JAFFREY
SubstationNew Hampshire
At a glance
JAFFREY is an electric transmission substation in New Hampshire. 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 JAFFREY, 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 |
|---|---|---|---|---|---|---|---|
| FITZWILLIAM | Substation-Adjacent | NH | Cheshire County | 345 kV | 600 MW | 4.3 yrs | 63.5 |
| PRATTS JUNCTION | Substation-Adjacent | MA | Worcester County | 230 kV | 300 MW | 4.3 yrs | 63.1 |
| SOUTH MILFORD | Substation-Adjacent | NH | Hillsborough County | 115 kV | 100 MW | 4.3 yrs | 61.4 |
| UNKNOWN137076 | Substation-Adjacent | NH | Hillsborough County | 115 kV | 100 MW | 4.3 yrs | 60.9 |
| TAP139726 | Substation-Adjacent | MA | Middlesex County | 115 kV | 100 MW | 4.3 yrs | 60.0 |
| TAP139723 | Substation-Adjacent | MA | Worcester County | 115 kV | 100 MW | 4.3 yrs | 58.9 |
| Fitchburg Gas & Electric Light Company | Brownfield | MA | Worcester | — | 1 MW | 4.3 yrs | 58.4 |
| EAST WINCHENDON | Substation-Adjacent | MA | Cheshire County | 115 kV | 100 MW | 4.3 yrs | 58.4 |
How do candidate sites near JAFFREY score?
The 8 highest-scoring candidate sites within about 25 miles range from 58 to 64 on the 0–100 DC Readiness scale. They fall in Cheshire County, Worcester County, Hillsborough County, Middlesex County. The New Hampshire average across 539 scored sites is 54.5. 83 of those New Hampshire sites are classed as substation sites (candidate locations generated at an existing substation).
Frequently asked questions
How many transmission lines connect to JAFFREY substation?
0 transmission lines terminate at or pass through JAFFREY in the HIFLD line data.
Where is JAFFREY substation located?
JAFFREY is in New Hampshire at 42.8191, -72.0313. The datacenter candidate sites closest to it are in Cheshire County, Worcester County, Hillsborough County.
Are there datacenter candidate sites near JAFFREY substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of JAFFREY. The highest-scoring is FITZWILLIAM at 64/100. Across New Hampshire, the average DC Readiness score is 54.5.
More in New Hampshire
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, “JAFFREY substation, New Hampshire”, https://gridcensus.com/substations/new-hampshire/jaffrey-b5ae3ace (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 JAFFREY substation, New Hampshire 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.