{"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":"2402601","name":"Portable 2"},"operator":{"type":"operator","id":"0092445","name":"Valley Sand & Gravel LLC"},"controller":{"type":"controller","id":"M39787","name":"Larry K  Smith"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M39787","name":"Larry K  Smith"},"object":{"type":"mine","id":"2402601","name":"Portable 2"},"validFrom":"2008-04-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2402601|M39787|2008-04-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0092445","name":"Valley Sand & Gravel LLC"},"object":{"type":"mine","id":"2402601","name":"Portable 2"},"validFrom":"2011-08-25","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2402601|0092445|2011-08-25|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M39787","name":"Larry K  Smith"},"object":{"type":"operator","id":"0092445","name":"Valley Sand & Gravel LLC"},"validFrom":"2011-08-25","validTo":null,"current":true,"derived":true,"evidenceMineId":"2402601","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2402601|0092445|2011-08-25|M39787|2008-04-01|169384"}}],"coverage":{"historyRecords":1,"edgeCount":3,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"2402601","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"}}