{"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":"2901342","name":"Westside Materials"},"operator":{"type":"operator","id":"L09506","name":"Westside Materials"},"controller":{"type":"controller","id":"M07459","name":"Ribble Contracting Inc & Interwest Ltd"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L08714","name":"Ribble Contracting Inc"},"object":{"type":"mine","id":"2901342","name":"Westside Materials"},"validFrom":"1950-01-01","validTo":"1987-01-20","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2901342|L08714|1950-01-01|1987-01-20"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M06901","name":"Norman C  Ribble"},"object":{"type":"mine","id":"2901342","name":"Westside Materials"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2901342|M06901|1950-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M06901","name":"Norman C  Ribble"},"object":{"type":"operator","id":"L08714","name":"Ribble Contracting Inc"},"validFrom":"1950-01-01","validTo":"1987-01-20","current":false,"derived":true,"evidenceMineId":"2901342","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2901342|L08714|1950-01-01|M06901|1950-01-01|139600"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L09506","name":"Westside Materials"},"object":{"type":"mine","id":"2901342","name":"Westside Materials"},"validFrom":"1987-01-21","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2901342|L09506|1987-01-21|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M07459","name":"Ribble Contracting Inc & Interwest Ltd"},"object":{"type":"mine","id":"2901342","name":"Westside Materials"},"validFrom":"1987-01-21","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2901342|M07459|1987-01-21|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M07459","name":"Ribble Contracting Inc & Interwest Ltd"},"object":{"type":"operator","id":"L09506","name":"Westside Materials"},"validFrom":"1987-01-21","validTo":null,"current":true,"derived":true,"evidenceMineId":"2901342","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2901342|L09506|1987-01-21|M07459|1987-01-21|141316"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"2901342","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"}}