{"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":"3606150","name":"Murphy'S Bottom Land Plant"},"operator":{"type":"operator","id":"L18009","name":"Hanson Aggregates Pma Inc"},"controller":{"type":"controller","id":"M00004","name":"Heidelberg Materials AG"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00570","name":"Davison Sand & Gravel Company"},"object":{"type":"mine","id":"3606150","name":"Murphy'S Bottom Land Plant"},"validFrom":"1950-01-01","validTo":"1989-01-15","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3606150|L00570|1950-01-01|1989-01-15"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00483","name":"F R G Industries Inc"},"object":{"type":"mine","id":"3606150","name":"Murphy'S Bottom Land Plant"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3606150|M00483|1950-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00483","name":"F R G Industries Inc"},"object":{"type":"operator","id":"L00570","name":"Davison Sand & Gravel Company"},"validFrom":"1950-01-01","validTo":"1989-01-15","current":false,"derived":true,"evidenceMineId":"3606150","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3606150|L00570|1950-01-01|M00483|1950-01-01|111749"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L10742","name":"Davison Sand & Gravel Company"},"object":{"type":"mine","id":"3606150","name":"Murphy'S Bottom Land Plant"},"validFrom":"1989-01-16","validTo":"2001-02-28","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3606150|L10742|1989-01-16|2001-02-28"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M04321","name":"Pioneer International Ltd"},"object":{"type":"mine","id":"3606150","name":"Murphy'S Bottom Land Plant"},"validFrom":"1989-01-16","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3606150|M04321|1989-01-16|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M04321","name":"Pioneer International Ltd"},"object":{"type":"operator","id":"L10742","name":"Davison Sand & Gravel Company"},"validFrom":"1989-01-16","validTo":"2001-02-28","current":false,"derived":true,"evidenceMineId":"3606150","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3606150|L10742|1989-01-16|M04321|1989-01-16|131714"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00521","name":"Hanson PLC"},"object":{"type":"mine","id":"3606150","name":"Murphy'S Bottom Land Plant"},"validFrom":"2000-08-04","validTo":"2007-08-22","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3606150|M00521|2000-08-04|2007-08-22"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L18009","name":"Hanson Aggregates Pma Inc"},"object":{"type":"mine","id":"3606150","name":"Murphy'S Bottom Land Plant"},"validFrom":"2001-03-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3606150|L18009|2001-03-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00521","name":"Hanson PLC"},"object":{"type":"operator","id":"L18009","name":"Hanson Aggregates Pma Inc"},"validFrom":"2001-03-01","validTo":"2007-08-22","current":false,"derived":true,"evidenceMineId":"3606150","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3606150|L18009|2001-03-01|M00521|2000-08-04|112601"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00004","name":"Heidelberg Materials AG"},"object":{"type":"mine","id":"3606150","name":"Murphy'S Bottom Land Plant"},"validFrom":"2007-08-23","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3606150|M00004|2007-08-23|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00004","name":"Heidelberg Materials AG"},"object":{"type":"operator","id":"L18009","name":"Hanson Aggregates Pma Inc"},"validFrom":"2007-08-23","validTo":null,"current":true,"derived":true,"evidenceMineId":"3606150","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3606150|L18009|2001-03-01|M00004|2007-08-23|100967"}}],"coverage":{"historyRecords":4,"edgeCount":11,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3606150","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"}}