{"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":"1001834","name":"Siddoway Pit"},"operator":{"type":"operator","id":"L18292","name":"Mountain West Products LLC"},"controller":{"type":"controller","id":"M34965","name":"Ernest W Johnson; Robert E  Johnson"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00089","name":"Hecla Mining Company"},"object":{"type":"mine","id":"1001834","name":"Siddoway Pit"},"validFrom":"1987-06-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1001834|M00089|1987-06-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M08050","name":"Gerald  Taylor et al"},"object":{"type":"mine","id":"1001834","name":"Siddoway 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":"1001834|M08050|1988-02-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L10324","name":"Mountain West Bark Products Inc"},"object":{"type":"mine","id":"1001834","name":"Siddoway Pit"},"validFrom":"1988-07-01","validTo":"1993-11-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1001834|L10324|1988-07-01|1993-11-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M08050","name":"Gerald  Taylor et al"},"object":{"type":"operator","id":"L10324","name":"Mountain West Bark Products Inc"},"validFrom":"1988-07-01","validTo":"1993-11-30","current":false,"derived":true,"evidenceMineId":"1001834","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1001834|L10324|1988-07-01|M08050|1988-02-01|142615"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M08050","name":"Frank  Daniels et al"},"object":{"type":"operator","id":"L10324","name":"Mountain West Bark Products Inc"},"validFrom":"1988-07-01","validTo":"1993-11-30","current":false,"derived":true,"evidenceMineId":"1001834","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1001834|L10324|1988-07-01|M08050|1988-02-01|142616"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L15415","name":"Mwca Inc"},"object":{"type":"mine","id":"1001834","name":"Siddoway Pit"},"validFrom":"1993-12-01","validTo":"2000-03-14","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1001834|L15415|1993-12-01|2000-03-14"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00089","name":"Hecla Mining Company"},"object":{"type":"operator","id":"L15415","name":"Mwca Inc"},"validFrom":"1993-12-01","validTo":"2000-03-14","current":false,"derived":true,"evidenceMineId":"1001834","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1001834|L15415|1993-12-01|M00089|1987-06-01|104004"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L18292","name":"Mountain West Products LLC"},"object":{"type":"mine","id":"1001834","name":"Siddoway Pit"},"validFrom":"2000-03-15","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1001834|L18292|2000-03-15|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M34965","name":"Robert E  Johnson et al"},"object":{"type":"mine","id":"1001834","name":"Siddoway Pit"},"validFrom":"2000-03-15","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1001834|M34965|2000-03-15|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M34965","name":"Robert E  Johnson et al"},"object":{"type":"operator","id":"L18292","name":"Mountain West Products LLC"},"validFrom":"2000-03-15","validTo":null,"current":true,"derived":true,"evidenceMineId":"1001834","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1001834|L18292|2000-03-15|M34965|2000-03-15|163821"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M34965","name":"Ernest W Johnson et al"},"object":{"type":"operator","id":"L18292","name":"Mountain West Products LLC"},"validFrom":"2000-03-15","validTo":null,"current":true,"derived":true,"evidenceMineId":"1001834","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1001834|L18292|2000-03-15|M34965|2000-03-15|163822"}}],"coverage":{"historyRecords":5,"edgeCount":11,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1001834","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"}}