Arroyo Road at Dry Creek Bridge Replacement Project

Arroyo Road at Dry Creek Bridge Replacement Project

The Proposed Project is to replace the structurally deficient Arroyo Road over Dry Creek Bridge (33C0448) with a new bridge that meets current applicable County, American Association of State Highway and Transportation Officials, and Caltrans design criteria and standards. The new bridge will be a cast-in-place, reinforced, concrete, single span, slab bridge that will accommodate two travel lanes plus shoulders and traffic rated vehicular barriers. The bridge will also accommodate a 12-foot-wide Class I bike path separated from traffic by an interior vehicular traffic rated barrier. The replacement structure will be 34-feet long and will be supported by integral diaphragm type abutments on deep foundations. The roadway profile will be raised approximately two feet to meet hydraulic and geometric requirements. To accommodate the raised profile, wider bridge structure, and longer span, the roadway centerline at the bridge will be shifted to the southwest to maintain traffic throughout construction while balancing impacts from slopes encroaching upon agricultural land (winery) to the northwest, a park to the southwest, grazing land to the northeast, and a recreational facility to the southeast. The access driveway will be reconstructed to connect to the raised roadway.

Livermore

Alameda

Unincorporated

California Air Resources Board (ARB), California Department of Conservation (DOC), California Department of Fish and Wildlife, Bay Delta Region 3 (CDFW), California Department of Forestry and Fire Protection (CAL FIRE), California Department of Parks and Recreation, California Department of Toxic Substances Control (DTSC), California Department of Transportation, District 4 (DOT), California Department of Water Resources (DWR), California Highway Patrol (CHP), California Native American Heritage Commission (NAHC), California Natural Resources Agency, California State Lands Commission (SLC), Office of Historic Preservation, State Water Resources Control Board, Division of Drinking Water, State Water Resources Control Board, Division of Water Quality, California Regional Water Quality Control Board, San Francisco Bay Region 2 (RWQCB)

California Regional Water Quality Control Board, San Francisco Bay Region 2 (RWQCB)

Transportation:Local Road

Public Works

Air Quality, Biological Resources, Cultural Resources, Geology/Soils, Hazards & Hazardous Materials, Hydrology/Water Quality, Mandatory Findings of Significance