{"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":"1516078","name":"No 1 Mine"},"operator":{"type":"operator","id":"P19306","name":"Wolf Creek Coal Company"},"controller":{"type":"controller","id":"C13284","name":"Crawford Jeff--Samuel W Rose Jr"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C12074","name":"Christian Michael Et Al"},"object":{"type":"mine","id":"1516078","name":"No 1 Mine"},"validFrom":"1985-08-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1516078|C12074|1985-08-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P17106","name":"M & F Coal Company"},"object":{"type":"mine","id":"1516078","name":"No 1 Mine"},"validFrom":"1987-06-01","validTo":"1987-12-13","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1516078|P17106|1987-06-01|1987-12-13"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C12074","name":"Christian Michael Et Al"},"object":{"type":"operator","id":"P17106","name":"M & F Coal Company"},"validFrom":"1987-06-01","validTo":"1987-12-13","current":false,"derived":true,"evidenceMineId":"1516078","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1516078|P17106|1987-06-01|C12074|1985-08-01|86087"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P19306","name":"Wolf Creek Coal Company"},"object":{"type":"mine","id":"1516078","name":"No 1 Mine"},"validFrom":"1987-12-14","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1516078|P19306|1987-12-14|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C13284","name":"Crawford Jeff--Samuel W Rose Jr Et Al"},"object":{"type":"mine","id":"1516078","name":"No 1 Mine"},"validFrom":"1987-12-14","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1516078|C13284|1987-12-14|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C13284","name":"Crawford Jeff--Samuel W Rose Jr Et Al"},"object":{"type":"operator","id":"P19306","name":"Wolf Creek Coal Company"},"validFrom":"1987-12-14","validTo":null,"current":true,"derived":true,"evidenceMineId":"1516078","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1516078|P19306|1987-12-14|C13284|1987-12-14|89152"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1516078","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"}}