{"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":"4608065","name":"Seng Camp No 1"},"operator":{"type":"operator","id":"P21483","name":"Ballard Brothers Coal Inc"},"controller":{"type":"controller","id":"C14407","name":"Everett E  Ballard Jr"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C00375","name":"United  Company"},"object":{"type":"mine","id":"4608065","name":"Seng Camp No 1"},"validFrom":"1978-02-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4608065|C00375|1978-02-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C14407","name":"Everett E  Ballard Jr"},"object":{"type":"mine","id":"4608065","name":"Seng Camp No 1"},"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":"4608065|C14407|1991-05-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P12877","name":"Dal-Tex Coal Corp"},"object":{"type":"mine","id":"4608065","name":"Seng Camp No 1"},"validFrom":"1991-07-01","validTo":"1991-09-24","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4608065|P12877|1991-07-01|1991-09-24"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C00375","name":"United  Company"},"object":{"type":"operator","id":"P12877","name":"Dal-Tex Coal Corp"},"validFrom":"1991-07-01","validTo":"1991-09-24","current":false,"derived":true,"evidenceMineId":"4608065","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4608065|P12877|1991-07-01|C00375|1978-02-01|46624"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P21483","name":"Ballard Brothers Coal Inc"},"object":{"type":"mine","id":"4608065","name":"Seng Camp No 1"},"validFrom":"1991-09-25","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4608065|P21483|1991-09-25|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C14407","name":"Everett E  Ballard Jr"},"object":{"type":"operator","id":"P21483","name":"Ballard Brothers Coal Inc"},"validFrom":"1991-09-25","validTo":null,"current":true,"derived":true,"evidenceMineId":"4608065","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4608065|P21483|1991-09-25|C14407|1991-05-01|92715"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4608065","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"}}