HADDAM
SubstationConnecticut
HADDAM is an electric transmission substation in Connecticut. It is classified as high-voltage (345 kv) and connects 7 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 & operation
Operator not catalogued for this substation.
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of HADDAM, 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 |
|---|---|---|---|---|---|---|---|
| UNKNOWN135915 | Substation-Adjacent | CT | Southeastern Connecticut Planning Region | 345 kV | 600 MW | 3.9 yrs | 66.2 |
| TAP136499 | Substation-Adjacent | CT | Capitol Planning Region | 345 kV | 600 MW | 3.9 yrs | 66.1 |
| MONTVILLE | Substation-Adjacent | CT | Southeastern Connecticut Planning Region | 345 kV | 600 MW | 3.9 yrs | 66.0 |
| MANCHESTER | Substation-Adjacent | CT | Capitol Planning Region | 345 kV | 600 MW | 3.9 yrs | 65.9 |
| NO. WALL | Substation-Adjacent | CT | Lower Connecticut River Valley Planning Region | 345 kV | 600 MW | 3.9 yrs | 65.8 |
| BARBOUR HILL | Substation-Adjacent | CT | Capitol Planning Region | 345 kV | 600 MW | 3.9 yrs | 65.5 |
| SOUTHINGTON | Substation-Adjacent | CT | Naugatuck Valley Planning Region | 345 kV | 600 MW | 3.9 yrs | 65.4 |
| KLEEN | Substation-Adjacent | CT | Lower Connecticut River Valley Planning Region | 345 kV | 600 MW | 3.9 yrs | 65.2 |
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
This page shows a public slice of the GridCensus dataset for HADDAM substation, Connecticut. Pro and Enterprise plans unlock the full 147,272-site catalog, raw sub-scores, parcel ownership, interconnection-queue detail, saved searches, and programmatic API access.