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County Bridge No. 171

County Bridge No. 171 is a historic stone arch bridge located in Tredyffrin Township, Chester County, Pennsylvania. It spans Valley Creek. It has three spans; the main span is 25 feet long and flanked by two 15-feet long spans. The bridge was constructed in 1907, of coursed rubble with brick arch rings and a contrasting parapet.[2]

It was listed on the National Register of Historic Places in 1988.[1]

References

  1. ^ a b "National Register Information System". National Register of Historic Places. National Park Service. July 9, 2010.
  2. ^ "National Historic Landmarks & National Register of Historic Places in Pennsylvania". ARCH: Pennsylvania's Historic Architecture & Archaeology. Archived from the original (Searchable database) on October 28, 2012. Retrieved November 2, 2012. Note: This includes District 6-0 (November 1982). "Pennsylvania Historic Resource Survey Form: County Bridge No. 171" (PDF). Retrieved October 8, 2012.{{cite web}}: CS1 maint: numeric names: authors list (link)