{"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":"4402616","name":"Surface Mine No 1"},"operator":{"type":"operator","id":"P02986","name":"B & C Elkhorn Coal Co Inc"},"controller":{"type":"controller","id":"C02553","name":"Belcher Danny C"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P02984","name":"Rex Coal Co"},"object":{"type":"mine","id":"4402616","name":"Surface Mine No 1"},"validFrom":"1950-01-01","validTo":"1973-11-15","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4402616|P02984|1950-01-01|1973-11-15"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C02551","name":"Rex Coal Company"},"object":{"type":"mine","id":"4402616","name":"Surface Mine No 1"},"validFrom":"1950-01-01","validTo":"1973-11-15","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4402616|C02551|1950-01-01|1973-11-15"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C02551","name":"Rex Coal Company"},"object":{"type":"operator","id":"P02984","name":"Rex Coal Co"},"validFrom":"1950-01-01","validTo":"1973-11-15","current":false,"derived":true,"evidenceMineId":"4402616","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4402616|P02984|1950-01-01|C02551|1950-01-01|59933"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P02985","name":"Cardinal Coal Co"},"object":{"type":"mine","id":"4402616","name":"Surface Mine No 1"},"validFrom":"1973-11-16","validTo":"1974-08-15","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4402616|P02985|1973-11-16|1974-08-15"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C02552","name":"Cardinal Coal Company"},"object":{"type":"mine","id":"4402616","name":"Surface Mine No 1"},"validFrom":"1973-11-16","validTo":"1974-08-15","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4402616|C02552|1973-11-16|1974-08-15"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C02552","name":"Cardinal Coal Company"},"object":{"type":"operator","id":"P02985","name":"Cardinal Coal Co"},"validFrom":"1973-11-16","validTo":"1974-08-15","current":false,"derived":true,"evidenceMineId":"4402616","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4402616|P02985|1973-11-16|C02552|1973-11-16|59934"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P02986","name":"B & C Elkhorn Coal Co Inc"},"object":{"type":"mine","id":"4402616","name":"Surface Mine No 1"},"validFrom":"1974-08-16","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4402616|P02986|1974-08-16|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C02553","name":"Belcher Danny C"},"object":{"type":"mine","id":"4402616","name":"Surface Mine No 1"},"validFrom":"1974-08-16","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4402616|C02553|1974-08-16|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C02553","name":"Belcher Danny C"},"object":{"type":"operator","id":"P02986","name":"B & C Elkhorn Coal Co Inc"},"validFrom":"1974-08-16","validTo":null,"current":true,"derived":true,"evidenceMineId":"4402616","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4402616|P02986|1974-08-16|C02553|1974-08-16|59935"}}],"coverage":{"historyRecords":3,"edgeCount":9,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4402616","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"}}