Authorities are investigating after human remains were recovered from the Columbia River near Rock Island Dam. The Chelan County Sheriff's Office said deputies responded around 7:40 p.m. July 20 after receiving a report of human remains in the river. Detectives and personnel from the Chelan County Coroner's Office responded by boat and recovered the remains. Get our free mobile appThe coroner's office is working to identify the deceased. Anyone with information that could assist the investigation is asked to contact the Chelan County Sheriff's Office.