{"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":"0405950","name":"VALLEY SALT"},"operator":{"type":"operator","id":"L17526","name":"WEST COAST AGGREGATE SUPPLY INC."},"controller":{"type":"controller","id":"0197580","name":"John R  Struiksma"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M13373","name":"Marvin J  Struiksma et al"},"object":{"type":"mine","id":"0405950","name":"VALLEY SALT"},"validFrom":"2000-06-19","validTo":"2026-01-26","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0405950|M13373|2000-06-19|2026-01-26"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0173354","name":"Valley Salt LLC"},"object":{"type":"mine","id":"0405950","name":"VALLEY SALT"},"validFrom":"2020-10-15","validTo":"2022-08-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0405950|0173354|2020-10-15|2022-08-31"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0158223","name":"Gary A Pedersen et al"},"object":{"type":"mine","id":"0405950","name":"VALLEY SALT"},"validFrom":"2020-10-15","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0405950|0158223|2020-10-15|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0158223","name":"Gary A Pedersen et al"},"object":{"type":"operator","id":"0173354","name":"Valley Salt LLC"},"validFrom":"2020-10-15","validTo":"2022-08-31","current":false,"derived":true,"evidenceMineId":"0405950","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0405950|0173354|2020-10-15|0158223|2020-10-15|32752"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0158223","name":"Jerry  Coleman"},"object":{"type":"operator","id":"0173354","name":"Valley Salt LLC"},"validFrom":"2020-10-15","validTo":"2022-08-31","current":false,"derived":true,"evidenceMineId":"0405950","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0405950|0173354|2020-10-15|0158223|2020-10-15|32753"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0158223","name":"Terry  Walker et al"},"object":{"type":"operator","id":"0173354","name":"Valley Salt LLC"},"validFrom":"2020-10-15","validTo":"2022-08-31","current":false,"derived":true,"evidenceMineId":"0405950","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0405950|0173354|2020-10-15|0158223|2020-10-15|32754"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L17526","name":"West Coast Aggregate Supply Inc."},"object":{"type":"mine","id":"0405950","name":"VALLEY SALT"},"validFrom":"2022-09-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0405950|L17526|2022-09-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M13373","name":"Marvin J  Struiksma et al"},"object":{"type":"operator","id":"L17526","name":"West Coast Aggregate Supply Inc."},"validFrom":"2022-09-01","validTo":"2026-01-26","current":false,"derived":true,"evidenceMineId":"0405950","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0405950|L17526|2022-09-01|M13373|2000-06-19|156151"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0197580","name":"John R  Struiksma et al"},"object":{"type":"mine","id":"0405950","name":"VALLEY SALT"},"validFrom":"2026-01-27","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0405950|0197580|2026-01-27|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0197580","name":"John R  Struiksma et al"},"object":{"type":"operator","id":"L17526","name":"West Coast Aggregate Supply Inc."},"validFrom":"2026-01-27","validTo":null,"current":true,"derived":true,"evidenceMineId":"0405950","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0405950|L17526|2022-09-01|0197580|2026-01-27|42134"}}],"coverage":{"historyRecords":5,"edgeCount":10,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"0405950","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"}}