This project will reduce the risk of flooding of homes, yards and streets through an upgraded storm drain system that includes detention pond improvements, upgraded storm drain pipe and new storm drain inlets.


The storm drain system in the Brassiewood Drive area was designed and constructed using outdated drainage criteria and is not able to handle large rain events. This causes homes and streets to flood during heavy rainfall. This project will reduce the risk of flooding by increasing the drainage capacity of the storm drain system.

Project Area

Map of proposed improvements

Flood Survey

Please tell us about your experiences with flooding through our online form. There is an option to send flood photos at the end of the form. Please have any photos that you'd like to share ready to upload before filling out the form.

Status and Timeline

The City of Austin completed an engineering feasibility study of the project area in September 2019. Based on this study we selected a solution that uses a multi-phased approach to implement the project to reduce risk of flooding in the project area. This approach will help provide flood risk reduction in a faster timeframe. 

Phase 1 of the project will consist of a new storm drain line that runs along Softwood Drive and Creek Bend Drive before reaching the outfall just east of the existing flood wall into Williamson Creek. This will capture a significant portion of the stormwater that currently flows into the detention pond at the end of Aviary Cove. The project is in the final stages of the design phase. The construction is scheduled to start in Summer 2024. 

Phase 2 of the project proposes to enlarge the detention pond outlet at Aviary Cove and construct a new storm drain along Pleasant Valley Road. The new outlet will capture more stormwater and lower the risk of the pond overtopping. This outlet will connect to a new storm drain system along Pleasant Valley Drive, which will convey the stormwater from the pond into Williamson Creek near the Pleasant Valley Bridge to the south. The project is currently in the design phase and construction is scheduled to start in Winter 2025. 

Phase 3 of the project will include general improvements to the stormwater infrastructure throughout the neighborhood, including inlet improvements, channel improvements, and bridge culvert improvements. This project started the Preliminary Engineering (PER) phase to study options to further reduce the risk of flooding in the neighborhood. The PER is scheduled to be completed in Spring 2024.

While we are looking for and implementing potential large-scale solutions, we are simultaneously working on short-term solutions based on input we received from the community to reduce the risk of flooding. On August 19, 2021, slot drain inlets were removed from Nesting Way and were replaced with larger curb inlets. This was done to improve the flow of water and reduce the likelihood of flooding due to debris clogging the inlets. We are also working with the Austin Fire Department to ensure that road closures are in effect during large rain events. 


Project Contacts

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