The project is located at Redwood Road MPM 1.31 in Napa County. The proposed repair to the slide is drilled hole steel soldier pile concrete retaining wall approximately 90 feet long. The wall height varies from approximately 4 to 11 feet. The pier depth varies from 15 to 20 feet. The work will include:
Mobilization, Staging Area Setup, Implementation on Erosion and Sediment Control Best Management Practices (BMP), Construction Area Signs per CAMUTCD standards and Special Provisions, Temporary Traffic Control per CAMUTCD standards and Special Provisions, Grading, Excavation, Backfill, Drilled hole steel soldier pile concrete retaining wall, Drainage facilities, Pavement, Coordination for utility relocations will be required, Auxiliary work shown on the plans and as directed by engineer, All construction activities including any temporary staging shall occur within County right of way unless directed otherwise by the engineer, Final cleanup, and Project Closeout.
The project was awarded by the Board of Supervisors to Hillside Drilling on August 29, 2017 with the bid of $850,975.