{"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":"2301896","name":"SMITH SAND & GRAVEL LLC"},"operator":{"type":"operator","id":"0157255","name":"Smith Sand & Gravel Llc"},"controller":{"type":"controller","id":"0141045","name":"Daniel  Bruns; Patrick  Wessels"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L07422","name":"Webber Sand & Gravel Inc"},"object":{"type":"mine","id":"2301896","name":"SMITH SAND & GRAVEL LLC"},"validFrom":"1984-05-01","validTo":"1984-11-12","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2301896|L07422|1984-05-01|1984-11-12"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M05906","name":"John H  Webber"},"object":{"type":"mine","id":"2301896","name":"SMITH SAND & GRAVEL LLC"},"validFrom":"1984-05-01","validTo":"1984-11-12","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2301896|M05906|1984-05-01|1984-11-12"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M05906","name":"John H  Webber"},"object":{"type":"operator","id":"L07422","name":"Webber Sand & Gravel Inc"},"validFrom":"1984-05-01","validTo":"1984-11-12","current":false,"derived":true,"evidenceMineId":"2301896","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2301896|L07422|1984-05-01|M05906|1984-05-01|135731"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L07423","name":"Parker Sand & Gravel"},"object":{"type":"mine","id":"2301896","name":"SMITH SAND & GRAVEL LLC"},"validFrom":"1984-11-13","validTo":"1999-08-03","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2301896|L07423|1984-11-13|1999-08-03"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M05907","name":"David  Parker"},"object":{"type":"mine","id":"2301896","name":"SMITH SAND & GRAVEL LLC"},"validFrom":"1984-11-13","validTo":"1999-08-03","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2301896|M05907|1984-11-13|1999-08-03"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M05907","name":"David  Parker"},"object":{"type":"operator","id":"L07423","name":"Parker Sand & Gravel"},"validFrom":"1984-11-13","validTo":"1999-08-03","current":false,"derived":true,"evidenceMineId":"2301896","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2301896|L07423|1984-11-13|M05907|1984-11-13|135732"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L17750","name":"Smith Sand & Gravel Llc"},"object":{"type":"mine","id":"2301896","name":"SMITH SAND & GRAVEL LLC"},"validFrom":"1999-08-04","validTo":"2018-05-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2301896|L17750|1999-08-04|2018-05-30"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M13540","name":"Larry E  Smith"},"object":{"type":"mine","id":"2301896","name":"SMITH SAND & GRAVEL LLC"},"validFrom":"1999-08-04","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2301896|M13540|1999-08-04|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M13540","name":"Larry E  Smith"},"object":{"type":"operator","id":"L17750","name":"Smith Sand & Gravel Llc"},"validFrom":"1999-08-04","validTo":"2018-05-30","current":false,"derived":true,"evidenceMineId":"2301896","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2301896|L17750|1999-08-04|M13540|1999-08-04|156477"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0157255","name":"Smith Sand & Gravel Llc"},"object":{"type":"mine","id":"2301896","name":"SMITH SAND & GRAVEL LLC"},"validFrom":"2018-05-31","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2301896|0157255|2018-05-31|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0141045","name":"Daniel  Bruns"},"object":{"type":"mine","id":"2301896","name":"SMITH SAND & GRAVEL LLC"},"validFrom":"2018-05-31","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2301896|0141045|2018-05-31|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0141045","name":"Daniel  Bruns"},"object":{"type":"operator","id":"0157255","name":"Smith Sand & Gravel Llc"},"validFrom":"2018-05-31","validTo":null,"current":true,"derived":true,"evidenceMineId":"2301896","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2301896|0157255|2018-05-31|0141045|2018-05-31|28531"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0141045","name":"Patrick  Wessels"},"object":{"type":"operator","id":"0157255","name":"Smith Sand & Gravel Llc"},"validFrom":"2018-05-31","validTo":null,"current":true,"derived":true,"evidenceMineId":"2301896","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2301896|0157255|2018-05-31|0141045|2018-05-31|28532"}}],"coverage":{"historyRecords":5,"edgeCount":13,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"2301896","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"}}