To: Board of Supervisors
From: Warren Lai, Public Works Director/Chief Engineer
Report Title: APPROVE the Alhambra Valley Road Erosion Repair - 3 Sites Project and take related actions under CEQA
☒Recommendation of the County Administrator ☐ Recommendation of Board Committee
RECOMMENDATIONS:
APPROVE the Alhambra Valley Road Erosion Repair - 3 Sites Project (Project) and AUTHORIZE the Public Works Director, or designee, to advertise the Project, Briones area. [County Project No. 0672-6U6270 / Federal Project No. ER 15J9 (163), ER 15J9 (164), and ER 15J9 (165), DCD-CP#25-29] (District I), and
DETERMINE the Project is a California Environmental Quality Act (CEQA), Categorical Exemption, pursuant to Article 19, Section 15301(c) and 15302(c) of the CEQA Statute and Guidelines, and
DIRECT the Director of Department of Conservation and Development (DCD), or designee, to file a Notice of Exemption (NOE) with the County Clerk, and
AUTHORIZE the Public Works Director, or designee, to arrange for payment of a $50 fee to the County Clerk for filing the NOE.
FISCAL IMPACT:
Estimated Project cost: $5,720,000. 84% Federal Emergency Relief Funds, 16% Local Road Funds.
BACKGROUND:
The purpose of this project is to repair three embankment failures and reconstruct the roadway to restore two-way traffic to a stretch of Alhambra Valley Road that was damaged during the 2023 winter storm events. The road is currently limited to one lane for travel at two of the embankment failure locations.
The road embankments will be repaired and stabilized by constructing soldier pile retaining walls and reconstructing the collapsed roadway at all three sites. The damaged road pavement will also be repaired. An existing storm drain culvert crossing Alhambra Valley Road and the bank armoring at the culvert’s outfall will be replaced and repaired at the western-most site and an inlet and culvert will be installed at the eastern-most site. In addition, the repair work at all three sites will include clearing and grubbing on the embankment, excavation, and installation of rock slope protection and guardrail.
The Project is exempt from CEQA because it consists of the repair and reconstruction of an existing street at three locations and drainage system at one location, involving negligible expansion of use beyond that previously existing pursuant to Section 15301 and 15302 of the CEQA Guidelines
CONSEQUENCE OF NEGATIVE ACTION:
Delay in approving the project may result in a delay of design and construction, and may jeopardize funding. Erosion will worsen at the project sites, which might damage additional portions of the roadway causing full road closure.