I found this great video through Google+ on using AutoCAD Civil 3D and FEMA Floodplain Maps, which shows how easy it is to use FEMA GIS data in your land surveying and engineering projects.
"Importing the National Flood Hazard Layer (NFHL) Web Map Service (WMS) into a Civil 3D drawings. FEMA floodplains into an AutoCAD drawings using Map!"
Professional Land Surveyor Source: 127civileng
Watch the AutoCAD Civil 3D and FEMA Floodplain Maps Video