The Illinois and Indiana are separated by State Line Road, which is a road elsewhere along the border, but it is only represented by a rock-and-gravel dike that passes through the lake. State Line Road ends in foot bridges where water enters from the Indiana side.
The Illinois and Indiana are divided by State Line Road, which is a road along the border in another location, but it is only represented by a small stone-and-gravel dam that passes through the lake. State Line Road ends with foot bridges where water enters from the Indiana side.