At the Avenue 15 ½ Grade Separation, crews have completed construction of the substructure including columns and bent caps. Concrete has been placed at the east abutment and crews are now forming the west abutment. Girders will be set for the superstructure later this Spring. When complete, the Avenue 15 ½ Grade Separation will be 468-feet long, and 40-feet wide and will take trains over BNSF and future high-speed rail lines.