{"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":"1508148","name":"Rainey No 1 Surface Mine"},"operator":{"type":"operator","id":"P00737","name":"Island Creek Coal Company"},"controller":{"type":"controller","id":"C00613","name":"Occidental Petroleum Corp"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C00613","name":"Occidental Petroleum Corp"},"object":{"type":"mine","id":"1508148","name":"Rainey No 1 Surface Mine"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1508148|C00613|1950-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P00722","name":"Wales Corp"},"object":{"type":"mine","id":"1508148","name":"Rainey No 1 Surface Mine"},"validFrom":"1975-03-01","validTo":"1976-03-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1508148|P00722|1975-03-01|1976-03-31"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C00616","name":"Walsh David E & Richard"},"object":{"type":"mine","id":"1508148","name":"Rainey No 1 Surface Mine"},"validFrom":"1975-03-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1508148|C00616|1975-03-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C00616","name":"Walsh David E & Richard"},"object":{"type":"operator","id":"P00722","name":"Wales Corp"},"validFrom":"1975-03-01","validTo":"1976-03-31","current":false,"derived":true,"evidenceMineId":"1508148","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1508148|P00722|1975-03-01|C00616|1975-03-01|48618"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P00737","name":"Island Creek Coal Company"},"object":{"type":"mine","id":"1508148","name":"Rainey No 1 Surface Mine"},"validFrom":"1976-04-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1508148|P00737|1976-04-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C00613","name":"Occidental Petroleum Corp"},"object":{"type":"operator","id":"P00737","name":"Island Creek Coal Company"},"validFrom":"1976-04-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"1508148","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1508148|P00737|1976-04-01|C00613|1950-01-01|48456"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1508148","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"}}