{"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":"4001829","name":"No 1"},"operator":{"type":"operator","id":"P00424","name":"Hawkeye Elkhorn Coal Company Inc"},"controller":{"type":"controller","id":"C00334","name":"Schwab Charles F"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C00334","name":"Schwab Charles F"},"object":{"type":"mine","id":"4001829","name":"No 1"},"validFrom":"1975-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4001829|C00334|1975-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P00424","name":"Hawkeye Elkhorn Coal Company Inc"},"object":{"type":"mine","id":"4001829","name":"No 1"},"validFrom":"1975-09-01","validTo":"1976-09-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4001829|P00424|1975-09-01|1976-09-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C00334","name":"Schwab Charles F"},"object":{"type":"operator","id":"P00424","name":"Hawkeye Elkhorn Coal Company Inc"},"validFrom":"1975-09-01","validTo":"1976-09-30","current":false,"derived":true,"evidenceMineId":"4001829","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4001829|P00424|1975-09-01|C00334|1975-01-01|46209"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P06774","name":"Rocky Top Coal Company"},"object":{"type":"mine","id":"4001829","name":"No 1"},"validFrom":"1976-10-01","validTo":"1979-05-14","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4001829|P06774|1976-10-01|1979-05-14"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C08962","name":"Orange James E"},"object":{"type":"mine","id":"4001829","name":"No 1"},"validFrom":"1976-10-01","validTo":"1979-05-14","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4001829|C08962|1976-10-01|1979-05-14"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C08962","name":"Orange James E"},"object":{"type":"operator","id":"P06774","name":"Rocky Top Coal Company"},"validFrom":"1976-10-01","validTo":"1979-05-14","current":false,"derived":true,"evidenceMineId":"4001829","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4001829|P06774|1976-10-01|C08962|1976-10-01|78526"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P00424","name":"Hawkeye Elkhorn Coal Company Inc"},"object":{"type":"mine","id":"4001829","name":"No 1"},"validFrom":"1979-05-15","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4001829|P00424|1979-05-15|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C00334","name":"Schwab Charles F"},"object":{"type":"operator","id":"P00424","name":"Hawkeye Elkhorn Coal Company Inc"},"validFrom":"1979-05-15","validTo":null,"current":true,"derived":true,"evidenceMineId":"4001829","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4001829|P00424|1979-05-15|C00334|1975-01-01|46210"}}],"coverage":{"historyRecords":3,"edgeCount":8,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4001829","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"}}