Four ponds maintained by the City of Austin in the Sendera and Circle C neighborhoods are in need of repair. These ponds were designed with clay liners that have proved inadequate. Their deterioration could lead to polluted stormwater entering the aquifer that feeds Barton Springs. This project will replace the clay liners with modern geomembrane liners. It will also improve berms and irrigation systems around the ponds. When construction is complete, the pond edges will be revegetated with native wetland plants.