Los Angeles, CA
City of Los Angeles
The Riverside Roundabout is a $40 million bridge renovation spanning the LA River between the 5 and 110 freeways. This will be the first roundabout in the city of LA, designed in an effort to help control smog and exhaust impacts on surrounding residents. Hyphae Design Laboratory served as the landscape and civil engineer for the sustainable stormwater features for the entirety of this project. Working with the Bureau of Engineering and local public artist Greenmeme, Hyphae designed the art piece roundabout to also function as a stormwater bioretention landscape. The system has the capacity to capture and treat a 10 year event rainfall - or 500,000 gallons - off of the adjacent bridge and roadways. The system also includes a 25,000 gallon cistern that supplies the site’s water feature, as well as a solar tracking PV system powering on-site irrigation, lights, and artwork. Working with AECOM/HTNTB, engineers, and the city to design and correctly size the systems, Hyphae was able to convince all parties of the project’s engineering viability. Hyphae then produced full landscape and civil construction documents and specifications for the roundabout, in addition to the surrounding street trees and bioswales. We are currently in the Construction Administration phase of this project.