{"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":"2100079","name":"SHAKOPEE PLANT"},"operator":{"type":"operator","id":"L15618","name":"Camas Minnesota"},"controller":{"type":"controller","id":"M07336","name":"Aggregate Industries PLC"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L01091","name":"J L Shiely Company"},"object":{"type":"mine","id":"2100079","name":"SHAKOPEE PLANT"},"validFrom":"1950-01-01","validTo":"1988-07-18","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2100079|L01091|1950-01-01|1988-07-18"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00951","name":"J L Shiely  Company"},"object":{"type":"mine","id":"2100079","name":"SHAKOPEE PLANT"},"validFrom":"1950-01-01","validTo":"1988-07-18","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2100079|M00951|1950-01-01|1988-07-18"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00951","name":"J L Shiely  Company"},"object":{"type":"operator","id":"L01091","name":"J L Shiely Company"},"validFrom":"1950-01-01","validTo":"1988-07-18","current":false,"derived":true,"evidenceMineId":"2100079","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2100079|L01091|1950-01-01|M00951|1950-01-01|116110"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L10566","name":"Shiely Company"},"object":{"type":"mine","id":"2100079","name":"SHAKOPEE PLANT"},"validFrom":"1988-07-19","validTo":"1994-09-21","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2100079|L10566|1988-07-19|1994-09-21"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00025","name":"English China Clays PLC"},"object":{"type":"mine","id":"2100079","name":"SHAKOPEE PLANT"},"validFrom":"1988-07-19","validTo":"1994-09-21","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2100079|M00025|1988-07-19|1994-09-21"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00025","name":"English China Clays PLC"},"object":{"type":"operator","id":"L10566","name":"Shiely Company"},"validFrom":"1988-07-19","validTo":"1994-09-21","current":false,"derived":true,"evidenceMineId":"2100079","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2100079|L10566|1988-07-19|M00025|1988-07-19|102096"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L13853","name":"Shiely Company"},"object":{"type":"mine","id":"2100079","name":"SHAKOPEE PLANT"},"validFrom":"1994-09-22","validTo":"1997-05-13","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2100079|L13853|1994-09-22|1997-05-13"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M10584","name":"Camas Plc"},"object":{"type":"mine","id":"2100079","name":"SHAKOPEE PLANT"},"validFrom":"1994-09-22","validTo":"1997-05-13","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2100079|M10584|1994-09-22|1997-05-13"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M10584","name":"Camas Plc"},"object":{"type":"operator","id":"L13853","name":"Shiely Company"},"validFrom":"1994-09-22","validTo":"1997-05-13","current":false,"derived":true,"evidenceMineId":"2100079","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2100079|L13853|1994-09-22|M10584|1994-09-22|149530"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M07336","name":"Aggregate Industries PLC"},"object":{"type":"mine","id":"2100079","name":"SHAKOPEE PLANT"},"validFrom":"1995-10-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2100079|M07336|1995-10-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L15618","name":"Camas Minnesota"},"object":{"type":"mine","id":"2100079","name":"SHAKOPEE PLANT"},"validFrom":"1997-05-14","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2100079|L15618|1997-05-14|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M07336","name":"Aggregate Industries PLC"},"object":{"type":"operator","id":"L15618","name":"Camas Minnesota"},"validFrom":"1997-05-14","validTo":null,"current":true,"derived":true,"evidenceMineId":"2100079","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2100079|L15618|1997-05-14|M07336|1995-10-01|140839"}}],"coverage":{"historyRecords":4,"edgeCount":12,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"2100079","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"}}