EMPORIA, Kan. (AP) — Authorities say a culvert where a 21-year-old Texan died after losing control of his car during flooding on Interstate 35 needs to be enlarged. Zachary Clark, of Keller, Texas, was headed north last week when his vehicle hydroplaned, went off the road and entered an area of rapidly moving floodwater in drainage culvert. Turnpike CEO Steve Hewitt told The Wichita Eagle that the culvert needs to be enlarged. But Hewitt says there's no guarantee future flooding won't overwhelm even an expanded culvert. A KTA statement says once Clark lost control of his car he went into the ditch, and a few minutes later his car floated about 150 feet to the culvert. The statement says after that the force of the water moved the vehicle through the culvert.