Atlas Design served as the City of Austin Project Manager on the $50M project to expand the capacity of the downtown wastewater system to accommodate the continued growth of downtown and south Austin. The project scope included over 20,000 linear feet of wastewater tunnel, ranging in size from 36“–120” diameter. The tunnel alignment included three (3) crossing beneath Lady Bird Lake, construction or improvements to eight (8) tunnel access shafts, and decommissioning of the Shoal Creek Lift Station at Cesar Chavez and the Toomey Lift Station. In addition, the project utilized innovative materials to provide a significant increase in corrosion resistance of structures through the use of polymer concrete.