Developed in collaboration with landscape architects Gustafson Guthrie Nichol, the design interprets the landscape, geology and cultural history of Washington and the Columbia River. Above, the Connector features a promenade lined with flowing water, a native Camas prairie and a wetland meadow. At highway level, a vaulted and coffered concrete structure provides durability, efficiency and sound mitigation. The Connector is organized as a series of intersecting and overlapping plates that allow light to pass from upper to lower levels, and offer framed views of the city and sky.