{
  "total": 1,
  "source": "d1",
  "tracking_since": "2026-10-25T12:38:37.716Z",
  "source_rechecks": {
    "rows": 332,
    "series": 250,
    "last_checked_at": "2026-10-25T13:38:37.000Z",
    "latest_result_counts": {
      "confirmed": 240,
      "unreachable": 5,
      "needs_review": 4,
      "changed": 1
    },
    "method": "Each source URL is fetched and the recorded numbers are looked for in the page (PDFs via pdftotext); anything not confirmed is reviewed by a human. Log: /downloads/price_rechecks.jsonl"
  },
  "observations": [
    {
      "id": "po_20261026_21bef695f789",
      "series_key": "ps_d14cb6094aa39b31",
      "kind": "benchmark",
      "use_case_id": "autonomous-mining-haulage",
      "use_case_ids": [
        "autonomous-mining-haulage"
      ],
      "provider_id": null,
      "description": "Freeport-McMoRan Bagdad (Arizona) program to automate 33 large haul trucks, reported spend about $80 million (a whole-program figure, roughly $2.4M per truck, including scope beyond the trucks; AusIMM Bulletin, 27 Jun 2025)",
      "low": 80000000,
      "high": 80000000,
      "currency": "USD",
      "unit": "per program (33 trucks)",
      "region": "US",
      "source_url": "https://www.ausimm.com/bulletin/bulletin-articles/imarc-2025-productivity-and-innovation-spotlight-on-automation/",
      "as_of": "2025-06-27",
      "observed_at": "2026-10-26T12:31:34.422Z",
      "content_hash": "sha256:21bef695f789f8eee5e0f41a2c6d96d353051a4ecccdae9bdf28803977ce8060",
      "supersedes": null,
      "origin": "build",
      "change_reason": null,
      "current": true,
      "usd": {
        "currency": "USD",
        "low": 80000000,
        "high": 80000000,
        "note": "Already in target currency; no conversion."
      }
    }
  ],
  "series": [
    {
      "series_key": "ps_d14cb6094aa39b31",
      "kind": "benchmark",
      "use_case_id": "autonomous-mining-haulage",
      "provider_id": null,
      "description": "Freeport-McMoRan Bagdad (Arizona) program to automate 33 large haul trucks, reported spend about $80 million (a whole-program figure, roughly $2.4M per truck, including scope beyond the trucks; AusIMM Bulletin, 27 Jun 2025)",
      "currency": "USD",
      "unit": "per program (33 trucks)",
      "region": "US",
      "source_url": "https://www.ausimm.com/bulletin/bulletin-articles/imarc-2025-productivity-and-innovation-spotlight-on-automation/",
      "observations": 1,
      "first_observed_at": "2026-10-26T12:31:34.422Z",
      "last_observed_at": "2026-10-26T12:31:34.422Z",
      "current": true,
      "latest": {
        "low": 80000000,
        "high": 80000000,
        "as_of": "2025-06-27",
        "id": "po_20261026_21bef695f789"
      },
      "trend": null,
      "last_rechecked": null
    }
  ],
  "note": "Only one observation per series so far: we started recording every price on 2026-10-25 and re-check every source on a schedule. A trend appears when a re-checked source shows a different price (we never overwrite old observations).",
  "pagination": {
    "total": 1,
    "limit": 200,
    "offset": 0,
    "returned": 1,
    "next_offset": null,
    "next": null,
    "prev": null
  },
  "license": "Whirrwork (https://whirrwork.com), CC BY 4.0"
}