1. Delineation of flooding within the upper Mississippi River Basin-flood of June 19-July 31, 1993, in Davenport, Iowa and vicinity Yale Public content 1996. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Geological Survey (U.S.). The Survey. English. Public. Iowa, Davenport Metropolitan Area, Illinois, and Rock Island Metropolitan Area.