{
  "claims": [
    {
      "claim": {
        "claim_id": "claim-hetch-hetchy-access-profile",
        "evidence_ids": [
          "evidence-hetch-hetchy-access-profile"
        ],
        "predicate": "access_profile",
        "spatial_scope_ids": [
          "scope-hetch-hetchy"
        ],
        "subject_id": "place-hetch-hetchy",
        "temporal_scope": null,
        "value": {
          "day_visitors_exit_by": "sunset",
          "drive_time": "about 1 hour 15 minutes",
          "from_yosemite_valley_miles": 38,
          "operational_status_requires_current_check": true,
          "parking": "delays possible when dam-area lot fills, typically midday weekends",
          "road_closed_to_all_vehicles": "sunset to sunrise",
          "road_hours": "sunrise to sunset",
          "winter": "November through March closures or chain requirements possible"
        }
      },
      "evidence": [
        {
          "claim_id": "claim-hetch-hetchy-access-profile",
          "evidence_id": "evidence-hetch-hetchy-access-profile",
          "notes": "",
          "observation_id": "observation-nps-yosemite-hetch-hetchy-20260925",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [],
          "content": "NPS publishes Hetch Hetchy travel time, daylight-only road access, parking-delay context, winter road constraints, and reservoir use restrictions.",
          "observation_id": "observation-nps-yosemite-hetch-hetchy-20260925",
          "observed_at": null,
          "observer": "",
          "retrieved_at": "2026-09-25T00:00:00+00:00",
          "source_id": "source-nps-yosemite-hetch-hetchy"
        }
      ],
      "sources": [
        {
          "locator": "https://www.nps.gov/yose/planyourvisit/hh.htm",
          "publisher": "National Park Service",
          "source_id": "source-nps-yosemite-hetch-hetchy"
        }
      ]
    }
  ],
  "entities": [
    {
      "entity_id": "place-hetch-hetchy",
      "kind": "place",
      "name": "Hetch Hetchy Valley"
    }
  ],
  "history": [
    {
      "action": "ADD",
      "change_set_id": "wp-20260925-yosemite-hetch-hetchy-depth",
      "evidence_refs": [],
      "knowledge_gap_refs": [],
      "path": "canonical/v0/observations/observation-nps-yosemite-hetch-hetchy-20260925.json",
      "reason": "Add reviewed Hetch Hetchy planning depth.",
      "record_id": "observation-nps-yosemite-hetch-hetchy-20260925",
      "record_type": "observation",
      "summary": "Add official-source Hetch Hetchy routes, access, reservoir rules, facilities, dated operational evidence, reviewed map points, and explicit gaps."
    }
  ],
  "navigation": {
    "next_id": "observation-nps-yosemite-hetch-hetchy-backcountry-20260925",
    "position": 904,
    "previous_id": "observation-nps-yosemite-half-dome-day-hike-20260925",
    "total": 1318
  },
  "observations": [
    {
      "artifact_refs": [],
      "content": "NPS publishes Hetch Hetchy travel time, daylight-only road access, parking-delay context, winter road constraints, and reservoir use restrictions.",
      "observation_id": "observation-nps-yosemite-hetch-hetchy-20260925",
      "observed_at": null,
      "observer": "",
      "retrieved_at": "2026-09-25T00:00:00+00:00",
      "source_id": "source-nps-yosemite-hetch-hetchy"
    }
  ],
  "record": {
    "artifact_refs": [],
    "content": "NPS publishes Hetch Hetchy travel time, daylight-only road access, parking-delay context, winter road constraints, and reservoir use restrictions.",
    "observation_id": "observation-nps-yosemite-hetch-hetchy-20260925",
    "observed_at": null,
    "observer": "",
    "retrieved_at": "2026-09-25T00:00:00+00:00",
    "source_id": "source-nps-yosemite-hetch-hetchy"
  },
  "record_type": "observation",
  "related_records": [],
  "sources": [
    {
      "locator": "https://www.nps.gov/yose/planyourvisit/hh.htm",
      "publisher": "National Park Service",
      "source_id": "source-nps-yosemite-hetch-hetchy"
    }
  ]
}