William G. Stratton Building 401 S. Spring St. Third Floor, Stratton Bldg Springfield, IL 62706 Get Directions PH: 217/782-2864 TDD: 217/524-4449 FAX: 217/524-0565 James R. Thompson Center 14th Floor 100 West Randolph Street Chicago, IL 60601 Get Directions PH: 312/814-6000 FAX: 312/814-2041 Dunn-Richmond Economic Development Center Room #258 150 Pleasant Hill Road Carbondale, IL 62901 Get Directions PH: 618/453-8232 FAX: 618/453-8233 Ottawa Satellite Office 2nd Floor IDOT Dist # 3 Hdqtrs 700 E. Norris Drive Ottawa, IL 61350 Get Directions PH: 815/433-7121 FAX: 815/433-7123