{"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":"4201429","name":"White Mesa Mill"},"operator":{"type":"operator","id":"0200613","name":"EFR White Mesa LLC"},"controller":{"type":"controller","id":"0175160","name":"Energy Fuels Inc"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L02246","name":"Energy Fuels Nuclear Inc"},"object":{"type":"mine","id":"4201429","name":"White Mesa Mill"},"validFrom":"1950-01-01","validTo":"1984-01-08","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4201429|L02246|1950-01-01|1984-01-08"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M01977","name":"Harold  Roberts"},"object":{"type":"mine","id":"4201429","name":"White Mesa Mill"},"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":"4201429|M01977|1950-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M01977","name":"Harold  Roberts"},"object":{"type":"operator","id":"L02246","name":"Energy Fuels Nuclear Inc"},"validFrom":"1950-01-01","validTo":"1984-01-08","current":false,"derived":true,"evidenceMineId":"4201429","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4201429|L02246|1950-01-01|M01977|1950-01-01|122489"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L06987","name":"Umetco Minerals Corp"},"object":{"type":"mine","id":"4201429","name":"White Mesa Mill"},"validFrom":"1984-01-09","validTo":"1994-05-25","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4201429|L06987|1984-01-09|1994-05-25"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M05570","name":"Umetco Minerals Corp et al"},"object":{"type":"mine","id":"4201429","name":"White Mesa Mill"},"validFrom":"1984-01-09","validTo":"1994-05-25","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4201429|M05570|1984-01-09|1994-05-25"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M05570","name":"Umetco Minerals Corp et al"},"object":{"type":"operator","id":"L06987","name":"Umetco Minerals Corp"},"validFrom":"1984-01-09","validTo":"1994-05-25","current":false,"derived":true,"evidenceMineId":"4201429","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4201429|L06987|1984-01-09|M05570|1984-01-09|134895"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L02246","name":"Energy Fuels Nuclear Inc"},"object":{"type":"mine","id":"4201429","name":"White Mesa Mill"},"validFrom":"1994-05-26","validTo":"1997-05-09","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4201429|L02246|1994-05-26|1997-05-09"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M01977","name":"Harold  Roberts"},"object":{"type":"operator","id":"L02246","name":"Energy Fuels Nuclear Inc"},"validFrom":"1994-05-26","validTo":"1997-05-09","current":false,"derived":true,"evidenceMineId":"4201429","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4201429|L02246|1994-05-26|M01977|1950-01-01|122490"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L15509","name":"Energy Fuels Resources (USA) Inc."},"object":{"type":"mine","id":"4201429","name":"White Mesa Mill"},"validFrom":"1997-05-10","validTo":"2025-02-09","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4201429|L15509|1997-05-10|2025-02-09"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M11844","name":"International Uranium Corp"},"object":{"type":"mine","id":"4201429","name":"White Mesa Mill"},"validFrom":"1997-05-10","validTo":"2023-02-12","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4201429|M11844|1997-05-10|2023-02-12"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M11844","name":"International Uranium Corp"},"object":{"type":"operator","id":"L15509","name":"Energy Fuels Resources (USA) Inc."},"validFrom":"1997-05-10","validTo":"2023-02-12","current":false,"derived":true,"evidenceMineId":"4201429","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4201429|L15509|1997-05-10|M11844|1997-05-10|152542"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0175160","name":"Energy Fuels Inc"},"object":{"type":"mine","id":"4201429","name":"White Mesa Mill"},"validFrom":"2023-02-13","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4201429|0175160|2023-02-13|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0175160","name":"Energy Fuels Inc"},"object":{"type":"operator","id":"L15509","name":"Energy Fuels Resources (USA) Inc."},"validFrom":"2023-02-13","validTo":"2025-02-09","current":false,"derived":true,"evidenceMineId":"4201429","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4201429|L15509|1997-05-10|0175160|2023-02-13|37366"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0200613","name":"EFR White Mesa LLC"},"object":{"type":"mine","id":"4201429","name":"White Mesa Mill"},"validFrom":"2025-02-10","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4201429|0200613|2025-02-10|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0175160","name":"Energy Fuels Inc"},"object":{"type":"mine","id":"4201429","name":"White Mesa Mill"},"validFrom":"2025-02-10","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4201429|0175160|2025-02-10|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0175160","name":"Energy Fuels Inc"},"object":{"type":"operator","id":"0200613","name":"EFR White Mesa LLC"},"validFrom":"2025-02-10","validTo":null,"current":true,"derived":true,"evidenceMineId":"4201429","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4201429|0200613|2025-02-10|0175160|2025-02-10|37378"}}],"coverage":{"historyRecords":6,"edgeCount":16,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4201429","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"}}