{"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":"0202819","name":"Trommel Portable Plant"},"operator":{"type":"operator","id":"0154793","name":"Western Nevada Materials"},"controller":{"type":"controller","id":"M01688","name":"Teichert Inc"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L16459","name":"Old Pueblo Adobe"},"object":{"type":"mine","id":"0202819","name":"Trommel Portable Plant"},"validFrom":"1999-05-01","validTo":"2017-12-19","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0202819|L16459|1999-05-01|2017-12-19"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M12592","name":"Tobert E Barnes et al"},"object":{"type":"mine","id":"0202819","name":"Trommel Portable Plant"},"validFrom":"1999-05-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0202819|M12592|1999-05-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M12592","name":"Tobert E Barnes et al"},"object":{"type":"operator","id":"L16459","name":"Old Pueblo Adobe"},"validFrom":"1999-05-01","validTo":"2017-12-19","current":false,"derived":true,"evidenceMineId":"0202819","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0202819|L16459|1999-05-01|M12592|1999-05-01|154092"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0154793","name":"Western Nevada Materials"},"object":{"type":"mine","id":"0202819","name":"Trommel Portable Plant"},"validFrom":"2017-12-20","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0202819|0154793|2017-12-20|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M01688","name":"Teichert Inc"},"object":{"type":"mine","id":"0202819","name":"Trommel Portable Plant"},"validFrom":"2017-12-20","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0202819|M01688|2017-12-20|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M01688","name":"Teichert Inc"},"object":{"type":"operator","id":"0154793","name":"Western Nevada Materials"},"validFrom":"2017-12-20","validTo":null,"current":true,"derived":true,"evidenceMineId":"0202819","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0202819|0154793|2017-12-20|M01688|2017-12-20|120308"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"0202819","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"}}