{"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":"3401838","name":"KERNS SAND PIT #2"},"operator":{"type":"operator","id":"L35183","name":"Kerns Construction Inc"},"controller":{"type":"controller","id":"0160381","name":"Jeff  Kerns etal; Robert  Kerns etal"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M35183","name":"Kerns Construction Inc"},"object":{"type":"mine","id":"3401838","name":"KERNS SAND PIT #2"},"validFrom":"1950-01-01","validTo":"2020-12-14","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3401838|M35183|1950-01-01|2020-12-14"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L35183","name":"Kerns Construction Inc"},"object":{"type":"mine","id":"3401838","name":"KERNS SAND PIT #2"},"validFrom":"2000-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3401838|L35183|2000-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M35183","name":"Kerns Construction Inc"},"object":{"type":"operator","id":"L35183","name":"Kerns Construction Inc"},"validFrom":"2000-01-01","validTo":"2020-12-14","current":false,"derived":true,"evidenceMineId":"3401838","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3401838|L35183|2000-01-01|M35183|1950-01-01|164060"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0160381","name":"Jeff  Kerns etal"},"object":{"type":"mine","id":"3401838","name":"KERNS SAND PIT #2"},"validFrom":"2020-12-15","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3401838|0160381|2020-12-15|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0160381","name":"Jeff  Kerns etal"},"object":{"type":"operator","id":"L35183","name":"Kerns Construction Inc"},"validFrom":"2020-12-15","validTo":null,"current":true,"derived":true,"evidenceMineId":"3401838","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3401838|L35183|2000-01-01|0160381|2020-12-15|33491"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0160381","name":"Robert  Kerns etal"},"object":{"type":"operator","id":"L35183","name":"Kerns Construction Inc"},"validFrom":"2020-12-15","validTo":null,"current":true,"derived":true,"evidenceMineId":"3401838","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3401838|L35183|2000-01-01|0160381|2020-12-15|33492"}}],"coverage":{"historyRecords":3,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3401838","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"}}