{"data":{"schemaVersion":"realm.mine-profile.v1","generatedAt":"2026-10-13T11:26:59.401Z","identity":{"mine_id":"3304147","name":"Columbus Plant","status":"Active","status_date":"1990-03-12","mine_type":"Surface","coal_metal":"M","commodity":"Crushed, Broken Limestone NEC","state":"OH","county":"Franklin","nearest_town":"Columbus","operator_id":"L06208","operator_name":"The Olen Corporation","controller_id":"M04952","controller_name":"Olen Corporation","district":"M2","office":"Hebron OH Field Office","employees":35,"latitude":39.894167,"longitude":-82.995556},"coverage":{"contributingSources":15,"registeredSources":20,"sourceRows":2770},"relationships":{"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":"3304147","name":"Columbus Plant"},"operator":{"type":"operator","id":"L06208","name":"The Olen Corporation"},"controller":{"type":"controller","id":"M04952","name":"Olen Corporation"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M04952","name":"Olen Corporation"},"object":{"type":"mine","id":"3304147","name":"Columbus Plant"},"validFrom":"1983-05-31","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3304147|M04952|1983-05-31|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L06208","name":"The Olen Corporation"},"object":{"type":"mine","id":"3304147","name":"Columbus Plant"},"validFrom":"1988-12-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3304147|L06208|1988-12-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M04952","name":"Olen Corporation"},"object":{"type":"operator","id":"L06208","name":"The Olen Corporation"},"validFrom":"1988-12-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"3304147","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3304147|L06208|1988-12-01|M04952|1983-05-31|133325"}}],"coverage":{"historyRecords":1,"edgeCount":3,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"sources":[{"id":"msha-accidents","name":"Accident, Injuries, and Illnesses","domains":["safety","contractors"],"products":["incident trends","severity rates","equipment patterns","peer denominators"],"rowCount":36,"firstDate":"2000-09-22","lastDate":"2025-02-26","metrics":{"daysLost":649,"injuries":36,"fatalities":0,"recentRows":8,"restrictedDays":194,"contractorRecords":12},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"101207","DOCUMENT_NO":"220250650013","ACCIDENT_DT":"02/26/2025","DEGREE_INJURY":"NO DYS AWY FRM WRK,NO RSTR ACT","CLASSIFICATION":"HANDTOOLS (NONPOWERED)","ACCIDENT_TYPE":"Struck by... 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