Montana ? A state lawmaker was at the helm of the speedboat that crashed into the rocky Flathead Lake shore — a serious accident that hospitalized five, including U.S. Rep. Denny Rehberg, a family spokesman said Saturday.

Rehberg’s office shed more light on the late Thursday crash, including the severity of the injuries suffered by two staffers on the boat. One, state director Dustin Frost, has a serious but “survivable” head injury and is under the care of a neurosurgeon, said Rehberg friend and former staff chief Erik Iverson.

The Republican congressman was recovering from ankle surgery, and had a fracture around his eye, but could be released as soon as Monday, Iverson said.