{"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":"0301866","name":"Sevier County Aggregates"},"operator":{"type":"operator","id":"0050573","name":"Sevier County Aggregates"},"controller":{"type":"controller","id":"0041685","name":"James W  Barfield"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"0050573","name":"Sevier County Aggregates"},"object":{"type":"mine","id":"0301866","name":"Sevier County Aggregates"},"validFrom":"2002-07-16","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0301866|0050573|2002-07-16|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0040931","name":"Ray  Hunt Et Al"},"object":{"type":"mine","id":"0301866","name":"Sevier County Aggregates"},"validFrom":"2002-07-16","validTo":"2002-08-23","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0301866|0040931|2002-07-16|2002-08-23"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0040931","name":"Ray  Hunt Et Al"},"object":{"type":"operator","id":"0050573","name":"Sevier County Aggregates"},"validFrom":"2002-07-16","validTo":"2002-08-23","current":false,"derived":true,"evidenceMineId":"0301866","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0301866|0050573|2002-07-16|0040931|2002-07-16|986"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0041685","name":"James W  Barfield"},"object":{"type":"mine","id":"0301866","name":"Sevier County Aggregates"},"validFrom":"2002-08-24","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0301866|0041685|2002-08-24|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0041685","name":"James W  Barfield"},"object":{"type":"operator","id":"0050573","name":"Sevier County Aggregates"},"validFrom":"2002-08-24","validTo":null,"current":true,"derived":true,"evidenceMineId":"0301866","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0301866|0050573|2002-07-16|0041685|2002-08-24|2977"}}],"coverage":{"historyRecords":2,"edgeCount":5,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"0301866","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"}}