Baraboo River at Reedsburg (Excerpt from SIR 2008-5235)
The Baraboo River flows for approximately 2.5 mi southeast through the community of Reedsburg in Sauk County (appendix 1). The accuracy of the USGS high-water marks was corroborated with nearby high-water marks surveyed during the flood by the city of Reedsburg. Aerial photographs taken around the peak of the flood were an additional way to confirm the accuracy of the modeled inundated area in Reedsburg (fig. 7). The flooding along North Webb Avenue in Reedsburg is an example of how the flood-extent map closely reflects the actual conditions in that some of the houses along North Webb Avenue, the community pool, and the intersection with Main Street were not flooded. Several blocks were flooded upstream and downstream from State Highway 33 (Main Street), which runs through the center of town. The houses southwest of town along Granite Avenue were especially devastated from high-velocity flows constricted at the railroad bridge. The modeled inundated area of flooding in Reedsburg (appendixes 1B and 1C) is especially detailed because of the 3-m resolution of the Sauk County DEM data. Reedsburg flood-peak inundation maps were verified through a series of aerial photographs taken on June 10, and no corrections were necessary. There is no USGS streamgage in Reedsburg, but peak streamflow for the Baraboo River was estimated to be 11,500–12,500 ft3/s (table 4).
Photo of Main Street, looking east, at downtown Reedsburg, June 10, 2008. Photo from City of Reedsburg.
Appendix 1A. High-Water Mark Table (pdf) (excel) (shapefiles)
Appendix 1B. Flood-Peak Inundation Map (pdf) (shapefiles)
Appendix 1C. Flood-Depth Map (pdf) (grids)
Appendix 1D. Flood-Peak Water-Surface Profile (pdf)