{"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":"4406096","name":"National #3 Surface Mine"},"operator":{"type":"operator","id":"P00396","name":"Wellmore Coal Corp"},"controller":{"type":"controller","id":"C00375","name":"United  Company"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C00375","name":"United  Company"},"object":{"type":"mine","id":"4406096","name":"National #3 Surface Mine"},"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":"4406096|C00375|1950-01-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C00376","name":"E H  Lester"},"object":{"type":"mine","id":"4406096","name":"National #3 Surface Mine"},"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":"4406096|C00376|1950-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P02302","name":"Knox Creek Coal Corp"},"object":{"type":"mine","id":"4406096","name":"National #3 Surface Mine"},"validFrom":"1984-06-01","validTo":"1985-09-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4406096|P02302|1984-06-01|1985-09-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C00376","name":"E H  Lester"},"object":{"type":"operator","id":"P02302","name":"Knox Creek Coal Corp"},"validFrom":"1984-06-01","validTo":"1985-09-30","current":false,"derived":true,"evidenceMineId":"4406096","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4406096|P02302|1984-06-01|C00376|1950-01-01|46826"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P17166","name":"Knox Creek Coal Corp"},"object":{"type":"mine","id":"4406096","name":"National #3 Surface Mine"},"validFrom":"1985-10-01","validTo":"1987-05-19","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4406096|P17166|1985-10-01|1987-05-19"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C06148","name":"Cyprus Amax Minerals Company"},"object":{"type":"mine","id":"4406096","name":"National #3 Surface Mine"},"validFrom":"1985-10-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4406096|C06148|1985-10-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C06148","name":"Cyprus Amax Minerals Company"},"object":{"type":"operator","id":"P17166","name":"Knox Creek Coal Corp"},"validFrom":"1985-10-01","validTo":"1987-05-19","current":false,"derived":true,"evidenceMineId":"4406096","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4406096|P17166|1985-10-01|C06148|1985-10-01|70982"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P00396","name":"Wellmore Coal Corp"},"object":{"type":"mine","id":"4406096","name":"National #3 Surface Mine"},"validFrom":"1987-05-20","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4406096|P00396|1987-05-20|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C00375","name":"United  Company"},"object":{"type":"operator","id":"P00396","name":"Wellmore Coal Corp"},"validFrom":"1987-05-20","validTo":null,"current":true,"derived":true,"evidenceMineId":"4406096","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4406096|P00396|1987-05-20|C00375|1950-01-01|46562"}}],"coverage":{"historyRecords":3,"edgeCount":9,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4406096","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"}}