TAP169978
SubstationLouisiana · ENTERGY LOUISIANA LLC
At a glance
TAP169978 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 |
|---|---|---|---|---|
| #171775 | — | ENTERGY LOUISIANA LLC | IN SERVICE | 0.1 mi |
| #171776 | — | ENTERGY LOUISIANA LLC | IN SERVICE | 0.0 mi |
| #171777 | — | ENTERGY LOUISIANA LLC | IN SERVICE | 6.8 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP169978, 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 |
|---|---|---|---|---|---|---|---|
| BOGALUSA | Substation-Adjacent | LA | Washington Parish | 500 kV | 1,000 MW | 4.3 yrs | 68.1 |
| UNKNOWN112451 | Substation-Adjacent | LA | Pearl River County | 230 kV | 300 MW | 4.3 yrs | 60.8 |
| UNKNOWN112536 | Substation-Adjacent | LA | St. Tammany Parish | 230 kV | 300 MW | 4.3 yrs | 59.6 |
| 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 |
Who owns the transmission lines at TAP169978?
The 3 connected lines listed above are owned by ENTERGY LOUISIANA LLC. Their combined recorded length is about 6.9 miles.
How do candidate sites near TAP169978 score?
The 8 highest-scoring candidate sites within about 25 miles range from 58 to 68 on the 0–100 DC Readiness scale. They fall in Washington Parish, Pearl River County, St. Tammany Parish, Tangipahoa Parish. 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 TAP169978 substation?
3 transmission lines terminate at or pass through TAP169978 in the HIFLD line data. Together the listed lines cover about 6.9 miles.
Who owns TAP169978 substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at TAP169978 belong to ENTERGY LOUISIANA LLC. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is TAP169978 substation located?
TAP169978 is in Louisiana at 30.8249, -90.1425. The datacenter candidate sites closest to it are in Washington Parish, Pearl River County, St. Tammany Parish.
Are there datacenter candidate sites near TAP169978 substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of TAP169978. The highest-scoring is BOGALUSA at 68/100. 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, “TAP169978 substation, Louisiana”, https://gridcensus.com/substations/louisiana/tap169978-c023865e (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 TAP169978 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.