Flood Maps

Inundation maps created spring, 2019 for the Mississippi River along the Scott County, Iowa boundary. Source DEM was the 2008-2010 State of Iowa LIDAR data. River elevations were modified to ensure proper river surface modeling. River elevation was derived from eleven profile measurements found in a U.S. Army Corps of Engineers flow study completed in 2004. River elevations were converted to NAVD88 vertical datum and correlated to the river stage at Rock Island Lock and Dam 15 gauge. The map is intended as a inundation reference for local flood preparation and response. It is an estimate and should not be construed as a precise model. Local measurements and observations should be used to determine actions.