{"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":"3503350","name":"PC-200"},"operator":{"type":"operator","id":"L09002","name":"Tidewater Contractors, Inc."},"controller":{"type":"controller","id":"0177160","name":"George Harold Fitzhugh; John David Baldwin"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M07106","name":"Dave  Baldwin et al"},"object":{"type":"mine","id":"3503350","name":"PC-200"},"validFrom":"1979-01-01","validTo":"2023-05-14","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3503350|M07106|1979-01-01|2023-05-14"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L09002","name":"Tidewater Contractors, Inc."},"object":{"type":"mine","id":"3503350","name":"PC-200"},"validFrom":"1991-05-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3503350|L09002|1991-05-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M07106","name":"Dave  Baldwin et al"},"object":{"type":"operator","id":"L09002","name":"Tidewater Contractors, Inc."},"validFrom":"1991-05-01","validTo":"2023-05-14","current":false,"derived":true,"evidenceMineId":"3503350","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3503350|L09002|1991-05-01|M07106|1979-01-01|140080"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M07106","name":"Jess  Fitzhugh et al"},"object":{"type":"operator","id":"L09002","name":"Tidewater Contractors, Inc."},"validFrom":"1991-05-01","validTo":"2023-05-14","current":false,"derived":true,"evidenceMineId":"3503350","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3503350|L09002|1991-05-01|M07106|1979-01-01|140081"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0177160","name":"George Harold Fitzhugh et al"},"object":{"type":"mine","id":"3503350","name":"PC-200"},"validFrom":"2023-05-15","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3503350|0177160|2023-05-15|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0177160","name":"George Harold Fitzhugh et al"},"object":{"type":"operator","id":"L09002","name":"Tidewater Contractors, Inc."},"validFrom":"2023-05-15","validTo":null,"current":true,"derived":true,"evidenceMineId":"3503350","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3503350|L09002|1991-05-01|0177160|2023-05-15|37990"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0177160","name":"John David Baldwin et al"},"object":{"type":"operator","id":"L09002","name":"Tidewater Contractors, Inc."},"validFrom":"2023-05-15","validTo":null,"current":true,"derived":true,"evidenceMineId":"3503350","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3503350|L09002|1991-05-01|0177160|2023-05-15|37991"}}],"coverage":{"historyRecords":4,"edgeCount":7,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3503350","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"}}