DUBUQUE, IOWA.

SEC. 323. DUBUQUE, IOWA. The project for navigation, Dubuque, Iowa, authorized by section 101 of the River and Harbor Act of 1960 (74 Stat. 482), is modified to authorize the development of a wetland demonstration area of approximately 1.5 acres to be developed and operated by the Dubuque County Historical Society or a successor nonprofit organization.