Lake Shelbyville Dam, Shelbyville, Illinois - KAP 2008-36
Lake Shelbyville Dam was created for flood damage reduction. It was built over the 1963 to 1970 time period. Ironically at the time I was there a large area of the area above the dam (at the top left of the first picture) was almost completely submerged and roped off. Presumably the dam helped to mitigate damage downstream. The reservoir offers recreational opportunities such as swimming, boating and fishing.
These photos were taken from a camera rig suspended below a kite (Kite Aerial Photography - KAP).