Two people were thrown off their tube this past weekend when a rope broke as they were being pulled on the Mississippi River near Clinton.  One suffered injuries when he hit some rocks. Iowa Department of Natural Resources spokesman, Kevin Baskins, says they are still investigating to determine if excessive speed or some other factors were involved. Baskins says it has been a busy boating season, and relatively safe.

Baskins says one big key to preventing deaths in accidents on the water is something they talked about all the time.

Baskins says boaters also need to stay sober when they are driving the boat.