Caltrans 4 (Oakland)
(California Department of Transportation, District 4)
Sonoma 121 Safety Improvements Project
NEG - Negative Declaration
Present Land Use
The purpose of this safety project is to reduce occurrences of cross-centerline collisions. The project is divided in 3 segments. Segments 1 and 3 both have drainage work, and segment 3 is proposed to have the MBGR upgraded to MGS. For segment 2, there are two proposed alternatives for roadway realignment. For alternative 1, the proposed alignment would shift slightly towards the eastern side of SR 121 and there would be two retaining walls on the eastern side and a two-way left turn lane after the entrance to a winery business. For alternative 2, the horizontal curve will be straightened towards the western side of SR 121, and then realigned to the eastern side of the highway; two retaining walls are proposed, one on the eastern side and one on the western side of SR 121. Segments 1 and 3 are identical in both build alternatives.
Aesthetic/VisualAgricultural LandArchaeologic-HistoricBiological ResourcesNoisePublic ServicesToxic/HazardousTraffic/CirculationVegetationWater QualityWetland/RiparianLand Use
Air Resources Board, Transportation ProjectsCalifornia Department of Parks and RecreationCalifornia Highway PatrolCaltrans, Division of AeronauticsDepartment of ConservationDepartment of Fish and Wildlife, Region 3Department of Water ResourcesNative American Heritage CommissionOffice of Historic PreservationRegional Water Quality Control Board, Region 2Resources AgencyState Lands CommissionState Water Resources Control Board, Division of Water QualityState Water Resources Control Board, Division of Water Rights