{"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":"2026-10-17T05:35:58.500035+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":"3502525","name":"ONTARIO PIT & PLANT"},"operator":{"type":"operator","id":"L14785","name":"Clearwater Concrete Inc"},"controller":{"type":"controller","id":"M01163","name":"Jeanne M  (Seubert) McDonough"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L05982","name":"Ontario Asphalt Paving Company"},"object":{"type":"mine","id":"3502525","name":"ONTARIO PIT & PLANT"},"validFrom":"1950-01-01","validTo":"1983-07-28","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3502525|L05982|1950-01-01|1983-07-28"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M01161","name":"J C Compton Company"},"object":{"type":"mine","id":"3502525","name":"ONTARIO PIT & PLANT"},"validFrom":"1950-01-01","validTo":"1983-07-28","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3502525|M01161|1950-01-01|1983-07-28"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M01161","name":"J C Compton Company"},"object":{"type":"operator","id":"L05982","name":"Ontario Asphalt Paving Company"},"validFrom":"1950-01-01","validTo":"1983-07-28","current":false,"derived":true,"evidenceMineId":"3502525","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3502525|L05982|1950-01-01|M01161|1950-01-01|117153"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L06616","name":"Ontario Asphalt & Concrete Inc"},"object":{"type":"mine","id":"3502525","name":"ONTARIO PIT & PLANT"},"validFrom":"1983-07-29","validTo":"1996-05-29","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3502525|L06616|1983-07-29|1996-05-29"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M05270","name":"Merle  Maine"},"object":{"type":"mine","id":"3502525","name":"ONTARIO PIT & PLANT"},"validFrom":"1983-07-29","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3502525|M05270|1983-07-29|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M05270","name":"Merle  Maine"},"object":{"type":"operator","id":"L06616","name":"Ontario Asphalt & Concrete Inc"},"validFrom":"1983-07-29","validTo":"1996-05-29","current":false,"derived":true,"evidenceMineId":"3502525","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3502525|L06616|1983-07-29|M05270|1983-07-29|134088"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L14785","name":"Clearwater Concrete Inc"},"object":{"type":"mine","id":"3502525","name":"ONTARIO PIT & PLANT"},"validFrom":"1996-05-30","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3502525|L14785|1996-05-30|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M01163","name":"Jeanne M  (Seubert) McDonough et al"},"object":{"type":"mine","id":"3502525","name":"ONTARIO PIT & PLANT"},"validFrom":"1996-05-30","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3502525|M01163|1996-05-30|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M01163","name":"Jeanne M  (Seubert) McDonough et al"},"object":{"type":"operator","id":"L14785","name":"Clearwater Concrete Inc"},"validFrom":"1996-05-30","validTo":null,"current":true,"derived":true,"evidenceMineId":"3502525","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3502525|L14785|1996-05-30|M01163|1996-05-30|117194"}}],"coverage":{"historyRecords":3,"edgeCount":9,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3502525","dataSource":"postgres","snapshotId":"2026-10-17T05:35:58.500035+00:00","completedAt":"2026-10-17T06:17:15.228Z","sourceCount":20,"totalRows":15450873,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}