Welcome to the 6th Street Bridge

 Old Bridge:  • 1932 Constructed and put into service  • 2011 the viaduct was found to be in need of replacement due to alkali-silica  reaction (ASR) effects, the Viaduct’s concrete continues to degrade throughout the  main structural elements and has significantly reduced the structure’s capacity to  resist earthquake

 Bridge Type:  • Tied Arch Network Post-Tensioned Steel Reinforced Cast-in-Place Concrete  • Setting on Triple Friction-Pendulum Isolation Bridge Bearings, for seismic base  isolation, allowing movement of 30 inches in any lateral direction  • All designed to withstand Seismic earthquakes