{
  "version": "2026-09-14",
  "snapshotAt": "2026-09-15",
  "methodologyVersion": "2",
  "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": 19856,
      "sha256": "43e4875e50a30799a203f94a15084ce4e08c1b189ec0dbb1bc91083ad29350c1",
      "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": 49368,
      "sha256": "4c7a849ade8a9a2dc6357f40f2c08425740acd65fcefa6aa1aa5184b6f8b17fd",
      "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": 8956,
      "sha256": "6bbb8668d4d95137a9d575e00eab41821f82ada427bec2dfb9af45711ec7891c",
      "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": "f8fca218402d5719c900099783582904cef48d93fd1a32745ce7c7f5535ae61e",
      "rows": null,
      "license": null,
      "description": "Which license covers which file."
    },
    {
      "name": "CITATION.bib",
      "mediaType": "application/x-bibtex",
      "bytes": 386,
      "sha256": "8a831c0ff1df951c89a7e86e06c711e68f13cf39cd9034381cd5eef4fb52bbb9",
      "rows": null,
      "license": null,
      "description": "BibTeX entry for this release."
    }
  ],
  "changelog": {
    "summary": "Full OSM facility refresh, every mega project re-researched against a dated public source, per-figure basis and confidence columns, and state estimates reconciled to the national count.",
    "changes": [
      "Refreshed the OpenStreetMap facility layer through the Overpass API and reassigned every facility to a jurisdiction by point-in-polygon against Census boundaries.",
      "Re-researched all tracked mega projects. Each now carries a public capacity figure, a public investment figure, a source (label, URL, date), a capacity basis, an investment basis, and a confidence rating. Projects with no public figure for either were retired rather than estimated.",
      "Added the columns capacity_basis, investment_basis, is_estimate, confidence, included_in_aggregate, comparable_campus_investment, source_label, source_url, source_date, last_verified_at, and url to the mega project exports.",
      "State estimates now reconcile to the Baxtel national count exactly (methodology version 2). This derivation landed on 2026-09-15, after the data refresh date, so estimated_total values in this release differ from the site as served on 2026-09-14 while osm_verified values do not.",
      "Coverage is 46 states, the District of Columbia, and Puerto Rico.",
      "First frozen release. Earlier versions were served only at the moving URLs and cannot be reproduced byte for byte."
    ]
  }
}