Silverado Trail MPM 18.04, RDS 18-17

2017 Storm Damage Repair - Retaining Wall 

County Project #S7114-31140 DAF #PMP-NAPCO-001-0


  • Status: Complete
  • Contact: Jim Reese
  • Publish Date: March 27, 2019

Project Scope

This project is located at Silverado Trail MPM 18.04 in Napa County.  The proposed repair to the slide is a drilled hole steel soldier pile concrete retaining wall approximate 280’ long.  The wall height varies from approximately 5’ to 23’.


Contractor shall possess a Class "A" License at the time of contract award.  The Engineer’s Construction estimate for this project is $2,000,000.

Bid Documents

The Bid Documents may be obtained at said office by prospective bidders, for a fee of ten ($10) per CD, which fee is not refundable.

Job Walk location: Silverado Trail Mile Post at intersection with Pratt Avenue. Please enter Pratt Avenue from Highway 29 just north of St. Helena and drive to Silverado Trail and park just before the bridge.  The project was awarded on May 21, 2019 by the Board of Supervisors to McCullough Construction Inc. of Arcata.  The bid tabulation has been posted.  The project is complete


Contractor Location Total Base Bid
McCullough Construction Arcata, CA $1,921,283.65
Granite Construction Ukiah, CA $1,994,995.00
Maggiora & Ghilotti San Rafael, CA $2, 067,067.00
Valentine Corporation San Rafael, CA $2,262,369.00
Gordon N Ball, Inc. Alamo, CA $2,377,242.00
Ghilotti Construction Santa Rosa, CA $2,400,572.00
Team Ghilotti Petaluma, CA $2,551,667.24