© 2018. Treve Johnson
© 2018. Treve Johnson
© 2018. Treve Johnson
© 2018. Treve Johnson
© 2018. Treve Johnson
© 2018. Treve Johnson

Frank Hagel Federal Building – Plaza Water Intrusion and Repair Design

Richmond, California

Forensic Investigation / Waterproofing

Project Type: Office

The Frank J. Hagel Federal Building is a six-story structure with a below-grade basement, a low-slope roof and exterior plazas. The Social Security Administration (SSA) is the main tenant of the building and suffered from ongoing water intrusion into the basement from the plaza above. Interactive Resources was retained by the General Services Administration to investigate and report on the feasibility of repairing the leaks.

Our feasibility study, based on site visits/inspections, testing and review of existing documentation, determined that the cause of water intrusion was the pervasive failure of the Plaza waterproofing membrane. We prepared a final report that included a summary of our findings and estimated replacement costs based on various paving systems for the replacement of the West, East, North and South plazas. Schematic design, construction documents and cost estimates were prepared for the repairs.

We worked with a landscape architect to design the pavers that were dry laid in a unified, contemporary and flexible pattern for easy replacement and movability. Updated seating options were arranged so that groups of different sizes could inhabit the space for work breaks, lunches or events. Bands of wide circular planters are in all the plazas as a means of softening the spaces with plant life.

The entire site experienced an overhaul in planting from what was once water consumptive to an almost all native, drought-resistant plant palette; thus, dramatically reducing the annual water allowance.