{"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":"2601624","name":"Alligator Ridge Mine"},"operator":{"type":"operator","id":"L11052","name":"Placer Dome U S Inc"},"controller":{"type":"controller","id":"M02397","name":"Placer Dome Ltd"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M02397","name":"Placer Dome Ltd"},"object":{"type":"mine","id":"2601624","name":"Alligator Ridge 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":"2601624|M02397|1950-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L08199","name":"Bp Gold Company"},"object":{"type":"mine","id":"2601624","name":"Alligator Ridge Mine"},"validFrom":"1980-03-01","validTo":"1989-06-29","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2601624|L08199|1980-03-01|1989-06-29"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M06524","name":"Bp Minerals America & Nerco Minerals Co"},"object":{"type":"mine","id":"2601624","name":"Alligator Ridge Mine"},"validFrom":"1980-03-01","validTo":"1989-06-29","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2601624|M06524|1980-03-01|1989-06-29"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M06524","name":"Bp Minerals America & Nerco Minerals Co"},"object":{"type":"operator","id":"L08199","name":"Bp Gold Company"},"validFrom":"1980-03-01","validTo":"1989-06-29","current":false,"derived":true,"evidenceMineId":"2601624","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2601624|L08199|1980-03-01|M06524|1980-03-01|138708"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M08997","name":"Pegasus Gold Inc Et Al"},"object":{"type":"mine","id":"2601624","name":"Alligator Ridge Mine"},"validFrom":"1988-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2601624|M08997|1988-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L10968","name":"Kennecott Alligator Ridge Company"},"object":{"type":"mine","id":"2601624","name":"Alligator Ridge Mine"},"validFrom":"1989-06-30","validTo":"1990-05-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2601624|L10968|1989-06-30|1990-05-30"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M01812","name":"Rio Tinto Group"},"object":{"type":"mine","id":"2601624","name":"Alligator Ridge Mine"},"validFrom":"1989-06-30","validTo":"1990-05-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2601624|M01812|1989-06-30|1990-05-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M01812","name":"Rio Tinto Group"},"object":{"type":"operator","id":"L10968","name":"Kennecott Alligator Ridge Company"},"validFrom":"1989-06-30","validTo":"1990-05-30","current":false,"derived":true,"evidenceMineId":"2601624","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2601624|L10968|1989-06-30|M01812|1989-06-30|121369"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L11642","name":"Usmx Inc"},"object":{"type":"mine","id":"2601624","name":"Alligator Ridge Mine"},"validFrom":"1990-05-31","validTo":"1993-12-06","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2601624|L11642|1990-05-31|1993-12-06"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M08997","name":"Pegasus Gold Inc Et Al"},"object":{"type":"operator","id":"L11642","name":"Usmx Inc"},"validFrom":"1990-05-31","validTo":"1993-12-06","current":false,"derived":true,"evidenceMineId":"2601624","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2601624|L11642|1990-05-31|M08997|1988-01-01|144851"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L11052","name":"Placer Dome U S Inc"},"object":{"type":"mine","id":"2601624","name":"Alligator Ridge Mine"},"validFrom":"1993-12-07","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2601624|L11052|1993-12-07|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M02397","name":"Placer Dome Ltd"},"object":{"type":"operator","id":"L11052","name":"Placer Dome U S Inc"},"validFrom":"1993-12-07","validTo":null,"current":true,"derived":true,"evidenceMineId":"2601624","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2601624|L11052|1993-12-07|M02397|1950-01-01|125234"}}],"coverage":{"historyRecords":4,"edgeCount":12,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"2601624","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"}}