{"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":"4104099","name":"Leona Rock Quarry"},"operator":{"type":"operator","id":"L17181","name":"8-Mile Ranch Inc"},"controller":{"type":"controller","id":"M13101","name":"J E  Willingham IV"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L16869","name":"J & A Enterprize"},"object":{"type":"mine","id":"4104099","name":"Leona Rock Quarry"},"validFrom":"1999-08-01","validTo":"1999-11-23","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4104099|L16869|1999-08-01|1999-11-23"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M12882","name":"George  McDonald et al"},"object":{"type":"mine","id":"4104099","name":"Leona Rock Quarry"},"validFrom":"1999-08-01","validTo":"1999-11-23","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4104099|M12882|1999-08-01|1999-11-23"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M12882","name":"George  McDonald et al"},"object":{"type":"operator","id":"L16869","name":"J & A Enterprize"},"validFrom":"1999-08-01","validTo":"1999-11-23","current":false,"derived":true,"evidenceMineId":"4104099","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4104099|L16869|1999-08-01|M12882|1999-08-01|154845"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L17181","name":"8-Mile Ranch Inc"},"object":{"type":"mine","id":"4104099","name":"Leona Rock Quarry"},"validFrom":"1999-11-24","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4104099|L17181|1999-11-24|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M13101","name":"J E  Willingham IV"},"object":{"type":"mine","id":"4104099","name":"Leona Rock Quarry"},"validFrom":"1999-11-24","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4104099|M13101|1999-11-24|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M13101","name":"J E  Willingham IV"},"object":{"type":"operator","id":"L17181","name":"8-Mile Ranch Inc"},"validFrom":"1999-11-24","validTo":null,"current":true,"derived":true,"evidenceMineId":"4104099","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4104099|L17181|1999-11-24|M13101|1999-11-24|155483"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4104099","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"}}