{"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":"0901232","name":"Millen Plant"},"operator":{"type":"operator","id":"L14417","name":"US Silica Company"},"controller":{"type":"controller","id":"M11007","name":"USS Holdings Inc"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M07611","name":"Gary A  Kolstad et al"},"object":{"type":"mine","id":"0901232","name":"Millen Plant"},"validFrom":"1987-06-30","validTo":"2020-06-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0901232|M07611|1987-06-30|2020-06-30"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M11007","name":"USS Holdings Inc"},"object":{"type":"mine","id":"0901232","name":"Millen Plant"},"validFrom":"1996-03-09","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0901232|M11007|1996-03-09|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L09717","name":"CARBO Ceramics"},"object":{"type":"mine","id":"0901232","name":"Millen Plant"},"validFrom":"2014-09-12","validTo":"2019-05-13","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0901232|L09717|2014-09-12|2019-05-13"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M07611","name":"Gary A  Kolstad et al"},"object":{"type":"operator","id":"L09717","name":"CARBO Ceramics"},"validFrom":"2014-09-12","validTo":"2019-05-13","current":false,"derived":true,"evidenceMineId":"0901232","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0901232|L09717|2014-09-12|M07611|1987-06-30|141611"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L14417","name":"US Silica Company"},"object":{"type":"mine","id":"0901232","name":"Millen Plant"},"validFrom":"2019-05-14","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0901232|L14417|2019-05-14|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M11007","name":"USS Holdings Inc"},"object":{"type":"operator","id":"L14417","name":"US Silica Company"},"validFrom":"2019-05-14","validTo":null,"current":true,"derived":true,"evidenceMineId":"0901232","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0901232|L14417|2019-05-14|M11007|1996-03-09|150462"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0137421","name":"Wilks Brothers LLC"},"object":{"type":"mine","id":"0901232","name":"Millen Plant"},"validFrom":"2020-07-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0901232|0137421|2020-07-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0137421","name":"Wilks Brothers LLC"},"object":{"type":"operator","id":"L09717","name":"CARBO Ceramics"},"validFrom":"2020-07-01","validTo":"2019-05-13","current":false,"derived":true,"evidenceMineId":"0901232","intervalAnomaly":true,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0901232|L09717|2014-09-12|0137421|2020-07-01|27793"}}],"coverage":{"historyRecords":3,"edgeCount":8,"intervalAnomalies":1,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"0901232","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"}}