{"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":"3200218","name":"Center Mine"},"operator":{"type":"operator","id":"P20244","name":"BNI Coal, Ltd"},"controller":{"type":"controller","id":"C13807","name":"Allete Inc"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P00198","name":"Baukol-Noonan Inc"},"object":{"type":"mine","id":"3200218","name":"Center Mine"},"validFrom":"1950-01-01","validTo":"1988-11-16","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3200218|P00198|1950-01-01|1988-11-16"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C00147","name":"R W  Rovelstad et al"},"object":{"type":"mine","id":"3200218","name":"Center 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":"3200218|C00147|1950-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C00147","name":"R W  Rovelstad et al"},"object":{"type":"operator","id":"P00198","name":"Baukol-Noonan Inc"},"validFrom":"1950-01-01","validTo":"1988-11-16","current":false,"derived":true,"evidenceMineId":"3200218","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3200218|P00198|1950-01-01|C00147|1950-01-01|44491"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C00147","name":"L A  Rutherford et al"},"object":{"type":"operator","id":"P00198","name":"Baukol-Noonan Inc"},"validFrom":"1950-01-01","validTo":"1988-11-16","current":false,"derived":true,"evidenceMineId":"3200218","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3200218|P00198|1950-01-01|C00147|1950-01-01|44492"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P20244","name":"BNI Coal, Ltd"},"object":{"type":"mine","id":"3200218","name":"Center Mine"},"validFrom":"1988-11-17","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3200218|P20244|1988-11-17|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C13807","name":"Allete Inc"},"object":{"type":"mine","id":"3200218","name":"Center Mine"},"validFrom":"1988-11-17","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3200218|C13807|1988-11-17|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C13807","name":"Allete Inc"},"object":{"type":"operator","id":"P20244","name":"BNI Coal, Ltd"},"validFrom":"1988-11-17","validTo":null,"current":true,"derived":true,"evidenceMineId":"3200218","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3200218|P20244|1988-11-17|C13807|1988-11-17|91217"}}],"coverage":{"historyRecords":3,"edgeCount":7,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3200218","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"}}