The CM&O was primarely purchased by the Chicago & Northwestern Railway in 1882, although the CM&O name stuck for quite a while.
Starting in 1899, this line was heavily rebuilt south of Shakopee. It opened officially in 1902.
The C&NW continued to operate this as a mainline until 1995, when they were purchased by Union Pacific Railroad.
Union Pacific still operates this as a mainline called the Mankato Subdivision
This large stone arch is hard to access. Its very large, and there are steep grades going down to it.
I accessed it by permission from a local landowner.
The bridge itself is in good condition, although scouring is a problem on the south wall.
The photo above is an overview.