Pacific Commons

Fremont, CA

CMG led the design and regulatory approval process for this 16-acre regional stormwater treatment wetland and trail system that treats stormwater from a densely developed 514-acre watershed.

CMG is committed to creating as many wetlands as possible. Consequently, we turned this significant grading exercise into an opportunity for an artful composition of interconnected wetland systems, emblematic of our approach to system-based landscapes which combine infrastructure with ecological and water quality functions. Detailed hydrologic modelling  indicates that the system will treat an average of nearly 90% of annual runoff.

Habitat creation, hydraulic requirements, water quality parameters, public access, and maintenance  considerations are all integrated within this composed ecological design. A variety of wetland plant associations are combined in a sculpted mosaic that will emerge and evolve over time based on seasonal water depths and flows. Contours are changes of two inches and create a variety of freshwater marsh habitats.

To provide public access, CMG designed the project to connect to the regional Bay Trail system; Pacific Commons completes a mile-long section with a pedestrian loop and a series of overlook picnic areas. Along the trail, wayfinding signage and interpretive overlooks designed by CMG provide opportunities for public access and education through panels addressing regional water quality issues, bay watersheds, ecological systems, and the function of storm water treatment systems.