{"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":"1510449","name":"1a"},"operator":{"type":"operator","id":"P23025","name":"Big Hill Mining Inc"},"controller":{"type":"controller","id":"C00349","name":"Curtis  Francis"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P06330","name":"Ora Mae Coal Company Inc"},"object":{"type":"mine","id":"1510449","name":"1a"},"validFrom":"1977-06-01","validTo":"1987-01-20","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1510449|P06330|1977-06-01|1987-01-20"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C02508","name":"Massey Energy Company"},"object":{"type":"mine","id":"1510449","name":"1a"},"validFrom":"1977-06-01","validTo":"1987-01-20","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1510449|C02508|1977-06-01|1987-01-20"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C02508","name":"Massey Energy Company"},"object":{"type":"operator","id":"P06330","name":"Ora Mae Coal Company Inc"},"validFrom":"1977-06-01","validTo":"1987-01-20","current":false,"derived":true,"evidenceMineId":"1510449","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1510449|P06330|1977-06-01|C02508|1977-06-01|59122"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C00349","name":"Curtis  Francis"},"object":{"type":"mine","id":"1510449","name":"1a"},"validFrom":"1982-03-31","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1510449|C00349|1982-03-31|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P18411","name":"A & A Francis Energy Inc"},"object":{"type":"mine","id":"1510449","name":"1a"},"validFrom":"1987-01-21","validTo":"1990-04-11","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1510449|P18411|1987-01-21|1990-04-11"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C12833","name":"Dean  Francis"},"object":{"type":"mine","id":"1510449","name":"1a"},"validFrom":"1987-01-21","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1510449|C12833|1987-01-21|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C12833","name":"Dean  Francis"},"object":{"type":"operator","id":"P18411","name":"A & A Francis Energy Inc"},"validFrom":"1987-01-21","validTo":"1990-04-11","current":false,"derived":true,"evidenceMineId":"1510449","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1510449|P18411|1987-01-21|C12833|1987-01-21|87983"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P23025","name":"Big Hill Mining Inc"},"object":{"type":"mine","id":"1510449","name":"1a"},"validFrom":"1990-04-12","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1510449|P23025|1990-04-12|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C00349","name":"Curtis  Francis"},"object":{"type":"operator","id":"P23025","name":"Big Hill Mining Inc"},"validFrom":"1990-04-12","validTo":null,"current":true,"derived":true,"evidenceMineId":"1510449","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1510449|P23025|1990-04-12|C00349|1982-03-31|46316"}}],"coverage":{"historyRecords":3,"edgeCount":9,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1510449","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"}}