{"data":{"schemaVersion":"realm.mine-profile.v1","generatedAt":"2026-10-13T11:26:59.401Z","identity":{"mine_id":"3304657","name":"Columbus Limestone","status":"Active","status_date":"2011-10-03","mine_type":"Surface","coal_metal":"M","commodity":"Crushed, Broken Limestone NEC","state":"OH","county":"Franklin","nearest_town":"Columbus","operator_id":"L17597","operator_name":"Shelly Materials Inc","controller_id":"M06183","controller_name":"CRH PLC","district":"M2","office":"Hebron OH Field Office","employees":60,"latitude":39.895833,"longitude":-83.021389},"coverage":{"contributingSources":16,"registeredSources":20,"sourceRows":5439},"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":"3304657","name":"Columbus Limestone"},"operator":{"type":"operator","id":"L17597","name":"Shelly Materials Inc"},"controller":{"type":"controller","id":"M06183","name":"CRH PLC"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M06183","name":"CRH PLC"},"object":{"type":"mine","id":"3304657","name":"Columbus Limestone"},"validFrom":"2000-03-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3304657|M06183|2000-03-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L17597","name":"Shelly Materials Inc"},"object":{"type":"mine","id":"3304657","name":"Columbus Limestone"},"validFrom":"2010-09-30","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3304657|L17597|2010-09-30|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M06183","name":"CRH PLC"},"object":{"type":"operator","id":"L17597","name":"Shelly Materials Inc"},"validFrom":"2010-09-30","validTo":null,"current":true,"derived":true,"evidenceMineId":"3304657","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3304657|L17597|2010-09-30|M06183|2000-03-01|136838"}}],"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":24,"firstDate":"2011-12-13","lastDate":"2026-07-20","metrics":{"daysLost":466,"injuries":21,"fatalities":0,"recentRows":10,"restrictedDays":465,"contractorRecords":5},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"105410","DOCUMENT_NO":"220262150010","ACCIDENT_DT":"07/20/2026","DEGREE_INJURY":"NO DYS AWY FRM WRK,NO RSTR ACT","CLASSIFICATION":"MACHINERY","ACCIDENT_TYPE":"Struck by flying object","OCCUPATION":"Maintenance man, Mechanic,  Repair/Serviceman, Boilermaker, Fueler, Tire tech, Field service tech","NO_INJURIES":"1","DAYS_LOST":"0","NARRATIVE":"EE was grinding a piece of steel and metal entered EEs left eye. 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