BART Aerial Structures - Northern California

ESE did an independent check of the retrofit plans and structural calculations by Parsons Transportation group of the Central Contra Costa Viaduct and other BART Aerial structures per BART Safety Level Performance Criteria. The Central Contra Costa Viaduct is a 31 span aerial structure that starts on single pier concrete bent caps and then opens up into two girders supported on two pier bent caps. The spans vary in length with concrete girders for shorter spans and steel girders in the longer spans.