DACM Project Management provided project scheduling, estimating, contract administration, and tenant relocation coordination services during the construction phase of this $273 million historic restoration project. Upgrades were done to the seismic, mechanical, life/safety, energy, and security systems. Asbestos abatement was required, as well as retrofit of a base isolation system, phasing of construction activities, ADA modifications, and temporary relocation of building occupants at the 910,852 square foot, 29-story facility.
The projects overall objective was to seismically rehabilitate City Hall and preserve the historic features of the original building design. The project’s scope included complete structural upgrades and core improvements to all floors of the building in addition to complete tenant improvements to floors five through twenty-seven.

Architectural, structural, mechanical and electrical modifications at the base of the building were necessary to install the base isolation devices. Also incorporated were shear walls from the sub-basement through the twenty-eighth floor and a seismic moat, historic preservation of selected areas of the building, reconfiguration and improvement of the plumbing, mechanical and electrical systems, and modifications to utility connections to accommodate seismic movement. DACM Project Management began work with the City Hall seismic team in August 1993. Our scope of work included construction management, scheduling, and change order estimating. We also managed a phased tenant relocation out of and back into City Hall. To support this major relocation effort, we also managed the design and construction of office space at various leased or City owned buildings to which the City Hall tenants were being temporarily relocated. Tenant improvements were completed in 2001 allowing for a phased reoccupancy by tenants.