County to hold public discussion of the results, including June 5 at the Dicky-Givens Center in Taylor

The  preliminary results of the Atlas 14 floodplain study were presented  to the Williamson County Commissioners Court on May 21.

Preliminary results show the county’s 100-year flood shifted from 8-10 inches of precipitation to 10-12 inches. A 100-year flood is defined as an event that has a 1% chance of happening in any given year. For Williamson County, this change means there may be an increased risk of flooding if a 100-year event occurs.
 Williamson County’s Atlas 14 study includes the following findings:

  • • Updating flood plain information throughout the county with the most recent scientific data, including NOAA Atlas 14 rainfall.
  • • Modeling streams and waterways that have never been studied.
  • • Gathering accurate information about topography, drainage structures and bridges.
  • • Developing mitigation measures.

The study maps can be viewed via the link below.

Flood Studies within Williamson County (

Williamson County will host nine open house events to present the study’s findings to the public. All meetings are from 5-7 p.m.

  • May 29: Williamson County Georgetown Annex, 100 Wilco Way, Georgetown
  • May 30: Williamson County Jester Center, 1801 E. Old Settlers Blvd., Round Rock
  • June 3: The Retreat Activity Center in Sun City, 1220 Cattleman Drive, Georgetown
  • June 4: East Williamson County Higher Education Center, 1600 Innovation Blvd., Hutto
  • June 5: Dickey Givens Center, 1015 E. MLK Jr. Blvd., Taylor
  • June 6: Williamson County Cedar Park Annex, 350 Discovery Blvd., Cedar Park
  • June 10: Walburg Community Center, 4000 FM 972, Georgetown
  • June 11: Sonterra MUD Clubhouse, 510 Sonterra Blvd., Jarrell
  • June 17: St. Dominic Savio Catholic School, 9300 Neenah Ave., Austin
WilCo unveils Atlas 14 flood study findings