{
  "claims": [
    {
      "claim": {
        "claim_id": "claim-ebrpd-mussels-history-survey",
        "evidence_ids": [
          "evidence-ebrpd-mussels-history-survey"
        ],
        "predicate": "prior_waterbody_screening",
        "spatial_scope_ids": [
          "scope-ebrpd-inspected-lakes"
        ],
        "subject_id": "program-ebrpd-invasive-mussel",
        "temporal_scope": {
          "ends_on": "2026-09-20",
          "starts_on": "2026-09-20"
        },
        "value": {
          "list_is_growing": true,
          "lookback_days": 30,
          "published_flagged_waters": [
            "Contra Loma Reservoir",
            "Sacramento-San Joaquin Delta",
            "San Luis Reservoir",
            "Bethany Reservoir",
            "San Justo Reservoir",
            "Lake Mead",
            "Lake Havasu",
            "San Benito County waters",
            "California south of Tehachapi Mountains",
            "waters outside California"
          ]
        }
      },
      "evidence": [
        {
          "claim_id": "claim-ebrpd-mussels-history-survey",
          "evidence_id": "evidence-ebrpd-mussels-history-survey",
          "notes": "",
          "observation_id": "observation-ebrpd-mussels-history-survey",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [],
          "content": "Inspection includes a 30-day vessel-history survey and hands-on visual check. The survey flags use in an infested water body, including Contra Loma, the Delta, San Luis, Bethany, San Justo, Lakes Mead and Havasu, San Benito County, California south of the Tehachapis, and waters outside California; the page warns that this list is growing.",
          "observation_id": "observation-ebrpd-mussels-history-survey",
          "observed_at": "2026-09-20T00:00:00+00:00",
          "observer": "user-supplied page transcription",
          "retrieved_at": "2026-09-20T00:00:00+00:00",
          "source_id": "source-ebrpd-invasive-mussel-program"
        }
      ],
      "sources": [
        {
          "locator": "https://www.ebparks.org/recreation/boating/invasive-mussels",
          "publisher": "East Bay Regional Park District",
          "source_id": "source-ebrpd-invasive-mussel-program"
        }
      ]
    }
  ],
  "entities": [
    {
      "entity_id": "program-ebrpd-invasive-mussel",
      "kind": "inspection_program",
      "name": "EBRPD Invasive Mussel Program"
    }
  ],
  "history": [
    {
      "action": "ADD",
      "change_set_id": "wp-20260920-ebrpd-invasive-mussel-program",
      "evidence_refs": [],
      "knowledge_gap_refs": [],
      "path": "canonical/v0/observations/observation-ebrpd-mussels-history-survey.json",
      "reason": "Add EBRPD invasive-mussel inspection evidence and equipment-context rules.",
      "record_id": "observation-ebrpd-mussels-history-survey",
      "record_type": "observation",
      "summary": "Add the EBRPD invasive-mussel program as the equipment and prior-waterbody fixture, including inspection, failure, banding, fee, and wet-weather semantics."
    }
  ],
  "navigation": {
    "next_id": "observation-ebrpd-mussels-program-scope",
    "position": 117,
    "previous_id": "observation-ebrpd-mussels-failed-inspection",
    "total": 1318
  },
  "observations": [
    {
      "artifact_refs": [],
      "content": "Inspection includes a 30-day vessel-history survey and hands-on visual check. The survey flags use in an infested water body, including Contra Loma, the Delta, San Luis, Bethany, San Justo, Lakes Mead and Havasu, San Benito County, California south of the Tehachapis, and waters outside California; the page warns that this list is growing.",
      "observation_id": "observation-ebrpd-mussels-history-survey",
      "observed_at": "2026-09-20T00:00:00+00:00",
      "observer": "user-supplied page transcription",
      "retrieved_at": "2026-09-20T00:00:00+00:00",
      "source_id": "source-ebrpd-invasive-mussel-program"
    }
  ],
  "record": {
    "artifact_refs": [],
    "content": "Inspection includes a 30-day vessel-history survey and hands-on visual check. The survey flags use in an infested water body, including Contra Loma, the Delta, San Luis, Bethany, San Justo, Lakes Mead and Havasu, San Benito County, California south of the Tehachapis, and waters outside California; the page warns that this list is growing.",
    "observation_id": "observation-ebrpd-mussels-history-survey",
    "observed_at": "2026-09-20T00:00:00+00:00",
    "observer": "user-supplied page transcription",
    "retrieved_at": "2026-09-20T00:00:00+00:00",
    "source_id": "source-ebrpd-invasive-mussel-program"
  },
  "record_type": "observation",
  "related_records": [],
  "sources": [
    {
      "locator": "https://www.ebparks.org/recreation/boating/invasive-mussels",
      "publisher": "East Bay Regional Park District",
      "source_id": "source-ebrpd-invasive-mussel-program"
    }
  ]
}