Event Advocacy Roundtable - Atlas 14 and Austin

September 24, 2018 - 12:00pm to 1:30pm

This event has already occurred.


Austin Center for Architecture
801 W 12th St
78701 Austin
Phone: 5124524332


Atlas 14 and Austin Floodplain Regulation Changes

Please join the AIA Austin Residential Advocacy Committee, the AIA Austin Commercial Advocacy Committee, and the City of Austin department leaders (including Kevin Shunk, Watershed, Division Manager; Matt Hollon, Watershed, Division Manager; and Karl McArthur, Floodplain Office, Supervising Engineer) as we discuss Atlas 14, Austin, and proposed changes to City code.

About Atlas 14

Atlas 14 is a National Weather Service study of historical rainfall. We use historical rainfall data to understand our flood risk. The historical record for the previous rainfall study ended in 1994. Atlas 14 extends the rainfall data through 2017. Before the study, we believed that, in any given year, there was a 1 percent chance of 10.2 inches of rain falling in 24 hours in Austin. This was the official definition of the 100-year storm. The Atlas 14 study shows that this amount of rainfall is now likely to occur more frequently. The new 100-year storm will be closer to 13 inches of rain in some parts of Austin.

What the City is Doing

The City of Austin proposing to change City code to address our new understanding of this increased flood risk. Currently many of our floodplain regulations are based on the 100-year flood. The City is proposing to use the 500-year flood for regulations until floodplain maps can be redrawn. This change means that the current floodplain regulations will apply to more properties. Property owners and businesses in the interim 100-year floodplain would have new restrictions if they want to develop, expand, remodel or improve their properties.

For more information, please go to the City of Austin’s Atlas 14 web page: austintexas.gov/atlas14.

The AIA Austin Advocacy Roundtable is free and open to the public. Because space is limited, registration is required to attend.