ST JOHNSBURY
SubstationNew York · PUBLIC SERVICE CO OF NH
ST JOHNSBURY is an electric transmission substation in New York, operated by PUBLIC SERVICE CO OF NH. It is classified as sub-transmission (115 kv) and connects 2 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
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #3235 | 115 kV | VERMONT ELECTRIC POWER CO | IN SERVICE | 8.6 mi |
| #9232 | 115 kV | PUBLIC SERVICE CO OF NH | IN SERVICE | 9.6 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of ST JOHNSBURY, 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 |
|---|---|---|---|---|---|---|---|
| TAP136714 | Substation-Adjacent | VT | Caledonia County | 230 kV | 300 MW | 3.5 yrs | 63.8 |
| MONROE | Substation-Adjacent | VT | Caledonia County | 450 kV | 600 MW | 3.5 yrs | 62.5 |
| Greenfield (UNKNOWN133682 - MONROE) | Greenfield | NH | Grafton County | 450 kV | 600 MW | 3.5 yrs | 62.3 |
| Greenfield (UNKNOWN133682 - MONROE) | Greenfield | NH | Grafton County | 450 kV | 600 MW | 3.5 yrs | 60.8 |
| TAP137086 | Substation-Adjacent | NH | Grafton County | 115 kV | 100 MW | 3.5 yrs | 60.1 |
| Greenfield (UNKNOWN133682 - MONROE) | Greenfield | VT | Caledonia County | 450 kV | 600 MW | 3.5 yrs | 60.0 |
| Greenfield (MONROE - None) | Greenfield | VT | Essex County | 450 kV | 600 MW | 3.5 yrs | 60.0 |
| UNKNOWN137085 | Substation-Adjacent | NH | Grafton County | 115 kV | 100 MW | 3.5 yrs | 59.5 |
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 ST JOHNSBURY substation, New York. Pro and Enterprise plans unlock the full 164,098-site catalog, raw sub-scores, parcel ownership, interconnection-queue detail, saved searches, and programmatic API access.