The vortex tube is a component of the Santa Rosa Creek Diversion structure, originally built in the early 1960s. The vortex tube is a 96-inch diameter RCP culvert with a cast-in-place transition area beneath Montgomery Drive. BKF was retained by the Sonoma County Water Agency to investigate the alternatives for the vortex tube rehabilitation and the bypass pipe trenchless method of installation. The scope also included the preparation of the contract documents for the preferred alternatives and providing design services through construction.

• Rehabilitation of 112 linear feet of 96-inch RCP pipe with Fiber Reinforced Concrete & Mortar
• Replacement of the transitional area
• Installation of a 36-inch steel bypass under Montgomery Drive by auger boring to facilitate future maintenance of the Vortex Tube