The contractor shall provide delivery of 860 cubic meters (1,515 metric tons / 1,491 imperial tons / 1,670 short tons) of 3” [75 mm] nominal size ballast rock and 575 cubic meters (1,193 metric tons / 1,175 imperial tons / 1,316 short tons) of graded crushed aggregate base course to Daegu (K-2) Air Base, Daegu, Republic of Korea.