{"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":"4002772","name":"Chesney Surface Mine #3"},"operator":{"type":"operator","id":"L06677","name":"Blue Ridge Mining Company Inc"},"controller":{"type":"controller","id":"M00241","name":"Morrison Knudsen Corp (Old)"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00572","name":"Preston Carroll Enterprises Inc"},"object":{"type":"mine","id":"4002772","name":"Chesney Surface Mine #3"},"validFrom":"1950-01-01","validTo":"1984-09-03","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4002772|M00572|1950-01-01|1984-09-03"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00694","name":"Luttrell Mining Company Inc"},"object":{"type":"mine","id":"4002772","name":"Chesney Surface Mine #3"},"validFrom":"1982-01-01","validTo":"1983-06-21","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4002772|L00694|1982-01-01|1983-06-21"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00572","name":"Preston Carroll Enterprises Inc"},"object":{"type":"operator","id":"L00694","name":"Luttrell Mining Company Inc"},"validFrom":"1982-01-01","validTo":"1983-06-21","current":false,"derived":true,"evidenceMineId":"4002772","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4002772|L00694|1982-01-01|M00572|1950-01-01|113158"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L06677","name":"Blue Ridge Mining Company Inc"},"object":{"type":"mine","id":"4002772","name":"Chesney Surface Mine #3"},"validFrom":"1983-06-22","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4002772|L06677|1983-06-22|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00241","name":"Morrison Knudsen Corp (Old)"},"object":{"type":"mine","id":"4002772","name":"Chesney Surface Mine #3"},"validFrom":"1983-06-22","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4002772|M00241|1983-06-22|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00241","name":"Morrison Knudsen Corp (Old)"},"object":{"type":"operator","id":"L06677","name":"Blue Ridge Mining Company Inc"},"validFrom":"1983-06-22","validTo":null,"current":true,"derived":true,"evidenceMineId":"4002772","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4002772|L06677|1983-06-22|M00241|1983-06-22|108056"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4002772","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"}}