Roger Walton, East Central Iowa Transportation Center No description specified. 1-2 (2 Records) Documents Cultural Resources Evaluation of the Intersection Reconstruction of First Avenue at U.S. 6, City of Coralville (1999) Cultural Resources Evaluation of U.S. 6 Corridor Improvements, Stp-U-3715(615)--70-52, Johnson County, City of Iowa City (1999)