Concrete Materials Yankton Asphalt plant is located at 2210 Alumax Road in Yankton SD. This is an All-Mix Plant with capacities up to 240 TPH. Concrete Materials produces SDDOT & NDOR specified mixes and can meet any of our customer’s needs. Typical grades of asphalt binders used include: PG 58-28 & PG 64-22. We also are very involved in RAP (Recycled Asphalt Pavement). For more information, contact Justin Foss at 1-605-665-3838. The plant is open approximately May thru November as weather permits.