TAP143086
SubstationMississippi · MISSISSIPPI POWER CO
At a glance
TAP143086 is an electric transmission substation in Mississippi, on MISSISSIPPI POWER CO's transmission network. It is classified as sub-transmission (115 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 |
|---|---|---|---|---|
| #124780 | 115 kV | MISSISSIPPI POWER CO | IN SERVICE | 3.8 mi |
| #131329 | 115 kV | MISSISSIPPI POWER CO | IN SERVICE | 0.0 mi |
| #140731 | 115 kV | MISSISSIPPI POWER CO | IN SERVICE | 5.4 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP143086, 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 |
|---|---|---|---|---|---|---|---|
| UNKNOWN110237 | Substation-Adjacent | MS | Stone County | 230 kV | 300 MW | 3.9 yrs | 61.8 |
| HATTIESBURG SOUTHWEST | Substation-Adjacent | MS | Forrest County | 230 kV | 300 MW | 3.9 yrs | 60.9 |
| UNKNOWN109936 | Substation-Adjacent | MS | Forrest County | 230 kV | 300 MW | 3.9 yrs | 60.8 |
| UNKNOWN109935 | Substation-Adjacent | MS | Lamar County | 161 kV | 100 MW | 3.9 yrs | 60.7 |
| EC Coal Lamar County | Greenfield | MS | Lamar County | — | — | 3.9 yrs | 60.1 |
| OZ Marion | Greenfield | MS | Marion | — | — | 3.9 yrs | 59.6 |
| EC Coal Lamar County | Greenfield | MS | Lamar County | — | — | 3.9 yrs | 59.5 |
| EC Near R D Morrow | Greenfield | MS | Lamar | — | — | 3.9 yrs | 58.5 |
Who owns the transmission lines at TAP143086?
The 3 connected lines listed above are owned by MISSISSIPPI POWER CO. Line voltages range from 115 kV to 115 kV. Their combined recorded length is about 9.1 miles.
How do candidate sites near TAP143086 score?
The 8 highest-scoring candidate sites within about 25 miles range from 59 to 62 on the 0–100 DC Readiness scale. They fall in Stone County, Forrest County, Lamar County, Marion. 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 TAP143086 substation?
TAP143086 has a maximum voltage of 115 kV. That places it in the 115–229 kV band. The median named US substation in this dataset is 115 kV, so TAP143086 is at the national midpoint.
How many transmission lines connect to TAP143086 substation?
3 transmission lines terminate at or pass through TAP143086 in the HIFLD line data. The connected lines listed here run at 115 kV. Together the listed lines cover about 9.1 miles.
Who owns TAP143086 substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at TAP143086 belong to MISSISSIPPI POWER CO. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is TAP143086 substation located?
TAP143086 is in Mississippi at 31.2758, -89.3539. The datacenter candidate sites closest to it are in Stone County, Forrest County, Lamar County.
Are there datacenter candidate sites near TAP143086 substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of TAP143086. The highest-scoring is UNKNOWN110237 at 62/100. 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, “TAP143086 substation, Mississippi”, https://gridcensus.com/substations/mississippi/tap143086-2de2c4ee (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 TAP143086 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.