{"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":"3304509","name":"Tusky"},"operator":{"type":"operator","id":"P09635","name":"Rosebud Mining Company"},"controller":{"type":"controller","id":"C07485","name":"J Clifford  Forrest III"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C07485","name":"J Clifford  Forrest III"},"object":{"type":"mine","id":"3304509","name":"Tusky"},"validFrom":"1979-08-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3304509|C07485|1979-08-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0050595","name":"Tusky Coal, LLC"},"object":{"type":"mine","id":"3304509","name":"Tusky"},"validFrom":"2002-08-20","validTo":"2005-06-22","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3304509|0050595|2002-08-20|2005-06-22"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C00707","name":"Holmes Limestone"},"object":{"type":"mine","id":"3304509","name":"Tusky"},"validFrom":"2002-08-20","validTo":"2003-12-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3304509|C00707|2002-08-20|2003-12-31"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C00707","name":"Holmes Limestone"},"object":{"type":"operator","id":"0050595","name":"Tusky Coal, LLC"},"validFrom":"2002-08-20","validTo":"2003-12-31","current":false,"derived":true,"evidenceMineId":"3304509","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3304509|0050595|2002-08-20|C00707|2002-08-20|49526"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C04381","name":"Charles C  Ungurean"},"object":{"type":"mine","id":"3304509","name":"Tusky"},"validFrom":"2004-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3304509|C04381|2004-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C04381","name":"Charles C  Ungurean"},"object":{"type":"operator","id":"0050595","name":"Tusky Coal, LLC"},"validFrom":"2004-01-01","validTo":"2005-06-22","current":false,"derived":true,"evidenceMineId":"3304509","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3304509|0050595|2002-08-20|C04381|2004-01-01|65817"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P09635","name":"Rosebud Mining Company"},"object":{"type":"mine","id":"3304509","name":"Tusky"},"validFrom":"2005-06-23","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3304509|P09635|2005-06-23|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C07485","name":"J Clifford  Forrest III"},"object":{"type":"operator","id":"P09635","name":"Rosebud Mining Company"},"validFrom":"2005-06-23","validTo":null,"current":true,"derived":true,"evidenceMineId":"3304509","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3304509|P09635|2005-06-23|C07485|1979-08-01|74739"}}],"coverage":{"historyRecords":3,"edgeCount":8,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3304509","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"}}