| 词条 | US-12–Coldwater River Bridge |
| 释义 |
| name = US-12–Coldwater River Bridge | nrhp_type = | image = US12-Coldwater Bridge.jpg | caption = | location= Old US 12 over Coldwater Bridge, Coldwater, Michigan | coordinates={{coord|41|56|44|N|85|1|52|W|display=inline,title}} | locmapin = Michigan#USA | built = {{Start date|1920}} | architect = Michigan State Highway Department | builder = Brookville Bridge Company | demolished = 2018 | architecture = Pratt pony truss | added = December 22, 1999 | area = less than one acre | mpsub = Highway Bridges of Michigan MPS | refnum = 99001609[1] }} The US-12–Coldwater River Bridge was a road bridge carrying Old US-12 over the Coldwater River in Coldwater, Michigan. It was listed on the National Register of Historic Places in 1999.[1] HistoryThe US-12–Coldwater River Bridge was constructed in 1920 by the Brookville Bridge Company for the Michigan State Highway Department at a cost of about $12,000. The bridge was constructed as a trunk line bridge on what was then US-112 (and now has been re-designated US-12).[2] In 1933, the roadway was straightened, eliminating a sharp turn at the end of the bridge, and the state constructed a new bridge nearby. Responsibility for this bridge was then turned over to the city of Coldwater.[3] The bridge was closed to automobile traffic in the late 1990s due to severe rust deterioration, but was open to pedestrian traffic until it was deemed unsafe and condemned on August 25, 2017.[2] The bridge was demolished in April 2018, and will eventually be replaced with a pedestrian bridge.[4] DescriptionThe bridge is a five-panel steel Pratt pony truss bridge with a 64-foot span. The superstructure is constructed of back-to-back angles and back-to-back channels, with I-beams riveted to the bottom to support the decking. The deck is concrete and 21 feet wide. A sidewalk with railings is cantilevered off one side. The substructure consists of fieldstone abutments and wing walls capped with concrete.[3] References1. ^1 {{NRISref|version=2010a}} {{National Register of Historic Places}}{{DEFAULTSORT:US-12-Coldwater River Bridge}}2. ^1 {{cite web | title = Old US-12 Bridge | publisher = Historic Bridges | url = http://historicbridges.org/bridges/browser/?bridgebrowser=truss/us12/ | accessdate = September 5, 2017}} 3. ^1 {{citation | title = NATIONAL REGISTER OF HISTORIC PLACES REGISTRATION FORM: US-12/Coldwater River Bridge | author1 = Chad J. Perkins | author2 = Charlene K. Raise | date = January 1998 | url = https://catalog.archives.gov/id/25337706}} (note: large pdf file) 4. ^{{cite news | title = Demolition of bridge set to begin Monday | date = April 16, 2018 | author = Ken Delaney | newspaper = WTVB | url = http://wtvbam.com/news/articles/2018/apr/16/demolition-of-bridge-set-to-begin-monday/}} 2 : National Register of Historic Places in Branch County, Michigan|Infrastructure completed in 1920 |
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