The line became part of the Chicago, Milwaukee & Saint Paul by 1874, which was vastly expanding its empire across the midwest. It had already reached into Iowa and Minnesota, along with extensive networks in Wisconsin and Illinois.
The line was double tracked in the late 1880s and early 1890s, and was part of the Milwaukee to Saint Paul mainline.
The CMStP reorganized into the Chicago, Milwaukee Saint Paul & Pacific in 1912, as it began expanding its empire towards Seattle.
This line saw some of the most stable traffic of the Milwaukee Road, which generated trains day and night.
When the Milwaukee Road fell out of buisness in 1985, it became part of the Soo Line, who eventually dissolved its Wisconsin lines. Most of the Soo Line went to Canadian Pacific, including this line. Canadian Pacific later sold lines off to Wisconsin Central. This line was not included.
Canadian Pacific is the current operator of this line, which sees nearly 110 trains per day, and is the main route from Chicago to Saint Paul with the Amtrack. It is known as the C&M Subdivision.
06/26/21
This bridge is a rather mundane structure over Bay Street, on the Canadian Pacific mainline.
This bridge is a simple modern 75 foot through girder, on concrete abutments with nearly zero decoration features.
The spur that serves as the Union Pacific connection comes into this bridge onto a seperate span, sharing the same substructures.
It was built in 1980, and the photo above is an overview. The author has ranked it as having no significance, due to the modern age.