McConnell's Mill Bridge, Spanning Slippery Rock Creek at McConnell's Mill Road (Township Route 415), Ellwood City, Lawrence County, PA

Significance: One of 4 extant Howe-truss covered bridges in Pennsylvania. It is the longest of these that has not been completely rebuilt. Erected originally to transport cargo from a grist mill, the bridge still carries vehicular traffic through what became McConnell's Mill State Park in 1957. In the late 1950s, a steel support structure was added to the deck and an asphalt covering was tacked onto the roof...

Unprocessed Field note material exists for this structure: N436

Survey number: HAER PA-458

Building/structure dates: 1875 Initial Construction

Building/structure dates: after. 1957- before. 1960 Subsequent Work

National Register of Historic Places NRIS Number: 80003544

covered bridges bridge construction transportation strengthening vehicular bridges howe trusses ellwood city mcconnell mill bridge mill bridge slippery slippery rock creek mill road township route ellwood lawrence lawrence county pennsylvania bell and breckenridge jonathan cherry eric n delony robert w grzywacz historic american engineering record j white and sons mcconnell mill state park elizabeth milnarik pennsylvania department of transportation pennsylvania historical and museum commission photo mcconnell mill bridge mcconnell mill road library of congress national register of historic places

1969 - 1980

Library of Congress

http://www.loc.gov/

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