Laguna Canyon Creek Erosion Control and Restoration Project

Laguna Canyon Creek Erosion Control and Restoration Project

The City of Laguna Beach Public Works Department is proposing the project, in order to restore Laguna Canyon Creek's hydrological and biological functions, and values along the 270 lineal feet of creek on City property at 20612 Laguna Canyon Road. The project is specifically intended to limit erosion and increase channel capacity. The project proposes to remove accumulated sediment within the Laguna Canyon Creek channel and install articulating concrete block (ACB) (Armorflex) lining along channel banks and other improvements. The project's proposed improvements/modification include: ACB Armorflex lining along both channel banks immediately north of the existing vehicular access bridge for reinforcement and protection; relocation of the existing pedestrian bridge to the south, immediately adjacent to the existing vehicular access bridge; an approximately 10-foot long, poured-in-place concrete transition structure to the existing reinforced concrete boxes (RCB), underneath the relocated pedestrian bridge, to convey flows from the creek widening underneath the vehicular access bridge; an approximately 4.5-foot high concrete retaining wall along the western channel bank, adjacent to the parking lot; bio-engineered slope protection (riprap with cuttings and three bendway weirs) along the toe of the eastern slope, immediately west of the Mammal Center; stream bank recontouring with understory plantings on the west slope, south of the vehicular access bridge; and remove non-native plant species and replace with native species (i.e. herbaceous plants and larger canopy tree species) throughout to address erosion and habitat loss.

Laguna Beach

Orange

California Air Resources Board (ARB), California Coastal Commission (CCC), California Department of Fish and Wildlife, South Coast Region 5 (CDFW), California Department of Parks and Recreation, California Native American Heritage Commission (NAHC), California Regional Water Quality Control Board, San Diego Region 9 (RWQCB), California State Lands Commission (SLC), Department of Water Resources, Office of Emergency Services, California, Office of Historic Preservation, Resources Agency, State Water Resources Control Board, Divison of Financial Assistance, California Department of Transportation, District 12 (DOT)

California Department of Transportation, District 12 (DOT)

Water Facilities (Type Erosion Control)

Site Plan, Emergency CDP

Aesthetics, Agriculture and Forestry Resources, Air Quality, Biological Resources, Coastal Zone, Cultural Resources, Cumulative Effects, Drainage/Absorption, Flood Plain/Flooding, Geology/Soils, Growth Inducement, Hazards & Hazardous Materials, Hydrology/Water Quality, Land Use/Planning, Mineral Resources, Noise, Population/Housing, Public Services, Recreation, Schools/Universities, Septic System, Sewer Capacity, Solid Waste, Transportation, Vegetation, Wetland/Riparian, Wildfire, Wildlife, GHGE