{"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":"4609196","name":"Piedmont Mine"},"operator":{"type":"operator","id":"P24636","name":"Duckworth Coal Inc"},"controller":{"type":"controller","id":"0040547","name":"Jody L  Ritchie"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C16051","name":"Duckworth John David"},"object":{"type":"mine","id":"4609196","name":"Piedmont Mine"},"validFrom":"2001-04-09","validTo":"2002-01-13","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4609196|C16051|2001-04-09|2002-01-13"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C03039","name":"Charles T  Clise Jr"},"object":{"type":"mine","id":"4609196","name":"Piedmont Mine"},"validFrom":"2002-01-14","validTo":"2011-07-28","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4609196|C03039|2002-01-14|2011-07-28"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P24636","name":"Duckworth Coal Inc"},"object":{"type":"mine","id":"4609196","name":"Piedmont Mine"},"validFrom":"2006-12-13","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4609196|P24636|2006-12-13|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C03039","name":"Charles T  Clise Jr"},"object":{"type":"operator","id":"P24636","name":"Duckworth Coal Inc"},"validFrom":"2006-12-13","validTo":"2011-07-28","current":false,"derived":true,"evidenceMineId":"4609196","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4609196|P24636|2006-12-13|C03039|2002-01-14|61755"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C16051","name":"Duckworth John David"},"object":{"type":"operator","id":"P24636","name":"Duckworth Coal Inc"},"validFrom":"2006-12-13","validTo":"2002-01-13","current":false,"derived":true,"evidenceMineId":"4609196","intervalAnomaly":true,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4609196|P24636|2006-12-13|C16051|2001-04-09|98211"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0040547","name":"Jody L  Ritchie"},"object":{"type":"mine","id":"4609196","name":"Piedmont Mine"},"validFrom":"2011-07-29","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4609196|0040547|2011-07-29|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0040547","name":"Jody L  Ritchie"},"object":{"type":"operator","id":"P24636","name":"Duckworth Coal Inc"},"validFrom":"2011-07-29","validTo":null,"current":true,"derived":true,"evidenceMineId":"4609196","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4609196|P24636|2006-12-13|0040547|2011-07-29|203"}}],"coverage":{"historyRecords":3,"edgeCount":7,"intervalAnomalies":1,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4609196","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"}}