{"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":"4702621","name":"Penninsula Pit"},"operator":{"type":"operator","id":"L04405","name":"Sawyer County Highway Department"},"controller":{"type":"controller","id":"M03549","name":"Sawyer County-Wi"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L03377","name":"Raymond Madson Excavating"},"object":{"type":"mine","id":"4702621","name":"Penninsula Pit"},"validFrom":"1979-01-01","validTo":"1980-04-09","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4702621|L03377|1979-01-01|1980-04-09"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M02700","name":"Madson Raymond"},"object":{"type":"mine","id":"4702621","name":"Penninsula Pit"},"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":"4702621|M02700|1979-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M02700","name":"Madson Raymond"},"object":{"type":"operator","id":"L03377","name":"Raymond Madson Excavating"},"validFrom":"1979-01-01","validTo":"1980-04-09","current":false,"derived":true,"evidenceMineId":"4702621","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4702621|L03377|1979-01-01|M02700|1979-01-01|126649"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M03549","name":"Sawyer County-Wi"},"object":{"type":"mine","id":"4702621","name":"Penninsula Pit"},"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":"4702621|M03549|1979-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L04405","name":"Sawyer County Highway Department"},"object":{"type":"mine","id":"4702621","name":"Penninsula Pit"},"validFrom":"1980-04-10","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4702621|L04405|1980-04-10|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M03549","name":"Sawyer County-Wi"},"object":{"type":"operator","id":"L04405","name":"Sawyer County Highway Department"},"validFrom":"1980-04-10","validTo":null,"current":true,"derived":true,"evidenceMineId":"4702621","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4702621|L04405|1980-04-10|M03549|1979-01-01|129326"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4702621","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"}}