Where is this marker?

Loopers will know the marker at Mile 61.0 on the Illinois River as the western most point on the great loop route. Every boat on the loop will travel past this mark in their journey.

Caption this photo. I wonder what this Squadron of Pelicans (Googled it) are thinking as we pass by.

Also we passed over our first Wicket Dam today. Wicket dams are movable dams which can be lowered when water levels (also called pool levels) around a lock are equal.