State Route 116 Storm Damage Permanent Restoration Project

State Route 116 Storm Damage Permanent Restoration Project

The California Department of Transportation (Caltrans) is proposing the State Route (SR) 116 Slide Repair Project (Project) to install a soldier pile retaining wall with tiebacks and upgrade the drainage system at postmile (PM) 9.55, between the unincorporated communities of Guerneville and Monte Rio in Sonoma County (Figure 1-1). The Project is considered a Major Damage (Permanent Restoration) project. During multiple storm events the slope between the westbound lane and Old Monte Rio Road has slipped, causing mud and debris to spill onto SR 116. The existing slide continues to move during precipitation events and requires frequent maintenance to keep the highway open.

Guerneville

Sonoma

Citywide, Countywide, San Francisco Bay Area

California Air Resources Board (ARB), California Department of Forestry and Fire Protection (CAL FIRE), California Department of Parks and Recreation, 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 Regional Water Quality Control Board, North Coast Region 1 (RWQCB), California State Lands Commission (SLC), California Transportation Commission (CATC), Office of Historic Preservation, State Water Resources Control Board, Division of Drinking Water, State Water Resources Control Board, Division of Water Quality, California Department of Fish and Wildlife, Bay Delta Region 3 (CDFW)

California Department of Fish and Wildlife, Bay Delta Region 3 (CDFW)

Transportation:Highway/Freeway (Slope Stabilization)

Site Plan

Aesthetics, Biological Resources, Cultural Resources, Energy, Greenhouse Gas Emissions, Hazards & Hazardous Materials, Mandatory Findings of Significance, Noise, Public Services, Transportation, Wildfire