|---|---|
| GRUVER | Substation-Adjacent | TX | Hansford County | 345 kV | 600 MW | 3.5 yrs | 60.4 |
| HITCHLAND | Substation-Adjacent | TX | Hansford County | 345 kV | 600 MW | 3.5 yrs | 60.3 |
| PRINGLE | Substation-Adjacent | TX | Hutchinson County | 230 kV | 300 MW | 3.5 yrs | 59.8 |
| UNKNOWN148745 | Substation-Adjacent | OK | Ochiltree County | 345 kV | 600 MW | 4.3 yrs | 58.9 |
| BEAVER COUNTY | Substation-Adjacent | OK | Ochiltree County | 345 kV | 600 MW | 4.3 yrs | 58.7 |
| TAP307976 | Substation-Adjacent | TX | Texas County | 115 kV | 100 MW | 3.5 yrs | 57.1 |
| SPEARMAN CITY | Substation-Adjacent | TX | Hansford County | 115 kV | 100 MW | 3.5 yrs | 55.3 |
| PERRYTON | Substation-Adjacent | TX | Ochiltree County | 115 kV | 100 MW | 3.5 yrs | 55.3 |
How does SPEARMAN CITY compare with other substations in Texas?
Texas has 4,939 substation records in HIFLD, of which 1,426 carry a station name; the rest are unnamed tap points, risers and line ends. 1,020 named substations in the state are in SPEARMAN CITY's 115–229 kV band (72% of named stations). 236 sit in a higher band. 200 named substations in Texas operate at 345 kV or above. The highest voltage recorded in the state is 500 kV, and the state median is 138 kV.
Who owns the transmission lines at SPEARMAN CITY?
The 2 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 25.9 miles.
How do candidate sites near SPEARMAN CITY score?
The 8 highest-scoring candidate sites within about 25 miles range from 55 to 60 on the 0–100 DC Readiness scale. They fall in Hansford County, Hutchinson County, Ochiltree County, Texas 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 SPEARMAN CITY substation?
SPEARMAN CITY 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 SPEARMAN CITY is at the national midpoint.
How many transmission lines connect to SPEARMAN CITY substation?
2 transmission lines terminate at or pass through SPEARMAN CITY in the HIFLD line data. The connected lines listed here run at 115 kV. Together the listed lines cover about 25.9 miles.
Who owns SPEARMAN CITY substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at SPEARMAN CITY belong to SOUTHWESTERN PUBLIC SERVICE CO. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is SPEARMAN CITY substation located?
SPEARMAN CITY is in Texas at 36.2044, -101.1903. The datacenter candidate sites closest to it are in Hansford County, Hutchinson County, Ochiltree County.
Are there datacenter candidate sites near SPEARMAN CITY substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of SPEARMAN CITY. The highest-scoring is GRUVER at 60/100. Across Texas, the average DC Readiness score is 56.4.
Other 115 kV substations 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, “SPEARMAN CITY substation, Texas”, https://gridcensus.com/substations/texas/spearman-city-575f4d41 (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 SPEARMAN CITY 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.