Berry Creek Wastewater Interceptor

The Project was managed by Walker Partners with Ward & Burke as the General Contractor, emphasising environmental compliance and advanced tunnelling technology.

This is the second largest contract awarded by the City of Georgetown and required about 60% completion within 14 months to accommodate adjacent project flows. The tunnelling mostly involved excavation through rock, with the largest tunnel bore measuring 88 inches, featuring eight customized Rinker pipe configurations. The installation included pipes ranging from 59 to 88 inches in diameter with wall thicknesses between 5.5 and 7 inches, microtunnelling through weak rock and unforeseen gravel and silt, and use of bentonite lubrication.

Berry Creek Wastewater Interceptor employed three Herrenknecht MTBM machines (AVN1200, AVN1500, and AVN1600) and a skilled team of operators, supervisors, and project managers. The Contract included construction of 24,000 linear feet of microtunnelling, 21 tunnel drives with the longest being 890 meters, and 32 shafts over two phases. It also involved installing 46 polymer concrete manholes and upgrading pump station equipment. Two-pass microtunnelling with 150-psi pressure capacity was utilised, including steel-lined TXDOT crossings and a Hobas-Rinker Hybrid pipe section. It traversed the environmentally sensitive Edwards Aquifer, requiring adherence to TCEQ guidelines to protect this area.

Works were completed in November 2025.