{"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":"1512797","name":"Highsplint No 1 Mine"},"operator":{"type":"operator","id":"P13828","name":"Eagle Rock Coal Corp"},"controller":{"type":"controller","id":"C10080","name":"Martin Arnold"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P11911","name":"Verda Coal Sales/Bon Trucking Company"},"object":{"type":"mine","id":"1512797","name":"Highsplint No 1 Mine"},"validFrom":"1981-03-01","validTo":"1982-09-12","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1512797|P11911|1981-03-01|1982-09-12"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01659","name":"Harvey  Napier"},"object":{"type":"mine","id":"1512797","name":"Highsplint No 1 Mine"},"validFrom":"1981-03-01","validTo":"1982-09-12","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1512797|C01659|1981-03-01|1982-09-12"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01659","name":"Harvey  Napier"},"object":{"type":"operator","id":"P11911","name":"Verda Coal Sales/Bon Trucking Company"},"validFrom":"1981-03-01","validTo":"1982-09-12","current":false,"derived":true,"evidenceMineId":"1512797","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1512797|P11911|1981-03-01|C01659|1981-03-01|55500"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P13828","name":"Eagle Rock Coal Corp"},"object":{"type":"mine","id":"1512797","name":"Highsplint No 1 Mine"},"validFrom":"1982-09-13","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1512797|P13828|1982-09-13|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C10080","name":"Martin Arnold"},"object":{"type":"mine","id":"1512797","name":"Highsplint No 1 Mine"},"validFrom":"1982-09-13","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1512797|C10080|1982-09-13|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C10080","name":"Martin Arnold"},"object":{"type":"operator","id":"P13828","name":"Eagle Rock Coal Corp"},"validFrom":"1982-09-13","validTo":null,"current":true,"derived":true,"evidenceMineId":"1512797","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1512797|P13828|1982-09-13|C10080|1982-09-13|81207"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1512797","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"}}