{"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":"2026-10-17T05:35:58.500035+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":"3600117","name":"Lehigh Asphalt Paving & Construction Co"},"operator":{"type":"operator","id":"L14917","name":"Lehigh Asphalt Paving & Construction Co"},"controller":{"type":"controller","id":"M01622","name":"Glasgow Inc"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00422","name":"Huss Contracting Company"},"object":{"type":"mine","id":"3600117","name":"Lehigh Asphalt Paving & Construction Co"},"validFrom":"1950-01-01","validTo":"1996-01-10","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3600117|L00422|1950-01-01|1996-01-10"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M01086","name":"Luther T Blew Contracting Company Inc"},"object":{"type":"mine","id":"3600117","name":"Lehigh Asphalt Paving & Construction Co"},"validFrom":"1950-01-01","validTo":"1996-01-10","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3600117|M01086|1950-01-01|1996-01-10"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M01086","name":"Luther T Blew Contracting Company Inc"},"object":{"type":"operator","id":"L00422","name":"Huss Contracting Company"},"validFrom":"1950-01-01","validTo":"1996-01-10","current":false,"derived":true,"evidenceMineId":"3600117","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3600117|L00422|1950-01-01|M01086|1950-01-01|116790"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L14917","name":"Lehigh Asphalt Paving & Construction Co"},"object":{"type":"mine","id":"3600117","name":"Lehigh Asphalt Paving & Construction Co"},"validFrom":"1996-01-11","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3600117|L14917|1996-01-11|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M01622","name":"Glasgow Inc"},"object":{"type":"mine","id":"3600117","name":"Lehigh Asphalt Paving & Construction Co"},"validFrom":"1996-01-11","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3600117|M01622|1996-01-11|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M01622","name":"Glasgow Inc"},"object":{"type":"operator","id":"L14917","name":"Lehigh Asphalt Paving & Construction Co"},"validFrom":"1996-01-11","validTo":null,"current":true,"derived":true,"evidenceMineId":"3600117","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3600117|L14917|1996-01-11|M01622|1996-01-11|119708"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3600117","dataSource":"postgres","snapshotId":"2026-10-17T05:35:58.500035+00:00","completedAt":"2026-10-17T06:17:15.228Z","sourceCount":20,"totalRows":15450873,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}