{"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":"2901119","name":"Tecolote Pit"},"operator":{"type":"operator","id":"0174673","name":"Howard's Sand & Gravel"},"controller":{"type":"controller","id":"0159701","name":"Eric  Knezevich"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L34385","name":"Howard's Sand & Gravel"},"object":{"type":"mine","id":"2901119","name":"Tecolote Pit"},"validFrom":"1988-02-01","validTo":"2021-01-03","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2901119|L34385|1988-02-01|2021-01-03"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M34385","name":"Dorothy  Knezevich"},"object":{"type":"mine","id":"2901119","name":"Tecolote Pit"},"validFrom":"1988-02-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2901119|M34385|1988-02-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M34385","name":"Dorothy  Knezevich"},"object":{"type":"operator","id":"L34385","name":"Howard's Sand & Gravel"},"validFrom":"1988-02-01","validTo":"2021-01-03","current":false,"derived":true,"evidenceMineId":"2901119","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2901119|L34385|1988-02-01|M34385|1988-02-01|163144"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0174673","name":"Howard's Sand & Gravel"},"object":{"type":"mine","id":"2901119","name":"Tecolote Pit"},"validFrom":"2021-01-04","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2901119|0174673|2021-01-04|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0159701","name":"Eric  Knezevich"},"object":{"type":"mine","id":"2901119","name":"Tecolote Pit"},"validFrom":"2021-01-04","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2901119|0159701|2021-01-04|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0159701","name":"Eric  Knezevich"},"object":{"type":"operator","id":"0174673","name":"Howard's Sand & Gravel"},"validFrom":"2021-01-04","validTo":null,"current":true,"derived":true,"evidenceMineId":"2901119","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2901119|0174673|2021-01-04|0159701|2021-01-04|33179"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"2901119","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"}}