Burlington Northern U28C 5672 and another U Boat lead a train through 17th St. Yard in Superior September 1972. The Big NP U Boats were almost non existent in the Twin Ports before the BN merger but after March 1970 a lot of neat road power started to show up in the Twin Ports. The 5672 was built as NP 2806 in May 1966. Unknown Photographer Photo from my Collection.