{"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":"2026-10-17T05:35:58.500035+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":"3201036","name":"Sundhagen Plant #2"},"operator":{"type":"operator","id":"0131876","name":"Sundhagen Sand & Gravel, Inc."},"controller":{"type":"controller","id":"0112165","name":"Larry  Hofmann; Curtis  Waldie"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"0112165","name":"Larry  Hofmann et al"},"object":{"type":"mine","id":"3201036","name":"Sundhagen Plant #2"},"validFrom":"2014-02-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3201036|0112165|2014-02-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0131876","name":"Sundhagen Sand & Gravel, Inc."},"object":{"type":"mine","id":"3201036","name":"Sundhagen Plant #2"},"validFrom":"2014-07-10","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3201036|0131876|2014-07-10|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0112165","name":"Larry  Hofmann et al"},"object":{"type":"operator","id":"0131876","name":"Sundhagen Sand & Gravel, Inc."},"validFrom":"2014-07-10","validTo":null,"current":true,"derived":true,"evidenceMineId":"3201036","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3201036|0131876|2014-07-10|0112165|2014-02-01|20818"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0112165","name":"Curtis  Waldie et al"},"object":{"type":"operator","id":"0131876","name":"Sundhagen Sand & Gravel, Inc."},"validFrom":"2014-07-10","validTo":null,"current":true,"derived":true,"evidenceMineId":"3201036","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3201036|0131876|2014-07-10|0112165|2014-02-01|20819"}}],"coverage":{"historyRecords":2,"edgeCount":4,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3201036","dataSource":"postgres","snapshotId":"2026-10-17T05:35:58.500035+00:00","completedAt":"2026-10-17T06:17:15.228Z","sourceCount":20,"totalRows":15450873,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}