{"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":"3900441","name":"Brandon Materials Company"},"operator":{"type":"operator","id":"L15667","name":"Brandon Materials Company"},"controller":{"type":"controller","id":"M11946","name":"Gerald P  Sweetman"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L09303","name":"Brandon Ready Mix Inc"},"object":{"type":"mine","id":"3900441","name":"Brandon Materials Company"},"validFrom":"1950-01-01","validTo":"1986-06-15","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3900441|L09303|1950-01-01|1986-06-15"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M07322","name":"Clifton E  Cronkite"},"object":{"type":"mine","id":"3900441","name":"Brandon Materials Company"},"validFrom":"1950-01-01","validTo":"1986-06-15","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3900441|M07322|1950-01-01|1986-06-15"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M07322","name":"Clifton E  Cronkite"},"object":{"type":"operator","id":"L09303","name":"Brandon Ready Mix Inc"},"validFrom":"1950-01-01","validTo":"1986-06-15","current":false,"derived":true,"evidenceMineId":"3900441","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3900441|L09303|1950-01-01|M07322|1950-01-01|140648"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L09372","name":"Brandon Tea Ready Mix"},"object":{"type":"mine","id":"3900441","name":"Brandon Materials Company"},"validFrom":"1986-06-16","validTo":"1992-05-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3900441|L09372|1986-06-16|1992-05-31"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00145","name":"Richard C  Lundin  et al"},"object":{"type":"mine","id":"3900441","name":"Brandon Materials Company"},"validFrom":"1986-06-16","validTo":"1992-05-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3900441|M00145|1986-06-16|1992-05-31"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00145","name":"Richard C  Lundin  et al"},"object":{"type":"operator","id":"L09372","name":"Brandon Tea Ready Mix"},"validFrom":"1986-06-16","validTo":"1992-05-31","current":false,"derived":true,"evidenceMineId":"3900441","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3900441|L09372|1986-06-16|M00145|1986-06-16|105074"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L15667","name":"Brandon Materials Company"},"object":{"type":"mine","id":"3900441","name":"Brandon Materials Company"},"validFrom":"1992-06-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3900441|L15667|1992-06-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M11946","name":"Gerald P  Sweetman"},"object":{"type":"mine","id":"3900441","name":"Brandon Materials Company"},"validFrom":"1992-06-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3900441|M11946|1992-06-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M11946","name":"Gerald P  Sweetman"},"object":{"type":"operator","id":"L15667","name":"Brandon Materials Company"},"validFrom":"1992-06-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"3900441","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3900441|L15667|1992-06-01|M11946|1992-06-01|152753"}}],"coverage":{"historyRecords":3,"edgeCount":9,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3900441","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"}}