The newly built <a href="https://en.wikipedia.org/wiki/Wilmington_Rail_Viaduct" class="extiw" title="w:Wilmington Rail Viaduct">Wilmington Rail Viaduct</a> of the <a href="https://en.wikipedia.org/wiki/Philadelphia,_Baltimore_and_Washington_Railroad" class="extiw" title="w:Philadelphia, Baltimore and Washington Railroad">Philadelphia, Baltimore and Washington Railroad</a> (<a href="https://en.wikipedia.org/wiki/Pennsylvania_Railroad" class="extiw" title="w:Pennsylvania Railroad">Pennsylvania Railroad</a>). The stone abutment on the right, for the Linden Street bridge behind the photographer, marks the north end of the brick viaduct and the beginning of <a href="https://en.wikipedia.org/wiki/retaining_wall" class="extiw" title="w:retaining wall">retaining wall</a> and fill construction. The middle and right tracks at ground level are the old PB&amp;W main line; one of these tracks was removed after the completion of the viaduct and the other retained for local switching. The leftmost track is the <a href="https://en.wikipedia.org/wiki/Baltimore_and_Ohio_Railroad" class="extiw" title="w:Baltimore and Ohio Railroad">Baltimore and Ohio Railroad</a>'s Market Street Branch.
<a rel="nofollow" class="external free" href="https://www.loc.gov/pictures/item/de0215.photos.032109p">https://www.loc.gov/pictures/item/de0215.photos.032109p</a>