{"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":"2026-10-17T05:35:58.500035+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":"4104248","name":"B&B SAND & GRAVEL #2"},"operator":{"type":"operator","id":"L15254","name":"B & B Sand & Gravel Inc"},"controller":{"type":"controller","id":"M11630","name":"Dorothy  Bartel; Rick  Bartel; Steve  Bartel"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M11630","name":"Dorothy  Bartel et al"},"object":{"type":"mine","id":"4104248","name":"B&B SAND & GRAVEL #2"},"validFrom":"1997-07-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4104248|M11630|1997-07-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L15254","name":"B & B Sand & Gravel Inc"},"object":{"type":"mine","id":"4104248","name":"B&B SAND & GRAVEL #2"},"validFrom":"2000-10-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4104248|L15254|2000-10-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M11630","name":"Dorothy  Bartel et al"},"object":{"type":"operator","id":"L15254","name":"B & B Sand & Gravel Inc"},"validFrom":"2000-10-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"4104248","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4104248|L15254|2000-10-01|M11630|1997-07-01|151970"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M11630","name":"Steve  Bartel et al"},"object":{"type":"operator","id":"L15254","name":"B & B Sand & Gravel Inc"},"validFrom":"2000-10-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"4104248","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4104248|L15254|2000-10-01|M11630|1997-07-01|151971"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M11630","name":"Rick  Bartel et al"},"object":{"type":"operator","id":"L15254","name":"B & B Sand & Gravel Inc"},"validFrom":"2000-10-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"4104248","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4104248|L15254|2000-10-01|M11630|1997-07-01|151972"}}],"coverage":{"historyRecords":3,"edgeCount":5,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4104248","dataSource":"postgres","snapshotId":"2026-10-17T05:35:58.500035+00:00","completedAt":"2026-10-17T06:17:15.228Z","sourceCount":20,"totalRows":15450873,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}