TAP136563
SubstationConnecticut · CONNECTICUT LIGHT & POWER CO
At a glance
TAP136563 is an electric transmission substation in Connecticut, on CONNECTICUT LIGHT & 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
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 |
|---|---|---|---|---|
| #102847 | 115 kV | — | IN SERVICE | 1.5 mi |
| #131381 | 115 kV | CONNECTICUT LIGHT & POWER CO | IN SERVICE | 3.4 mi |
| #135476 | 115 kV | CONNECTICUT LIGHT & POWER CO | IN SERVICE | 2.3 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP136563, 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 |
|---|---|---|---|---|---|---|---|
| NEW HAVEN HARBOR | Substation-Adjacent | CT | South Central Connecticut Planning Region | 345 kV | 600 MW | 4.3 yrs | 68.8 |
| FROST BRIDGE | Substation-Adjacent | CT | Naugatuck Valley Planning Region | 345 kV | 600 MW | 4.3 yrs | 68.5 |
| NO. WALL | Substation-Adjacent | CT | Lower Connecticut River Valley Planning Region | 345 kV | 600 MW | 4.3 yrs | 68.2 |
| PLUMTREE | Substation-Adjacent | CT | Western Connecticut Planning Region | 345 kV | 600 MW | 4.3 yrs | 68.2 |
| NORTH BLOOMFIELD | Substation-Adjacent | CT | Capitol Planning Region | 345 kV | 600 MW | 4.3 yrs | 67.9 |
| SOUTHINGTON | Substation-Adjacent | CT | Naugatuck Valley Planning Region | 345 kV | 600 MW | 4.3 yrs | 67.8 |
| DEVON | Substation-Adjacent | CT | Greater Bridgeport Planning Region | 115 kV | 100 MW | 4.3 yrs | 65.0 |
| SHEPAUG | Substation-Adjacent | CT | Naugatuck Valley Planning Region | 115 kV | 100 MW | 4.3 yrs | 63.9 |
Who owns the transmission lines at TAP136563?
The 3 connected lines listed above are owned by CONNECTICUT LIGHT & POWER CO. Line voltages range from 115 kV to 115 kV. Their combined recorded length is about 7.2 miles.
How do candidate sites near TAP136563 score?
The 8 highest-scoring candidate sites within about 25 miles range from 64 to 69 on the 0–100 DC Readiness scale. They fall in South Central Connecticut Planning Region, Naugatuck Valley Planning Region, Lower Connecticut River Valley Planning Region, Western Connecticut Planning Region. The Connecticut average across 919 scored sites is 56.7. 171 of those Connecticut sites are classed as substation sites (candidate locations generated at an existing substation).
Frequently asked questions
What voltage is TAP136563 substation?
TAP136563 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 TAP136563 is at the national midpoint.
How many transmission lines connect to TAP136563 substation?
3 transmission lines terminate at or pass through TAP136563 in the HIFLD line data. The connected lines listed here run at 115 kV. Together the listed lines cover about 7.2 miles.
Who owns TAP136563 substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at TAP136563 belong to CONNECTICUT LIGHT & POWER CO. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is TAP136563 substation located?
TAP136563 is in Connecticut at 41.5862, -73.0156. The datacenter candidate sites closest to it are in South Central Connecticut Planning Region, Naugatuck Valley Planning Region, Lower Connecticut River Valley Planning Region.
Are there datacenter candidate sites near TAP136563 substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of TAP136563. The highest-scoring is NEW HAVEN HARBOR at 69/100. Across Connecticut, the average DC Readiness score is 56.7.
More in Connecticut
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, “TAP136563 substation, Connecticut”, https://gridcensus.com/substations/connecticut/tap136563-530fee1a (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 TAP136563 substation, Connecticut 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.