Washington, D.C., March 19, 2012 - Summit Materials is pleased to announce the recent acquisition of the aggregates operations of Norris Asphalt Paving Company. The aggregates business, which is based in Cameron, Missouri, has 19 sites throughout northwest Missouri with over 110 million tons of permitted limestone reserves and will operate as Norris Quarries, LLC. Norris Asphalt Paving Company retains its asphalt and paving services business based out of Ottumwa, Iowa.