DALLAM
SubstationTexas · RITA BLANCA ELECTRIC COOP, INC
At a glance
DALLAM is an electric transmission substation in Texas, on RITA BLANCA ELECTRIC COOP, INC's transmission network. It is classified as sub-transmission (115 kv) and connects 6 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 |
|---|---|---|---|---|
| #310668 | 138 kV | SOUTHWESTERN PUBLIC SERVICE CO. | IN SERVICE | 1.5 mi |
| #302620 | 115 kV | SOUTHWESTERN PUBLIC SERVICE CO. | IN SERVICE | 1.7 mi |
| #303106 | 115 kV | RITA BLANCA ELECTRIC COOP, INC | IN SERVICE | 33.4 mi |
| #300996 | 69 kV | RITA BLANCA ELECTRIC COOP, INC | IN SERVICE | 37.3 mi |
| #302850 | 69 kV | SOUTHWESTERN ELECTRIC COOPERATIVE | IN SERVICE | 40.3 mi |
| #313465 | 69 kV | SOUTHWESTERN ELECTRIC COOPERATIVE | IN SERVICE | 31.6 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of DALLAM, 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 |
|---|---|---|---|---|---|---|---|
| CHANNING | Substation-Adjacent | TX | Hartley County | 115 kV | 100 MW | 3.5 yrs | 56.3 |
| XIT | Substation-Adjacent | TX | Dallam County | 138 kV | 100 MW | 3.5 yrs | 56.0 |
| TAP310563 | Substation-Adjacent | TX | Sherman County | 115 kV | 100 MW | 3.5 yrs | 55.7 |
| TAP305387 | Substation-Adjacent | TX | Dallam County | 115 kV | 100 MW | 3.5 yrs | 55.6 |
| DALLAM | Substation-Adjacent | TX | Dallam County | 115 kV | 100 MW | 3.5 yrs | 55.5 |
| UNKNOWN307743 | Substation-Adjacent | TX | Dallam County | 115 kV | 100 MW | 3.5 yrs | 55.0 |
| UNKNOWN301915 | Substation-Adjacent | TX | Dallam County | 115 kV | 100 MW | 3.5 yrs | 54.9 |
| RB HOGUE TAP | Substation-Adjacent | TX | Hartley County | 69 kV | 50 MW | 3.5 yrs | 52.9 |
How does DALLAM 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 DALLAM'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 DALLAM?
The 6 connected lines listed above are owned by SOUTHWESTERN PUBLIC SERVICE CO., RITA BLANCA ELECTRIC COOP, INC, SOUTHWESTERN ELECTRIC COOPERATIVE. Line voltages range from 69 kV to 138 kV. Their combined recorded length is about 145.8 miles.
How do candidate sites near DALLAM score?
The 8 highest-scoring candidate sites within about 25 miles range from 53 to 56 on the 0–100 DC Readiness scale. They fall in Hartley County, Dallam County, Sherman 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 DALLAM substation?
DALLAM 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 DALLAM is at the national midpoint.
How many transmission lines connect to DALLAM substation?
6 transmission lines terminate at or pass through DALLAM in the HIFLD line data. The connected lines listed here run at 138 kV, 115 kV, 69 kV. Together the listed lines cover about 145.8 miles.
Who owns DALLAM substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at DALLAM belong to RITA BLANCA ELECTRIC COOP, INC, and others to SOUTHWESTERN ELECTRIC COOPERATIVE, SOUTHWESTERN PUBLIC SERVICE CO. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is DALLAM substation located?
DALLAM is in Texas at 36.0804, -102.5317. The datacenter candidate sites closest to it are in Hartley County, Dallam County, Sherman County.
Are there datacenter candidate sites near DALLAM substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of DALLAM. The highest-scoring is CHANNING at 56/100. 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, “DALLAM substation, Texas”, https://gridcensus.com/substations/texas/dallam-2196dfcc (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 DALLAM 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.