{
  "title": "Shale Scow",
  "era": "Working cargo-scow interpretation, before 1903",
  "version": "1.1",
  "modelStatus": "Interpretive reconstruction; no original lines plan recovered",
  "detailLevel": "full",
  "units": "metres",
  "axes": {
    "up": "+Y",
    "bow": "-X",
    "starboard": "+Z"
  },
  "historicalDimensions": {
    "lengthFeet": 100,
    "beamFeet": 24,
    "depthOfHoldFeet": null,
    "beamInferred": true,
    "holdDepthUnknown": true,
    "dimensionsSourceQuality": "Selected documentary baseline; see vessel research notes for length and beam conflicts"
  },
  "geometryReference": {
    "hullBowX": -15.24,
    "hullSternX": 15.24,
    "deckY": 2.1,
    "waterlineY": 1.35,
    "waterlineIsInferred": true
  },
  "bounds": {
    "min": [
      -15.288421945530503,
      0.0050000000000000044,
      -3.742600000000001
    ],
    "max": [
      15.325000000000001,
      3.327965397847276,
      3.742600000000001
    ]
  },
  "triangleCount": 39858,
  "trianglesByGroup": {
    "hull": 13006,
    "bulwarks": 9154,
    "fittings": 3140,
    "deck": 6674,
    "cargo_hatches": 180,
    "hatch_covers": 684,
    "deck_cargo": 7020
  },
  "drawCalls": 21,
  "mastCount": 0,
  "supportsSails": false,
  "visibilityNodes": {
    "cargo": "deck_cargo"
  },
  "deployedSailCount": 0,
  "inferredFeatures": [
    "Underwater hull lines and draft",
    "Exact colors, fittings, hatch layout and rigging routes"
  ],
  "configurationCaveat": "The preserve identifies a 100 ft scow associated with the cement dock. A simple flat-bottom cargo lighter is a type-based reconstruction. Beam, side height, cargo containment and deck arrangement are inferred; no crane, hopper doors or propulsion is asserted. Shale load is illustrative.",
  "sources": [
    {
      "title": "Grand Traverse preserve vessel description",
      "url": "https://www.michiganpreserves.org/grand-traverse-bay-underwater-preserve/"
    },
    {
      "title": "Survey of local scow-towing context, Albatross report",
      "url": "https://nasnmc.com/images/naspics/PDFs/Albatross.pdf"
    }
  ],
  "revisedDate": "2026-09-08",
  "revisionNote": "Added sourced documentary features and repaired metadata and research-note formatting; this collection cleanup is not a new full historical or geometry audit.",
  "documentedFeatures": [
    "The preserve identifies a 100 ft scow lost at the Elk Rapids Cement Company dock in 1903. [Grand Traverse preserve vessel description](https://www.michiganpreserves.org/grand-traverse-bay-underwater-preserve/)"
  ]
}