{"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":"3500874","name":"Morris Quarry & Plant"},"operator":{"type":"operator","id":"L00397","name":"Bob Angell Inc"},"controller":{"type":"controller","id":"M00331","name":"Angell Bob"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00331","name":"Angell Bob"},"object":{"type":"mine","id":"3500874","name":"Morris Quarry & Plant"},"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":"3500874|M00331|1950-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L02065","name":"Coos County Highway Department"},"object":{"type":"mine","id":"3500874","name":"Morris Quarry & Plant"},"validFrom":"1950-01-01","validTo":"1978-12-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3500874|L02065|1950-01-01|1978-12-31"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M01849","name":"Coos County-OR"},"object":{"type":"mine","id":"3500874","name":"Morris Quarry & Plant"},"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":"3500874|M01849|1950-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M01849","name":"Coos County-OR"},"object":{"type":"operator","id":"L02065","name":"Coos County Highway Department"},"validFrom":"1950-01-01","validTo":"1978-12-31","current":false,"derived":true,"evidenceMineId":"3500874","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3500874|L02065|1950-01-01|M01849|1950-01-01|121637"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00397","name":"Bob Angell Inc"},"object":{"type":"mine","id":"3500874","name":"Morris Quarry & Plant"},"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":"3500874|L00397|1979-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00331","name":"Angell Bob"},"object":{"type":"operator","id":"L00397","name":"Bob Angell Inc"},"validFrom":"1979-01-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"3500874","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3500874|L00397|1979-01-01|M00331|1950-01-01|109484"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3500874","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"}}