Burlington Northern Piggy Packer working at the intermodal yard in South Seattle, Washington in 1980. Photo by J.M. Fredrickson. Other Subject Classes: piggy back car.

Burlington Northern Piggy Packer working at the intermodal yard in South Seattle, Washington in 1980. Photo by J.M. Fredrickson. Other Subject Classes: car loader.

Burlington Northern Piggy Packer working at the intermodal yard in South Seattle, Washington in 1980. Photo by J.M. Fredrickson. Other Subject Classes: piggy back car.