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CM and StP Railroad Underpass
U.S. National Register of Historic Places
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Location	County Road G38 over the Soo Railroad line
Nearest city	Washington, Iowa
Coordinates	41°17′36″N 91°43′28″W / 41.29333°N 91.72444°W / 41.29333; -91.72444
Area	less than one acre
Built	1903
Built by	Chicago, Milwaukee and St. Paul Railroad
Architectural style	Riveted Warren deck truss
NRHP reference No.	98000469
Added to NRHP	May 15, 1998

CM and StP Railroad Underpass is a historic structure located southwest of Washington, Iowa, United States. It was listed on the National Register of Historic Places in 1998. The Warren deck truss bridge is a rare example of this type of bridge in Iowa, and the oldest still in existence. Given the relatively flat nature of Iowa's rivers and streams this bridge type was rarely built in the state, and was mostly built for railroad use. This bridge, completed in 1903 by the Chicago, Milwaukee, St. Paul & Pacific Railroad (known as simply The Milwaukee Road), crosses a county highway bridge and the west fork of Crooked Creek.

References

1. "National Register Information System". National Register of Historic Places. National Park Service. July 9, 2010.
2. ^ Deanne L. Zibell. "CM and StP Railroad Underpass" (PDF). National Park Service. Retrieved 2015-12-24.

v t e National Register of Historic Places in Washington County, Iowa
Riverside	St. Mary’s Parish Church Buildings
Washington	H.A. Baxter Coal Company Historic District Blair House Smith Wildman and Jennie (Hearne) Brookhart House CM and StP Railroad Underpass Jonathan Clark Conger House Gracehill Moravian Church and Cemetery Joseph Keck House Kurtz House McCleery Calendar Factory Winfield Smouse House Frank Stewart House Washington County Courthouse Washington Downtown Historic District West Side Residential Historic District Woodlawn Cemetery Gates and Shelter Alexander Young Cabin
Wellman	Thomas Johnson Polygonal Barn Pilotburg Church
See also: National Register of Historic Places listings in Washington County, Iowa and List of National Historic Landmarks in Iowa

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• Bridges completed in 1903
• Railroad bridges on the National Register of Historic Places in Iowa
• Truss bridges in Iowa
• Buildings and structures in Washington County, Iowa
• National Register of Historic Places in Washington County, Iowa
• 1903 establishments in Iowa
• Warren truss bridges in the United States
• Chicago, Milwaukee, St. Paul and Pacific Railroad
• Southeast Iowa Registered Historic Place stubs