District 7 - Projects

Improving the Trancas Creek Bridge

The California Department of Transportation (Caltrans) District 7 proposes to replace the *scour- critical Trancas Creek Bridge on Pacific Coast Highway (SR-1) in the City of Malibu. The replacement is proposed due to the age of the bridge and its vulnerability to scouring during a 10- year storm. Three alternatives are being considered:

• 1.  No Build Alternative- No changes to the existing bridge.
• 2.  Bridge Replacement: Short- The new bridge would be 6’ wider (90’) and 20’ longer (120’) than the existing bridge.
• 3.  Bridge Replacement: Long- The new bridge would be 6’ wider (90’) and 140’ longer (240’) than the existing bridge.

Caltrans is initiating studies for this project. A joint Initial Study/Environmental Assessment is being prepared pursuant to CEQA (California Environmental Quality Act) and NEPA (National Environmental Policy Act). Caltrans is the lead agency under CEQA and NEPA for this project.

Click image to enlarge.

Environmental Document

Trancas Creek Bridge Replacement Project Draft ISEA (April 2017)

Quick Facts:

• •  The Trancas Creek Bridge was built in 1927, making it 89 years old.
• •  The bridge was widened in 1938.
• •  The bridge has a history of scour related issues including a wash out of the east abutment in 1967.
• •  The bridge carries an average of 22,100 vehicles per day of which 3% are trucks.
• •  Bike lanes are planned to be incorporated into the new bridge.