Rock River at Beloit (Excerpt from SIR 2008-5235)
The Rock River runs south through the city of Beloit in southern Rock County and into northern Illinois (appendix 9). The modeled inundated area of flooding is very detailed because of the 1-m-resolution DEM data that were created from 2-ft topographic contours of the Beloit area. For the portion of the reach in Illinois, a 1-m DEM was obtained and combined with the city of Beloit data during data processing. Flooding in Beloit was similar to that in Janesville: a floodwall and dam protected much of the city, and the areas that otherwise might have flooded were protected with sandbags. Areas below the dam that were modeled as inundated were corrected by the city engineer.
Photo of Rock River, looking west-southwest, June 21, 2008. Photo from Allan Brillman.
Appendix 9A. High-Water Mark Table (pdf) (excel) (shapefiles)
Appendix 9B. Flood-Peak Inundation Map (pdf) (shapefiles)
Appendix 9C. Flood-Depth Map (pdf) (grids)
Appendix 9D. Flood-Peak Water-Surface Profile (pdf)