State Route 121 Bridge Railing Upgrade Project

4 Documents in Project


SCH Number
Lead Agency
California Department of Transportation, District 4 (DOT)
Document Title
State Route 121 Bridge Railing Upgrade Project
Document Type
FIN - Final Document
Present Land Use
Transportation Corridor
Document Description
The California Department of Transportation (Caltrans) has prepared this Initial Study with Negative Declaration (IS/ND) for the State Route (SR) 121 Bridge Railing Upgrade Project (Project). Caltrans would upgrade the bridge railings at Yellow Creek Bridge (approximately 44 linear feet) (post mile [PM] 6.52) and at Arroyo Seco Bridge (approximately 160 linear feet) (PM 8.43) on SR 121 in Sonoma County, California. The Project would also include widening Arroyo Seco Bridge approximately 24 inches on each side (for a total of approximately 48 inches) to accommodate the updated bridge railings, removing the metal beam guardrail and alternative flared terminal systems, and installing Midwest Guardrail System and alternative in-line terminal systems, constructing concrete anchor blocks, and installing vegetation control.

Contact Information

Brooklyn Klepl
Agency Name
Caltrans District 4
Job Title
Acting Senior Environmental Planner
Contact Types
Lead/Public Agency


Northern California
State Highways
SR 121

Notice of Completion

State Reviewing Agencies
California Air Resources Board (ARB), California Department of Conservation (DOC), California Department of Fish and Wildlife, Bay Delta Region 3 (CDFW), California Department of Parks and Recreation, California Department of Transportation, District 4 (DOT), California Department of Transportation, Division of Aeronautics (DOT), California Department of Transportation, Division of Transportation Planning (DOT), California Department of Water Resources (DWR), 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, San Francisco Bay Region 2 (RWQCB), California Transportation Commission (CATC), Department of Toxic Substances Control, Office of Historic Preservation, State Water Resources Control Board, Division of Drinking Water
Development Types
Transportation:Other (Bridge Preservation)
Local Actions
Bridge Preservation
Project Issues
Aesthetics, Air Quality, Biological Resources, Cultural Resources, Drainage/Absorption, Energy, Geology/Soils, Greenhouse Gas Emissions, Hazards & Hazardous Materials, Hydrology/Water Quality, Land Use/Planning, Noise, Public Services, Transportation, Utilities/Service Systems, Vegetation


Final Document(s) [Approved_Certified draft environmental documents]

Disclaimer: The Governor’s Office of Planning and Research (OPR) accepts no responsibility for the content or accessibility of these documents. To obtain an attachment in a different format, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at or via phone at (916) 445-0613. For more information, please visit OPR’s Accessibility Site.

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