{"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":"2700257","name":"Michie Corporation Con-Agg Pit"},"operator":{"type":"operator","id":"L36222","name":"Michie Corporation"},"controller":{"type":"controller","id":"0144261","name":"Jessica  Prieto; Johanna  Hauptman; Jason  Michie"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L36222","name":"Michie Corporation"},"object":{"type":"mine","id":"2700257","name":"Michie Corporation Con-Agg Pit"},"validFrom":"1985-10-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2700257|L36222|1985-10-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M36222","name":"Pamela  Michie  et al"},"object":{"type":"mine","id":"2700257","name":"Michie Corporation Con-Agg Pit"},"validFrom":"1985-10-01","validTo":"2018-10-11","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2700257|M36222|1985-10-01|2018-10-11"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M36222","name":"Pamela  Michie  et al"},"object":{"type":"operator","id":"L36222","name":"Michie Corporation"},"validFrom":"1985-10-01","validTo":"2018-10-11","current":false,"derived":true,"evidenceMineId":"2700257","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2700257|L36222|1985-10-01|M36222|1985-10-01|165322"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M36222","name":"Alan  Michie  et al"},"object":{"type":"operator","id":"L36222","name":"Michie Corporation"},"validFrom":"1985-10-01","validTo":"2018-10-11","current":false,"derived":true,"evidenceMineId":"2700257","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2700257|L36222|1985-10-01|M36222|1985-10-01|165323"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0144261","name":"Jessica  Prieto et al"},"object":{"type":"mine","id":"2700257","name":"Michie Corporation Con-Agg Pit"},"validFrom":"2018-10-12","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2700257|0144261|2018-10-12|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0144261","name":"Jessica  Prieto et al"},"object":{"type":"operator","id":"L36222","name":"Michie Corporation"},"validFrom":"2018-10-12","validTo":null,"current":true,"derived":true,"evidenceMineId":"2700257","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2700257|L36222|1985-10-01|0144261|2018-10-12|29231"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0144261","name":"Johanna  Hauptman et al"},"object":{"type":"operator","id":"L36222","name":"Michie Corporation"},"validFrom":"2018-10-12","validTo":null,"current":true,"derived":true,"evidenceMineId":"2700257","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2700257|L36222|1985-10-01|0144261|2018-10-12|29232"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0144261","name":"Jason  Michie et al"},"object":{"type":"operator","id":"L36222","name":"Michie Corporation"},"validFrom":"2018-10-12","validTo":null,"current":true,"derived":true,"evidenceMineId":"2700257","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2700257|L36222|1985-10-01|0144261|2018-10-12|29233"}}],"coverage":{"historyRecords":5,"edgeCount":8,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"2700257","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"}}