The Associated Press

HELENA, Mont. (AP) - A spokesman for U.S. Rep. Denny Rehberg says that state Sen. Greg Barkus was driving the boat that crashed into rocks and hospitalized five, including the congressman.

One of the two Rehberg staffers hurt in the crash, state director Dustin Frost, has a serious but "survivable" head injury.

Rehberg friend and former staff chief Erik Iverson says Rehberg could be released from the hospital as soon as Monday. He says the congressman is recovering from ankle surgery, and has a fracture around his eye.

Iverson says that Rehberg's blood alcohol level was .05, but stressed the congressman was not driving. That would still be below the legal limit of .08 for piloting a boat.

Iverson says he has no information on Barkus' blood alcohol level.