Burlington Northern caboose Number 10029 at rear of coal train with Burlington Northern open hoppers in Saint Paul, Minnesota on October 4, 1980. Photo by Al Christianson.

Burlington Northern GP40 Number 3026, former Burlington Number 626; SD40 Number 6301, built October 1971; leased Precision SD18m Number 18*9 in Saint Paul, Minnesota with eastbound freight on August 11, 1980. Photo by Al Christianson.

Burlington Northern GP40 Number 3028, former Burlington Number 628; GP40 Number 3002, former Burlington Number 172; passing Newport interlocking tower in Newport, Minnesota with eastbound freight on November 25, 1980. Photo by Al Christianson.

Burlington Northern GP40 Number 3028, former Burlington Number 628; GP40 Number 3002, former Burlington Number 172; SD7 Number 6051, former Burlington Number 403; passing Hoffman Avenue interlocking in Daytons Bluff, Minnesota with eastbound freight on December 1, 1980. Photo by Al Christianson.

Burlington Northern GP40 Number 3028, former Burlington Number 628; GP40 Number 3002, former Burlington Number 172; SD7 Number 6051, former Burlington Number 403; passing Newport interlocking in Newport, Minnesota with eastbound freight on December 1, 1980. Photo by Al Christianson.

Burlington Northern GP10s headed by 1105 with caboose and covered hoppers in Saint Paul, Minnesota on October 12, 1980. Photo by Al Christianson.

Great Northern block signal at Bellingham, Washington. Rear of southbound block signal 986 at milepost 98.6; Mount Baker Plywood and Olympic Portland Cement Company dock spur in background. Other subject categories: Signal-Block, pier, Right-of-Way, Water

Great Northern block signal at Bellingham, Washington. Northbound block signal 986 at milepost 98.6. Other subject categories: Signal-Block, Poles-Telegraph, Right-of-Way

Great Northern block signal at Bellingham, Washington. Southbound block signal 986; photograph sequence TRWahl0275-0276. Other subject categories: Signal-Block, Industrial Buildings, Signal

Great Northern track at Bellingham, Washington. Southbound and northbound block signals at milepost 98.6; bridge 58.2 and Olympic Portland Cement Company dock spur visible in background. Other subject categories: Right-of-Way, Signal-Block, Signal