Knife River is an aggregates-based construction materials and contracting services provider in the United States. Co.'s operations are conducted in six operating segments: Pacific, Northwest, Mountain, North Central, South and Energy Services. Co.'s reportable segments are: Pacific, Northwest, Mountain and North Central, with South and Energy Services included in All Other. Co. mines, processes and sells construction aggregates (crushed stone and sand and gravel); produces and sells asphalt mix; and supplies ready-mix concrete. Co. is focused on vertical integration of its contracting services with its construction materials to support the aggregate-based product lines.