{"data":{"schemaVersion":"realm.temporal-relationships.v1","temporalSemantics":{"validTime":{"granularity":"date","bounds":"inclusive","nullStart":"start date not published in the upstream history row","nullEnd":"open-ended in the upstream history row; not independent proof of present control"},"transactionTime":{"observedAt":"2026-10-13T11:19:05.459773+00:00","meaning":"time the checksum-addressed MDRS artifacts were observed by the PostgreSQL ingestion"},"derivation":{"controllerControlsOperator":"intersection of controller and operator valid-time intervals evidenced through this mine","currentIdentity":"current controller and operator are asserted only by the MDRS Mines snapshot"}},"current":{"mine":{"type":"mine","id":"2902162","name":"Crewshaw Pit"},"operator":{"type":"operator","id":"0056779","name":"Draw Resources"},"controller":{"type":"controller","id":"0047211","name":"Jack R  Ward"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L14701","name":"C & R Sand & Gravel"},"object":{"type":"mine","id":"2902162","name":"Crewshaw Pit"},"validFrom":"1996-07-01","validTo":"2004-11-18","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2902162|L14701|1996-07-01|2004-11-18"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M11189","name":"Crenshaw Robert D"},"object":{"type":"mine","id":"2902162","name":"Crewshaw Pit"},"validFrom":"1996-07-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2902162|M11189|1996-07-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M11189","name":"Crenshaw Robert D"},"object":{"type":"operator","id":"L14701","name":"C & R Sand & Gravel"},"validFrom":"1996-07-01","validTo":"2004-11-18","current":false,"derived":true,"evidenceMineId":"2902162","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2902162|L14701|1996-07-01|M11189|1996-07-01|150874"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0056779","name":"Draw Resources"},"object":{"type":"mine","id":"2902162","name":"Crewshaw Pit"},"validFrom":"2004-11-19","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2902162|0056779|2004-11-19|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0047211","name":"Jack R  Ward"},"object":{"type":"mine","id":"2902162","name":"Crewshaw Pit"},"validFrom":"2004-11-19","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2902162|0047211|2004-11-19|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0047211","name":"Jack R  Ward"},"object":{"type":"operator","id":"0056779","name":"Draw Resources"},"validFrom":"2004-11-19","validTo":null,"current":true,"derived":true,"evidenceMineId":"2902162","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2902162|0056779|2004-11-19|0047211|2004-11-19|5768"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"2902162","dataSource":"postgres","snapshotId":"2026-10-13T11:19:05.459773+00:00","completedAt":"2026-10-13T11:26:59.401Z","sourceCount":20,"totalRows":17906804,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}