Crawfish River at Milford (Excerpt from SIR 2008-5235)
The Crawfish River flows south through the community of Milford in Jefferson County (appendix 5). Extensive and long-term flooding caused significant crop losses in the area upstream from Milford (Vic Imrie, Town Chair, Town of Milford, oral commun., August 2008). Because most of the town is on a local topographic high, relatively few structures or houses were damaged.
The modeled inundated area of flooding in Milford (appendixes 5B and 5C) is especially detailed because of the 3-m resolution of the Jefferson County DEM data. The USGS high-water marks were corroborated with nearby high-water marks surveyed by Jefferson County officials during the flood (not shown on appendix 5B). The high-water marks were corroborated with gage heights at the nearby USGS streamgage on the Crawfish River at County Highway A (table 3, appendix 5B). The streamgage had a flood-peak elevation of 792.7 ft. The high-water marks upstream and downstream from the streamgage/bridge were 792.8 and 791.8 ft, respectively. As with the La Farge and Gays Mills maps, the flood-peak-elevation checks show that the streamgage data corroborate the accuracy of the high-water marks. Similar to Reedsburg, the combination of verified high-water-mark data and 3-m DEM data resulted in accurate inundation maps.
Photo of streamgage housing and high-water mark upstream of County Highway A bridge, looking south, August 5, 2008. Photo from USGS.
Appendix 5A. High-Water Mark Table (pdf) (excel) (shapefiles)
Appendix 5B. Flood-Peak Inundation Maps (pdf) (shapefiles)
Appendix 5C. Flood-Depth Maps (pdf) (grids)
Appendix 5D. Flood-Peak Water-Surface Profile (pdf)
Link to real-time streamgage 05426000 Crawfish River at Milford, Wis