IE stepped in a rut while roof bolting. IE felt pain/warmth after incident. IE was treated at ER and released. IE was treated at OISI on 9/25/18 and released. An MRI was performed on 10/12/18 and revealed a tear of medial meniscus. IE followed up OISO on 10/22/18 at which time a non-weight bearing restriction was applied becoming lost time.