Our Waldorf Quarry/Scalehouse location carries many types of Sand, Gravel, and Stone available for pick-up or delivery. Inventories vary from day to day, so please call ahead (888-244-0411) to confirm availability for pick-ups. MDSHA Approved GAB now available for projects all over the state of Maryland. Our GAB meets the MDSHA requirements from Table 901A & 901B from the newly published 2017 MDSHA spec book. Our QA/QC Technicians are now MDSHA Certified Aggregate Technicians so that GAB can be tested and certified before and during shipping.