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Onion Creek Watershed Hydraulic Study

Hays County, in collaboration with the Texas Water Development Board (TWDB), is conducting a hydraulic study to better understand water flow from the Onion Creek Watershed. The study results will aid the county with updating existing floodplain maps.

As part of the study, the county is hosting a public meeting from 4-7 p.m. Thursday, Sept. 14, 2023, to share more information on the study and seek input from community members within the study area.

The public meeting is an opportunity for community members to learn about the study and share input on flooding and water flow concerns in the area. This study will help the county better understand water flow from the Onion Creek Watershed and what areas would be impacted by 100-year and 500-year storm events. This study will also identify conceptual flood mitigation alternatives for areas with repetitive flooding impacts. See the flyer.

Hays County/Onion Creek Hydraulic Study Public Meeting Materials

Thank you for your participation in the Onion Creek Watershed Hydraulic Study. The purpose of the public meeting is to share information and gather input from community members on flooding and water flow concerns in the area. The following information is the same information that is being shared at the in-person public meeting.

In-Person Public Meeting
Thursday, September 14, 2023 | 4:00 p.m. – 7:00 p.m.
Driftwood Community Center
15112 W RR 150, Driftwood, TX 78619

Please view the information and share your input.


Please share your comments through the online comment form, by email or mail. The comment period is from Thursday, September 14 to Thursday, September 28, 2023.

View and download Onion Creek Watershed Hydraulic Study materials (PDF)

Online Comment Form 


View and print comment form (PDF)
Onion Creek Watershed Study
PO Box 5459, Austin, TX 78763


Hays County