Ok, the Rock river does not lie just east of Rochelle. But the river is a main waterway of northern Illinois and this section of the layout between Rochelle and Wheaton is a great spot for a river. So, today I cut out the temporary wood span, added the plywood river bottom and installed the bridges to span the river. The toughest part was getting the river bottom at just the right elevation so the tracks crossed the bridge spans on the level.
Tracks moved out of the way, temporary roadbed removed and plywood riverbed added.
Bridges added with tracks reinstalled. For now, I just reused the tracks that were on the temporary roadbed. Eventually I will be using bridge track for the spans.