{"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":"1701140","name":"Rock Ridge Quarry"},"operator":{"type":"operator","id":"L30056","name":"A.H. Grover, Inc."},"controller":{"type":"controller","id":"0190341","name":"Benjamin C Grover"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M30056","name":"Alwin H  Grover"},"object":{"type":"mine","id":"1701140","name":"Rock Ridge Quarry"},"validFrom":"1988-03-01","validTo":"2024-10-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1701140|M30056|1988-03-01|2024-10-31"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L30056","name":"A.H. Grover, Inc."},"object":{"type":"mine","id":"1701140","name":"Rock Ridge Quarry"},"validFrom":"2024-10-30","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1701140|L30056|2024-10-30|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M30056","name":"Alwin H  Grover"},"object":{"type":"operator","id":"L30056","name":"A.H. Grover, Inc."},"validFrom":"2024-10-30","validTo":"2024-10-31","current":false,"derived":true,"evidenceMineId":"1701140","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1701140|L30056|2024-10-30|M30056|1988-03-01|158145"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0190341","name":"Benjamin C Grover"},"object":{"type":"mine","id":"1701140","name":"Rock Ridge Quarry"},"validFrom":"2024-11-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1701140|0190341|2024-11-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0190341","name":"Benjamin C Grover"},"object":{"type":"operator","id":"L30056","name":"A.H. Grover, Inc."},"validFrom":"2024-11-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"1701140","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1701140|L30056|2024-10-30|0190341|2024-11-01|40612"}}],"coverage":{"historyRecords":2,"edgeCount":5,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1701140","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"}}