{
  "claims": [
    {
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          "evidence-tilden-central-park-drive-weekday-closure-2026"
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          "ends_on": "2026-09-25",
          "starts_on": "2026-09-22"
        },
        "value": {
          "detours": [
            "vehicles",
            "cyclists",
            "hikers"
          ],
          "facilities_at_both_ends": "open",
          "reason": "fuels management work",
          "segment": "between Merry-Go-Round and Meadows Picnic Area",
          "status": "closed_weekdays",
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        }
      },
      "evidence": [
        {
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        }
      ],
      "observations": [
        {
          "artifact_refs": [
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            "Hiking and Biking"
          ],
          "content": "The live Tilden page identifies named entrances and staging areas, maps them to visitor destinations, publishes current road and trail disruptions, and describes Inspiration Point as the preferred access for Nimitz Way.",
          "observation_id": "observation-ebrpd-tilden-access-conditions-20260922",
          "observed_at": null,
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        }
      ],
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        {
          "locator": "https://www.ebparks.org/parks/tilden",
          "publisher": "East Bay Regional Park District",
          "source_id": "source-ebrpd-tilden-park-page"
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      ]
    },
    {
      "claim": {
        "claim_id": "claim-tilden-laurel-canyon-trail-closure-2026",
        "evidence_ids": [
          "evidence-tilden-laurel-canyon-trail-closure-2026"
        ],
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        "subject_id": "park-charles-lee-tilden-regional-park",
        "temporal_scope": {
          "ends_on": null,
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        },
        "value": {
          "reason": "storm damage",
          "segment": "upper 0.43 miles of Laurel Canyon Trail",
          "source_updated_on": "2026-09-22",
          "status": "closed",
          "until": "further notice"
        }
      },
      "evidence": [
        {
          "claim_id": "claim-tilden-laurel-canyon-trail-closure-2026",
          "evidence_id": "evidence-tilden-laurel-canyon-trail-closure-2026",
          "notes": "Current or recurring access notice published on the official Tilden park page; recheck before travel.",
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          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [
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          ],
          "content": "The live Tilden page identifies named entrances and staging areas, maps them to visitor destinations, publishes current road and trail disruptions, and describes Inspiration Point as the preferred access for Nimitz Way.",
          "observation_id": "observation-ebrpd-tilden-access-conditions-20260922",
          "observed_at": null,
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        }
      ],
      "sources": [
        {
          "locator": "https://www.ebparks.org/parks/tilden",
          "publisher": "East Bay Regional Park District",
          "source_id": "source-ebrpd-tilden-park-page"
        }
      ]
    },
    {
      "claim": {
        "claim_id": "claim-tilden-nimitz-way-access-profile",
        "evidence_ids": [
          "evidence-tilden-nimitz-way-access-profile"
        ],
        "predicate": "route_access_profile",
        "spatial_scope_ids": [
          "scope-staging-tilden-inspiration-point"
        ],
        "subject_id": "route-tilden-nimitz-way",
        "temporal_scope": null,
        "value": {
          "best_parking": "Tilden Inspiration Point Parking Lot",
          "dogs_must_be_leashed": true,
          "drinking_water_at_staging": false,
          "surface": "paved",
          "uses": [
            "hiking",
            "bicycling",
            "equestrian"
          ],
          "wheelchair_accessible": true
        }
      },
      "evidence": [
        {
          "claim_id": "claim-tilden-nimitz-way-access-profile",
          "evidence_id": "evidence-tilden-nimitz-way-access-profile",
          "notes": "Official hiking, biking, and accessibility guidance for Nimitz Way and Inspiration Point.",
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      ],
      "observations": [
        {
          "artifact_refs": [
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        }
      ],
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        {
          "locator": "https://www.ebparks.org/parks/tilden",
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        }
      ]
    },
    {
      "claim": {
        "claim_id": "claim-tilden-south-park-drive-newt-closure",
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          "evidence-tilden-south-park-drive-newt-closure"
        ],
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        "spatial_scope_ids": [
          "scope-charles-lee-tilden-regional-park"
        ],
        "subject_id": "park-charles-lee-tilden-regional-park",
        "temporal_scope": null,
        "value": {
          "annual_window": "November 1 through April 1",
          "non_auto_access": "not stated as closed",
          "reason": "protect migrating newts",
          "road": "South Park Drive",
          "status": "closed_to_automobiles"
        }
      },
      "evidence": [
        {
          "claim_id": "claim-tilden-south-park-drive-newt-closure",
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        }
      ],
      "observations": [
        {
          "artifact_refs": [
            "Current notices",
            "To Reach The Park",
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            "Hiking and Biking"
          ],
          "content": "The live Tilden page identifies named entrances and staging areas, maps them to visitor destinations, publishes current road and trail disruptions, and describes Inspiration Point as the preferred access for Nimitz Way.",
          "observation_id": "observation-ebrpd-tilden-access-conditions-20260922",
          "observed_at": null,
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          "source_id": "source-ebrpd-tilden-park-page"
        }
      ],
      "sources": [
        {
          "locator": "https://www.ebparks.org/parks/tilden",
          "publisher": "East Bay Regional Park District",
          "source_id": "source-ebrpd-tilden-park-page"
        }
      ]
    },
    {
      "claim": {
        "claim_id": "claim-tilden-wildcat-gorge-trail-closure-2026",
        "evidence_ids": [
          "evidence-tilden-wildcat-gorge-trail-closure-2026"
        ],
        "predicate": "trail_access_status",
        "spatial_scope_ids": [
          "scope-charles-lee-tilden-regional-park"
        ],
        "subject_id": "park-charles-lee-tilden-regional-park",
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          "ends_on": null,
          "starts_on": "2026-09-22"
        },
        "value": {
          "planned_reopening": "January 2027",
          "reason": "Wildcat Creek restoration",
          "segment": "Wildcat Gorge Trail near Brook Road",
          "status": "closed"
        }
      },
      "evidence": [
        {
          "claim_id": "claim-tilden-wildcat-gorge-trail-closure-2026",
          "evidence_id": "evidence-tilden-wildcat-gorge-trail-closure-2026",
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        }
      ],
      "observations": [
        {
          "artifact_refs": [
            "Current notices",
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          ],
          "content": "The live Tilden page identifies named entrances and staging areas, maps them to visitor destinations, publishes current road and trail disruptions, and describes Inspiration Point as the preferred access for Nimitz Way.",
          "observation_id": "observation-ebrpd-tilden-access-conditions-20260922",
          "observed_at": null,
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          "retrieved_at": "2026-09-22T15:30:00+00:00",
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      ],
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        {
          "locator": "https://www.ebparks.org/parks/tilden",
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      ]
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  ],
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    {
      "entity_id": "park-charles-lee-tilden-regional-park",
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      "name": "Charles Lee Tilden Regional Park"
    },
    {
      "entity_id": "route-tilden-nimitz-way",
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    }
  ],
  "history": [
    {
      "action": "ADD",
      "change_set_id": "wp-20260922-tilden-access-routes-conditions",
      "evidence_refs": [],
      "knowledge_gap_refs": [],
      "path": "canonical/v0/observations/observation-ebrpd-tilden-access-conditions-20260922.json",
      "reason": "Materialize official Tilden access, route, coordinate, or current-condition knowledge.",
      "record_id": "observation-ebrpd-tilden-access-conditions-20260922",
      "record_type": "observation",
      "summary": "Deepen Tilden access, route, geospatial, and current-condition knowledge."
    }
  ],
  "navigation": {
    "next_id": "observation-ebrpd-tilden-camping-20260922",
    "position": 167,
    "previous_id": "observation-ebrpd-thurgood-marshall-regional-park-home-port-chicago-50-visitor-profile",
    "total": 1318
  },
  "observations": [
    {
      "artifact_refs": [
        "Current notices",
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        "Park Accessibility",
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      ],
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      "observation_id": "observation-ebrpd-tilden-access-conditions-20260922",
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  ],
  "record": {
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    "observation_id": "observation-ebrpd-tilden-access-conditions-20260922",
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  "sources": [
    {
      "locator": "https://www.ebparks.org/parks/tilden",
      "publisher": "East Bay Regional Park District",
      "source_id": "source-ebrpd-tilden-park-page"
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}