The project is located at Redwood Road MPM 5.07 in Napa County. The proposed repair to the slide is drilled hole steel soldier pile concrete retaining wall approximately 360 feet long and grade beam on drilled pier concrete wall approximately 20 feet long on each end of the soldier pile wall for a total length of approximately 400 feet. The wall height varies from approximately 4 to 15 feet. The pier depth varies from 15 to 25 feet.
The project was awarded by the Board of Supervisors to Hillside Drilling, Inc. of Point Richmond, CA on August 15, 2017 with a bid of $1,823,011.