{"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":"2026-10-18T09:31:49.615908+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":"2002879","name":"G & A Sand & Gravel, L.L.C"},"operator":{"type":"operator","id":"0083984","name":"G & A Sand & Gravel LLC"},"controller":{"type":"controller","id":"0070851","name":"Gregory J  Sherwood; Andrew A  Willbee"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-18T09:31:49.615908+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L34719","name":"Jackson Asphalt Company"},"object":{"type":"mine","id":"2002879","name":"G & A Sand & Gravel, L.L.C"},"validFrom":"1992-06-01","validTo":"2007-04-15","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2002879|L34719|1992-06-01|2007-04-15"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M34719","name":"Ron  Risner"},"object":{"type":"mine","id":"2002879","name":"G & A Sand & Gravel, L.L.C"},"validFrom":"1992-06-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2002879|M34719|1992-06-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M34719","name":"Ron  Risner"},"object":{"type":"operator","id":"L34719","name":"Jackson Asphalt Company"},"validFrom":"1992-06-01","validTo":"2007-04-15","current":false,"derived":true,"evidenceMineId":"2002879","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2002879|L34719|1992-06-01|M34719|1992-06-01|163567"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0083984","name":"G & A Sand & Gravel LLC"},"object":{"type":"mine","id":"2002879","name":"G & A Sand & Gravel, L.L.C"},"validFrom":"2007-04-16","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2002879|0083984|2007-04-16|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0070851","name":"Gregory J  Sherwood et al"},"object":{"type":"mine","id":"2002879","name":"G & A Sand & Gravel, L.L.C"},"validFrom":"2007-04-16","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2002879|0070851|2007-04-16|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0070851","name":"Gregory J  Sherwood et al"},"object":{"type":"operator","id":"0083984","name":"G & A Sand & Gravel LLC"},"validFrom":"2007-04-16","validTo":null,"current":true,"derived":true,"evidenceMineId":"2002879","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2002879|0083984|2007-04-16|0070851|2007-04-16|10167"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0070851","name":"Andrew A  Willbee et al"},"object":{"type":"operator","id":"0083984","name":"G & A Sand & Gravel LLC"},"validFrom":"2007-04-16","validTo":null,"current":true,"derived":true,"evidenceMineId":"2002879","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2002879|0083984|2007-04-16|0070851|2007-04-16|10168"}}],"coverage":{"historyRecords":3,"edgeCount":7,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"2002879","dataSource":"postgres","snapshotId":"2026-10-18T09:31:49.615908+00:00","completedAt":"2026-10-18T09:31:49.615Z","sourceCount":20,"totalRows":17915666,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}