{"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":"3605469","name":"Nardei Strip"},"operator":{"type":"operator","id":"P02115","name":"Utilco Inc"},"controller":{"type":"controller","id":"C01795","name":"Nardei Carl G"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01794","name":"Sager Coal Company"},"object":{"type":"mine","id":"3605469","name":"Nardei Strip"},"validFrom":"1950-01-01","validTo":"1975-03-24","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3605469|C01794|1950-01-01|1975-03-24"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P02114","name":"Sager Coal Company"},"object":{"type":"mine","id":"3605469","name":"Nardei Strip"},"validFrom":"1975-02-12","validTo":"1975-03-24","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3605469|P02114|1975-02-12|1975-03-24"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01794","name":"Sager Coal Company"},"object":{"type":"operator","id":"P02114","name":"Sager Coal Company"},"validFrom":"1975-02-12","validTo":"1975-03-24","current":false,"derived":true,"evidenceMineId":"3605469","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3605469|P02114|1975-02-12|C01794|1950-01-01|56138"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P02115","name":"Utilco Inc"},"object":{"type":"mine","id":"3605469","name":"Nardei Strip"},"validFrom":"1975-03-25","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3605469|P02115|1975-03-25|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01795","name":"Nardei Carl G"},"object":{"type":"mine","id":"3605469","name":"Nardei Strip"},"validFrom":"1975-03-25","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3605469|C01795|1975-03-25|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01795","name":"Nardei Carl G"},"object":{"type":"operator","id":"P02115","name":"Utilco Inc"},"validFrom":"1975-03-25","validTo":null,"current":true,"derived":true,"evidenceMineId":"3605469","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3605469|P02115|1975-03-25|C01795|1975-03-25|56139"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3605469","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"}}