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Gilleland Creek Stormwater Retrofits

A project to demonstrate and monitor a retrofit to a stormwater detention basin in order to improve water quality in Gilleland Creek.


Gilleland Creek in northeast Travis County has not met water quality standards for bacteria for several years.

To address this impairment, the commission adopted a total maximum daily load (TMDL) in 2007. Stakeholders then developed a TMDL implementation plan, which the commission approved in 2011. This stormwater project supported implementation of the TMDLs.

Find out more about the Gilleland Creek TMDL project to reduce bacteria and make the creek safe for swimming.

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Project Description

University of Texas personnel:

  • installed and operated an automated valve in a stormwater detention basin outlet in the Gilleland Creek watershed and
  • determined the valve's effectiveness in reducing the amount of bacteria, sediment, and phosphorus released by the detention basin into the creek.

The goal was a 50% reduction in each of the sampled pollutants. UT monitored a similar "control" basin without the retrofit for comparison.

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For More Information

To find out more about the NPS Program, call 512-239-6682 or e-mail us at nps@tceq.texas.gov.

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