White Hall Lane Bridges Repair Project, RDS 20-31 & RDS 20-32

Project Scope

This project consists of repairing the stone masonry arch bridges on Whitehall Lane near Mile Post Markers 0.6 and 0.9 (from Highway 29) between Rutherford and the City of St. Helena.  The 2014 South Napa Earthquake damaged the barrier rails and headwalls of the 10-foot long by 24-foot wide bridge at MPM 0.6 and the 16-foot long by 17-foot wide bridge at MPM 0.9.  The work at MPM 0.6 includes repairing barrier rails, replacing stones, and pressure grouting the headwalls.  The project at MPM 0.9 includes repairing barrier rails and pressure grouting the headwalls.  One lane traffic control is required during construction.  The Engineer estimate is $65,000.


Contractor shall possess a Class "A"  or C-29 License at the time of contract award.  

Bid Documents

The project Plans and Specifications are available to view or download. The bidder's list has been added. Addendum 1 has been posted. The bid opening was Thursday, August 18 at 11:30 AM. The 3 sublists have been posted. The project was awarded by the Board of Supervisors on September 13, 2022 to Ashron Construction of Galt, CA for their low base bid.

ContractorTotal Base Bid of RDS 20-31 & 20-32
Ashron Construction and Restoration - Galt, CA  $55,000.00
Bridgeway Civil Constructors - Vacaville, CA  $95,600.00
Rainbow Waterproofing - San Francisco, CA  $99,320.00
Giampolini & Co. - Emeryville, CA$322,569.00