State Route 116-121 Intersection Improvements Project

4 Documents in Project


SCH Number
Lead Agency
California Department of Transportation, District 4
Document Title
State Route 116-121 Intersection Improvements Project
Document Type
MND - Mitigated Negative Declaration
Present Land Use
Transportation, Ag, commercial and rural residential
Document Description
Note: Review Per Lead The intersection improvement project has two proposed alternatives. The Roundabout Alternative includes construction of a hybrid multilane roundabout with 180 degrees of the circulatory roadway having two lanes, a full right-turn bypass lane in the northbound direction, and a partial right-turn bypass lane in the westbound direction. The Signalized Intersection Alternative proposes to introduce a four-way traffic signal to the project intersection. Both Build Alternatives include construction of pedestrian and bicycle facilities.

Contact Information

Arnica MacCarthy
Agency Name
California Department of Transportation, District 4
Contact Types
Lead/Public Agency


Cross Streets
SR 116 (PM 46.0/46.7), SR 121 (PM 5.8/R7.4), Bonneau Road
State Highways
SR 116, 121, 12
Son. Skypark, Son. Val.
Yellow Creek, Sonoma Creek
Other Location Info

Notice of Completion

State Review Period Start
State Review Period End
State Reviewing Agencies
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 Highway Patrol, California Native American Heritage Commission (NAHC), California Regional Water Quality Control Board, San Francisco Bay Region 2 (RWQCB), Caltrans, Division of Aeronautics, Resources Agency
Development Types
Transportation:Other (Intersection improvements)
Project Issues
Aesthetics, Agriculture and Forestry Resources, Air Quality, Biological Resources, Cultural Resources, Cumulative Effects, Flood Plain/Flooding, Geology/Soils, Growth Inducement, Hazards & Hazardous Materials, Hydrology/Water Quality, Land Use/Planning, Noise, Transportation, Vegetation, Wetland/Riparian

Disclaimer: The document was originally posted before CEQAnet had the capability to host attachments for the public. To obtain the original attachments for this document, 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.

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