{"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":"4608173","name":"Fayette Mines"},"operator":{"type":"operator","id":"P22881","name":"Ansted Coal Company"},"controller":{"type":"controller","id":"C14955","name":"RTZ-CRA Group"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P21905","name":"Ansted Coal Company"},"object":{"type":"mine","id":"4608173","name":"Fayette Mines"},"validFrom":"1992-04-01","validTo":"1993-06-01","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4608173|P21905|1992-04-01|1993-06-01"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C02046","name":"MidAmerican Energy Holdings Company"},"object":{"type":"mine","id":"4608173","name":"Fayette Mines"},"validFrom":"1992-04-01","validTo":"1993-06-01","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4608173|C02046|1992-04-01|1993-06-01"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C02046","name":"MidAmerican Energy Holdings Company"},"object":{"type":"operator","id":"P21905","name":"Ansted Coal Company"},"validFrom":"1992-04-01","validTo":"1993-06-01","current":false,"derived":true,"evidenceMineId":"4608173","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4608173|P21905|1992-04-01|C02046|1992-04-01|57328"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P22881","name":"Ansted Coal Company"},"object":{"type":"mine","id":"4608173","name":"Fayette Mines"},"validFrom":"1993-06-02","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4608173|P22881|1993-06-02|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C14955","name":"RTZ-CRA Group"},"object":{"type":"mine","id":"4608173","name":"Fayette Mines"},"validFrom":"1993-06-02","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4608173|C14955|1993-06-02|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C14955","name":"RTZ-CRA Group"},"object":{"type":"operator","id":"P22881","name":"Ansted Coal Company"},"validFrom":"1993-06-02","validTo":null,"current":true,"derived":true,"evidenceMineId":"4608173","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4608173|P22881|1993-06-02|C14955|1993-06-02|94347"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4608173","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"}}