Recycled Water Infrastructure Provides Critical Water Supply in Midst of Drought

The City of Pleasanton began construction of Phase 1A of their recycled water distribution system in 2015 to provide a critical water source in an area of persistent drought. Given a firm mandate from the City Council, the City of Pleasanton and RMC Water and Environment had a four-month window to design the project consisting of two supply turnouts and over 50,000 linear feet of 20-inch to 6-inch recycled water line to be installed by open cut methods within the vital Hacienda Business Park with restraint requirements and curved alignments. The project also included a 1,500-foot directionally drilled 16-inch pipeline crossing of Arroyo Mocho Creek. The design team implemented a unique utilities investigation approach to save time and used different pipe materials to accommodate varied levels of soil corrosivity, geotechnical conditions, and installation methods. The innovative approaches to design, bid, and construction, which resulted in reducing the duration for the project, completed in July 2016, will be discussed in this paper.