{"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":"3607129","name":"No 1 Slope"},"operator":{"type":"operator","id":"P22191","name":"B & K Coal Company"},"controller":{"type":"controller","id":"C12236","name":"Yost William S"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P11800","name":"Barrett Coal Company"},"object":{"type":"mine","id":"3607129","name":"No 1 Slope"},"validFrom":"1981-05-01","validTo":"1984-11-19","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3607129|P11800|1981-05-01|1984-11-19"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C08792","name":"Barrett Orren S Et Al"},"object":{"type":"mine","id":"3607129","name":"No 1 Slope"},"validFrom":"1981-05-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3607129|C08792|1981-05-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C08792","name":"Barrett Orren S Et Al"},"object":{"type":"operator","id":"P11800","name":"Barrett Coal Company"},"validFrom":"1981-05-01","validTo":"1984-11-19","current":false,"derived":true,"evidenceMineId":"3607129","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3607129|P11800|1981-05-01|C08792|1981-05-01|78165"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P16577","name":"Skyline Coal Company"},"object":{"type":"mine","id":"3607129","name":"No 1 Slope"},"validFrom":"1984-11-20","validTo":"1991-12-16","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3607129|P16577|1984-11-20|1991-12-16"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C09016","name":"Shiko David R"},"object":{"type":"mine","id":"3607129","name":"No 1 Slope"},"validFrom":"1984-11-20","validTo":"1991-12-16","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3607129|C09016|1984-11-20|1991-12-16"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C09016","name":"Shiko David R"},"object":{"type":"operator","id":"P16577","name":"Skyline Coal Company"},"validFrom":"1984-11-20","validTo":"1991-12-16","current":false,"derived":true,"evidenceMineId":"3607129","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3607129|P16577|1984-11-20|C09016|1984-11-20|78714"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P21755","name":"Skyline Coal Company"},"object":{"type":"mine","id":"3607129","name":"No 1 Slope"},"validFrom":"1991-12-17","validTo":"1992-11-05","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3607129|P21755|1991-12-17|1992-11-05"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C14549","name":"Yost Mary"},"object":{"type":"mine","id":"3607129","name":"No 1 Slope"},"validFrom":"1991-12-17","validTo":"1992-11-05","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3607129|C14549|1991-12-17|1992-11-05"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C14549","name":"Yost Mary"},"object":{"type":"operator","id":"P21755","name":"Skyline Coal Company"},"validFrom":"1991-12-17","validTo":"1992-11-05","current":false,"derived":true,"evidenceMineId":"3607129","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3607129|P21755|1991-12-17|C14549|1991-12-17|93259"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P22191","name":"B & K Coal Company"},"object":{"type":"mine","id":"3607129","name":"No 1 Slope"},"validFrom":"1992-11-06","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3607129|P22191|1992-11-06|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C12236","name":"Yost William S"},"object":{"type":"mine","id":"3607129","name":"No 1 Slope"},"validFrom":"1992-11-06","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3607129|C12236|1992-11-06|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C12236","name":"Yost William S"},"object":{"type":"operator","id":"P22191","name":"B & K Coal Company"},"validFrom":"1992-11-06","validTo":null,"current":true,"derived":true,"evidenceMineId":"3607129","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3607129|P22191|1992-11-06|C12236|1992-11-06|86446"}}],"coverage":{"historyRecords":4,"edgeCount":12,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3607129","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"}}