Summit Materials, Inc. is a construction materials company. The Company operates through three segments: West, East and Cement. As of December 31, 2016, the Company had operations in 21 states in the United States and in British Columbia, Canada. The Company's materials include aggregates, which it supplies across the United States, and in British Columbia, Canada, and cement, which it supplies along the Mississippi River from Minneapolis to New Orleans. Within its markets, it offers construction materials and related downstream products through its vertical integration. In addition to supplying of aggregates to its customers, the Company also uses its materials internally to produce ready-mix concrete and asphalt paving mix. Its construction materials operations consists of aggregates production, including crushed stone and construction sand and gravel, cement and ready-mixed concrete production, and asphalt paving mix production.