TO: Board of Supervisors
FROM: Steve Lederer, Director of Public Works
REPORT BY: Roberto De La Torre Real, Junior Engineer
SUBJECT: Project Creation, approval of Professional Service Agreements with ADKO Inc., and Budget Amendment for the Redwood Rd MPM 5.41, RDS 26-22, the Mt. Veeder Rd MPM 4.3, RDS 26-24, the Diamond Mountain Rd Slide Repair, RDS 26-39, the White Sulphur Spring Rd Slide Repair, RDS 26-37, and the 550 Wall Road Landslide Repairs, RDS 26-38.
RECOMMENDATION
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Approve the creation of "Redwood Rd MPM 5.41, RDS 26-22" (Project 26023), "Mt. Veeder Rd MPM 4.3, RDS 26-24" (Project 26024), "Diamond Mountain Rd Slide Repair, RDS 26-29" (Project 26026), "White Sulphur Spring Rd Slide Repair, RDS 26-37" (Project 26027), and "550 Wall Rd Landslide Repair, RDS 26-38" (Project 26028); Approve and authorize Agreement No. 260285B for a contract maximum of $224,594, Agreement No. 260286B for a contract maximum of $376,986, Agreement 260303B for a contract maximum of $19,507, Agreement No. 260300B for a contract maximum of $366,922, and Agreement No. 260302B for a contract maximum of $319,389 with ADKO Engineering Inc. for the five projects; and approve a Budget Amendment. (Fiscal Impact: $1,707,891 Expense; Roads Operations Budget; Not Budgeted; Discretionary)
[4/5 vote required]
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BACKGROUND
During the storm events that started in December of 2025, significant damage occurred at the following locations in unincorporated Napa County:
RDS 26-22, Redwood Road MPM 5.41, Project 26023, Agreement 260285B
RDS 26-24, Mt. Veeder Road MPM 4.3, Project 26024, Agreement 260286B
RDS 26-37, 3260 White Sulphur Spring Road, Project 26027, Agreement 260300B
RDS 26-38, 500 Wall Road, Project 26028, Agreement 260302B
RDS 26-39, Diamond Mountain Road MPM 2.0, Project 26026, Agreement 260303B
Redwood Rd MPM 5.41 and Mt. Veeder Rd MPM 4.3 sustained road and bank failure consisting of downslope failure on the side of the roadway, where a portion o...
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