{"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":"0504881","name":"Silt Plant"},"operator":{"type":"operator","id":"0110845","name":"Western Slope Materials, LLC"},"controller":{"type":"controller","id":"0131241","name":"David  Stewart; Travis J Stewart"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"0083325","name":"Silt Sand and Gravel"},"object":{"type":"mine","id":"0504881","name":"Silt Plant"},"validFrom":"2007-09-04","validTo":"2010-06-16","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0504881|0083325|2007-09-04|2010-06-16"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M40154","name":"Wiliam M  Roberts"},"object":{"type":"mine","id":"0504881","name":"Silt Plant"},"validFrom":"2007-09-04","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0504881|M40154|2007-09-04|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M40154","name":"Wiliam M  Roberts"},"object":{"type":"operator","id":"0083325","name":"Silt Sand and Gravel"},"validFrom":"2007-09-04","validTo":"2010-06-16","current":false,"derived":true,"evidenceMineId":"0504881","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0504881|0083325|2007-09-04|M40154|2007-09-04|169805"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0110845","name":"Western Slope Materials, LLC"},"object":{"type":"mine","id":"0504881","name":"Silt Plant"},"validFrom":"2010-06-17","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0504881|0110845|2010-06-17|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0093733","name":"Travis J  Stewart et al"},"object":{"type":"mine","id":"0504881","name":"Silt Plant"},"validFrom":"2010-06-17","validTo":"2016-10-04","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0504881|0093733|2010-06-17|2016-10-04"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0093733","name":"Travis J  Stewart et al"},"object":{"type":"operator","id":"0110845","name":"Western Slope Materials, LLC"},"validFrom":"2010-06-17","validTo":"2016-10-04","current":false,"derived":true,"evidenceMineId":"0504881","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0504881|0110845|2010-06-17|0093733|2010-06-17|15356"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0093733","name":"William M  Roberts et al"},"object":{"type":"operator","id":"0110845","name":"Western Slope Materials, LLC"},"validFrom":"2010-06-17","validTo":"2016-10-04","current":false,"derived":true,"evidenceMineId":"0504881","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0504881|0110845|2010-06-17|0093733|2010-06-17|15357"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0131241","name":"Travis J Stewart et al"},"object":{"type":"mine","id":"0504881","name":"Silt Plant"},"validFrom":"2016-10-05","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0504881|0131241|2016-10-05|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0131241","name":"Travis J Stewart et al"},"object":{"type":"operator","id":"0110845","name":"Western Slope Materials, LLC"},"validFrom":"2016-10-05","validTo":null,"current":true,"derived":true,"evidenceMineId":"0504881","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0504881|0110845|2010-06-17|0131241|2016-10-05|26335"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0131241","name":"David  Stewart et al"},"object":{"type":"operator","id":"0110845","name":"Western Slope Materials, LLC"},"validFrom":"2016-10-05","validTo":null,"current":true,"derived":true,"evidenceMineId":"0504881","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0504881|0110845|2010-06-17|0131241|2016-10-05|26336"}}],"coverage":{"historyRecords":5,"edgeCount":10,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"0504881","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"}}