23 Mile Road–Kalamazoo River Bridge
42.2682 - 84.8476Koordinaten: 42 ° 16 ' 5.5 " N, 84 ° 50' 51.4 " W
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23 Mile Road
The 23 Mile Road Kalamazoo River Bridge is a girder bridge made of concrete with curved top chord in Marengo Township, Michigan, where the 23 Mile Road crosses the Kalamazoo River. The building was built in 1922, listed since 1999 on the National Register of Historic Places.
History
Before the present concrete bridge was built, it was at this point an older bridge that was probably a truss structure of steel. The new bridge was designed by the Michigan State Highway Department in January 1922 and the Calhoun County then built the bridge, which tempered the state later. Mead Brothers in Battle Creek was the staff responsible for the demolition of the previous building and the new building construction companies. The construction costs amounted to 10,353 U.S. dollars.
On 22 December 1999, the bridge on the National Register of Historic Places was included because it is one of the oldest surviving examples of this concept and well received. The 12 Mile Road Kalamazoo River Bridge, also in Calhoun County, was included in the National Register on the same day.
Design
The bridge is calculated in north-south direction and is located approximately south of the located in a rural area settlement Marengo. The bridge is a continuous girder bridge made of concrete with curved top chord; This style was developed by the Michigan State Highway Department at the beginning of the 1920s. The bridge has a single opening, which is stretched about 18.3 m. In the sides of the carrier, which also serve as railings, elliptical depressions with six smaller indentations therein. The pillars each have a square cover and a base, to which the guard rails are mounted by Armco. Below the continuous beam cantilever beams are present at the abutments. At the northwest cornerstone of a sign with the building number is attached.