HAUPPAUGE
SubstationNew York · LONG ISLAND POWER AUTHORITY
At a glance
HAUPPAUGE is an electric transmission substation in New York, on LONG ISLAND POWER AUTHORITY's transmission network. It is classified as unclassified and connects 1 transmission line. 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
Ownership
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #134941 | — | LONG ISLAND POWER AUTHORITY | IN SERVICE | 2.1 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of HAUPPAUGE, 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 |
|---|---|---|---|---|---|---|---|
| BRIDGEPORT RESCO | Substation-Adjacent | CT | Greater Bridgeport Planning Region | 345 kV | 600 MW | 4.3 yrs | 71.7 |
| DUFFY AVENUE CONVERTER STATION | Substation-Adjacent | NY | Nassau County | 500 kV | 1,000 MW | 4.3 yrs | 70.2 |
| SHORE RD | Substation-Adjacent | NY | Nassau County | 345 kV | 600 MW | 4.3 yrs | 68.8 |
| EAST GARDEN CITY | Substation-Adjacent | NY | Nassau County | 345 kV | 600 MW | 4.3 yrs | 67.6 |
| NEWBRIDGE ROAD | Substation-Adjacent | NY | Nassau County | 345 kV | 600 MW | 4.3 yrs | 67.3 |
| DEVON | Substation-Adjacent | CT | Greater Bridgeport Planning Region | 115 kV | 100 MW | 4.3 yrs | 65.0 |
| WATERSIDE | Substation-Adjacent | CT | Westchester County | 115 kV | 100 MW | 4.3 yrs | 63.9 |
| SOUTH END | Substation-Adjacent | CT | Westchester County | 115 kV | 100 MW | 4.3 yrs | 63.3 |
Who owns the transmission lines at HAUPPAUGE?
The 1 connected line listed above is owned by LONG ISLAND POWER AUTHORITY. Their combined recorded length is about 2.1 miles.
How do candidate sites near HAUPPAUGE score?
The 8 highest-scoring candidate sites within about 25 miles range from 63 to 72 on the 0–100 DC Readiness scale. They fall in Greater Bridgeport Planning Region, Nassau County, Westchester County. The New York average across 2,980 scored sites is 54. 844 of those New York sites are classed as substation sites (candidate locations generated at an existing substation).
Frequently asked questions
How many transmission lines connect to HAUPPAUGE substation?
1 transmission line terminate at or pass through HAUPPAUGE in the HIFLD line data. Together the listed lines cover about 2.1 miles.
Who owns HAUPPAUGE substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at HAUPPAUGE belong to LONG ISLAND POWER AUTHORITY. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is HAUPPAUGE substation located?
HAUPPAUGE is in New York at 40.8151, -73.2697. The datacenter candidate sites closest to it are in Greater Bridgeport Planning Region, Nassau County, Westchester County.
Are there datacenter candidate sites near HAUPPAUGE substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of HAUPPAUGE. The highest-scoring is BRIDGEPORT RESCO at 72/100. Across New York, the average DC Readiness score is 54.
More in New York
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, “HAUPPAUGE substation, New York”, https://gridcensus.com/substations/new-york/hauppauge-92197280 (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 HAUPPAUGE substation, New York 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.