{
  "claims": [
    {
      "claim": {
        "claim_id": "claim-emigrant-western-crabtree-gem-table",
        "evidence_ids": [
          "evidence-emigrant-western-crabtree-gem-table"
        ],
        "predicate": "published_approach_distance_report",
        "spatial_scope_ids": [
          "scope-route-emigrant-crabtree-gem-lake"
        ],
        "subject_id": "route-emigrant-crabtree-gem-lake",
        "temporal_scope": null,
        "value": {
          "endpoint_precision": "destination unspecified",
          "not_atomic_distance": true,
          "reported_one_way_miles": 9.5,
          "source_edition": "2012-06"
        }
      },
      "evidence": [
        {
          "claim_id": "claim-emigrant-western-crabtree-gem-table",
          "evidence_id": "evidence-emigrant-western-crabtree-gem-table",
          "notes": "",
          "observation_id": "observation-emigrant-western-crabtree-gem-table",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [],
          "content": "ROG 16-27 June 2012, page 1: Crabtree column reports Gem Lake at 9.5 miles. Printed destination total; exact lake endpoint is unspecified.",
          "observation_id": "observation-emigrant-western-crabtree-gem-table",
          "observed_at": null,
          "observer": "Wayproof primary-source text, georeferenced map and named-feature review",
          "retrieved_at": "2026-10-06T07:44:34+00:00",
          "source_id": "source-usfs-emigrant-mileage-table"
        }
      ],
      "sources": [
        {
          "locator": "https://www.fs.usda.gov/sites/nfs/files/legacy-media/stanislaus/Trail%20Mileages%20-%20Emigrant%202012.pdf",
          "publisher": "USDA Forest Service, Stanislaus National Forest",
          "source_id": "source-usfs-emigrant-mileage-table"
        }
      ]
    },
    {
      "claim": {
        "claim_id": "claim-emigrant-western-gem-operator-mileage",
        "evidence_ids": [
          "evidence-emigrant-western-gem-operator-mileage"
        ],
        "predicate": "published_approach_distance_report",
        "spatial_scope_ids": [
          "scope-route-emigrant-crabtree-gem-lake"
        ],
        "subject_id": "route-emigrant-crabtree-gem-lake",
        "temporal_scope": null,
        "value": {
          "distance_convention": "not explicitly stated",
          "not_atomic_distance": true,
          "reported_miles": 10,
          "source_edition": "unknown",
          "travel_context": "operator riding destination"
        }
      },
      "evidence": [
        {
          "claim_id": "claim-emigrant-western-gem-operator-mileage",
          "evidence_id": "evidence-emigrant-western-gem-operator-mileage",
          "notes": "",
          "observation_id": "observation-emigrant-western-gem-operator-mileage",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [],
          "content": "Aspen Meadow Pack Station destination page reports 10 miles under its Crabtree destination hierarchy. Publication date, precise endpoint and one-way/round-trip convention are not stated; the operator describes riding destinations.",
          "observation_id": "observation-emigrant-western-gem-operator-mileage",
          "observed_at": null,
          "observer": "Wayproof primary-source text, georeferenced map and named-feature review",
          "retrieved_at": "2026-10-06T07:44:34+00:00",
          "source_id": "source-aspen-emigrant-gem"
        }
      ],
      "sources": [
        {
          "locator": "https://www.aspenmeadowpackstation.com/index.php/adventures-menu/destinations/crabtree-trail-head-menu/gem-menu",
          "publisher": "Aspen Meadow Pack Station",
          "source_id": "source-aspen-emigrant-gem"
        }
      ]
    }
  ],
  "entities": [
    {
      "entity_id": "route-emigrant-crabtree-gem-lake",
      "kind": "route",
      "name": "Crabtree to Gem Lake"
    }
  ],
  "history": [
    {
      "action": "ADD",
      "change_set_id": "wp-20261006-emigrant-western-coverage",
      "evidence_refs": [],
      "knowledge_gap_refs": [
        "gap-emigrant-western-gem-mileage"
      ],
      "path": "canonical/v0/gaps/gap-emigrant-western-gem-mileage.json",
      "reason": "Add bounded western approach, geometry and facility evidence; retain unresolved planning limits.",
      "record_id": "gap-emigrant-western-gem-mileage",
      "record_type": "gap",
      "summary": "Add six drawable western Emigrant approaches with shared physical segments, lake camping evidence and historical trailhead facilities."
    }
  ],
  "navigation": {
    "next_id": "gap-emigrant-western-gianelli-access",
    "position": 210,
    "previous_id": "gap-emigrant-western-crabtree-grouse-planning",
    "total": 299
  },
  "observations": [
    {
      "artifact_refs": [],
      "content": "ROG 16-27 June 2012, page 1: Crabtree column reports Gem Lake at 9.5 miles. Printed destination total; exact lake endpoint is unspecified.",
      "observation_id": "observation-emigrant-western-crabtree-gem-table",
      "observed_at": null,
      "observer": "Wayproof primary-source text, georeferenced map and named-feature review",
      "retrieved_at": "2026-10-06T07:44:34+00:00",
      "source_id": "source-usfs-emigrant-mileage-table"
    },
    {
      "artifact_refs": [],
      "content": "Aspen Meadow Pack Station destination page reports 10 miles under its Crabtree destination hierarchy. Publication date, precise endpoint and one-way/round-trip convention are not stated; the operator describes riding destinations.",
      "observation_id": "observation-emigrant-western-gem-operator-mileage",
      "observed_at": null,
      "observer": "Wayproof primary-source text, georeferenced map and named-feature review",
      "retrieved_at": "2026-10-06T07:44:34+00:00",
      "source_id": "source-aspen-emigrant-gem"
    }
  ],
  "record": {
    "gap_id": "gap-emigrant-western-gem-mileage",
    "question": "How does the operator Gem mileage compare with the Forest Service table?",
    "reason": "The 2012 Forest Service table reports 9.5 one-way miles from Crabtree; the undated operator page reports 10 miles without explicitly stating its distance convention or precise endpoint. They remain separate reports, not a resolved route total.",
    "related_ids": [
      "claim-emigrant-western-crabtree-gem-table",
      "claim-emigrant-western-gem-operator-mileage"
    ]
  },
  "record_type": "gap",
  "related_records": [
    {
      "record": {
        "claim_id": "claim-emigrant-western-crabtree-gem-table",
        "evidence_ids": [
          "evidence-emigrant-western-crabtree-gem-table"
        ],
        "predicate": "published_approach_distance_report",
        "spatial_scope_ids": [
          "scope-route-emigrant-crabtree-gem-lake"
        ],
        "subject_id": "route-emigrant-crabtree-gem-lake",
        "temporal_scope": null,
        "value": {
          "endpoint_precision": "destination unspecified",
          "not_atomic_distance": true,
          "reported_one_way_miles": 9.5,
          "source_edition": "2012-06"
        }
      },
      "record_id": "claim-emigrant-western-crabtree-gem-table",
      "record_type": "claim"
    },
    {
      "record": {
        "claim_id": "claim-emigrant-western-gem-operator-mileage",
        "evidence_ids": [
          "evidence-emigrant-western-gem-operator-mileage"
        ],
        "predicate": "published_approach_distance_report",
        "spatial_scope_ids": [
          "scope-route-emigrant-crabtree-gem-lake"
        ],
        "subject_id": "route-emigrant-crabtree-gem-lake",
        "temporal_scope": null,
        "value": {
          "distance_convention": "not explicitly stated",
          "not_atomic_distance": true,
          "reported_miles": 10,
          "source_edition": "unknown",
          "travel_context": "operator riding destination"
        }
      },
      "record_id": "claim-emigrant-western-gem-operator-mileage",
      "record_type": "claim"
    }
  ],
  "sources": [
    {
      "locator": "https://www.aspenmeadowpackstation.com/index.php/adventures-menu/destinations/crabtree-trail-head-menu/gem-menu",
      "publisher": "Aspen Meadow Pack Station",
      "source_id": "source-aspen-emigrant-gem"
    },
    {
      "locator": "https://www.fs.usda.gov/sites/nfs/files/legacy-media/stanislaus/Trail%20Mileages%20-%20Emigrant%202012.pdf",
      "publisher": "USDA Forest Service, Stanislaus National Forest",
      "source_id": "source-usfs-emigrant-mileage-table"
    }
  ]
}