Salt Lake City Division of Urban Forestry
ACEC – Engineering Excellence Awards, Merit Award
Reducing Stormwater Runoff and Saving a Silver Maple
Salt Lake City’s Urban Forestry Division wanted to save a large silver maple tree located in the center of the Wasatch Touring Building’s planned new parking lot. They approached Psomas for a sustainable solution, who agreed to work on a pro bono basis.
Surrounded by impervious concrete, an inadequate amount of water was reaching the tree’s root system. Psomas redesigned the parking lot with pervious concrete, allowing water to seep directly through the surface into the underlying soils.
In addition to saving the tree, the sustainable parking lot re-design is helping the water find its way back into the local aquifer. Pervious concrete also reduces stormwater impacts by eliminating hard surface runoff, allowing parking lots to serve as stormwater management systems.