District 4 Environmental Documents by County

Alameda

Alameda County I-580 Safety Lighting Project

• Initial Study with Proposed Mitigated Negative Declaration (PDF)

Marin

101 Irwin Creek Culvert Rehabilitation Project

• Final Initial Study with Negative Declaration

Napa

State Route 29 Sulphur Creek and York Creek Bridge Rail Replacement Project

• Sulphur Creek Bridge (BR# 21-0016) Napa County Route 29 PM 28.43

State Route 29/State Route 221 Soscol Junction Improvement Project

• Initial Study with Proposed Mitigated Negative Declaration/Environmental Assessment (PDF)

State Route 128 Hopper Slough Bridge Replacement Project

• Hopper Slough Bridge (BR# 21-0019) Napa County Route 128 PM 5.1

San Mateo

Bridge Seismic Restoration Project: (Alpine Road Undercrossing Bridge, Sand Hill Road Overcrossing Bridges, and Interstate-280/Interstate-380 Separation Bridges)

• Signed Draft Environmental Document

Solano

State Route 12 Roadway Resurfacing, Restoration and Rehabilitation Project

• Initial Study with Proposed Mitigated Negative Declaration/ Environmental Assessment (PDF)

Sonoma

Sonoma 1 Culvert Rehabilitation Project

• Initial Study with Proposed Negative Declaration (PDF)

State Route (SR) 12 Capital Preventive Maintenance (CAPM) Project

• Proposed Mitigated Negative Declaration (MND) (PDF)

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District Wide Projects

State Route 37 Improvement

• Project Fact Sheet