MERRIMACK
SubstationVermont · PUBLIC SERVICE CO OF NH
MERRIMACK is an electric transmission substation in Vermont, operated by PUBLIC SERVICE CO OF NH. It is classified as high-voltage (230 kv) and connects 5 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
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #39964 | 230 kV | PUBLIC SERVICE CO OF NH | IN SERVICE | 8.4 mi |
| #61 | 115 kV | PUBLIC SERVICE CO OF NH | IN SERVICE | 12.3 mi |
| #24140 | 115 kV | PUBLIC SERVICE CO OF NH | IN SERVICE | 2.7 mi |
| #36232 | 115 kV | PUBLIC SERVICE CO OF NH | IN SERVICE | 10.8 mi |
| #38002 | 115 kV | PUBLIC SERVICE CO OF NH | IN SERVICE | 10.7 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of MERRIMACK, 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 |
|---|---|---|---|---|---|---|---|
| BEDFORD | Substation-Adjacent | NH | Hillsborough County | 230 kV | 300 MW | 3.5 yrs | 75.6 |
| GRANITE RIDGE | Substation-Adjacent | NH | Hillsborough County | 230 kV | 300 MW | 3.5 yrs | 74.7 |
| UNKNOWN137065 | Substation-Adjacent | NH | Hillsborough County | 230 kV | 300 MW | 3.5 yrs | 73.7 |
| SCOBIE POND 345KV | Substation-Adjacent | NH | Rockingham County | 345 kV | 600 MW | 3.5 yrs | 73.5 |
| UNKNOWN132717 | Substation-Adjacent | NH | Rockingham County | 230 kV | 300 MW | 3.5 yrs | 73.5 |
| UNKNOWN132736 | Substation-Adjacent | NH | Hillsborough County | 230 kV | 300 MW | 3.5 yrs | 72.6 |
| TAP137063 | Substation-Adjacent | NH | Merrimack County | 230 kV | 300 MW | 3.5 yrs | 72.2 |
| UNKNOWN132744 | Substation-Adjacent | NH | Hillsborough County | 345 kV | 600 MW | 3.5 yrs | 71.7 |
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 MERRIMACK substation, Vermont. 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.