Quote:
Originally Posted by austlar1
I am kind of confused. The link below is to a map of proposed FEMA changes to the 100year flood plain maps for Austin. In this map none of Waller Creek shows up in a 100 year flood plain, but big chunks of downtown along Shoal Creek do show up. This includes blocks that have already been built with highrises and blocks where highrises are now under construction. I guess Waller Creek is not showing on the proposed new maps because of the changes wrought by the new tunnel. I can't locate a map of the existing 100 year flood plain for downtown. Anybody know where there is a link to such a map?
http://www.atxfloods.com/FP_mods/Map.html
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The COA GIS site has a floodplain layer. Zoom in to see.
http://www.austintexas.gov/GIS/DevelopmentWebMap/Viewer.aspx
In the Layers to the right >Floodplain >Greater Austin Fully Developed Floodplain
This will give you the 25 and 100yr floodplains.
Choosing the other Floodplain gives you the .2% floodplain.
To Identify what floodplain you are looking at see the top Map Tools >Identify >click the object you wish to see.
You can build in the floodplain, Commercial (includes residential highrises) has less restrictions as to a habitable floor, they must floodproof a building. where as residential (houses) must have the First Finished Floor above the Base Flood Elevation, 1 foot COA, 2 Feet Travis County.