{"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":"0801353","name":"304th Street Quarry"},"operator":{"type":"operator","id":"L06522","name":"Dickerson Aggregates Inc"},"controller":{"type":"controller","id":"M00131","name":"Dickerson Group Inc"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00131","name":"Dickerson Group Inc"},"object":{"type":"mine","id":"0801353","name":"304th Street Quarry"},"validFrom":"1979-12-28","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0801353|M00131|1979-12-28|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L06522","name":"Dickerson Aggregates Inc"},"object":{"type":"mine","id":"0801353","name":"304th Street Quarry"},"validFrom":"2006-11-14","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0801353|L06522|2006-11-14|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00131","name":"Dickerson Group Inc"},"object":{"type":"operator","id":"L06522","name":"Dickerson Aggregates Inc"},"validFrom":"2006-11-14","validTo":null,"current":true,"derived":true,"evidenceMineId":"0801353","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0801353|L06522|2006-11-14|M00131|1979-12-28|104923"}}],"coverage":{"historyRecords":1,"edgeCount":3,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"0801353","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"}}