LAKE OZARK -- A high-pressured water cannon blasts layers of old concrete off the outside walls of Bagnell Dam as part of a major upgrade project by Ameren Missouri. New concrete will eventually be poured as replacement.

LAKE OZARK -- A high-pressured water cannon blasts layers of old concrete off the outside walls of Bagnell Dam as part of a major upgrade project by Ameren Missouri. New concrete will eventually be poured as replacement.