{"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":"2103109","name":"OTTERTAIL PORTABLE CRUSHER"},"operator":{"type":"operator","id":"L16807","name":"Camas Minndak Inc"},"controller":{"type":"controller","id":"M07336","name":"Aggregate Industries PLC"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L14277","name":"Ahlfs Construction"},"object":{"type":"mine","id":"2103109","name":"OTTERTAIL PORTABLE CRUSHER"},"validFrom":"1995-08-01","validTo":"1998-08-17","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2103109|L14277|1995-08-01|1998-08-17"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M36970","name":"James E  Ahlfs"},"object":{"type":"mine","id":"2103109","name":"OTTERTAIL PORTABLE CRUSHER"},"validFrom":"1995-08-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2103109|M36970|1995-08-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M36970","name":"James E  Ahlfs"},"object":{"type":"operator","id":"L14277","name":"Ahlfs Construction"},"validFrom":"1995-08-01","validTo":"1998-08-17","current":false,"derived":true,"evidenceMineId":"2103109","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2103109|L14277|1995-08-01|M36970|1995-08-01|166161"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M07336","name":"Aggregate Industries PLC"},"object":{"type":"mine","id":"2103109","name":"OTTERTAIL PORTABLE CRUSHER"},"validFrom":"1997-05-14","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2103109|M07336|1997-05-14|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L16807","name":"Camas Minndak Inc"},"object":{"type":"mine","id":"2103109","name":"OTTERTAIL PORTABLE CRUSHER"},"validFrom":"1998-08-18","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2103109|L16807|1998-08-18|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M07336","name":"Aggregate Industries PLC"},"object":{"type":"operator","id":"L16807","name":"Camas Minndak Inc"},"validFrom":"1998-08-18","validTo":null,"current":true,"derived":true,"evidenceMineId":"2103109","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2103109|L16807|1998-08-18|M07336|1997-05-14|140902"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"2103109","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"}}