National Docks Secondary
... that the National Docks Secondary freight rail line uses a short tunnel that took eight years to build at twice the originally estimated cost because of a frog war with the Pennsylvania Railroad?
... that the <b id="mwF98"><a href="./National_Docks_Secondary" id="mwF-A" rel="mw:WikiLink" title="National Docks Secondary">National Docks Secondary</a></b> freight rail line uses a short tunnel that took eight years to build at twice the originally estimated cost because of a <a href="./Frog_war" id="mwF-E" rel="mw:WikiLink" title="Frog war">frog war</a> with the <a href="./Pennsylvania_Railroad" id="mwF-I" rel="mw:WikiLink" title="Pennsylvania Railroad">Pennsylvania Railroad</a>?