{"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":"1506396","name":"Welco Tipple"},"operator":{"type":"operator","id":"P08266","name":"T & K Mining Company Inc"},"controller":{"type":"controller","id":"C06314","name":"Richard L  Cooper"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01157","name":"Ratcliff Willard"},"object":{"type":"mine","id":"1506396","name":"Welco Tipple"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1506396|C01157|1950-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P01389","name":"T & K Mining Company"},"object":{"type":"mine","id":"1506396","name":"Welco Tipple"},"validFrom":"1973-01-01","validTo":"1976-02-02","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1506396|P01389|1973-01-01|1976-02-02"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01160","name":"T & K Mining Company"},"object":{"type":"mine","id":"1506396","name":"Welco Tipple"},"validFrom":"1973-01-01","validTo":"1976-02-02","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1506396|C01160|1973-01-01|1976-02-02"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01160","name":"T & K Mining Company"},"object":{"type":"operator","id":"P01389","name":"T & K Mining Company"},"validFrom":"1973-01-01","validTo":"1976-02-02","current":false,"derived":true,"evidenceMineId":"1506396","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1506396|P01389|1973-01-01|C01160|1973-01-01|52629"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P01386","name":"Upper Beaver Coal Company Inc"},"object":{"type":"mine","id":"1506396","name":"Welco Tipple"},"validFrom":"1976-02-03","validTo":"1978-04-27","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1506396|P01386|1976-02-03|1978-04-27"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01157","name":"Ratcliff Willard"},"object":{"type":"operator","id":"P01386","name":"Upper Beaver Coal Company Inc"},"validFrom":"1976-02-03","validTo":"1978-04-27","current":false,"derived":true,"evidenceMineId":"1506396","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1506396|P01386|1976-02-03|C01157|1950-01-01|52623"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C06314","name":"Richard L  Cooper"},"object":{"type":"mine","id":"1506396","name":"Welco Tipple"},"validFrom":"1978-04-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1506396|C06314|1978-04-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P08266","name":"T & K Mining Company Inc"},"object":{"type":"mine","id":"1506396","name":"Welco Tipple"},"validFrom":"1978-04-28","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1506396|P08266|1978-04-28|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C06314","name":"Richard L  Cooper"},"object":{"type":"operator","id":"P08266","name":"T & K Mining Company Inc"},"validFrom":"1978-04-28","validTo":null,"current":true,"derived":true,"evidenceMineId":"1506396","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1506396|P08266|1978-04-28|C06314|1978-04-01|71458"}}],"coverage":{"historyRecords":3,"edgeCount":9,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1506396","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"}}