{
  "claims": [
    {
      "claim": {
        "claim_id": "claim-del-valle-map-eagles-view-location",
        "evidence_ids": [
          "evidence-del-valle-map-eagles-view-location"
        ],
        "predicate": "official_map_location_context",
        "spatial_scope_ids": [
          "scope-del-valle-park"
        ],
        "subject_id": "group-camp-del-valle-eagles-view",
        "temporal_scope": null,
        "value": {
          "adjacent_to": "parking area 66",
          "east_of": "Lake Del Valle",
          "northwest_of": "park entry kiosk",
          "west_of": "Del Valle Road"
        }
      },
      "evidence": [
        {
          "claim_id": "claim-del-valle-map-eagles-view-location",
          "evidence_id": "evidence-del-valle-map-eagles-view-location",
          "notes": "Official cartographic placement without deriving a surveyed point coordinate.",
          "observation_id": "observation-del-valle-map-eagles-view-location",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [
            "PDF page 1",
            "Eagles View Group Camp label"
          ],
          "content": "The April 2026 official park map labels Eagles View Group Camp east of Lake Del Valle and west of Del Valle Road, adjacent to parking area 66 and northwest of the park entry kiosk.",
          "observation_id": "observation-del-valle-map-eagles-view-location",
          "observed_at": "2026-04-01T00:00:00+00:00",
          "observer": "Wayproof visual map review",
          "retrieved_at": "2026-09-20T00:00:00+00:00",
          "source_id": "source-ebrpd-del-valle-map-2026-04"
        }
      ],
      "sources": [
        {
          "locator": "https://www.ebparks.org/sites/default/files/del-valle-map.pdf",
          "publisher": "East Bay Regional Park District",
          "source_id": "source-ebrpd-del-valle-map-2026-04"
        }
      ]
    },
    {
      "claim": {
        "claim_id": "claim-del-valle-map-facility-topology",
        "evidence_ids": [
          "evidence-del-valle-map-facility-topology"
        ],
        "predicate": "mapped_facilities",
        "spatial_scope_ids": [
          "scope-del-valle-park"
        ],
        "subject_id": "park-del-valle-regional-park",
        "temporal_scope": {
          "ends_on": null,
          "starts_on": "2026-04-01"
        },
        "value": [
          "main entrance",
          "Arroyo staging",
          "family campground",
          "group camps",
          "horse camps",
          "picnic areas",
          "swim beaches",
          "visitor center",
          "marina",
          "boat launch",
          "boat inspection station"
        ]
      },
      "evidence": [
        {
          "claim_id": "claim-del-valle-map-facility-topology",
          "evidence_id": "evidence-del-valle-map-facility-topology",
          "notes": "",
          "observation_id": "observation-del-valle-map-2026",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [
            "PDF page 1"
          ],
          "content": "The map is revised 2026/4 and depicts park entrances, staging, parking counts, trails and mileages, beaches, campground and group sites, picnic areas, visitor center, marina, launch, inspection station, restricted areas, and accessibility symbols.",
          "observation_id": "observation-del-valle-map-2026",
          "observed_at": "2026-04-01T00:00:00+00:00",
          "observer": "Wayproof source review",
          "retrieved_at": "2026-09-20T00:00:00+00:00",
          "source_id": "source-ebrpd-del-valle-map-2026-04"
        }
      ],
      "sources": [
        {
          "locator": "https://www.ebparks.org/sites/default/files/del-valle-map.pdf",
          "publisher": "East Bay Regional Park District",
          "source_id": "source-ebrpd-del-valle-map-2026-04"
        }
      ]
    },
    {
      "claim": {
        "claim_id": "claim-del-valle-map-revision-2026-04",
        "evidence_ids": [
          "evidence-del-valle-map-revision-2026-04"
        ],
        "predicate": "map_revision",
        "spatial_scope_ids": [
          "scope-del-valle-park"
        ],
        "subject_id": "park-del-valle-regional-park",
        "temporal_scope": {
          "ends_on": "2026-04-30",
          "starts_on": "2026-04-01"
        },
        "value": "2026-04"
      },
      "evidence": [
        {
          "claim_id": "claim-del-valle-map-revision-2026-04",
          "evidence_id": "evidence-del-valle-map-revision-2026-04",
          "notes": "",
          "observation_id": "observation-del-valle-map-2026",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [
            "PDF page 1"
          ],
          "content": "The map is revised 2026/4 and depicts park entrances, staging, parking counts, trails and mileages, beaches, campground and group sites, picnic areas, visitor center, marina, launch, inspection station, restricted areas, and accessibility symbols.",
          "observation_id": "observation-del-valle-map-2026",
          "observed_at": "2026-04-01T00:00:00+00:00",
          "observer": "Wayproof source review",
          "retrieved_at": "2026-09-20T00:00:00+00:00",
          "source_id": "source-ebrpd-del-valle-map-2026-04"
        }
      ],
      "sources": [
        {
          "locator": "https://www.ebparks.org/sites/default/files/del-valle-map.pdf",
          "publisher": "East Bay Regional Park District",
          "source_id": "source-ebrpd-del-valle-map-2026-04"
        }
      ]
    },
    {
      "claim": {
        "claim_id": "claim-del-valle-map-route-disclosure",
        "evidence_ids": [
          "evidence-del-valle-map-route-disclosure"
        ],
        "predicate": "mapped_route_information",
        "spatial_scope_ids": [
          "scope-del-valle-park"
        ],
        "subject_id": "park-del-valle-regional-park",
        "temporal_scope": {
          "ends_on": null,
          "starts_on": "2026-04-01"
        },
        "value": {
          "badger_cove_to_arroyo_road_miles": 5.14,
          "mode_specific_trails": true,
          "ohlone_connection": [
            "Sunol Wilderness",
            "Mission Peak"
          ]
        }
      },
      "evidence": [
        {
          "claim_id": "claim-del-valle-map-route-disclosure",
          "evidence_id": "evidence-del-valle-map-route-disclosure",
          "notes": "",
          "observation_id": "observation-del-valle-map-trails",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [
            "PDF page 1"
          ],
          "content": "The map distinguishes hiker-horse-bicycle, hiker-horse, hiker-bicycle, and paved hiker-bicycle trails; labels the Ohlone connection toward Sunol and Mission Peak; and states 5.14 miles from Badger Cove to Arroyo Road.",
          "observation_id": "observation-del-valle-map-trails",
          "observed_at": "2026-04-01T00:00:00+00:00",
          "observer": "Wayproof source review",
          "retrieved_at": "2026-09-20T00:00:00+00:00",
          "source_id": "source-ebrpd-del-valle-map-2026-04"
        }
      ],
      "sources": [
        {
          "locator": "https://www.ebparks.org/sites/default/files/del-valle-map.pdf",
          "publisher": "East Bay Regional Park District",
          "source_id": "source-ebrpd-del-valle-map-2026-04"
        }
      ]
    },
    {
      "claim": {
        "claim_id": "claim-del-valle-map-use-restrictions",
        "evidence_ids": [
          "evidence-del-valle-map-use-restrictions"
        ],
        "predicate": "mapped_use_restrictions",
        "spatial_scope_ids": [
          "scope-del-valle-park"
        ],
        "subject_id": "park-del-valle-regional-park",
        "temporal_scope": {
          "ends_on": null,
          "starts_on": "2026-04-01"
        },
        "value": {
          "horses_prohibited": [
            "developed_areas",
            "grassy_lawns",
            "picnic_areas",
            "east_beach",
            "west_beach"
          ],
          "land_bank_access": false,
          "no_fishing_shoreline_segment": true,
          "swimming": "designated_beach_areas_only"
        }
      },
      "evidence": [
        {
          "claim_id": "claim-del-valle-map-use-restrictions",
          "evidence_id": "evidence-del-valle-map-use-restrictions",
          "notes": "",
          "observation_id": "observation-del-valle-map-rules",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [
            "PDF page 1"
          ],
          "content": "The map requires swimming in designated swim-beach areas, marks a no-fishing shoreline segment, prohibits horses in developed, lawn, picnic, and East/West Beach areas, and marks EBRPD land bank as no access.",
          "observation_id": "observation-del-valle-map-rules",
          "observed_at": "2026-04-01T00:00:00+00:00",
          "observer": "Wayproof source review",
          "retrieved_at": "2026-09-20T00:00:00+00:00",
          "source_id": "source-ebrpd-del-valle-map-2026-04"
        }
      ],
      "sources": [
        {
          "locator": "https://www.ebparks.org/sites/default/files/del-valle-map.pdf",
          "publisher": "East Bay Regional Park District",
          "source_id": "source-ebrpd-del-valle-map-2026-04"
        }
      ]
    }
  ],
  "entities": [
    {
      "entity_id": "group-camp-del-valle-eagles-view",
      "kind": "group_campsite",
      "name": "Eagles View"
    },
    {
      "entity_id": "park-del-valle-regional-park",
      "kind": "park",
      "name": "Del Valle Regional Park"
    }
  ],
  "history": [
    {
      "action": "ADD",
      "change_set_id": "wp-20260920-del-valle-map-picnic-fishing",
      "evidence_refs": [],
      "knowledge_gap_refs": [],
      "path": "canonical/v0/sources/source-ebrpd-del-valle-map-2026-04.json",
      "reason": "Add the April 2026 Del Valle map plus official picnic and fishing evidence, preserving applicability gaps.",
      "record_id": "source-ebrpd-del-valle-map-2026-04",
      "record_type": "source",
      "summary": "Ingest the April 2026 park map, picnic inventory, and fishing requirements with explicit conflicts and spatial gaps."
    }
  ],
  "navigation": {
    "next_id": "source-ebrpd-del-valle-park-page",
    "position": 33,
    "previous_id": "source-ebrpd-del-valle-camping",
    "total": 587
  },
  "observations": [
    {
      "artifact_refs": [
        "PDF page 1"
      ],
      "content": "The map is revised 2026/4 and depicts park entrances, staging, parking counts, trails and mileages, beaches, campground and group sites, picnic areas, visitor center, marina, launch, inspection station, restricted areas, and accessibility symbols.",
      "observation_id": "observation-del-valle-map-2026",
      "observed_at": "2026-04-01T00:00:00+00:00",
      "observer": "Wayproof source review",
      "retrieved_at": "2026-09-20T00:00:00+00:00",
      "source_id": "source-ebrpd-del-valle-map-2026-04"
    },
    {
      "artifact_refs": [
        "PDF page 1",
        "Eagles View Group Camp label"
      ],
      "content": "The April 2026 official park map labels Eagles View Group Camp east of Lake Del Valle and west of Del Valle Road, adjacent to parking area 66 and northwest of the park entry kiosk.",
      "observation_id": "observation-del-valle-map-eagles-view-location",
      "observed_at": "2026-04-01T00:00:00+00:00",
      "observer": "Wayproof visual map review",
      "retrieved_at": "2026-09-20T00:00:00+00:00",
      "source_id": "source-ebrpd-del-valle-map-2026-04"
    },
    {
      "artifact_refs": [
        "PDF page 1"
      ],
      "content": "The map requires swimming in designated swim-beach areas, marks a no-fishing shoreline segment, prohibits horses in developed, lawn, picnic, and East/West Beach areas, and marks EBRPD land bank as no access.",
      "observation_id": "observation-del-valle-map-rules",
      "observed_at": "2026-04-01T00:00:00+00:00",
      "observer": "Wayproof source review",
      "retrieved_at": "2026-09-20T00:00:00+00:00",
      "source_id": "source-ebrpd-del-valle-map-2026-04"
    },
    {
      "artifact_refs": [
        "PDF page 1"
      ],
      "content": "The map distinguishes hiker-horse-bicycle, hiker-horse, hiker-bicycle, and paved hiker-bicycle trails; labels the Ohlone connection toward Sunol and Mission Peak; and states 5.14 miles from Badger Cove to Arroyo Road.",
      "observation_id": "observation-del-valle-map-trails",
      "observed_at": "2026-04-01T00:00:00+00:00",
      "observer": "Wayproof source review",
      "retrieved_at": "2026-09-20T00:00:00+00:00",
      "source_id": "source-ebrpd-del-valle-map-2026-04"
    }
  ],
  "record": {
    "locator": "https://www.ebparks.org/sites/default/files/del-valle-map.pdf",
    "publisher": "East Bay Regional Park District",
    "source_id": "source-ebrpd-del-valle-map-2026-04"
  },
  "record_type": "source",
  "related_records": [],
  "sources": [
    {
      "locator": "https://www.ebparks.org/sites/default/files/del-valle-map.pdf",
      "publisher": "East Bay Regional Park District",
      "source_id": "source-ebrpd-del-valle-map-2026-04"
    }
  ]
}