Chalk Hill Road Bridge Replacement Project

Chalk Hill Road Bridge Replacement Project

The County proposes to remove an existing one-lane substandard bridge and replace it with a two-lane bridge built on an alternate alignment. The replacement bridge would have two 11-foot lanes and two 4-foot shoulders for a total clear roadway width of 30 feet, and would cross the creek with a single-span concrete box girder supported by reinforced concrete abutments. Retaining structures would be built along the west side of the bridge at the north approach roadway to minimize the take of farmland for new right-of-way, and at the south approach roadway to minimize the extent of embankment fill. The Project would remove the existing bridge following completion of the replacement bridge. Additionally, scour countermeasures would be implemented to stabilize the south creek bank and to protect the new replacement bridge.

Healdsburg

Sonoma

Countywide, Northern California

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 Transportation, Division of Transportation Planning (DOT), California Department of Water Resources (DWR), California Governor's Office of Emergency Services (OES), California Highway Patrol (CHP), California Native American Heritage Commission (NAHC), California Natural Resources Agency, California Public Utilities Commission (CPUC), California Regional Water Quality Control Board, North Coast Region 1 (RWQCB), California State Coastal Conservancy (SCC), 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, State Water Resources Control Board, Division of Water Rights, State Water Resources Control Board, Divison of Financial Assistance

Transportation:Other (Bridge Replacement)

Project Approval

Aesthetics, Agriculture and Forestry Resources, Air Quality, Biological Resources, Cumulative Effects, Drainage/Absorption, Energy, Flood Plain/Flooding, Geology/Soils, Greenhouse Gas Emissions, Growth Inducement, Hazards & Hazardous Materials, Hydrology/Water Quality, Land Use/Planning, Mineral Resources, Noise, Population/Housing, Public Services, Recreation, Septic System, Sewer Capacity, Solid Waste, Transportation, Tribal Cultural Resources, Utilities/Service Systems, Vegetation, Wetland/Riparian, Wildfire