{"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":"1519880","name":"Huff Br. #1"},"operator":{"type":"operator","id":"0211054","name":"Low Vol Coal, LLC"},"controller":{"type":"controller","id":"0170421","name":"Geoff  Coady"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C14616","name":"Charles  Collins"},"object":{"type":"mine","id":"1519880","name":"Huff Br. #1"},"validFrom":"2013-06-27","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1519880|C14616|2013-06-27|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0129775","name":"JRC Mining, Inc."},"object":{"type":"mine","id":"1519880","name":"Huff Br. #1"},"validFrom":"2020-02-21","validTo":"2026-08-25","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1519880|0129775|2020-02-21|2026-08-25"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C14616","name":"Charles  Collins"},"object":{"type":"operator","id":"0129775","name":"JRC Mining, Inc."},"validFrom":"2020-02-21","validTo":"2026-08-25","current":false,"derived":true,"evidenceMineId":"1519880","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1519880|0129775|2020-02-21|C14616|2013-06-27|93437"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0170421","name":"Geoff  Coady"},"object":{"type":"mine","id":"1519880","name":"Huff Br. #1"},"validFrom":"2026-07-14","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1519880|0170421|2026-07-14|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0211054","name":"Low Vol Coal, LLC"},"object":{"type":"mine","id":"1519880","name":"Huff Br. #1"},"validFrom":"2026-08-26","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1519880|0211054|2026-08-26|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0170421","name":"Geoff  Coady"},"object":{"type":"operator","id":"0211054","name":"Low Vol Coal, LLC"},"validFrom":"2026-08-26","validTo":null,"current":true,"derived":true,"evidenceMineId":"1519880","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1519880|0211054|2026-08-26|0170421|2026-07-14|36106"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1519880","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"}}