RAINBOW
SubstationConnecticut
At a glance
RAINBOW is an electric transmission substation in Connecticut. It is classified as unclassified and connects 0 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
No owner is recorded for the lines that connect here.
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of RAINBOW, 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 |
|---|---|---|---|---|---|---|---|
| UNKNOWN133485 | Substation-Adjacent | MA | Hampden County | 345 kV | 600 MW | 4.3 yrs | 68.5 |
| FROST BRIDGE | Substation-Adjacent | CT | Naugatuck Valley Planning Region | 345 kV | 600 MW | 4.3 yrs | 68.5 |
| TAP136499 | Substation-Adjacent | CT | Capitol Planning Region | 345 kV | 600 MW | 4.3 yrs | 68.4 |
| MANCHESTER | Substation-Adjacent | CT | Capitol Planning Region | 345 kV | 600 MW | 4.3 yrs | 68.3 |
| NORTH BLOOMFIELD | Substation-Adjacent | CT | Capitol Planning Region | 345 kV | 600 MW | 4.3 yrs | 67.9 |
| BARBOUR HILL | 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 |
| KLEEN | Substation-Adjacent | CT | Lower Connecticut River Valley Planning Region | 345 kV | 600 MW | 4.3 yrs | 67.6 |
How do candidate sites near RAINBOW score?
The 8 highest-scoring candidate sites within about 25 miles range from 68 to 69 on the 0–100 DC Readiness scale. They fall in Hampden County, Naugatuck Valley Planning Region, Capitol Planning Region, Lower Connecticut River Valley 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
How many transmission lines connect to RAINBOW substation?
0 transmission lines terminate at or pass through RAINBOW in the HIFLD line data.
Where is RAINBOW substation located?
RAINBOW is in Connecticut at 41.9156, -72.6928. The datacenter candidate sites closest to it are in Hampden County, Naugatuck Valley Planning Region, Capitol Planning Region.
Are there datacenter candidate sites near RAINBOW substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of RAINBOW. The highest-scoring is UNKNOWN133485 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, “RAINBOW substation, Connecticut”, https://gridcensus.com/substations/connecticut/rainbow-39be9577 (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 RAINBOW 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.