{
  "slug": "tt008.us-gateways.import-weight",
  "name": "Containerised import weight at US gateways",
  "unit": "tonnes/month",
  "horizon": "long",
  "grade": "reported",
  "grade_means": "Counted and published by a named body — for this ledger, the US Census Bureau. We mirror it and keep every revision.",
  "description": "Declared mass of containerised imports arriving at the eight US gateways TT-001 watches, summed across tracked origin countries. Census reports LA and Long Beach, New York and Newark, and Seattle and Tacoma separately; they are summed here to match the AIS coverage zones. Filed with customs under penalty, so this is counted rather than inferred.",
  "instrument": {
    "id": "TT-008",
    "name": "Port ledger",
    "clock": "medium",
    "role": "witness",
    "source": "US Census Bureau, intltrade/imports/porths",
    "source_url": "https://api.census.gov/data/timeseries/intltrade/imports/porths"
  },
  "coverage": {
    "from": "2026-01",
    "to": null
  },
  "publishable_ranges": [
    {
      "from": "2026-01",
      "to": "2100-01-01"
    }
  ],
  "status": "fit",
  "citation": "US Census Bureau, foreign trade port-level statistics (intltrade/imports/porths).",
  "citationShort": "Trimtab TT-008 Port ledger, \"Containerised import weight at US gateways\" (retrieved 2026-08-06).",
  "licence": "CC BY 4.0",
  "retrieved_at": "2026-08-06T12:51:57.257Z",
  "urls": {
    "page": "https://trimtabist.com/series/tt008.us-gateways.import-weight",
    "csv": "https://trimtabist.com/series/tt008.us-gateways.import-weight.csv",
    "metadata": "https://trimtabist.com/series/tt008.us-gateways.import-weight.metadata.json"
  }
}