{"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":"3300055","name":"HIGHLAND STONE"},"operator":{"type":"operator","id":"L18253","name":"Hanson Aggregates Davon, LLC"},"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":"L01739","name":"Highland Stone"},"object":{"type":"mine","id":"3300055","name":"HIGHLAND STONE"},"validFrom":"1950-01-01","validTo":"2001-03-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3300055|L01739|1950-01-01|2001-03-30"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M01563","name":"Davon Inc"},"object":{"type":"mine","id":"3300055","name":"HIGHLAND STONE"},"validFrom":"1950-01-01","validTo":"2001-03-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3300055|M01563|1950-01-01|2001-03-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M01563","name":"Davon Inc"},"object":{"type":"operator","id":"L01739","name":"Highland Stone"},"validFrom":"1950-01-01","validTo":"2001-03-30","current":false,"derived":true,"evidenceMineId":"3300055","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3300055|L01739|1950-01-01|M01563|1950-01-01|119277"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L18253","name":"Hanson Aggregates Davon, LLC"},"object":{"type":"mine","id":"3300055","name":"HIGHLAND STONE"},"validFrom":"2001-03-31","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3300055|L18253|2001-03-31|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00521","name":"Hanson PLC"},"object":{"type":"mine","id":"3300055","name":"HIGHLAND STONE"},"validFrom":"2001-03-31","validTo":"2007-08-22","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3300055|M00521|2001-03-31|2007-08-22"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00521","name":"Hanson PLC"},"object":{"type":"operator","id":"L18253","name":"Hanson Aggregates Davon, LLC"},"validFrom":"2001-03-31","validTo":"2007-08-22","current":false,"derived":true,"evidenceMineId":"3300055","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3300055|L18253|2001-03-31|M00521|2001-03-31|112627"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00004","name":"Heidelberg Materials AG"},"object":{"type":"mine","id":"3300055","name":"HIGHLAND STONE"},"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":"3300055|M00004|2007-08-23|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00004","name":"Heidelberg Materials AG"},"object":{"type":"operator","id":"L18253","name":"Hanson Aggregates Davon, LLC"},"validFrom":"2007-08-23","validTo":null,"current":true,"derived":true,"evidenceMineId":"3300055","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3300055|L18253|2001-03-31|M00004|2007-08-23|100910"}}],"coverage":{"historyRecords":3,"edgeCount":8,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3300055","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"}}