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.

Rod Gamble and Carmen Wallace have decided to leave Summit Materials to pursue other opportunities. I would like to thank Rod and Carmen for their contribution to Summit and wish them well in their future endeavors.

Summit Materials is pleased to announce the recent acquisitions of Industrial Asphalt, Inc., Asphalt Paving Company of Austin, Inc. and Ramming Paving Company, Ltd. in Austin, Texas.

New York, June 30, 2011 - Summit Materials is pleased to announce the recent acquisitions of Elam Construction, Inc., Grand Junction Concrete Pipe, Inc., Fischer Quarries, LLC, B&B Resources, Inc, Triple C Concrete, Inc., and Wind River Materials, LLC.

Tom Hill signs the 2011 NSSGA Safety Pledge.  The NSSGA Safety Pledge reads:  As aggregate producers and suppliers to the industry, we join in a commitment to a culture that promotes our employees as our most valuable resource.