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 separated by State Line Road, which is a road that spans the border between the two states, but it's only accessible through a small dam that crosses the lake. The road ends with bridges that allow water to flow from the Indiana side into the lake.