Environmental Consulting

Playa Vista Freshwater Marsh | Los Angeles County, CA

Playa Vista Development


Wetland Planning and Design
Habitat Restoration
Hydraulic Engineering


ACEC – Engineering Excellence Award

Flood Control, Water Quality Improvement, Habitat Enhancement

Coastal freshwater marshes, which provide valuable ecological functions, are presently one of the rarest habitats in Southern California. The constructed 26-acre freshwater marsh, part of the 1,087-acre Playa Vista master-planned, mixed-use community in Los Angeles, serves three major functions: flood control, improved water quality and enhanced biological habitat.

Since completion, this freshwater marsh serves as feeding and breeding habitat for many species of coastal birds, including the endangered Least Bell Vireo.

Psomas provided wetlands planning and design including drainage and water quality planning. Innovative hydraulic design elements included structural and non-structural Best Management Practices such as catch basin filters, wetlands systems, and detention facilities.