Train traffic has resumed through the site of Friday’s derailment of 14 rail cars in Mosier, but a railroad representative said there will be no unit oil trains going through until clean-up finished.  A unit train is a train in which all cars carry the same commodity and are shipped from the same origin to the same destination, without being split up or stored en route.  Union Pacific spokesman Justin Jacobs said multiple agencies inspected the incident scene and track, and made a combined decision Sunday night that it was safe to run trains again, with the railroad instituting a slow order to reduce the speed limit through Mosier from 30 to 10 miles per hour until clean-up is finished.  Jacobs says so far the trains coming through have been mixed manifest, adding “they do not to intend to run any unit crude oil trains in the near term, and will inform the community when they are back to normal operations.”  The restart has made many unhappy.  The Mosier City Council had passed a resolution at an emergency meeting on Sunday asking Union Pacific Railroad to wait until clean-up of the site is finished before rail traffic continued.  Columbia Riverkeeper Executive Director Brett VandenHeuvel issued a statement through YouTube expressing his displeasure, calling running trains through an area where the derailed cars still have oil in them “unbelievable.”  Oregon’s Senators Jeff Merkley and Ron Wyden, Governor Kate Brown and Representatives Earl Blumenauer and Suzanne Bonamici released a statement today calling for a temporary halt to oil train traffic in the Gorge.