{"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":"3102014","name":"Great Pit"},"operator":{"type":"operator","id":"0189413","name":"Blue Ridge Sand Operations LLC"},"controller":{"type":"controller","id":"0177301","name":"Blue Ridge Sand  Holdings LLC"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L37376","name":"Pretty Good Sand Company Inc"},"object":{"type":"mine","id":"3102014","name":"Great Pit"},"validFrom":"1988-03-01","validTo":"2016-05-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3102014|L37376|1988-03-01|2016-05-31"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M37376","name":"Roger E Sauerborn"},"object":{"type":"mine","id":"3102014","name":"Great Pit"},"validFrom":"1988-03-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3102014|M37376|1988-03-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M37376","name":"Roger E Sauerborn"},"object":{"type":"operator","id":"L37376","name":"Pretty Good Sand Company Inc"},"validFrom":"1988-03-01","validTo":"2016-05-31","current":false,"derived":true,"evidenceMineId":"3102014","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3102014|L37376|1988-03-01|M37376|1988-03-01|166607"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0146033","name":"PGS Aggregates, LLC"},"object":{"type":"mine","id":"3102014","name":"Great Pit"},"validFrom":"2016-06-01","validTo":"2023-06-04","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3102014|0146033|2016-06-01|2023-06-04"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0126861","name":"Matthew R Pipkin"},"object":{"type":"mine","id":"3102014","name":"Great Pit"},"validFrom":"2016-06-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3102014|0126861|2016-06-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0126861","name":"Matthew R Pipkin"},"object":{"type":"operator","id":"0146033","name":"PGS Aggregates, LLC"},"validFrom":"2016-06-01","validTo":"2023-06-04","current":false,"derived":true,"evidenceMineId":"3102014","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3102014|0146033|2016-06-01|0126861|2016-06-01|24603"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0189413","name":"Blue Ridge Sand Operations LLC"},"object":{"type":"mine","id":"3102014","name":"Great Pit"},"validFrom":"2023-06-05","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3102014|0189413|2023-06-05|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0177301","name":"Blue Ridge Sand  Holdings LLC"},"object":{"type":"mine","id":"3102014","name":"Great Pit"},"validFrom":"2023-06-05","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3102014|0177301|2023-06-05|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0177301","name":"Blue Ridge Sand  Holdings LLC"},"object":{"type":"operator","id":"0189413","name":"Blue Ridge Sand Operations LLC"},"validFrom":"2023-06-05","validTo":null,"current":true,"derived":true,"evidenceMineId":"3102014","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3102014|0189413|2023-06-05|0177301|2023-06-05|38013"}}],"coverage":{"historyRecords":3,"edgeCount":9,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3102014","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"}}