{"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":"4604761","name":"B & L Excavating Quarry"},"operator":{"type":"operator","id":"L06610","name":"B & L Excavating Company"},"controller":{"type":"controller","id":"M05266","name":"Craig  St Clair"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L01158","name":"State Construction Inc"},"object":{"type":"mine","id":"4604761","name":"B & L Excavating Quarry"},"validFrom":"1950-01-01","validTo":"1983-07-06","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4604761|L01158|1950-01-01|1983-07-06"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M01009","name":"R E  Troy"},"object":{"type":"mine","id":"4604761","name":"B & L Excavating Quarry"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4604761|M01009|1950-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M01009","name":"R E  Troy"},"object":{"type":"operator","id":"L01158","name":"State Construction Inc"},"validFrom":"1950-01-01","validTo":"1983-07-06","current":false,"derived":true,"evidenceMineId":"4604761","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4604761|L01158|1950-01-01|M01009|1950-01-01|116454"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L06610","name":"B & L Excavating Company"},"object":{"type":"mine","id":"4604761","name":"B & L Excavating Quarry"},"validFrom":"1983-07-07","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4604761|L06610|1983-07-07|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M05266","name":"Craig  St Clair"},"object":{"type":"mine","id":"4604761","name":"B & L Excavating Quarry"},"validFrom":"1983-07-07","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4604761|M05266|1983-07-07|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M05266","name":"Craig  St Clair"},"object":{"type":"operator","id":"L06610","name":"B & L Excavating Company"},"validFrom":"1983-07-07","validTo":null,"current":true,"derived":true,"evidenceMineId":"4604761","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4604761|L06610|1983-07-07|M05266|1983-07-07|134082"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4604761","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"}}