For the City of Petaluma Department of Water Resources & Conservation and
California Department of Water Resources Urban Stream Restoration Program

Questa directed the four-phase restoration of a 12-acre riverfront park and natural area along the upper Petaluma River, at the north end of the City of Petaluma. The project created a new restored floodplain terrace along the river to reduce local flooding and provide riparian restoration. Other elements of the plan included construction of a trailhead parking lot, visitor orientation and natural interpretive panels, and paths and trails. Two underground storm drains were daylighted to create bioswales and a restored creek tributary for water quality improvement. The trailhead parking lot uses permeable paving and directs runoff to a bioswale planted with native riparian species.

Questa assisted with project approvals, regulatory coordination, hydraulic modeling, design, and implementation, including a component of creek management completed by the California Conservation Corps. The ½-mile trail system is part of the larger Petaluma River Trail, to be implemented in phases. Questa also participated in the preparation of the Petaluma River Access and Enhancement Plan, which guides all restoration and public access planning along the river.