{
  "version": "2026-09-16",
  "snapshotAt": "2026-09-16",
  "methodologyVersion": "3",
  "datasetPublished": "2026-03-09",
  "counts": {
    "megaProjects": 54,
    "megaCapacityMW": 109198,
    "megaInvestmentB": 1206.2,
    "facilities": 1771,
    "jurisdictions": 48,
    "estimatedTotal": 5207
  },
  "files": [
    {
      "name": "mega-projects.csv",
      "mediaType": "text/csv",
      "bytes": 20496,
      "sha256": "eb44886446fa6eeb9a1c71c15661a0cc5b14ba95211d6876b8292434bcafb6be",
      "rows": 54,
      "license": "compilation",
      "description": "Tracked US data center mega projects with the basis and confidence of every figure. One row per project, sorted by planned capacity."
    },
    {
      "name": "mega-projects.json",
      "mediaType": "application/json",
      "bytes": 61249,
      "sha256": "99e8a57d3b7946183f5901cff2a716d8d0a3b7c301585020ab7a4022018d1b9b",
      "rows": null,
      "license": "compilation",
      "description": "The same projects as mega-projects.csv in camelCase, with the project description, the source as an object, national totals split by basis, and the basis dictionary inline."
    },
    {
      "name": "states.csv",
      "mediaType": "text/csv",
      "bytes": 4671,
      "sha256": "62bcadc83494d1a8541890b80297817e31f049e91945aa98aac8c68cf618f987",
      "rows": 48,
      "license": "compilation",
      "description": "Verified and estimated facility counts plus mega project totals for every covered jurisdiction, sorted by verified count."
    },
    {
      "name": "facilities.csv",
      "mediaType": "text/csv",
      "bytes": 256877,
      "sha256": "38c6674ecd353fcec039be57eb83dff8d15ea9f0da30a75fa1ec392b37538294",
      "rows": 1771,
      "license": "facilities",
      "description": "Every OSM-verified facility in the directory, all jurisdictions in one file. The live site serves this layer per state at /data-centers/<state>/facilities.csv."
    },
    {
      "name": "README.md",
      "mediaType": "text/markdown",
      "bytes": 9271,
      "sha256": "f5dbf7c4e0960ef2271fce4a1eb397dde1942adc3373ecd183c1b3583fa4d02c",
      "rows": null,
      "license": null,
      "description": "Human-readable description of this release: counts, files, data dictionary, method, changes, citation."
    },
    {
      "name": "LICENSE.txt",
      "mediaType": "text/plain",
      "bytes": 1407,
      "sha256": "e3c065c7d93a9c2a745a12fee7e7f854a4121ca456147674dd1a13a47baf15c1",
      "rows": null,
      "license": null,
      "description": "Which license covers which file."
    },
    {
      "name": "CITATION.bib",
      "mediaType": "application/x-bibtex",
      "bytes": 386,
      "sha256": "2476fa6d0e378bef366d28a2b7fb12ce7399ac88e460930db74c9b525aedf864",
      "rows": null,
      "license": null,
      "description": "BibTeX entry for this release."
    }
  ],
  "changelog": {
    "summary": "Location basis for every mega project, re-researched site coordinates where a public source identifies the campus, and the first derived spatial facts: distance from each site-located project to the nearest 230 kV or higher transmission line.",
    "changes": [
      "Added location_basis to the mega project exports: site (campus footprint identified), address (public address, geocoded), city-centroid, or county-centroid. The JSON export also carries locationSource where the location comes from a different public source than the figures.",
      "Re-researched campus coordinates. Projects upgraded to site or address carry a new coordinate and a dated location source; centroid projects keep their previous coordinate.",
      "Added transmission proximity, derived in PostGIS from the HIFLD Electric Power Transmission Lines layer (data current to 2023-09-05) filtered to 230 kV and above: nearest line distance, voltage, and owner per project, and the count of site-located projects within 5 miles. The derived values live in derived-facts.json with their own measurement date and are not part of the frozen exports in this release.",
      "Only site- and address-located projects count toward any distance fact; centroid coordinates can sit several miles from the parcel, so the prose states the site-located denominator and excludes the rest.",
      "Methodology version 3."
    ]
  }
}