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
Located in the Portage Park neighborhood of Chicago, this concrete slab bridge crosses West Montrose Avenue near Cicero Avenue.
Built in 1926, the bridge features four concrete slab spans, set onto concrete substructures. The bridge follows a common 1920s design, using minimal decorations.
As one of the last ordered track elevations in Chicago, this bridge and the others in the area feature concrete instead of steel designs seen further south.
Overall, the bridge appears to be in fair condition, with minimal significant deterioration. However, there is a fair amount of spalling on the piers.
The author has ranked this bridge as being minimally significant, due to the common design and large numbers of similar bridges in the area.
The photo above is an overview.