{"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":"0405802","name":"PORTABLE PLANT #1"},"operator":{"type":"operator","id":"0151273","name":"QUALITY AGGREGATES INC."},"controller":{"type":"controller","id":"M11813","name":"Dave  Beck"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"0109369","name":"Aggtech, Inc."},"object":{"type":"mine","id":"0405802","name":"PORTABLE PLANT #1"},"validFrom":"2010-04-26","validTo":"2017-05-21","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0405802|0109369|2010-04-26|2017-05-21"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0041075","name":"Stan  Houck"},"object":{"type":"mine","id":"0405802","name":"PORTABLE PLANT #1"},"validFrom":"2010-04-26","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0405802|0041075|2010-04-26|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0041075","name":"Stan  Houck"},"object":{"type":"operator","id":"0109369","name":"Aggtech, Inc."},"validFrom":"2010-04-26","validTo":"2017-05-21","current":false,"derived":true,"evidenceMineId":"0405802","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0405802|0109369|2010-04-26|0041075|2010-04-26|1371"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0151273","name":"QUALITY AGGREGATES INC."},"object":{"type":"mine","id":"0405802","name":"PORTABLE PLANT #1"},"validFrom":"2017-05-22","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0405802|0151273|2017-05-22|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M11813","name":"Dave  Beck"},"object":{"type":"mine","id":"0405802","name":"PORTABLE PLANT #1"},"validFrom":"2017-05-22","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0405802|M11813|2017-05-22|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M11813","name":"Dave  Beck"},"object":{"type":"operator","id":"0151273","name":"QUALITY AGGREGATES INC."},"validFrom":"2017-05-22","validTo":null,"current":true,"derived":true,"evidenceMineId":"0405802","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0405802|0151273|2017-05-22|M11813|2017-05-22|152477"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"0405802","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"}}