UP MO-13 Bridge

Steel Stringer Bridge over Missouri Highway 13
Polo, Caldwell County, Missouri

Click the Photo Above to See All Photos of This Bridge!
Name UP MO-13 Bridge
Built By Chicago, Milwaukee & St. Paul Railway
Contractor Unknown
Currently Owned By Union Pacific Railroad
Currently Owned By Canadian Pacific Railway
Length 39 Feet Total
Width 2 Tracks
Height Above Ground 13 Feet 8 Inches
Superstructure Type I-Beam
Substructure Type Concrete
Date Built 1930
Traffic Count 25 Trains/Day (Estimated)
Current Status In Use
UP Bridge Number 460.60
Significance Local Significance
Documentation Date February 2017
In 1882, the Chicago, Milwaukee & St. Paul Railway began building a line from Savanna, Illinois to Kansas City.

The line in Iowa was completed at a majority by 1885. The route crossed the Mississippi River from Savanna to Sabula, Iowa on a large swing bridge between the two towns.

The line quickly turned south, paralleled the Mississippi River through Clinton, Davenport and Muscatine. Then the line turned southwest, crossing the Cedar and Iowa rivers near Conesville before arriving in Washington, where it crossed a Rock Island line towards Des Moines.

From here, it continued southwest, crossing the Skunk River before arriving in Ottumwa, where it would cross the Des Moines River, and a pair of rail lines.
Continuing on the same southwest trajectory, the line would cross a Rock Island line near Moravia. The line became increasingly hilly and curvy as it approached the Missouri border near Sewal.
By 1887, the Milwaukee Road reached Kansas City; crossing through Missouri and towns such as Chillicothe.

The CM&StP became the Chicago, Milwaukee St. Paul & Pacific in 1912 with newly completed Pacific Extension. By 1931, the Rock Island Railroad requested trackage rights along this line between Polo and Lawson, Missouri; as well as from Mosby to Kansas City.

The 1887 Choteau Bridge over the Missouri River was replaced in 1945 by the present Harry S. Truman Bridge.

The line was considered a mainline, connecting to Kansas City to Davenport and Chicago. Few changes were ever seen on the line, although the major one was in 1981. The Milwaukee Road purchased the former Rock Island alignment between Muscatine and Washington and scrapped their own. The Rock Island had fallen the year before.

In 1985, the Milwaukee Road was purchased by Soo Line, who operated the line until 1997 when they sold it to I&M Rail Link. The line then changed hands again in 2002 when Iowa, Chicago & Eastern purchased it, and IC&E was purchased by Canadian Pacific along with Dakota, Minnesota & Eastern in 2008.
Canadian Pacific currently operates this line, although they have continued to explore potential buyers. The line still connects Chicago to Kansas City.

View an article regarding the construction of this route.

This small and insignificant I-Beam bridge was built in 1930 as part of a line relocation near Polo.
The simple I-Beam bridge sits on concrete substructures. It is a double track, serving both the Union Pacific Trenton Subdivision and the Canadian Pacific Kansas City line.
Containing little notable features, the bridge appears to be in fair condition.

The author has ranked the bridge as being locally significant, due to the common design.
The photo above is an overview.


Source Type


Build Date Stamp
Railroad Line History Source ICC Valuation Information, Compiled by Richard S. Steele

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