{"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":"0901000","name":"Broad River Quarries LLC"},"operator":{"type":"operator","id":"0051634","name":"Broad River Quarries LLC"},"controller":{"type":"controller","id":"0042211","name":"David W  Dye"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L39822","name":"Vaughn Granite Company"},"object":{"type":"mine","id":"0901000","name":"Broad River Quarries LLC"},"validFrom":"1987-04-01","validTo":"2003-07-27","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0901000|L39822|1987-04-01|2003-07-27"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M39822","name":"William Lee  Vaughn"},"object":{"type":"mine","id":"0901000","name":"Broad River Quarries LLC"},"validFrom":"1987-04-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0901000|M39822|1987-04-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M39822","name":"William Lee  Vaughn"},"object":{"type":"operator","id":"L39822","name":"Vaughn Granite Company"},"validFrom":"1987-04-01","validTo":"2003-07-27","current":false,"derived":true,"evidenceMineId":"0901000","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0901000|L39822|1987-04-01|M39822|1987-04-01|169423"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0051634","name":"Broad River Quarries LLC"},"object":{"type":"mine","id":"0901000","name":"Broad River Quarries LLC"},"validFrom":"2003-07-28","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0901000|0051634|2003-07-28|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0042211","name":"David W  Dye  et al"},"object":{"type":"mine","id":"0901000","name":"Broad River Quarries LLC"},"validFrom":"2003-07-28","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0901000|0042211|2003-07-28|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0042211","name":"David W  Dye  et al"},"object":{"type":"operator","id":"0051634","name":"Broad River Quarries LLC"},"validFrom":"2003-07-28","validTo":null,"current":true,"derived":true,"evidenceMineId":"0901000","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0901000|0051634|2003-07-28|0042211|2003-07-28|3756"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"0901000","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"}}