staved rock dam on the illinois river

across america american and army attraction background central concrete control controlling corp dam day daytime destination engineering engineers exterior flood flooding flow flowing gravity hold holding holiday icon illinois images infrastructure kirkikis landmark landscape lock marvel midwest midwestern north outdoors outside park photographs photography photos pics pictures pix reinforced river rock scenery scenic sightseeing six span spanning spillway starved state states sun sunny sunshine tourism tourist travel traveling united usa utica vacation water waterway winter wintertime