{
  "claims": [
    {
      "claim": {
        "claim_id": "claim-emigrant-western-grouse-approach-topology",
        "evidence_ids": [
          "evidence-emigrant-western-grouse-approach-topology"
        ],
        "predicate": "mapped_route_connector",
        "spatial_scope_ids": [
          "scope-route-emigrant-bell-meadow-grouse-lake",
          "scope-route-emigrant-crabtree-grouse-lake"
        ],
        "subject_id": "route-segment-emigrant-western-grouse-approach",
        "temporal_scope": null,
        "value": {
          "distance_miles": null,
          "distance_status": "not_printed",
          "end_node_id": "route-node-emigrant-grouse-north-approach",
          "route_role": "official_mainline",
          "start_node_id": "route-node-emigrant-grouse-display-break",
          "support": "20E17 continues along the north side of Grouse; lake detail map labels To Crabtree Trailhead"
        }
      },
      "evidence": [
        {
          "claim_id": "claim-emigrant-western-grouse-approach-topology",
          "evidence_id": "evidence-emigrant-western-grouse-approach-topology",
          "notes": "",
          "observation_id": "observation-emigrant-western-grouse-approach-topology",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [],
          "content": "2010 overview western panel, corroborated by lake detail maps and named USFS trail features: 20E17 continues along the north side of Grouse; lake detail map labels To Crabtree Trailhead. Segmentation at source breaks and chosen trail approach vertices is descriptive, not a claim of an official named junction. No atomic mileage assigned from cumulative reports or GIS lengths.",
          "observation_id": "observation-emigrant-western-grouse-approach-topology",
          "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-grouse-camping-map"
        }
      ],
      "sources": [
        {
          "locator": "https://www.fs.usda.gov/sites/nfs/files/legacy-media/stanislaus/Grouse%20Lake%20-%20Minimum%20Camping%20Distances%202021.pdf",
          "publisher": "USDA Forest Service, Stanislaus National Forest",
          "source_id": "source-usfs-emigrant-grouse-camping-map"
        }
      ]
    },
    {
      "claim": {
        "claim_id": "claim-emigrant-western-grouse-exclusion",
        "evidence_ids": [
          "evidence-emigrant-western-grouse-exclusion"
        ],
        "predicate": "camping_exclusion",
        "spatial_scope_ids": [
          "scope-waterbody-emigrant-grouse-lake"
        ],
        "subject_id": "waterbody-emigrant-grouse-lake",
        "temporal_scope": null,
        "value": {
          "camping": "prohibited by mapped minimum distances",
          "individual_sites": "not inventoried",
          "location": "between trail and Grouse Lake"
        }
      },
      "evidence": [
        {
          "claim_id": "claim-emigrant-western-grouse-exclusion",
          "evidence_id": "evidence-emigrant-western-grouse-exclusion",
          "notes": "",
          "observation_id": "observation-emigrant-western-grouse-exclusion",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [],
          "content": "Grouse Lake minimum camping map states no legal place to camp between the trail and lake because of their proximity.",
          "observation_id": "observation-emigrant-western-grouse-exclusion",
          "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-grouse-camping-map"
        }
      ],
      "sources": [
        {
          "locator": "https://www.fs.usda.gov/sites/nfs/files/legacy-media/stanislaus/Grouse%20Lake%20-%20Minimum%20Camping%20Distances%202021.pdf",
          "publisher": "USDA Forest Service, Stanislaus National Forest",
          "source_id": "source-usfs-emigrant-grouse-camping-map"
        }
      ]
    },
    {
      "claim": {
        "claim_id": "claim-emigrant-western-grouse-identity",
        "evidence_ids": [
          "evidence-emigrant-western-grouse-identity"
        ],
        "predicate": "mapped_lake_identity",
        "spatial_scope_ids": [
          "scope-waterbody-emigrant-grouse-lake"
        ],
        "subject_id": "waterbody-emigrant-grouse-lake",
        "temporal_scope": null,
        "value": {
          "campsites": "not inventoried",
          "name": "Grouse Lake",
          "shoreline_geometry": "not imported",
          "water_availability": "unknown",
          "wilderness": "wilderness-emigrant"
        }
      },
      "evidence": [
        {
          "claim_id": "claim-emigrant-western-grouse-identity",
          "evidence_id": "evidence-emigrant-western-grouse-identity",
          "notes": "",
          "observation_id": "observation-emigrant-western-grouse-identity",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [],
          "content": "Official Emigrant map names Grouse Lake within the wilderness and depicts its trail approach. The lake is distinct from the trail display endpoint.",
          "observation_id": "observation-emigrant-western-grouse-identity",
          "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-grouse-camping-map"
        }
      ],
      "sources": [
        {
          "locator": "https://www.fs.usda.gov/sites/nfs/files/legacy-media/stanislaus/Grouse%20Lake%20-%20Minimum%20Camping%20Distances%202021.pdf",
          "publisher": "USDA Forest Service, Stanislaus National Forest",
          "source_id": "source-usfs-emigrant-grouse-camping-map"
        }
      ]
    },
    {
      "claim": {
        "claim_id": "claim-emigrant-western-grouse-minimum",
        "evidence_ids": [
          "evidence-emigrant-western-grouse-minimum"
        ],
        "predicate": "camping_setback",
        "spatial_scope_ids": [
          "scope-waterbody-emigrant-grouse-lake"
        ],
        "subject_id": "waterbody-emigrant-grouse-lake",
        "temporal_scope": null,
        "value": {
          "from": [
            "water",
            "trails",
            "posted signs"
          ],
          "map_is_reference_only": true,
          "minimum_feet": 100
        }
      },
      "evidence": [
        {
          "claim_id": "claim-emigrant-western-grouse-minimum",
          "evidence_id": "evidence-emigrant-western-grouse-minimum",
          "notes": "",
          "observation_id": "observation-emigrant-western-grouse-minimum",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [],
          "content": "Minimum Camping Distance Map, page 1 (2021 filename): camping less than 100 feet from water, trails or posted signs is prohibited; map is reference only.",
          "observation_id": "observation-emigrant-western-grouse-minimum",
          "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-grouse-camping-map"
        }
      ],
      "sources": [
        {
          "locator": "https://www.fs.usda.gov/sites/nfs/files/legacy-media/stanislaus/Grouse%20Lake%20-%20Minimum%20Camping%20Distances%202021.pdf",
          "publisher": "USDA Forest Service, Stanislaus National Forest",
          "source_id": "source-usfs-emigrant-grouse-camping-map"
        }
      ]
    },
    {
      "claim": {
        "claim_id": "claim-emigrant-western-grouse-recommendation",
        "evidence_ids": [
          "evidence-emigrant-western-grouse-recommendation"
        ],
        "predicate": "camping_setback_recommendation",
        "spatial_scope_ids": [
          "scope-waterbody-emigrant-grouse-lake"
        ],
        "subject_id": "waterbody-emigrant-grouse-lake",
        "temporal_scope": null,
        "value": {
          "basis": "Leave No Trace; not asserted regulatory minimum",
          "recommended_feet": 200
        }
      },
      "evidence": [
        {
          "claim_id": "claim-emigrant-western-grouse-recommendation",
          "evidence_id": "evidence-emigrant-western-grouse-recommendation",
          "notes": "",
          "observation_id": "observation-emigrant-western-grouse-recommendation",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [],
          "content": "Minimum Camping Distance Map, page 1 (2021 filename): 200 feet is the Leave No Trace recommendation, distinct from the 100-foot minimum.",
          "observation_id": "observation-emigrant-western-grouse-recommendation",
          "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-grouse-camping-map"
        }
      ],
      "sources": [
        {
          "locator": "https://www.fs.usda.gov/sites/nfs/files/legacy-media/stanislaus/Grouse%20Lake%20-%20Minimum%20Camping%20Distances%202021.pdf",
          "publisher": "USDA Forest Service, Stanislaus National Forest",
          "source_id": "source-usfs-emigrant-grouse-camping-map"
        }
      ]
    }
  ],
  "entities": [
    {
      "entity_id": "route-segment-emigrant-western-grouse-approach",
      "kind": "route_segment",
      "name": "Grouse Approach"
    },
    {
      "entity_id": "waterbody-emigrant-grouse-lake",
      "kind": "waterbody",
      "name": "Grouse Lake (Emigrant Wilderness)"
    }
  ],
  "history": [
    {
      "action": "ADD",
      "change_set_id": "wp-20261006-emigrant-western-coverage",
      "evidence_refs": [],
      "knowledge_gap_refs": [],
      "path": "canonical/v0/sources/source-usfs-emigrant-grouse-camping-map.json",
      "reason": "Add bounded western approach, geometry and facility evidence; retain unresolved planning limits.",
      "record_id": "source-usfs-emigrant-grouse-camping-map",
      "record_type": "source",
      "summary": "Add six drawable western Emigrant approaches with shared physical segments, lake camping evidence and historical trailhead facilities."
    }
  ],
  "navigation": {
    "next_id": "source-usfs-emigrant-horse-camping-2020",
    "position": 534,
    "previous_id": "source-usfs-emigrant-favorite-hikes",
    "total": 587
  },
  "observations": [
    {
      "artifact_refs": [],
      "content": "2010 overview western panel, corroborated by lake detail maps and named USFS trail features: 20E17 continues along the north side of Grouse; lake detail map labels To Crabtree Trailhead. Segmentation at source breaks and chosen trail approach vertices is descriptive, not a claim of an official named junction. No atomic mileage assigned from cumulative reports or GIS lengths.",
      "observation_id": "observation-emigrant-western-grouse-approach-topology",
      "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-grouse-camping-map"
    },
    {
      "artifact_refs": [],
      "content": "Grouse Lake minimum camping map states no legal place to camp between the trail and lake because of their proximity.",
      "observation_id": "observation-emigrant-western-grouse-exclusion",
      "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-grouse-camping-map"
    },
    {
      "artifact_refs": [],
      "content": "Official Emigrant map names Grouse Lake within the wilderness and depicts its trail approach. The lake is distinct from the trail display endpoint.",
      "observation_id": "observation-emigrant-western-grouse-identity",
      "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-grouse-camping-map"
    },
    {
      "artifact_refs": [],
      "content": "Minimum Camping Distance Map, page 1 (2021 filename): camping less than 100 feet from water, trails or posted signs is prohibited; map is reference only.",
      "observation_id": "observation-emigrant-western-grouse-minimum",
      "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-grouse-camping-map"
    },
    {
      "artifact_refs": [],
      "content": "Minimum Camping Distance Map, page 1 (2021 filename): 200 feet is the Leave No Trace recommendation, distinct from the 100-foot minimum.",
      "observation_id": "observation-emigrant-western-grouse-recommendation",
      "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-grouse-camping-map"
    }
  ],
  "record": {
    "locator": "https://www.fs.usda.gov/sites/nfs/files/legacy-media/stanislaus/Grouse%20Lake%20-%20Minimum%20Camping%20Distances%202021.pdf",
    "publisher": "USDA Forest Service, Stanislaus National Forest",
    "source_id": "source-usfs-emigrant-grouse-camping-map"
  },
  "record_type": "source",
  "related_records": [],
  "sources": [
    {
      "locator": "https://www.fs.usda.gov/sites/nfs/files/legacy-media/stanislaus/Grouse%20Lake%20-%20Minimum%20Camping%20Distances%202021.pdf",
      "publisher": "USDA Forest Service, Stanislaus National Forest",
      "source_id": "source-usfs-emigrant-grouse-camping-map"
    }
  ]
}