TAP141939
SubstationAlabama · ALABAMA POWER CO
At a glance
TAP141939 is an electric transmission substation in Alabama, on ALABAMA POWER CO's transmission network. It is classified as sub-transmission (138 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
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #124800 | 161 kV | ALABAMA POWER CO | IN SERVICE | 12.8 mi |
| #127787 | 161 kV | ALABAMA POWER CO | IN SERVICE | 5.0 mi |
| #138991 | 161 kV | ALABAMA POWER CO | IN SERVICE | 10.2 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP141939, 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 |
|---|---|---|---|---|---|---|---|
| UNKNOWN109244 | Substation-Adjacent | AL | Jefferson County | 500 kV | 1,000 MW | 3.9 yrs | 69.0 |
| UNKNOWN109246 | Substation-Adjacent | AL | Walker County | 230 kV | 300 MW | 3.9 yrs | 65.0 |
| EC Coal Jefferson County | Greenfield | AL | Jefferson County | — | — | 3.9 yrs | 63.2 |
| UNKNOWN111705 | Substation-Adjacent | AL | Jefferson County | 115 kV | 100 MW | 3.9 yrs | 61.2 |
| TAP168870 | Substation-Adjacent | AL | Jefferson County | 115 kV | 100 MW | 3.9 yrs | 61.1 |
| UNKNOWN111689 | Substation-Adjacent | AL | Jefferson County | 115 kV | 100 MW | 3.9 yrs | 60.8 |
| TAP141909 | Substation-Adjacent | AL | Jefferson County | 115 kV | 100 MW | 3.9 yrs | 60.8 |
| TAP141910 | Substation-Adjacent | AL | Jefferson County | 115 kV | 100 MW | 3.9 yrs | 60.8 |
Who owns the transmission lines at TAP141939?
The 3 connected lines listed above are owned by ALABAMA POWER CO. Line voltages range from 161 kV to 161 kV. Their combined recorded length is about 28 miles.
How do candidate sites near TAP141939 score?
The 8 highest-scoring candidate sites within about 25 miles range from 61 to 69 on the 0–100 DC Readiness scale. They fall in Jefferson County, Walker County. The Alabama average across 3,107 scored sites is 55. 1,164 of those Alabama sites are classed as substation sites (candidate locations generated at an existing substation).
Frequently asked questions
What voltage is TAP141939 substation?
TAP141939 has a maximum voltage of 161 kV. That places it in the 115–229 kV band. The median named US substation in this dataset is 115 kV, so TAP141939 is above the national midpoint.
How many transmission lines connect to TAP141939 substation?
3 transmission lines terminate at or pass through TAP141939 in the HIFLD line data. The connected lines listed here run at 161 kV. Together the listed lines cover about 28 miles.
Who owns TAP141939 substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at TAP141939 belong to ALABAMA POWER CO. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is TAP141939 substation located?
TAP141939 is in Alabama at 33.6677, -87.4193. The datacenter candidate sites closest to it are in Jefferson County, Walker County.
Are there datacenter candidate sites near TAP141939 substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of TAP141939. The highest-scoring is UNKNOWN109244 at 69/100. Across Alabama, the average DC Readiness score is 55.
More in Alabama
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, “TAP141939 substation, Alabama”, https://gridcensus.com/substations/alabama/tap141939-6ccdcd8c (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 TAP141939 substation, Alabama 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.