TO: Board of Supervisors
FROM: Steven Lederer, Director of Public Works
REPORT BY: Dewey Phan, Assistant Engineer
SUBJECT: Approval of Plans and Specifications and Authorization to Advertise for Bids for the “Mt. Veeder Road MPM 4.3 and MPM 3.25 Project, RDS 26-24”.
RECOMMENDATION
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Approve the Plans and Specifications for the “Mt. Veeder Road MPM 4.3 and MPM 3.25 Project, RDS 26-24” and authorization to advertise for sealed bids and opening of the bids at a time, date, and location to be published by the Director of Public Works pursuant to Section 20150.8 of the Public Contract Code. (No Fiscal Impact)
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BACKGROUND
Damage was caused to Mt. Veeder Road MPM 4.3 from the storm events occurring in Napa County in November 2025. Intense rainfall saturated the road embankment causing a downhill slide approximately 160 feet long at Mt. Veeder Road MPM 4.3 near Lokoya Road. The slide repair will include constructing a cast-in-drilled-hole (CIDH) concrete retaining wall with concrete lagging extending approximately 187 feet. The wall heights are 4 feet to 16 feet. Tiebacks will be installed to provide additional lateral support and allow for one travel lane to remain open during construction. Repaving the roadway will restore the asphalt concrete surface and pre-slide drainage patterns.
At Mt. Veeder Road 3.25, an approximately 100-foot-long area of the downslope (northbound) lane is experiencing significant slope creep and settlements. This is typically followed by a land slide in future storm events that will threaten the road. To be pro-active, and instead of building an expensive retaining wall, stitch piers are proposed to help prevent the roadway from sliding. The stitch piers are 18” in diameter and extend 20 linear feet deep into the ground.
On 3/10/25, the Board of Supervisors approved $456,986 for the design phase of the project. The Engineers estimate to repair the roadways are $1,200,000 and $362,000 for the Mt. Veeder Road MPM 4.3 and Mt. Veeder Road MPM 3.25, respectively.
Fiscal Year 2026-27 recommended budget will include $7 million for all 2025 November Storm Projects construction from the release of designation for fiscal uncertainty. It will be budgeted in RDS01 “November 2025 Storm Roads CIP.” As each project moves forward, budget will be reallocated from RDS01 to specific projects. The Plans and Specifications are complete and ready for approval by the Board of Supervisors. Staff will return to the Board of Supervisors at the time of award to present a detailed project budget based on the lowest responsible bid.
Requested Actions:
Approve Plans and Specifications for the “Mt. Veeder Road MPM 4.3 and MPM 3.25 Project, RDS 26-24” and authorization to advertise for sealed bids.
FISCAL IMPACT
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Is there a Fiscal Impact? |
No |
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Is it Mandatory or Discretionary? |
Discretionary |
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Discretionary Justification: |
Repairs are necessary to prevent further damage and ensure public safety. |
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Is the general fund affected? |
No |
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Future fiscal impact: |
Funding will be needed in FY 26-27 for permitting and construction. Permits may require mitigation planting and monitoring for up to 10 years after construction completion. |
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Consequences if not approved: |
Slides could damage more of the roadways which could potentially remove road access for residents and result in a major disruption of emergency response in the affected areas. |
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Strategic Initiative: |
Build healthy, connected communities. |
ENVIRONMENTAL IMPACT
ENVIRONMENTAL DETERMINATION: Consideration and possible adoption of a Categorical Exemption Class 1: It has been determined that this type of project does not have a significant effect on the environment and is exempt from the California Environmental Quality Act. See Class 1 (“Existing Facilities”) which may be found in the guidelines for the implementation of the California Environmental Quality Act at 14 CCR §15301; see also Napa County’s Local Procedures for Implementing the California Environmental Quality Act, Appendix B.]