TAP154377
SubstationMississippi · TENNESSEE VALLEY AUTHORITY
At a glance
TAP154377 is an electric transmission substation in Mississippi, on TENNESSEE VALLEY AUTHORITY'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
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 |
|---|---|---|---|---|
| #109254 | 161 kV | TENNESSEE VALLEY AUTHORITY | IN SERVICE | 0.1 mi |
| #115989 | 161 kV | TENNESSEE VALLEY AUTHORITY | IN SERVICE | 0.6 mi |
| #132445 | 161 kV | TENNESSEE VALLEY AUTHORITY | IN SERVICE | 1.3 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP154377, 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 |
|---|---|---|---|---|---|---|---|
| OZ Alcorn | Greenfield | MS | Alcorn | — | — | 3.9 yrs | 60.1 |
| MIDDLETON | Substation-Adjacent | TN | Hardeman County | 161 kV | 100 MW | 3.9 yrs | 60.0 |
| TAP154415 | Substation-Adjacent | TN | Hardeman County | 161 kV | 100 MW | 3.9 yrs | 59.8 |
| TAP154373 | Substation-Adjacent | MS | Tippah County | 161 kV | 100 MW | 3.9 yrs | 58.9 |
| UNKNOWN169436 | Substation-Adjacent | MS | Alcorn County | 161 kV | 100 MW | 3.9 yrs | 58.4 |
| TAP154378 | Substation-Adjacent | MS | Alcorn County | 161 kV | 100 MW | 3.9 yrs | 58.4 |
| KIMBERLY CLARK | Substation-Adjacent | MS | Alcorn County | 161 kV | 100 MW | 3.9 yrs | 58.4 |
| TAP154380 | Substation-Adjacent | MS | Tishomingo County | 161 kV | 100 MW | 3.9 yrs | 58.3 |
Who owns the transmission lines at TAP154377?
The 3 connected lines listed above are owned by TENNESSEE VALLEY AUTHORITY. Line voltages range from 161 kV to 161 kV. Their combined recorded length is about 2 miles.
How do candidate sites near TAP154377 score?
The 8 highest-scoring candidate sites within about 25 miles range from 58 to 60 on the 0–100 DC Readiness scale. They fall in Alcorn, Hardeman County, Tippah County, Alcorn County. The Mississippi average across 3,104 scored sites is 53. 694 of those Mississippi sites are classed as substation sites (candidate locations generated at an existing substation).
Frequently asked questions
What voltage is TAP154377 substation?
TAP154377 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 TAP154377 is above the national midpoint.
How many transmission lines connect to TAP154377 substation?
3 transmission lines terminate at or pass through TAP154377 in the HIFLD line data. The connected lines listed here run at 161 kV. Together the listed lines cover about 2 miles.
Who owns TAP154377 substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at TAP154377 belong to TENNESSEE VALLEY AUTHORITY. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is TAP154377 substation located?
TAP154377 is in Mississippi at 34.9263, -88.5215. The datacenter candidate sites closest to it are in Alcorn, Hardeman County, Tippah County.
Are there datacenter candidate sites near TAP154377 substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of TAP154377. The highest-scoring is OZ Alcorn at 60/100. Across Mississippi, the average DC Readiness score is 53.
More in Mississippi
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, “TAP154377 substation, Mississippi”, https://gridcensus.com/substations/mississippi/tap154377-b4ee9360 (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 TAP154377 substation, Mississippi 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.