{
  "claims": [
    {
      "claim": {
        "claim_id": "claim-alameda-creek-unpaved-weekday-closure-2026",
        "evidence_ids": [
          "evidence-alameda-creek-unpaved-weekday-closure-2026"
        ],
        "predicate": "trail_access_status",
        "spatial_scope_ids": [],
        "subject_id": "route-alameda-creek-unpaved-trail",
        "temporal_scope": {
          "ends_on": "2026-10-05",
          "starts_on": "2026-09-21"
        },
        "value": {
          "cause": "maintenance",
          "outside_work_hours": "open",
          "segment": "downstream of Union City/Ardenwood Boulevard",
          "stables_staging_parking": "open",
          "status": "closed_weekdays_08:00_to_17:00"
        }
      },
      "evidence": [
        {
          "claim_id": "claim-alameda-creek-unpaved-weekday-closure-2026",
          "evidence_id": "evidence-alameda-creek-unpaved-weekday-closure-2026",
          "notes": "Live EBRPD alert; recheck the official alerts page before travel.",
          "observation_id": "observation-ebrpd-alerts-closures-20260922",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [
            "Alerts and Closures table"
          ],
          "content": "The district alerts page published the park, trail, facility, and water conditions represented by the associated claims. Entries with insufficient page context were not promoted.",
          "observation_id": "observation-ebrpd-alerts-closures-20260922",
          "observed_at": null,
          "observer": "Wayproof live source review",
          "retrieved_at": "2026-09-22T18:30:00+00:00",
          "source_id": "source-ebrpd-alerts-closures"
        }
      ],
      "sources": [
        {
          "locator": "https://www.ebparks.org/alerts-closures",
          "publisher": "East Bay Regional Park District",
          "source_id": "source-ebrpd-alerts-closures"
        }
      ]
    }
  ],
  "entities": [
    {
      "entity_id": "route-alameda-creek-unpaved-trail",
      "kind": "route",
      "name": "Alameda Creek Unpaved Trail"
    }
  ],
  "history": [
    {
      "action": "ADD",
      "change_set_id": "wp-20260922-ebrpd-current-conditions",
      "evidence_refs": [],
      "knowledge_gap_refs": [],
      "path": "canonical/v0/claims/claim-alameda-creek-unpaved-weekday-closure-2026.json",
      "reason": "Materialize an unambiguous actionable condition from the district alerts page.",
      "record_id": "claim-alameda-creek-unpaved-weekday-closure-2026",
      "record_type": "claim",
      "summary": "Materialize current EBRPD closures and water disruptions for pre-trip rechecks."
    }
  ],
  "navigation": {
    "next_id": "claim-alder-creek-wawona-ordered-geometry-20260926",
    "position": 26,
    "previous_id": "claim-access-yosemite-valley-trailhead-parking-map-point",
    "total": 3965
  },
  "observations": [
    {
      "artifact_refs": [
        "Alerts and Closures table"
      ],
      "content": "The district alerts page published the park, trail, facility, and water conditions represented by the associated claims. Entries with insufficient page context were not promoted.",
      "observation_id": "observation-ebrpd-alerts-closures-20260922",
      "observed_at": null,
      "observer": "Wayproof live source review",
      "retrieved_at": "2026-09-22T18:30:00+00:00",
      "source_id": "source-ebrpd-alerts-closures"
    }
  ],
  "record": {
    "claim_id": "claim-alameda-creek-unpaved-weekday-closure-2026",
    "evidence_ids": [
      "evidence-alameda-creek-unpaved-weekday-closure-2026"
    ],
    "predicate": "trail_access_status",
    "spatial_scope_ids": [],
    "subject_id": "route-alameda-creek-unpaved-trail",
    "temporal_scope": {
      "ends_on": "2026-10-05",
      "starts_on": "2026-09-21"
    },
    "value": {
      "cause": "maintenance",
      "outside_work_hours": "open",
      "segment": "downstream of Union City/Ardenwood Boulevard",
      "stables_staging_parking": "open",
      "status": "closed_weekdays_08:00_to_17:00"
    }
  },
  "record_type": "claim",
  "related_records": [],
  "sources": [
    {
      "locator": "https://www.ebparks.org/alerts-closures",
      "publisher": "East Bay Regional Park District",
      "source_id": "source-ebrpd-alerts-closures"
    }
  ]
}