Gazos Creek Road- Emergency Road Repairs


SCH Number
Public Agency
San Mateo County
Document Title
Gazos Creek Road- Emergency Road Repairs
Document Type
NOE - Notice of Exemption
Document Description
In response to the winter 2022-2023 storms, the County of San Mateo Department of Public Works plans to conduct emergency road repairs on Gazos Creek Road In unincorporated San Mateo County. At Location 1, Gazos Creek Road has a sink hole In the road. Road repair will consist of trenching a 21 ft. by 9 ft. area of road, backfilling with base rock, compacting, and repaving the road. At Location 2, a 41 ft. by 13 ft. slip-out along Gazos Creek Road will be repaired. The eroded area at the slip-out will be reconstructed with a vegetated rock slope protection structure comprised of rock, back-filled, capped with soil, and revegetated. Following construction of the bioengineered slope, the repair would be covered with several Inches of soil, seeded, covered with sterile rice straw, and covered with an erosion control blanket. Location 1 Is located adjacent to Slate Creek and mainstem Gazes Creek is located 150 feet downstream. Location 2 is approximately 20 feet from Gazos Creek. In both locations, work will not extend Into the active channel. Dewatering Is not needed. Project activities would occur In the following sequence: biological survey, best management practice (BMP) Implementation, equipment staging, slip-out repair, erosion control, and vegetation restoration. For the duration of the emergency repair work, materials and equipment will be positioned on the paved roadway and shoulder. Equipment used to complete the repair will Include personal vehicles, Gradall, compaction equipment, and dump trucks. Post-construction erosion control BMPs will be installed to conserve soil resources and protect water quality. Equipment access to the creek will not be required. Field personnel will access the edge of slip -out by foot to Install water quality protection measures such as wattles or silt fencing. All disturbed areas will be seeded with native seed, covered with sterile rice straw, and covered with natural fiber jute netting. Work will be conducted using best management practices detailed In the County of San Mateo Routine Maintenance Program Manual. A biologist will be onsite to monitor all work. Project activities are planned for Summer 2023. The work Is expected to take approximately 1 week to complete.

Contact Information

Khoa Vo
Agency Name
County of San Mateo
Job Title
Deputy Director- Road Services
Contact Types
Lead/Public Agency / Project Applicant


San Mateo
San Francisco Bay Area
Cross Streets
Gazos Creek Road
Total Acres
State Highways
Highway 1

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 road facilities damaged by storm.
County Clerk
San Mateo


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