WATER - STORMWATER
Location: Newport Beach, CA
Michael Baker International provided planning, design, and permitting for the construction of erosion control improvements for the stabilization and restoration of Lower Buck Gully in the City of Newport Beach. The canyon had been experiencing significant erosion in recent years as a result of urbanization within its watershed boundaries. The proposed project included the reconstruction and restoration of Lower Buck Gully channel through the use of grade control structures and bendway weirs. Gabion (rock-filled) grade control structures were installed along the canyon to restore the stream invert to its original grade and to establish an equilibrium slope. Bendway weirs were used to prevent future erosion and bank failures at critical bends in the stream. Grading and planting plans were prepared for the canyon to restore the stream to a more natural condition. Michael Baker International provided detailed hydrology, hydraulic, and sediment transport studies for development of the final design. Michael Baker International's services also included obtaining permits from the California Coastal Commission, and regulatory permits from the Army Corps of Engineers, State Fish & Game, and Regional Water Quality Control Board. The project required the dedication of easements from the adjacent properties to the City. Michael Baker International worked with the City to outreach to the properties owners and coordinated meetings and workshops with the owners to gain consensus from the owners necessary for the project to be constructed. The project was also augmented to treat surface water runoff from the existing developments in the tributary watershed. Innovative subsurface wetland treatment facilities were designed in the stream between the gabion grade control structures to improve water quality for the downstream public beach. Michael Baker International is currently providing biological monitoring services for Buck Gully. The 5 year monitoring program includes conditional rapid assessment, qualitative and quantitative monitoring and the preparation of annual reports. The reports will be submitted to four regulatory agencies.