These appear to be some of the diagonally laid stones of Skew Arch Bridge. There is moisture on some of the stones, from an unknown source. Skew Arch Bridge is listed on the National Register of Historic Places, as part of the Allegheny Portage Railroad National Historic Site.Galleries:Allegheny Portage Railroad, Arch BridgesKeywords:allegheny portage railroad, arch bridge, bridge, damp stones under bridges, gallitzin, pennsylvania, skew arch bridgePhoto Location: Skew Arch Bridge, Allegheny Portage Railroad National Historic Site, PennsylvaniaPhotographer: Dr. Roy WinkelmanDate of Photo: 11/25/2011Device Make: CanonDevice Model: Canon EOS 5D Mark IIOriginal Dimensions: 5616×3744Picture Orientation: LandscapeGPS Coordinates: 40°27'11.00"N 78°32'34.23"WPicture Number: 15930
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