Substation-Adjacent site at 42.520, -71.713
Substation-AdjacentMiddlesex, Massachusetts · ISO-NE
At a glance
Substation-Adjacent site at 42.520, -71.713 is a substation-adjacent datacenter candidate site in Middlesex, Massachusetts, scoring 58.0/100 DC Readiness — 59th of 281 scored sites in the county. Its nearest substation is TAP139731 (0 mi, 69 kV). It sits in the ISO-NE grid region, where interconnection has averaged 4.3 years from request to operation. GridCensus catalogs 50 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 Substation-Adjacent site at 42.520, -71.713 compare with other sites in Middlesex?
Substation-Adjacent site at 42.520, -71.713 ranks 59th of 281 scored candidate sites in Middlesex. Its 58.0/100 is roughly in line with the county average of 56.9. It is roughly in line with the Massachusetts average of 54.2 and roughly in line with the national average of 53.2.
Against the Massachusetts average, its strongest sub-score is power availability (46 vs 35) and its weakest is speed to power (47 vs 47). Power and speed to power each carry 20% of the composite score, fiber 12%, water 7% and hazard 6%.
How close is Substation-Adjacent site at 42.520, -71.713 to power, fiber and other datacenters?
The nearest mapped substation, TAP139731, is about 0 miles away and operates at 69 kV. For connectivity, the nearest internet exchange facility is Iron Mountain Data Center - Boston (BOS-1) at 13 miles. 11 fiber providers report service at the location in FCC broadband data. The closest operating datacenter on record is Iron Mountain Data Center - Boston (BOS-1), 13 miles away.
What are the flood, water and hazard risks at Substation-Adjacent site at 42.520, -71.713?
The site is in FEMA flood zone X, outside the Special Flood Hazard Area (minimal or moderate flood risk). At the county level, FEMA's National Risk Index rates Middlesex "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 Middlesex, ranked by DC Readiness.
| Site | Type | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|
| UNKNOWN133682 | Substation-Adjacent | 450 kV | 600 MW | 4.3 yrs | 68.3 |
| TEWKSBURY NO. 22A | Substation-Adjacent | 345 kV | 600 MW | 4.3 yrs | 67.2 |
| LEXINGTON | Substation-Adjacent | 345 kV | 600 MW | 4.3 yrs | 67.0 |
| WALTHAM | Substation-Adjacent | 230 kV | 300 MW | 4.3 yrs | 66.3 |
| SUDBURY | Substation-Adjacent | 230 kV | 300 MW | 4.3 yrs | 64.7 |
| Westford St. Landfill | Brownfield | — | 2 MW | 4.3 yrs | 64.7 |
| Industri-plex Solar | Brownfield | 345 kV | 4 MW | 4.3 yrs | 64.3 |
| UNKNOWN140692 | Substation-Adjacent | 115 kV | 100 MW | 4.3 yrs | 63.6 |
Substation-Adjacent site at 42.520, -71.713: common questions
What is the DC Readiness score of Substation-Adjacent site at 42.520, -71.713?
Substation-Adjacent site at 42.520, -71.713 scores 58.0/100 on the GridCensus DC Readiness scale, rated good. It ranks 59th of 281 scored sites in Middlesex. The Middlesex average is 56.9 and the Massachusetts average is 54.2.
What is the nearest substation to Substation-Adjacent site at 42.520, -71.713?
The nearest mapped substation is TAP139731, about 0 miles away, at 69 kV. GridCensus catalogs 50 MW of candidate capacity for the site.
What grid region is Substation-Adjacent site at 42.520, -71.713 in?
Substation-Adjacent site at 42.520, -71.713 is in the ISO-NE region. Projects interconnecting there have averaged a 4.3-year wait from queue request to operation.
Is Substation-Adjacent site at 42.520, -71.713 in a flood zone?
The site is in FEMA flood zone X, outside the Special Flood Hazard Area (minimal or moderate flood risk).
How far is Substation-Adjacent site at 42.520, -71.713 from an internet exchange?
The nearest internet exchange facility is Iron Mountain Data Center - Boston (BOS-1), about 13 miles away; 11 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, “Substation-Adjacent site at 42.520, -71.713, Middlesex, MA”, https://gridcensus.com/datacenter-sites/massachusetts/middlesex/tap139731-19daefd7 (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 Substation-Adjacent site at 42.520, -71.713, Middlesex 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.