{"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":"4501154","name":"Portable Screening Plant"},"operator":{"type":"operator","id":"0051582","name":"Pacific Rock Products LLC"},"controller":{"type":"controller","id":"M09149","name":"Cemex S A"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L02995","name":"Smithrock Quarry Inc"},"object":{"type":"mine","id":"4501154","name":"Portable Screening Plant"},"validFrom":"1950-01-01","validTo":"1992-02-14","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4501154|L02995|1950-01-01|1992-02-14"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M02461","name":"Rodney H  Smith"},"object":{"type":"mine","id":"4501154","name":"Portable Screening Plant"},"validFrom":"1950-01-01","validTo":"1992-04-14","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4501154|M02461|1950-01-01|1992-04-14"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M02461","name":"Rodney H  Smith"},"object":{"type":"operator","id":"L02995","name":"Smithrock Quarry Inc"},"validFrom":"1950-01-01","validTo":"1992-02-14","current":false,"derived":true,"evidenceMineId":"4501154","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4501154|L02995|1950-01-01|M02461|1950-01-01|125558"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M02119","name":"Eucon Corporation"},"object":{"type":"mine","id":"4501154","name":"Portable Screening Plant"},"validFrom":"1985-04-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4501154|M02119|1985-04-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L14796","name":"Pacific Rock Products Llc"},"object":{"type":"mine","id":"4501154","name":"Portable Screening Plant"},"validFrom":"1992-02-15","validTo":"2000-09-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4501154|L14796|1992-02-15|2000-09-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M02119","name":"Eucon Corporation"},"object":{"type":"operator","id":"L14796","name":"Pacific Rock Products Llc"},"validFrom":"1992-02-15","validTo":"2000-09-30","current":false,"derived":true,"evidenceMineId":"4501154","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4501154|L14796|1992-02-15|M02119|1985-04-01|123797"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L17790","name":"Pacific Rock Products LLC"},"object":{"type":"mine","id":"4501154","name":"Portable Screening Plant"},"validFrom":"2000-10-01","validTo":"2002-09-25","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4501154|L17790|2000-10-01|2002-09-25"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00360","name":"Peter Kiewit Sons' Inc"},"object":{"type":"mine","id":"4501154","name":"Portable Screening Plant"},"validFrom":"2000-10-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4501154|M00360|2000-10-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00360","name":"Peter Kiewit Sons' Inc"},"object":{"type":"operator","id":"L17790","name":"Pacific Rock Products LLC"},"validFrom":"2000-10-01","validTo":"2002-09-25","current":false,"derived":true,"evidenceMineId":"4501154","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4501154|L17790|2000-10-01|M00360|2000-10-01|110215"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0051582","name":"Pacific Rock Products LLC"},"object":{"type":"mine","id":"4501154","name":"Portable Screening Plant"},"validFrom":"2002-09-26","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4501154|0051582|2002-09-26|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M08942","name":"CSR Ltd"},"object":{"type":"mine","id":"4501154","name":"Portable Screening Plant"},"validFrom":"2002-09-26","validTo":"2003-03-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4501154|M08942|2002-09-26|2003-03-31"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M08942","name":"CSR Ltd"},"object":{"type":"operator","id":"0051582","name":"Pacific Rock Products LLC"},"validFrom":"2002-09-26","validTo":"2003-03-31","current":false,"derived":true,"evidenceMineId":"4501154","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4501154|0051582|2002-09-26|M08942|2002-09-26|144673"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0042039","name":"Rinker Group Ltd"},"object":{"type":"mine","id":"4501154","name":"Portable Screening Plant"},"validFrom":"2003-04-01","validTo":"2007-07-09","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4501154|0042039|2003-04-01|2007-07-09"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0042039","name":"Rinker Group Ltd"},"object":{"type":"operator","id":"0051582","name":"Pacific Rock Products LLC"},"validFrom":"2003-04-01","validTo":"2007-07-09","current":false,"derived":true,"evidenceMineId":"4501154","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4501154|0051582|2002-09-26|0042039|2003-04-01|3575"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M09149","name":"Cemex S A"},"object":{"type":"mine","id":"4501154","name":"Portable Screening Plant"},"validFrom":"2007-07-10","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4501154|M09149|2007-07-10|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M09149","name":"Cemex S A"},"object":{"type":"operator","id":"0051582","name":"Pacific Rock Products LLC"},"validFrom":"2007-07-10","validTo":null,"current":true,"derived":true,"evidenceMineId":"4501154","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4501154|0051582|2002-09-26|M09149|2007-07-10|145556"}}],"coverage":{"historyRecords":6,"edgeCount":16,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4501154","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"}}