Greenfield (ST JOHNSBURY - LITTLETON)
GreenfieldCaledonia County, Vermont · ISO-NE
At a glance
Greenfield (ST JOHNSBURY - LITTLETON) is a greenfield datacenter candidate site in Caledonia County, Vermont, scoring 50.8/100 DC Readiness — 56th of 57 scored sites in the county. Its nearest substation is ST JOHNSBURY. It sits in the ISO-NE grid region and the GREEN MOUNTAIN POWER CORP service territory, where interconnection has averaged 4.3 years from request to operation. GridCensus catalogs 100 MW of candidate capacity here.
Power & interconnection
Speed to power
Middle-of-the-pack interconnection conditions for this grid.
Connectivity
Site characteristics
Risk & environment
Location context
Regulatory climate
No notable statewide DC restriction on record; confirm local zoning and utility tariffs.
Site location
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How does Greenfield (ST JOHNSBURY - LITTLETON) compare with other sites in Caledonia County?
Greenfield (ST JOHNSBURY - LITTLETON) ranks 56th of 57 scored candidate sites in Caledonia County. Its 50.8/100 is roughly in line with the county average of 52.1. It is roughly in line with the Vermont average of 54.3 and roughly in line with the national average of 53.2.
Against the Vermont average, its strongest sub-score is natural hazard (85 vs 84) and its weakest is fiber connectivity (63 vs 75). Power and speed to power each carry 20% of the composite score, fiber 12%, water 7% and hazard 6%.
How close is Greenfield (ST JOHNSBURY - LITTLETON) to power, fiber and other datacenters?
The nearest mapped substation, ST JOHNSBURY, is the closest grid connection point on record and operates at 115 kV. For connectivity, the nearest internet exchange facility is Tech Vault South Burlington at 59.3 miles. 7 fiber providers report service at the location in FCC broadband data. The closest operating datacenter on record is Tech Vault South Burlington, 59.3 miles away.
What are the flood, water and hazard risks at Greenfield (ST JOHNSBURY - LITTLETON)?
At the county level, FEMA's National Risk Index rates Caledonia County "Relatively Low".
Full DC Readiness breakdown
All 13 weighted sub-scores (0–100) behind the composite DC Readiness score.
Nearby comparable sites
Other scored datacenter candidate sites in Caledonia County, ranked by DC Readiness.
| Site | Type | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|
| MONROE | Substation-Adjacent | 450 kV | 600 MW | 4.3 yrs | 65.0 |
| TAP136713 | Substation-Adjacent | 230 kV | 300 MW | 4.3 yrs | 60.6 |
| ST JOHNSBURY | Substation-Adjacent | 115 kV | 100 MW | 4.3 yrs | 57.1 |
| UNKNOWN133765 | Substation-Adjacent | 115 kV | 100 MW | 4.3 yrs | 57.1 |
| TAP136699 | Substation-Adjacent | 115 kV | 100 MW | 4.3 yrs | 56.3 |
| TAP137086 | Substation-Adjacent | 115 kV | 100 MW | 4.3 yrs | 56.1 |
| OZ Caledonia | Greenfield | — | — | 4.3 yrs | 54.5 |
| OZ Caledonia | Greenfield | — | — | 4.3 yrs | 53.9 |
Greenfield (ST JOHNSBURY - LITTLETON): common questions
What is the DC Readiness score of Greenfield (ST JOHNSBURY - LITTLETON)?
Greenfield (ST JOHNSBURY - LITTLETON) scores 50.8/100 on the GridCensus DC Readiness scale, rated fair. It ranks 56th of 57 scored sites in Caledonia County. The Caledonia County average is 52.1 and the Vermont average is 54.3.
What is the nearest substation to Greenfield (ST JOHNSBURY - LITTLETON)?
The nearest mapped substation is ST JOHNSBURY, at 115 kV. GridCensus catalogs 100 MW of candidate capacity for the site.
Which electric utility serves Greenfield (ST JOHNSBURY - LITTLETON)?
GREEN MOUNTAIN POWER CORP (investor owned) holds the retail service territory that contains the site.
What grid region is Greenfield (ST JOHNSBURY - LITTLETON) in?
Greenfield (ST JOHNSBURY - LITTLETON) is in the ISO-NE region. Projects interconnecting there have averaged a 4.3-year wait from queue request to operation.
How far is Greenfield (ST JOHNSBURY - LITTLETON) from an internet exchange?
The nearest internet exchange facility is Tech Vault South Burlington, about 59.3 miles away; 7 fiber providers report service at the location.
Related pages
About this data
Source: GridCensus composite of HIFLD transmission and substation data, EIA, FEMA National Risk Index, FCC broadband data, PeeringDB and ISO interconnection queues, as published October 10, 2026 — GridCensus refreshes it monthly. See the methodology for how records are matched, cleaned and scored.
Cite as: GridCensus, “Greenfield (ST JOHNSBURY - LITTLETON), Caledonia County, VT”, https://gridcensus.com/datacenter-sites/vermont/caledonia-county/greenfield-st-johnsbury-littleton-92c3b873 (data as of October 10, 2026).
Dataset updated . Screening estimates derived from public data sources.
Figures are screening estimates derived from public infrastructure data. Catalogued capacity reflects theoretical candidate capacity, not deliverable or committed interconnection. Confirm all values with the utility, ISO, and on-the-ground due diligence.
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Every site and score for Greenfield (ST JOHNSBURY - LITTLETON), Caledonia County 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.