TAP143440
SubstationLouisiana · ENTERGY LOUISIANA LLC
At a glance
TAP143440 is an electric transmission substation in Louisiana, on ENTERGY LOUISIANA LLC'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 |
|---|---|---|---|---|
| #110662 | 115 kV | ENTERGY LOUISIANA LLC | IN SERVICE | 0.8 mi |
| #116274 | 115 kV | ENTERGY LOUISIANA LLC | IN SERVICE | 7.8 mi |
| #121805 | 115 kV | ENTERGY LOUISIANA LLC | IN SERVICE | 0.0 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP143440, 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 |
|---|---|---|---|---|---|---|---|
| UNKNOWN112536 | Substation-Adjacent | LA | St. Tammany Parish | 230 kV | 300 MW | 4.3 yrs | 59.6 |
| UNKNOWN112533 | Substation-Adjacent | LA | Livingston Parish | 230 kV | 300 MW | 4.3 yrs | 59.2 |
| UNKNOWN112442 | Substation-Adjacent | LA | Tangipahoa Parish | 230 kV | 300 MW | 4.3 yrs | 58.8 |
| PONCHATOULA | Substation-Adjacent | LA | Tangipahoa Parish | 230 kV | 300 MW | 4.3 yrs | 58.7 |
| INDEPENDENCE | Substation-Adjacent | LA | Tangipahoa Parish | 230 kV | 300 MW | 4.3 yrs | 58.6 |
| HAMMOND | Substation-Adjacent | LA | Tangipahoa Parish | 230 kV | 300 MW | 4.3 yrs | 58.6 |
| EC Near Washington Parish Energy Center | Greenfield | LA | Washington | — | — | 4.3 yrs | 57.9 |
| TAP143359 | Substation-Adjacent | MS | Walthall County | 115 kV | 100 MW | 4.3 yrs | 55.7 |
Who owns the transmission lines at TAP143440?
The 3 connected lines listed above are owned by ENTERGY LOUISIANA LLC. Line voltages range from 115 kV to 115 kV. Their combined recorded length is about 8.6 miles.
How do candidate sites near TAP143440 score?
The 8 highest-scoring candidate sites within about 25 miles range from 56 to 60 on the 0–100 DC Readiness scale. They fall in St. Tammany Parish, Livingston Parish, Tangipahoa Parish, Washington. The Louisiana average across 1,762 scored sites is 53.1. 615 of those Louisiana sites are classed as substation sites (candidate locations generated at an existing substation).
Frequently asked questions
How many transmission lines connect to TAP143440 substation?
3 transmission lines terminate at or pass through TAP143440 in the HIFLD line data. The connected lines listed here run at 115 kV. Together the listed lines cover about 8.6 miles.
Who owns TAP143440 substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at TAP143440 belong to ENTERGY LOUISIANA LLC. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is TAP143440 substation located?
TAP143440 is in Louisiana at 30.7628, -90.3785. The datacenter candidate sites closest to it are in St. Tammany Parish, Livingston Parish, Tangipahoa Parish.
Are there datacenter candidate sites near TAP143440 substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of TAP143440. The highest-scoring is UNKNOWN112536 at 60/100. Across Louisiana, the average DC Readiness score is 53.1.
More in Louisiana
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, “TAP143440 substation, Louisiana”, https://gridcensus.com/substations/louisiana/tap143440-bd543bf7 (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 TAP143440 substation, Louisiana 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.