Mercer Corridor East
As one of the main entries into the heart of Seattle, the Mercer Corridor functions as a vital east-west link between the Seattle Center/Space Needle, theater/art districts, technology and biotechnology hubs, and two regional transportation corridors, I-5 and SR- 99. It highlights the ability of transportation corridors to connect open spaces and neighborhoods using sustainable landscape design that addresses stormwater management, flood/drought resiliency, and multiple modes of transportation. Known to Seattleites for years as “The Mercer Mess,” the project is part of a larger, city-wide reconfiguration to ease vehicular congestion. Receiving partial funding from a federally-sponsored TIGER grant, the project integrated “complete street” principles to improve access, safety, and circulation. Sustainability goals where met through the incorporation of large soil volumes, increased planting soil depths, structural planting soils, and stormwater detention facilities integrated into the medians and street edges. More than 200 trees were planted within the project, contributing to the city’s urban forest canopy goals. The project achieved the highest “Greenroads” score in the United States and was awarded APWA’s 2015 Transportation Project of the Year Award.