TAP143456
SubstationMississippi · MISSISSIPPI POWER CO
At a glance
TAP143456 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 |
|---|---|---|---|---|
| #122881 | 115 kV | MISSISSIPPI POWER CO | IN SERVICE | 3.9 mi |
| #140573 | 115 kV | — | IN SERVICE | 4.2 mi |
| #155966 | 115 kV | MISSISSIPPI POWER CO | IN SERVICE | 5.1 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP143456, 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 |
|---|---|---|---|---|---|---|---|
| UNKNOWN109552 | Substation-Adjacent | MS | Clarke County | 230 kV | 300 MW | 3.9 yrs | 61.9 |
| UNKNOWN158292 | Substation-Adjacent | MS | Kemper County | 230 kV | 300 MW | 3.9 yrs | 61.5 |
| UNKNOWN109551 | Substation-Adjacent | MS | Clarke County | 230 kV | 300 MW | 3.9 yrs | 61.2 |
| UNKNOWN109540 | Substation-Adjacent | MS | Lauderdale County | 230 kV | 300 MW | 3.9 yrs | 61.2 |
| UNKNOWN109640 | Substation-Adjacent | MS | Lauderdale County | 230 kV | 300 MW | 3.9 yrs | 61.1 |
| UNKNOWN156971 | Substation-Adjacent | MS | Lauderdale County | 230 kV | 300 MW | 3.9 yrs | 60.9 |
| UNKNOWN156972 | Substation-Adjacent | MS | Lauderdale County | 230 kV | 300 MW | 3.9 yrs | 60.9 |
| UNKNOWN157848 | Substation-Adjacent | MS | Lauderdale County | 230 kV | 300 MW | 3.9 yrs | 60.9 |
Who owns the transmission lines at TAP143456?
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 13.3 miles.
How do candidate sites near TAP143456 score?
The 8 highest-scoring candidate sites within about 25 miles range from 61 to 62 on the 0–100 DC Readiness scale. They fall in Clarke County, Kemper County, Lauderdale 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 TAP143456 substation?
TAP143456 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 TAP143456 is at the national midpoint.
How many transmission lines connect to TAP143456 substation?
3 transmission lines terminate at or pass through TAP143456 in the HIFLD line data. The connected lines listed here run at 115 kV. Together the listed lines cover about 13.3 miles.
Who owns TAP143456 substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at TAP143456 belong to MISSISSIPPI POWER CO. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is TAP143456 substation located?
TAP143456 is in Mississippi at 32.3953, -88.4653. The datacenter candidate sites closest to it are in Clarke County, Kemper County, Lauderdale County.
Are there datacenter candidate sites near TAP143456 substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of TAP143456. The highest-scoring is UNKNOWN109552 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, “TAP143456 substation, Mississippi”, https://gridcensus.com/substations/mississippi/tap143456-531fc953 (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 TAP143456 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.