Old La Honda Road Emergency Slip-out Repair Project


SCH Number
Public Agency
San Mateo County Department of Public Works
Document Title
Old La Honda Road Emergency Slip-out Repair Project
Document Type
NOE - Notice of Exemption
Document Description
On January 4, 2023, Governor Gavin Newsom proclaimed a state of emergency throughout the State of California to support the response to historic rain and flooding. Heavy rains saturated slopes and triggered a road slip-out on Old La Honda Road that requires immediate repair. Emergency repair work will consist of stabilization of the slope with soil nails and a shotcrete wall and reconstruction of the roadway with soil lifts and a concrete block facing wall. A metal beam guardrail will be installed. Vegetation removal within the project area will be limited to the minimum necessary to complete the repair. Post-construction erosion control BMPs will be installed to conserve soil resources and protect water quality. All temporary surface disturbances will be seeded with native plants. All project activities will be conducted in accordance with BMPs, and protection measures specified in the County of San Mateo Routine Maintenance Program (RMP) 2023 Manual: Table 9-1 and Appendix A, Routine Maintenance Standards BMPs and San Mateo Countywide Water Pollution Prevention Program Construction BMPs (2014).

Contact Information

Mark Chow
Agency Name
County of San Mateo Department of Public Works
Job Title
Principal Civil Engineer
Contact Types
Lead/Public Agency / Project Applicant


San Mateo
San Francisco Bay Area, Unincorporated
Cross Streets
Old La Honda Road
State Highways
Between Highway 35 & Highway 84
Other Location Info
Old La Honda Road approximately 1.0 miles west of the intersection with HWY 35 in unincorporated San Mateo County

Notice of Exemption

Exempt Status
Emergency Project
Type, Section or Code
Sec. 21080(b)(4); 15269(b)(c)
Reasons for Exemption
Project undertaken by a public agency to repair existing facilities damaged by storm.
County Clerk
San Mateo


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