Founded in 1882, Ash Grove Cement Company is one of the largest producers of cement in the United States. The company operates nine cement plants across the United States. It also has two deep water import terminals as well as a quarry operation in Blubber Bay, British Columbia, Canada. Ash Grove Cement Company has various subsidiaries, such as ready-mix, aggregate, packaged materials and paving. The company manufactures and sells Portland cement and related construction products.