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Project No. RW909; Project File No. E5003 

Location

Higgins Canyon Road at Mills Creek (Half Moon Bay Area)

About the Project

The Higgins Canyon Road Bridge at Mills Creek Embankment and Wingwall Repairs Project will repair the failing embankment and exposed wingwall of the bridge. The work to be done consists, in general, of installing a wingwall underpinning system, constructing a retaining wall with ground anchors, drainage improvements, and installing a rock slope protection revetment with plantings, and erosion control/slope protection.

Public Works Contact

Anthony Lum
Senior Engineer 
alum@smcgov.org
650-363-4100

Contractor

TBD

UPDATES
  • March 2022 - 100% Draft Plans and Specs completed 
  • April 2022 - Project out to bid, Bid Opening scheduled for May 12th, 2022 
  • May 2022 - Bid Opening took place May 12, 2022. Advanced Geotechniques, Inc. was the responsible low bidder and will be awarded the project on June 14th, 2022
  • June 2022 - Contract awarded to Advanced Geotechniques, Inc. on June 14th 
  • July 2022 - Contractor to start construction early August
  • August 2022 - Contractor has started excavation and revetment work on the slope.
  • September 2022 -
    • Contractor completes revetment work, and drill and construct soldier pile wall
    • Construction Status: 66% Complete
  • October 2022 -
    • Contractor starts backfill for the soldier pile wall
    • Construction Status: 84% Complete
  • November 2022 -
    • Contractor finalized backfill for the soldier pile wall, installed and test tiebacks, finalized boulder revetment elevation
    • Construction Status: 94%
  • December 2022

    • Contractor completed testing of tiebacks, and installed erosion control

    • Construction Status: 97% Complete
Eroded embankment and exposed telecommunication line

Eroded embankment and exposed telecommunication line

 Eroded embankment and exposed telecommunication line

Eroded embankment and exposed telecommunication line

 Existing sacked concrete weir to be removed

Existing sacked concrete weir to be removed

 View from creek of slip out and exposed wingwall

View from creek of slip out and exposed wingwall

 688965 Biologist relocate a California Red Legged Frog outside of Project site limits

August 2022 - Biologist relocates a California Red Legged Frog outside of Project site limits

 AGI install a temporary creek diversion system and remove existing sacked concrete wall from the creek

August 2022 - AGI install a temporary creek diversion system and remove existing sacked concrete wall from the creek

 Andreini Brothers assist AGI with excavating and installing for the vegetated boulder revetment using the long reach arm excavator.

August 2022 - Andreini Brothers assist AGI with excavating and installing for the vegetated boulder revetment using the long reach arm excavator.

 Constructing the vegetated boulder revetment

August 2022 - Constructing the vegetated boulder revetment

 Constructing the vegetated boulder revetment

August 2022 - Constructing the vegetated boulder revetment
Tieback Testing November 2022Tieback Testing Tieback Placement November 2022Tieback Placement Boulder Revetment Placement for Face of Wall November 2022Boulder Revetment Placement for Face of Wall Boulder Revetment Placement for Face of Wall November 2022Boulder Revetment Placement for Face of Wall Tiebacks Placement October 2022Tiebacks Placement Rebar and Concrete Lagging for Underpinning Under Bridge October 2022Rebar and Concrete Lagging for Underpinning System Under the Bridge Concrete for Underpinning System Placed October 2022Concrete for Underpinning System Placed Backfilling Soldier Pile Wall October 2022Backfilling Soldier Pile Wall Concrete Lagging Placement September 2022Concrete Lagging Placement Soldier Pile Pier Drilling September 2022Soldier Pile Pier Drilling Soldier Pile Wall September 2022Soldier Pile Wall Soldier Piles in Concrete September 2022Soldier Piles in Concrete Wall and Existing Bridge September 2022Wall and Existing Bridge LocationMapLocation Map VicinityMapVicinity Map