wrote:

From Lake Lanier Army Corp of Engineers website:
Constructed by the U.S. Army Corps of Engineers in the 1950's, Lake
Lanier is a multi-purpose lake that provides for flood protection,
power production, water supply, navigation, recreation and fish and
wildlife management.

Same way with Lake Carlyle . that is with exception of power
production.

It is fed by the Kaskaskia river, and it's level has dropped
considerably. it is a huge man made lake and is about 4 mi wide and 10
mi long. But in many places the shore line is rather shallow. in some
cases un aprochable with a typical runabout up to 150 ft from shore.
But when the lake is full, these spots are usually navagational within
50-75 ft.

Still plenty deep in the middle, but unhandy for reaching beach lines.