Construction of the <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>). On the left, the boxcars nearest the viaduct are on a track scale in the yards of the <a href="https://en.wikipedia.org/wiki/Wilmington_and_Northern_Railroad" class="extiw" title="w:Wilmington and Northern Railroad">Wilmington and Northern Railroad</a>'s Market Street Branch. The railcars further to the left are in a small <a href="https://en.wikipedia.org/wiki/Baltimore_and_Ohio_Railroad" class="extiw" title="w:Baltimore and Ohio Railroad">Baltimore and Ohio Railroad</a> yard. To the right, the first two tracks are the original PB&amp;W ground-level main line; one track of the two would be left after the completion of the viaduct for switching and interchange. The line passing under the photographer and crossing those tracks on a diamond belongs to the B&amp;O; it splits at the switch in the foreground, with the Market Street Branch going left and the <a href="https://en.wikipedia.org/wiki/South_Side_Extension" class="extiw" title="w:South Side Extension">South Side Extension</a> going right. To the right, paralleling the Market Street Branch, is the W&amp;N's Mill Creek Connection. The Wilmington Gas Company's <a href="https://en.wikipedia.org/wiki/gasometer" class="extiw" title="w:gasometer">gasometer</a> is in the right background.
<a rel="nofollow" class="external free" href="https://www.loc.gov/pictures/item/de0215.photos.032110p">https://www.loc.gov/pictures/item/de0215.photos.032110p</a>