District 4 Environmental Documents by County

Alameda

Alameda County I-580 Safety Lighting Project

• Initial Study with Proposed Mitigated Negative Declaration (PDF)

Dublin Boulevard Extension Project RTPL 5432(019)

• Draft environmental assessment

Marin

Marin State Route 1 (SR 1) Capital Preventive Maintenance (CAPM) Project

• The proposed Project is located in Marin County, California. The Project proposes to repair 27.8 noncontinuous lane miles of SR 1, and is divided into two portions. The southern portion is located between post miles (PMs) 22.8 and 33.0. The northern portion is located between PM 45.0 and PM 50.

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

Santa Clara

State Route 9 Saratoga Creek Bridge

• Final Environmental Impact Report/ Environmental Assessment and Final Section 4(f) Evaluation with Finding of No Significant Impact

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 – North

• February 2020 - Initial Study with Proposed Negative Declaration (PDF)

Sonoma 1 Culvert Rehabilitation Project – South

• June 2019 - Initial Study with Proposed Negative Declaration (PDF)
• 1k730_Section_4(f)_Evaluation_20200304
• Public Notice

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

• Proposed Mitigated Negative Declaration (MND) (PDF)
• Public Notice for the State Route (SR) 12 Capital Preventive Maintenance (CAPM) Project in Sonoma County, California

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District Wide Projects

State Route 37 Improvement

• Project Fact Sheet