Section 401 Water Quality Certification Public Notice

Slip-Out Repair And Bank Stabilization Near 1780 Higgins Canyon Road Project


The San Francisco Regional Water Quality Control Board is currently reviewing an application for the following project for water quality certification under Section 401 of the Clean Water Act. We encourage public comments on the proposed work, which will be considered in the decision on certification. You may submit comments on this project to the staff member below.


Project Name:

Slip-Out Repair And Bank Stabilization Near 1780 Higgins Canyon Road Project
City/County:

Unincorporated, San Mateo County
Comment Period:

12/17/2024 - 1/6/2025
Project Description:

The County of San Mateo Department of Public Works (County) is proposing the Slip-Out Repair and Bank Stabilization Near 1780 Higgins Canyon Road Project (project), which would repair the damaged road and restore the bed and failed bank of Mills Creek. Landslides occurred in 2021 and 2022 and then worsened in 2023 near 1780 Higgins Canyon Road in unincorporated San Mateo County near the city of Half Moon Bay, California. The landslide area is approximately 115 feet long and extends downslope from the road surface approximately 28 feet. The landslide was likely due to the saturated slope materials in combination with erosion from elevated creek flows. The landslide has resulted in 12 to 24 inches of pavement failure along the outboard shoulder of the roadway. This repair project is necessary to protect public safety as this road is used as a mode of transportation in the area and safe access for cars and pedestrians is required. The proposed action seeks to perform the necessary bank repair, restore the channel to its original flowpath, and plant native vegetation to reduce future erosion.
Project Files:

Contact Staff for files
Staff Contact:

Elizabeth Morrison
(510) 622-2330
Water Quality Control Board
1515 Clay Street, Ste 1400
Oakland, CA 94612