May 27, 2010 – Summit Materials LLC (“Summit”), a heavy building materials company, today announced a majority investment in Continental Cement Company (“Continental”). Continental’s new state of the art cement manufacturing and waste processing facilities are located in Hannibal, Missouri, 100 miles north of St Louis. With distribution terminals in St Louis, Missouri and Bettendorf, Iowa, Continental supplies cement to customers in Missouri, Iowa and Illinois. Cement has been manufactured at the Hannibal site since 1903. Continental’s long history of manufacturing high quality product, providing exceptional customer service and strategic location on the Mississippi River complements Summit’s growing heavy materials business in the Midwest. Continental’s management team, led by Mike Johnson, CEO and Tom Beck, Senior Vice President will remain in place.