Portal North, the new Gateway Program fixed-span bridge on the Northeast Corridor (NEC) situated between New Jersey and New York that will replace 112-year-old moveable-span Portal Bridge, has been getting the bulk of public and political attention in recent years. But some 35 miles southwest, on the electrified portion of NJ Transit’s North Jersey Coast Line (NJCL), there’s another bridge replacement project of perhaps equal importance. This one is located on the Raritan River, between Perth Amboy and South Amboy, N.J.