TAP149959
SubstationMississippi · ENTERGY MISSISSIPPI INC
At a glance
TAP149959 is an electric transmission substation in Mississippi, on ENTERGY MISSISSIPPI INC'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 |
|---|---|---|---|---|
| #115155 | 161 kV | ENTERGY MISSISSIPPI INC | IN SERVICE | 6.7 mi |
| #140778 | 161 kV | ENTERGY MISSISSIPPI INC | IN SERVICE | 0.0 mi |
| #150634 | 161 kV | ENTERGY MISSISSIPPI INC | IN SERVICE | 5.6 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP149959, 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 |
|---|---|---|---|---|---|---|---|
| GETWELL | Substation-Adjacent | MS | DeSoto County | 230 kV | 300 MW | 4.3 yrs | 64.5 |
| UNKNOWN110928 | Substation-Adjacent | MS | Panola County | 230 kV | 300 MW | 4.3 yrs | 63.1 |
| UNKNOWN110761 | Substation-Adjacent | MS | Panola County | 230 kV | 300 MW | 4.3 yrs | 60.7 |
| BYHALIA | Substation-Adjacent | MS | Marshall County | 161 kV | 100 MW | 4.3 yrs | 60.3 |
| NORTH OAKLAND | Substation-Adjacent | MS | Yalobusha County | 230 kV | 300 MW | 4.3 yrs | 60.3 |
| HERNANDO | Substation-Adjacent | MS | DeSoto County | 115 kV | 100 MW | 4.3 yrs | 60.0 |
| TAP154300 | Substation-Adjacent | MS | Marshall County | 161 kV | 100 MW | 3.9 yrs | 59.9 |
| HOLLY SPRINGS | Substation-Adjacent | MS | Marshall County | 161 kV | 100 MW | 3.9 yrs | 59.8 |
Who owns the transmission lines at TAP149959?
The 3 connected lines listed above are owned by ENTERGY MISSISSIPPI INC. Line voltages range from 161 kV to 161 kV. Their combined recorded length is about 12.2 miles.
How do candidate sites near TAP149959 score?
The 8 highest-scoring candidate sites within about 25 miles range from 60 to 65 on the 0–100 DC Readiness scale. They fall in DeSoto County, Panola County, Marshall County, Yalobusha 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 TAP149959 substation?
TAP149959 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 TAP149959 is above the national midpoint.
How many transmission lines connect to TAP149959 substation?
3 transmission lines terminate at or pass through TAP149959 in the HIFLD line data. The connected lines listed here run at 161 kV. Together the listed lines cover about 12.2 miles.
Who owns TAP149959 substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at TAP149959 belong to ENTERGY MISSISSIPPI INC. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is TAP149959 substation located?
TAP149959 is in Mississippi at 34.4644, -89.8130. The datacenter candidate sites closest to it are in DeSoto County, Panola County, Marshall County.
Are there datacenter candidate sites near TAP149959 substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of TAP149959. The highest-scoring is GETWELL at 65/100. 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, “TAP149959 substation, Mississippi”, https://gridcensus.com/substations/mississippi/tap149959-98c234a9 (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 TAP149959 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.