A Nashville man has apparently gone missing during a solo kayak outing on Center Hill Lake Sunday afternoon.A search for 55-year-old William Clotharp, a cardiothoracic surgeon at St. Thomas Hospital in Nashville, is being conducted in the Hurricane bridge area.Officials say that the doctor’s overturned kayak was found floating on the lake, but no sign of the missing man has yet been discovered.The kayak was reportedly located in the main river channel near the Hurricane Recreation Area, where the water reaches depths of approximately 140 feet.“We are doing the best we can, but it’s a lot of area to cover,” Dustin Johnson of the DeKalb County Rescue Squad told the Review.Authorities say that Clotharp's wife called local dispatch at just before 1:30 Monday morning to report that she had last heard from her husband at around 6 p.m. on Sunday, and was worried for his safety.TWRA officers, members of the DeKalb County Rescue Squad and Corps of Engineers officials are still searching the area as the Review goes to press.