A 20-year-old from Iowa seriously hurt in a boating collision back in late May at Lake of the Ozarks has died from his injuries. The highway patrol says Alec Potthoff, of Van Meter, was pronounced dead, Tuesday, in Des Moines. Potthoff was one of four people injured in the collision at the .3 mile mark of the main channel during the late evening hours of May 26th. In that accident, the two boats had been traveling opposite directions when one turned to the left trying to avoid the collision and the other turned to the right before striking each other. Three other occupants in the two boats escaped with minor injuries.