District 4 Environmental Documents by County

Alameda

I-580 and Interstate 205 Roadside Safety Improvement Project

• Initial Study with Proposed Negative Declaration

I-580 Safety Lighting Project

• Initial Study with Mitigated Negative Declaration
• Initial Study with Proposed Mitigated Negative Declaration (PDF)

I-680 HOV/express lanes project

• Initial Study with Proposed Mitigated Negative Declaration/Environmental Assessment

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

U.S. 101 Storm Damage Repair Project

• Notice of Availability of a Section 4(f) De Minimis Determination for U.S. 101 Storm Damage Repair Project
• Draft U.S. 101 Storm Damage Repair Project (04-4J420) – Section 4(f) De Minimis

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 Francisco County

Better Market Street Project

• Draft Environmental Assessment STPL-5934(180)_BMS_DraftEA_(withoutAppendices)_052820
• Draft Environmental AssessmentSTPL-5934(180)_BMS_DraftEA_Appendices_052820

San Mateo

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

• Final Environmental Document
• Signed Draft Environmental Document

Santa Clara

Newell Road Bridge Replacement Project

• Final Environmental Impact Report / Environmental Assessment

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

1 Soldier Pile Wall Project

• Initial Study with Proposed Mitigated Negative Declaration
• Evaluation of Potential Section 4(f) Resources and De Minimis Impact Determination

Sonoma 1 Culvert Rehabilitation Project – North

• Initial Study with Negative Declaration (PDF)
• 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 12 Capital Preventive Maintenance Project

• Initial Study with Mitigated Negative Declaration
• Initial Study with Proposed Mitigated Negative Declaration
• Notice of Intent to Adopt a Mitigated Negative Declaration and Notice of Availability of the Initial Study with Proposed Mitigated Negative Declaration

Santa Rosa U.S. Highway 101 Bicycle and Pedestrian Overcrossing

• Initial Study with a Proposed Mitigated Negative Declaration

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District Wide Projects

State Route 37 Improvement

• Project Fact Sheet

I-680 Express Lane Completion Project

Proposed Overview - As a major north-south freeway, I-680 is a heavily traveled corridor that connects the southern San Francisco Bay Area with Interstate 80 (I-80) and passes through Santa Clara, Alameda, Contra Costa and Solano counties. Within Contra Costa County, travelers experience congestion, traffic bottlenecks within the corridor, and increased travel times. To improve system continuity, congestion relief and operations, the project—part of CCTA’s INNOVATE 680 program—proposes to construct a northbound express lane from Livorna Road to State Route 242 (SR-242). It would also convert the existing northbound high-occupancy vehicle (HOV) lane that runs from SR-242 to the Benicia-Martinez Bridge Toll Plaza, to an express lane. The goal of the project is to complete the I-680 express lane network through Contra Costa County to increase travel speeds for those choosing to use the express lane.

The commenting period will be open from June 15, 2020 to July 29, 2020.

• Virtual Scoping Meeting Website