Allan Myers Bishop Asphalt Plant Hot Mix asphalt has been used on many MSHA and commercial projects in Worcester County, Md., and Sussex County, Del. The Astec Drum facility has production capabilities of 350 tons of hot mix asphalt per hour, and 440 tons of storage capacity. The facility can also produce Warm Mix. Bishop Asphalt Plant is a Maryland Certified Asphalt Plant and Delaware Approved Asphalt Plant, and enjoys FAA Certification. Bishop Asphalt Plant is located off US 113 in Worcester County, Md., on Kepler Lane, about 4 miles south of Selbyville, Del.