MOSS SWITCHYARD
SubstationTexas · ONCOR ELECTRIC DELIVERY CO.
At a glance
MOSS SWITCHYARD is an electric transmission substation in Texas, on ONCOR ELECTRIC DELIVERY CO.'s transmission network. It is classified as high-voltage (345 kv) and connects 10 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 |
|---|---|---|---|---|
| #309623 | 345 kV | ONCOR ELECTRIC DELIVERY CO. | IN SERVICE | 25.0 mi |
| #307616 | 345 kV | ONCOR ELECTRIC DELIVERY CO. | IN SERVICE | 16.0 mi |
| #304160 | 138 kV | ONCOR ELECTRIC DELIVERY CO. | IN SERVICE | 25.0 mi |
| #306268 | 138 kV | ONCOR ELECTRIC DELIVERY CO. | IN SERVICE | 13.4 mi |
| #306472 | 138 kV | ONCOR ELECTRIC DELIVERY CO. | IN SERVICE | 11.9 mi |
| #307021 | 138 kV | ONCOR ELECTRIC DELIVERY CO. | IN SERVICE | 2.2 mi |
| #307205 | 138 kV | ONCOR ELECTRIC DELIVERY CO. | IN SERVICE | 3.5 mi |
| #300471 | 138 kV | ONCOR ELECTRIC DELIVERY CO. | — | 20.0 mi |
| #311123 | 138 kV | ONCOR ELECTRIC DELIVERY CO. | IN SERVICE | 35.3 mi |
| #301882 | 138 kV | ONCOR ELECTRIC DELIVERY CO. | IN SERVICE | 6.9 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of MOSS SWITCHYARD, 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 |
|---|---|---|---|---|---|---|---|
| MOSS SWITCHYARD | Substation-Adjacent | TX | Ector County | 345 kV | 600 MW | 3.5 yrs | 61.6 |
| UNKNOWN300940 | Substation-Adjacent | TX | Midland County | 345 kV | 600 MW | 3.5 yrs | 61.2 |
| ODESSA | Substation-Adjacent | TX | Ector County | 345 kV | 600 MW | 3.5 yrs | 60.9 |
| UNKNOWN306186 | Substation-Adjacent | TX | Ector County | 345 kV | 600 MW | 3.5 yrs | 60.9 |
| UNKNOWN310183 | Substation-Adjacent | TX | Ector County | 345 kV | 600 MW | 3.5 yrs | 60.9 |
| UNKNOWN304251 | Substation-Adjacent | TX | Martin County | 345 kV | 600 MW | 3.5 yrs | 60.6 |
| UNKNOWN305796 | Substation-Adjacent | TX | Martin County | 345 kV | 600 MW | 3.5 yrs | 60.5 |
| UNKNOWN300550 | Substation-Adjacent | TX | Ector County | 345 kV | 600 MW | 3.5 yrs | 60.4 |
How does MOSS SWITCHYARD 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. 198 named substations in the state are in MOSS SWITCHYARD's 345–499 kV band (14% of named stations). 2 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 MOSS SWITCHYARD?
The 10 connected lines listed above are owned by ONCOR ELECTRIC DELIVERY CO. Line voltages range from 138 kV to 345 kV. Their combined recorded length is about 159.2 miles.
How do candidate sites near MOSS SWITCHYARD score?
The 8 highest-scoring candidate sites within about 25 miles range from 60 to 62 on the 0–100 DC Readiness scale. They fall in Ector County, Midland County, Martin 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 MOSS SWITCHYARD substation?
MOSS SWITCHYARD has a maximum voltage of 345 kV and a minimum of 69 kV. That places it in the 345–499 kV band. The median named US substation in this dataset is 115 kV, so MOSS SWITCHYARD is above the national midpoint.
How many transmission lines connect to MOSS SWITCHYARD substation?
10 transmission lines terminate at or pass through MOSS SWITCHYARD in the HIFLD line data. The connected lines listed here run at 345 kV, 138 kV. Together the listed lines cover about 159.2 miles.
Who owns MOSS SWITCHYARD substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at MOSS SWITCHYARD belong to ONCOR ELECTRIC DELIVERY CO. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is MOSS SWITCHYARD substation located?
MOSS SWITCHYARD is in Texas at 31.8130, -102.4955. The datacenter candidate sites closest to it are in Ector County, Midland County, Martin County.
Are there datacenter candidate sites near MOSS SWITCHYARD substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of MOSS SWITCHYARD. The highest-scoring is MOSS SWITCHYARD at 62/100. Across Texas, the average DC Readiness score is 56.4.
Other 345 kV substations in Texas
- GREENS BAYOU 345· 21 lines
- ROYSE· 17 lines
- CEDAR BAYOU PLANT· 16 lines
- PH ROBINSON· 16 lines
- VENUS· 16 lines
- SKYLINE· 15 lines
- SOTEX5· 15 lines
- PARISH· 14 lines
- All named substations in Texas· 1,426 stations
- Datacenter candidate sites in Texas· 6,839 sites
- Brownfield and retired plant sites in Texas
- Substations by state
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, “MOSS SWITCHYARD substation, Texas”, https://gridcensus.com/substations/texas/moss-switchyard-cf09ab39 (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 MOSS SWITCHYARD 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.