WSP USA provided mechanical-electrical-plumbing (MEP) engineering, as well as lighting and sustainability design for the seven-story commercial office building. WSP’s MEP, Built Ecology and lighting teams collaborated with architect Weber Thompson to design and engineer Watershed to meet two of the most challenging green building standards in the world: The International Living Future Institute’s Living Building Challenge (LBC) and the City of Seattle’s Living Building Pilot program.
This project set a high bar by enrolling in these programs, both rigorous certification programs that define the most advanced measure of sustainability for buildings and landscapes. For LBC, the project selected three performance areas, or “petals”, to pursue: Place, Beauty and Materials, in which lighting played an essential role.
The WSP lighting design team took on this exciting challenge to create a design to meet these rigorous sustainability goals. Our team’s project strategies included: creating a system to capture and clean stormwater runoff from adjacent bridge and rainwater for building water needs; reducing energy consumption via high efficacy LED luminaires and advanced glazing technology; and doing detailed materials research to source local, salvaged and sustainable products, all while maintaining open communication between suppliers and team members.
The consultants and design team established an integrated multidisciplinary approach early in the design process, which helped to develop and implement synergistic lighting solutions. The developed solutions allowed for a 33 percent reduction in total energy consumption (per Seattle Energy Code baseline), with an overall lighting power density of 0.47 watts/sf. Our team’s purposeful lighting design strategically highlighted the various architectural materials rendering its character and lighting alone resulted in 48 percent less energy usage than code baselines.