Salmon Creek Bridge Replacement
The California Department of Transportation (Caltrans) proposes to replace the Salmon Creek Bridge on Route 1 in Mendocino County. The current bridge, built in 1950, has a concrete deck over steel beams. The bridge is functionally obsolete because it is narrow and does not meet current standards for shoulders and guardrails. Maintenance costs are high because the steel beams must be repainted regularly.
Project Purpose & Need
The proposed Salmon Creek Bridge Replacement project would replace the existing functionally obsolete and structurally deficient bridge with a structure that would ensure the safety and reliability of this critical link on State Route 1 of the state highway system. The Project's purpose includes improving the structural and geometric deficiencies of the bridge and approach roadways to ensure uninterrupted traffic movements in the event of an accident, seismic event, or other catastrophic failure and reduce ongoing maintenance costs; provide wider shoulders for bicyclists and for motorists experiencing breakdowns and providing safe bicycle and pedestrian movement across Salmon Creek.
The Salmon Creek Bridge and approach roadways have structural and geometric deficiencies. These deficiencies can result in interrupted traffic in the event of an accident, seismic event, or other catastrophic failure. These deficiencies also create high ongoing bridge maintenance costs. Additionally, the bridge only has one-foot shoulders, which are unsafe for bicyclists and motorists experiencing vehicle breakdowns. Finally, the existing bridge does not have a dedicated pedestrian or bicycle pathway.
Public Scoping Meeting
- PowerPoint presentation - September 2018 (PDF)
- Notice of Preparation of an Environmental Impact Report - August 2018 (PDF)
- Agency Comments (PDF)
- Other Comments (PDF)
- Public Comments (PDF)
Value Analysis Study
- Final Value Analysis (VA) Study Report - Full Report for Albion River and Salmon Creek Bridges - October 2013 (PDF)
- Project Study report - August 2009 (PDF)
Planned Geotechnical Investigation
- Lead Compliance Health and Safety Plan - Geotechnical Drilling and Access Road/Drill Pad Construction - October 2018 (PDF)
- Geotechnical Investigation Plan Memo - Revised November 2014 (PDF) NOTE: Proposed grading of the access roads and drill sites has been significantly reduced and will be limited to grading needed to construct the proposed access road approach from the highway. See the updated Drilling access plan below.
- Updated Drilling Access Plan - November 2017 Plan (PDF)
- Geotechnical Investigation Plan (PDF)
- Mendocino Coastal Permit Administrator Staff Report CDP 2016-0038 - April 2017 (PDF)
- Categorical Exemption/Categorical Exclusion Determination Form to perform geotechnical investigation - September 2016 (PDF)
- California Department of Fish and Wildlife Lake or Streambed Alteration Agreement Notification No. 1600-2016-0546-R1 - February 2017 (PDF)
- Notice of Applicability for Coverage under the State Water Resources Control Board 401 Water Quality Certification Right of Way Permit to Enter Salmon Creek Bridge - November 2016 (PDF)
- Geotechnical Drilling Investigation Natural Environment Study (NES) - May 2016 (PDF)
- Wetlands Delineation Report - February 2016 (PDF)
Plans and Maps
- Time-Critical Removal Action Workplan - Residential Parcels - February 2018 (PDF)
- Initial Site Assessment and Transmittal of Preliminary Site Investigation Report - April 2015 (PDF)
- Preliminary Endangerment Assessment Report - August 2017 (PDF)
- Map of Lead-Impacted Soil - May 2017 (PDF)
- Asbestos, Lead-Containing Paint, and Dust Wipe Survey Report - September 2017 (PDF)
- Lead Compliance Health and Safety Plan - November 2017 (PDF)
- Preliminary Site Investigation Report - January 2015 (PDF )