{"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":"2026-10-18T09:31:49.615908+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":"3901217","name":"Tjarden Sand & Gravel & Plant"},"operator":{"type":"operator","id":"L04122","name":"Tjarden Sand & Gravel"},"controller":{"type":"controller","id":"M03310","name":"Interstate Dairy Sales"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-18T09:31:49.615908+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L04121","name":"Salem Lumber Company"},"object":{"type":"mine","id":"3901217","name":"Tjarden Sand & Gravel & Plant"},"validFrom":"1979-07-01","validTo":"1980-05-08","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"3901217|L04121|1979-07-01|1980-05-08"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M03309","name":"Fligge Doug"},"object":{"type":"mine","id":"3901217","name":"Tjarden Sand & Gravel & Plant"},"validFrom":"1979-07-01","validTo":"1980-05-08","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"3901217|M03309|1979-07-01|1980-05-08"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M03309","name":"Fligge Doug"},"object":{"type":"operator","id":"L04121","name":"Salem Lumber Company"},"validFrom":"1979-07-01","validTo":"1980-05-08","current":false,"derived":true,"evidenceMineId":"3901217","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"3901217|L04121|1979-07-01|M03309|1979-07-01|128752"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L04122","name":"Tjarden Sand & Gravel"},"object":{"type":"mine","id":"3901217","name":"Tjarden Sand & Gravel & Plant"},"validFrom":"1980-05-09","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"3901217|L04122|1980-05-09|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M03310","name":"Interstate Dairy Sales"},"object":{"type":"mine","id":"3901217","name":"Tjarden Sand & Gravel & Plant"},"validFrom":"1980-05-09","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"3901217|M03310|1980-05-09|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M03310","name":"Interstate Dairy Sales"},"object":{"type":"operator","id":"L04122","name":"Tjarden Sand & Gravel"},"validFrom":"1980-05-09","validTo":null,"current":true,"derived":true,"evidenceMineId":"3901217","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"3901217|L04122|1980-05-09|M03310|1980-05-09|128753"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3901217","dataSource":"postgres","snapshotId":"2026-10-18T09:31:49.615908+00:00","completedAt":"2026-10-18T09:31:49.615Z","sourceCount":20,"totalRows":17915666,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}