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Office Complexes/High Tech : EBMUD Administration Building   1 The Crosby Group was entrusted by the East Bay Municipal Utility District (EBMUD) to provide design services to seismically retrofit their nine-story administration building in downtown Oakland. EBMUD is a vital agency that supplies water and provides wastewater treatment for parts of Alameda and Contra Costa counties on the eastern side of San Francisco Bay in northern California. This seismic retrofit project was challenging due to the requirement to bring the structure up to current life-safety standards and the need to maintain operational capability during the construction process. Prior to the upgrade the buildings welded beam/column connections were subject to fracture in the event of a large seismic event. The strategy was for TCG to add passive energy dissipation (viscous dampers) to reduce the demand on existing connections. The retrofit included using a 3D nonlinear time history analysis with FEMA 351/252 as the benchmark. Copyright © The Crosby Group. All Rights Reserved.