TAP154390
SubstationAlabama · TENNESSEE VALLEY AUTHORITY
At a glance
TAP154390 is an electric transmission substation in Alabama, on TENNESSEE VALLEY AUTHORITY's transmission network. It is classified as unclassified 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 |
|---|---|---|---|---|
| #118941 | — | TENNESSEE VALLEY AUTHORITY | IN SERVICE | 5.3 mi |
| #141952 | — | TENNESSEE VALLEY AUTHORITY | IN SERVICE | 7.1 mi |
| #147326 | — | TENNESSEE VALLEY AUTHORITY | IN SERVICE | 0.1 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP154390, 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 |
|---|---|---|---|---|---|---|---|
| LIMESTONE | Substation-Adjacent | AL | Limestone County | 500 kV | 1,000 MW | 3.9 yrs | 69.5 |
| TRINITY | Substation-Adjacent | AL | Limestone County | 500 kV | 1,000 MW | 3.9 yrs | 68.0 |
| UNKNOWN114484 | Substation-Adjacent | AL | Limestone County | 500 kV | 1,000 MW | 3.9 yrs | 67.9 |
| BROWNS FERRY | Substation-Adjacent | AL | Limestone County | 500 kV | 1,000 MW | 3.9 yrs | 67.4 |
| UNKNOWN114305 | Substation-Adjacent | AL | Madison County | 161 kV | 100 MW | 3.9 yrs | 63.6 |
| UNKNOWN114306 | Substation-Adjacent | AL | Madison County | 161 kV | 100 MW | 3.9 yrs | 63.3 |
| UNKNOWN111049 | Substation-Adjacent | AL | Limestone County | 161 kV | 100 MW | 3.9 yrs | 61.5 |
| TAP168953 | Substation-Adjacent | AL | Morgan County | 161 kV | 100 MW | 3.9 yrs | 61.4 |
Who owns the transmission lines at TAP154390?
The 3 connected lines listed above are owned by TENNESSEE VALLEY AUTHORITY. Their combined recorded length is about 12.5 miles.
How do candidate sites near TAP154390 score?
The 8 highest-scoring candidate sites within about 25 miles range from 61 to 70 on the 0–100 DC Readiness scale. They fall in Limestone County, Madison County, Morgan 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
How many transmission lines connect to TAP154390 substation?
3 transmission lines terminate at or pass through TAP154390 in the HIFLD line data. Together the listed lines cover about 12.5 miles.
Who owns TAP154390 substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at TAP154390 belong to TENNESSEE VALLEY AUTHORITY. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is TAP154390 substation located?
TAP154390 is in Alabama at 34.7977, -87.1230. The datacenter candidate sites closest to it are in Limestone County, Madison County, Morgan County.
Are there datacenter candidate sites near TAP154390 substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of TAP154390. The highest-scoring is LIMESTONE at 70/100. 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, “TAP154390 substation, Alabama”, https://gridcensus.com/substations/alabama/tap154390-03dfc209 (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 TAP154390 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.