LOCKENSBURG
SubstationArkansas · SOUTHWESTERN ELECTRIC POWER CO
At a glance
LOCKENSBURG is an electric transmission substation in Arkansas, on SOUTHWESTERN ELECTRIC POWER CO's transmission network. It is classified as sub-transmission (138 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 |
|---|---|---|---|---|
| #111336 | 138 kV | SOUTHWESTERN ELECTRIC POWER CO | IN SERVICE | 17.5 mi |
| #128477 | 138 kV | SOUTHWESTERN ELECTRIC POWER CO | IN SERVICE | 15.2 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of LOCKENSBURG, 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 |
|---|---|---|---|---|---|---|---|
| UNKNOWN123543 | Substation-Adjacent | AR | Hempstead County | 345 kV | 600 MW | 4.3 yrs | 65.4 |
| OZ Howard | Greenfield | AR | Howard | — | — | 4.3 yrs | 62.4 |
| UNKNOWN108046 | Substation-Adjacent | AR | Hempstead County | 115 kV | 100 MW | 4.3 yrs | 59.4 |
| OKAY | Substation-Adjacent | AR | Hempstead County | 138 kV | 100 MW | 4.3 yrs | 59.3 |
| UNKNOWN121728 | Substation-Adjacent | AR | Hempstead County | 115 kV | 100 MW | 4.3 yrs | 59.2 |
| UNKNOWN108057 | Substation-Adjacent | AR | Howard County | 138 kV | 100 MW | 4.3 yrs | 58.6 |
| EC FFE Sevier County | Greenfield | AR | Sevier County | — | — | 4.3 yrs | 58.0 |
| EC FFE Howard County | Greenfield | AR | Howard County | — | — | 4.3 yrs | 57.9 |
How does LOCKENSBURG compare with other substations in Arkansas?
Arkansas has 1,025 substation records in HIFLD, of which 174 carry a station name; the rest are unnamed tap points, risers and line ends. 104 named substations in the state are in LOCKENSBURG's 115–229 kV band (60% of named stations). 22 sit in a higher band. 17 named substations in Arkansas operate at 345 kV or above. The highest voltage recorded in the state is 500 kV, and the state median is 161 kV.
Who owns the transmission lines at LOCKENSBURG?
The 2 connected lines listed above are owned by SOUTHWESTERN ELECTRIC POWER CO. Line voltages range from 138 kV to 138 kV. Their combined recorded length is about 32.6 miles.
How do candidate sites near LOCKENSBURG score?
The 8 highest-scoring candidate sites within about 25 miles range from 58 to 65 on the 0–100 DC Readiness scale. They fall in Hempstead County, Howard, Howard County, Sevier County. The Arkansas average across 1,651 scored sites is 53.6. 758 of those Arkansas sites are classed as substation sites (candidate locations generated at an existing substation).
Frequently asked questions
What voltage is LOCKENSBURG substation?
LOCKENSBURG 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 LOCKENSBURG is above the national midpoint.
How many transmission lines connect to LOCKENSBURG substation?
2 transmission lines terminate at or pass through LOCKENSBURG in the HIFLD line data. The connected lines listed here run at 138 kV. Together the listed lines cover about 32.6 miles.
Who owns LOCKENSBURG substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at LOCKENSBURG belong to SOUTHWESTERN ELECTRIC POWER CO. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is LOCKENSBURG substation located?
LOCKENSBURG is in Arkansas at 33.8928, -94.1508. The datacenter candidate sites closest to it are in Hempstead County, Howard, Howard County.
Are there datacenter candidate sites near LOCKENSBURG substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of LOCKENSBURG. The highest-scoring is UNKNOWN123543 at 65/100. Across Arkansas, the average DC Readiness score is 53.6.
Other 138 kV substations in Arkansas
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, “LOCKENSBURG substation, Arkansas”, https://gridcensus.com/substations/arkansas/lockensburg-9a3c021a (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 LOCKENSBURG substation, Arkansas 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.