{"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":"1511952","name":"No 1 Surface"},"operator":{"type":"operator","id":"P10655","name":"Mount Vernon Mining Inc"},"controller":{"type":"controller","id":"C08092","name":"Rogers Lynn G"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P09479","name":"Kestner Coal Company"},"object":{"type":"mine","id":"1511952","name":"No 1 Surface"},"validFrom":"1979-07-01","validTo":"1980-06-05","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1511952|P09479|1979-07-01|1980-06-05"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C07444","name":"Kestner Graham & Leroy Malicote"},"object":{"type":"mine","id":"1511952","name":"No 1 Surface"},"validFrom":"1979-07-01","validTo":"1980-06-05","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1511952|C07444|1979-07-01|1980-06-05"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C07444","name":"Kestner Graham & Leroy Malicote"},"object":{"type":"operator","id":"P09479","name":"Kestner Coal Company"},"validFrom":"1979-07-01","validTo":"1980-06-05","current":false,"derived":true,"evidenceMineId":"1511952","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1511952|P09479|1979-07-01|C07444|1979-07-01|74601"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P10655","name":"Mount Vernon Mining Inc"},"object":{"type":"mine","id":"1511952","name":"No 1 Surface"},"validFrom":"1980-06-06","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1511952|P10655|1980-06-06|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C08092","name":"Rogers Lynn G"},"object":{"type":"mine","id":"1511952","name":"No 1 Surface"},"validFrom":"1980-06-06","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1511952|C08092|1980-06-06|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C08092","name":"Rogers Lynn G"},"object":{"type":"operator","id":"P10655","name":"Mount Vernon Mining Inc"},"validFrom":"1980-06-06","validTo":null,"current":true,"derived":true,"evidenceMineId":"1511952","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1511952|P10655|1980-06-06|C08092|1980-06-06|76347"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1511952","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"}}