The Georgia Engineer is published bi-monthly by a4, inc. for the Georgia Engineering Alliance and sent to members of the Georgia Society of Professional Engineers, American Council of Engineering Companies of Georgia, American Society of Civil Engineers/Georgia and American Society of Agricultural Engineers/Georgia, and to the Institute of Transportation Engineers; local, state, and Federal government officials and agencies; businesses and institutions. Opinions expressed by the authors are not necessarily those of the Alliance or publisher nor do they accept responsibility for errors of content or omission and, as a matter of policy, neither do they endorse products or advertisements appearing herein. Parts of this periodical may be reproduced with the written consent from the Alliance and publisher. Correspondence regarding address changes should be sent to the Alliance at the address above. Correspondence regarding advertising and editorial material should be sent to a4, inc. at the address listed above.