{"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":"1513563","name":"No 8"},"operator":{"type":"operator","id":"P23189","name":"Kem Coal Company"},"controller":{"type":"controller","id":"C13562","name":"James River Coal Company"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C00530","name":"Kaneb Services Inc"},"object":{"type":"mine","id":"1513563","name":"No 8"},"validFrom":"1978-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1513563|C00530|1978-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P07882","name":"Highland Coal Inc"},"object":{"type":"mine","id":"1513563","name":"No 8"},"validFrom":"1982-06-01","validTo":"1985-06-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1513563|P07882|1982-06-01|1985-06-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C00530","name":"Kaneb Services Inc"},"object":{"type":"operator","id":"P07882","name":"Highland Coal Inc"},"validFrom":"1982-06-01","validTo":"1985-06-30","current":false,"derived":true,"evidenceMineId":"1513563","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1513563|P07882|1982-06-01|C00530|1978-01-01|47911"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P17005","name":"Kem Coal Inc"},"object":{"type":"mine","id":"1513563","name":"No 8"},"validFrom":"1985-07-01","validTo":"1995-06-19","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1513563|P17005|1985-07-01|1995-06-19"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C09784","name":"Williams Companies Inc"},"object":{"type":"mine","id":"1513563","name":"No 8"},"validFrom":"1985-07-01","validTo":"1995-06-19","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1513563|C09784|1985-07-01|1995-06-19"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C09784","name":"Williams Companies Inc"},"object":{"type":"operator","id":"P17005","name":"Kem Coal Inc"},"validFrom":"1985-07-01","validTo":"1995-06-19","current":false,"derived":true,"evidenceMineId":"1513563","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1513563|P17005|1985-07-01|C09784|1985-07-01|80541"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P23189","name":"Kem Coal Company"},"object":{"type":"mine","id":"1513563","name":"No 8"},"validFrom":"1995-06-20","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1513563|P23189|1995-06-20|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C13562","name":"James River Coal Company"},"object":{"type":"mine","id":"1513563","name":"No 8"},"validFrom":"1995-06-20","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1513563|C13562|1995-06-20|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C13562","name":"James River Coal Company"},"object":{"type":"operator","id":"P23189","name":"Kem Coal Company"},"validFrom":"1995-06-20","validTo":null,"current":true,"derived":true,"evidenceMineId":"1513563","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1513563|P23189|1995-06-20|C13562|1995-06-20|90378"}}],"coverage":{"historyRecords":3,"edgeCount":9,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1513563","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"}}