This volume sets forth the principal events which occurred in connection with the Outer Drive Improvement project from the date of the appointment of the Chicago Plan Commission's special Outer Drive Committee on October 22, 1926, to the date of the awarding of the contract for the preparation of the design plans and specifications for the bridges and viaduct structures, on July 25, 1929. It includes all the maps, plats, estimates of cost and other data relating to the recommended plan, and information as to the six alternate plans developed by the Plan Commission's technical staff. The material herein has been compiled from the records of the Chicago Plan Commission.