{"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":"2026-10-17T05:35:58.500035+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":"4404480","name":"No 1 Mine"},"operator":{"type":"operator","id":"P03650","name":"Dry Fork Coal Company Inc"},"controller":{"type":"controller","id":"C03012","name":"Looney Howard D"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C00006","name":"B Ray  Thompson"},"object":{"type":"mine","id":"4404480","name":"No 1 Mine"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4404480|C00006|1950-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P00021","name":"Oakwood Red Ash Coal Corp"},"object":{"type":"mine","id":"4404480","name":"No 1 Mine"},"validFrom":"1976-05-21","validTo":"1976-11-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4404480|P00021|1976-05-21|1976-11-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C00006","name":"B Ray  Thompson"},"object":{"type":"operator","id":"P00021","name":"Oakwood Red Ash Coal Corp"},"validFrom":"1976-05-21","validTo":"1976-11-30","current":false,"derived":true,"evidenceMineId":"4404480","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4404480|P00021|1976-05-21|C00006|1950-01-01|43166"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P03650","name":"Dry Fork Coal Company Inc"},"object":{"type":"mine","id":"4404480","name":"No 1 Mine"},"validFrom":"1976-12-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4404480|P03650|1976-12-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C03012","name":"Looney Howard D"},"object":{"type":"mine","id":"4404480","name":"No 1 Mine"},"validFrom":"1976-12-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4404480|C03012|1976-12-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C03012","name":"Looney Howard D"},"object":{"type":"operator","id":"P03650","name":"Dry Fork Coal Company Inc"},"validFrom":"1976-12-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"4404480","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4404480|P03650|1976-12-01|C03012|1976-12-01|61656"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4404480","dataSource":"postgres","snapshotId":"2026-10-17T05:35:58.500035+00:00","completedAt":"2026-10-17T06:17:15.228Z","sourceCount":20,"totalRows":15450873,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}