Locations To contact someone about a potential project that requires the Western Difference, please click on the links or the map below to find your regional contact or the branch location nearest you. (Listed alphabetically by state) AR – Little Rock CA – Los Angeles CA – San Diego CO – Denver DC – Washington D.C. FL – Fort Lauderdale FL – Orlando FL – Tampa GA – Atlanta IA – Des Moines IA – Iowa City IL – Chicago IL – Peoria IL – Springfield IN – Indianapolis MN – Duluth MN – Minneapolis MO – Kansas City MO – St. Louis NC – Charlotte NE – Omaha NY – New York OH – Cleveland OK – Tulsa TX – Austin TX – Dallas TX – Houston TX – San Antonio WA – Seattle Click on your state for contact information