{"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":"4201603","name":"GLEN CANYON PIT"},"operator":{"type":"operator","id":"L17928","name":"Americo Rock & Sand"},"controller":{"type":"controller","id":"M13678","name":"Larry  Stubbs"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L07086","name":"General Rock & Sand"},"object":{"type":"mine","id":"4201603","name":"GLEN CANYON PIT"},"validFrom":"1979-01-01","validTo":"2000-10-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4201603|L07086|1979-01-01|2000-10-31"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M05642","name":"Merril  Jessop"},"object":{"type":"mine","id":"4201603","name":"GLEN CANYON PIT"},"validFrom":"1979-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4201603|M05642|1979-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M05642","name":"Merril  Jessop"},"object":{"type":"operator","id":"L07086","name":"General Rock & Sand"},"validFrom":"1979-01-01","validTo":"2000-10-31","current":false,"derived":true,"evidenceMineId":"4201603","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4201603|L07086|1979-01-01|M05642|1979-01-01|135027"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L17928","name":"Americo Rock & Sand"},"object":{"type":"mine","id":"4201603","name":"GLEN CANYON PIT"},"validFrom":"2000-11-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4201603|L17928|2000-11-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M13678","name":"Larry  Stubbs"},"object":{"type":"mine","id":"4201603","name":"GLEN CANYON PIT"},"validFrom":"2000-11-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4201603|M13678|2000-11-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M13678","name":"Larry  Stubbs"},"object":{"type":"operator","id":"L17928","name":"Americo Rock & Sand"},"validFrom":"2000-11-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"4201603","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4201603|L17928|2000-11-01|M13678|2000-11-01|156826"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4201603","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"}}