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Washington County Charles D Cameron Public Services Building Seismic Retrofit
Submitting Company: JE Dunn Construction
Location: Hillsboro
Cost: $35 million
Start Date: March 2017
Completion Date: May 2019
Owner/Developer: Washington County
Architect: SERA Architects
Engineer: KPFF
Additional Engineering Firms: System Design Consultants, Professional Roof Consultants, Atlas Landscape Architecture
General Contractor: JE Dunn Construction
Subcontractors: A Cut Above Concrete Cutting, Accurate Concrete, Advanced Locking, AKS Engineering & Forestry, Arrow Striping & Painting, Brix Paving Northwest, Building Material Services, Catena, Chick of All Trades, Concrete Inspection Services, Culver Glass, Curtis Restaurant Equipment, DeWitt, Dormakaba USA, EC Company, Equilibrium Engineers, GeoDesign, GeoPotential, Green Art Landscaping, Greenman Construction, Green Team, Hydro-Temp, Interior Tech, Kraft Masonry, Larusso Concrete, Legend Custom Casework, Mt Hood Window Coverings, Ness & Campbell Crane, Northstar, Northwest Precast, Northwest Scaffold Service, Penhall, Pioneer Waterproofing, Prestige Tile & Stone, RCI Architectural Sheet Metal, River City Environmental, Snyder Roofing, Sowles, Temp-Air, T-Plus, Town & Country Fence Co. of Oregon, Tube Art, Universal Fire Equipment, Westech, Western Partitions, Western States Fire Protection, Williamsen & Bleid, WFJ Janitorial Services

The project team led by general contractor JE Dunn Construction was faced with a two-pronged challenge when they took on the seismic retrofit of Washington County’s Charles D. Cameron Public Services Building in Hillsboro.

First, they had to figure out a way to modernize and seismically strengthen a 30-year-old building built with reinforced concrete and suffering from water intrusion problems in the basement. That would normally be enough for one project. But the team, which also included Sera Architects and KPFF Consulting Engineers, also had to do all this while maintaining normal building operations in the 120,750-square-foot facility.

The phased project that resulted accomplished all that, however, and provided the county with an essentially new structure built to withstand a magnitude 9.0 earthquake and remain functional in the aftermath. It also features energy-efficient upgrades to mechanical, lighting and security systems.

Essentially laid out in the shape of a T with two distinct wings, the building was upgraded one wing at a time to allow operations to continue, including the county’s critical data center. This allowed crews to minimize any invasive work during structural upgrades, which include installation of massive steel buckling restraint brace beams and concrete shear walls at building corners. The team thoroughly investigated original building plans, mapped existing utilities and demolished certain parts of the building strategically to help design and carry out the project on time and on budget.