Dunlap's Creek Bridge was the first cast iron, metal arch bridge in the United States and was designed and built by Richard Delafield. Richard Delafield ( September 1, 1798 &ndash November 5, 1873) served as superintendent of the United States Military Academy It was constructed 1836-39 on the National Road in Brownsville, Pennsylvania and remains in use today. Year 1836 ( MDCCCXXXVI) was a Leap year starting on Friday (link will display the full calendar of the Gregorian Calendar (or a Leap US 40svg|right|100px|thumb|The National Road is now included as part of U Brownsville is a borough in Fayette County, Pennsylvania, USA 35 miles (56 km south of Pittsburgh along the Monongahela River. It is listed on the National Register of Historic Places and is a National Historic Civil Engineering Landmark. The National Register of Historic Places (NRHP is the United States government's official list of districts sites buildings structures and objects deemed worthy of The following is a partial list of historic civil engineering landmarks as designated by the American Society of Civil Engineers since it began the program in 1964

See also

• List of Registered Historic Places in Fayette County, Pennsylvania

References

External links

• Dunlap’s Creek Bridge: Historical Marker Database
• The First Cast Iron Bridge: Historical Marker Database
• Dunlap's Creek Bridge: History and Heritage of Civil Engineering
• Historic American Buildings Survey/Historic American Engineering Record/Historic American Landscapes Survey

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