Canyon Lane Roadway Improvements Development in Emerald Lake Hills

The proposed project involves the improvement and extension of Canyon Lane at Glenwood Avenue. The proposed improvement to Canyon Lane would involve regrading and paving the existing gravel roadway into a 20-foot-wide paved roadway, extending approximately 880 feet west from Glenwood Avenue. The project would include a turnaround for emergency vehicles and a single-span bridge that would cross the unnamed tributary that traverses the project site. The extension of Canyon Lane would provide routine and emergency access to 12 currently undeveloped privately-owned parcels. Road improvements made to Canyon Lane would result in a road grade ranging from 0.5 to 12.1 percent. 

Canyon Lane would be realigned from its current mapped, or paper street, configuration to the existing gravel access road south of Garrett Park. The realignment would eliminate any conflicts with Garret Park and coincide with an existing sewer line underlying Glenwood Avenue and Vista Drive.

A minimum eight-inch water line extending approximately 1,050 linear feet would also be constructed to connect the water mains at Glenwood Avenue and Vista Drive to provide water service and fire protection to the 12 parcels. The water line extension would require authorization and approval by the City of Redwood City and the San Mateo Local Agency Formation Commission (LAFCo), as water service would be supplied by the City of Redwood City Water Department. Stormwater would be collected at four catch basins on the south side of Canyon Lane. Stormwater would then flow towards the east into a biotreatment swale that would treat stormwater before infiltrating into groundwater. An underground electrical distribution line would underlay Canyon Lane. 

To achieve the roadway improvements, the proposed project would disturb slightly under one acre of land. The project would involve approximately 1,205 cubic yards of grading, including 1,145 cubic yards of cut and 60 cubic yards of fill. The project would include the removal of 21 existing trees, including 3 riparian coast live oak trees. 

In addition to the roadway improvements, the project would include the development of one single-family residence on two previously merged parcels (APN 057-222-290 & 300). The merged parcels that would be developed as part of the project total approximately 16,151 square feet in size.

The proposed residence would have a lot coverage of no more than 25 percent, Floor Area Ratio (FAR) of no more than 30 percent, and would comprise up to three levels, including a garage level, a main level, and an upper level. The garage would be sized to accommodate two vehicles. A driveway connecting Canyon Lane to the garage would also be constructed and would accommodate an additional two vehicles for guest parking. Construction of the residence would require approximately 2,540 cubic yards of excavation. New storm drainage facilities would be constructed that would convey water to a stormwater system that would be constructed as part of the Canyon Lane improvements.


  • December 11, 2018

    County issued Notice of Preparation of an Environmental Impact Report (EIR) and Public Scoping Meeting, see Documents Section below. A 30-day public comment period, commencing on the date of issuance, will end on January 10, 2019

  • December 18, 2018

    EIR Public Scoping Meeting held at the County of San Mateo Planning & Building Department, 455 County Center, 1st Floor, Room 101, Redwood City, CA 94063 from 6 p.m. to 8 p.m.

  • January 10, 2019

    30-day public comment period for the EIR Notice of Preparation ends. Written comments should be submitted to Summer Burlison, San Mateo County Planning & Building Department, 455 County Center, 2nd Floor, Redwood City, CA 94063.

  • September 25, 2019

    County issues Notice of Availability of a Draft EIR, see document below. A 45-day public comment period, commencing on this date of issuance, will end on November 11, 2019. Written comments must be submitted prior to the close of the public review period by regular mail, fax, or e-mail to: Summer Burlison, San Mateo County Planning and Building Department, 455 County Center, 2nd Floor, Redwood City, CA 94063; FAX: (650)363-4849, or

Case Number

PLN 2017-00010


Summer Burlison, Project Planner
(650) 363-1815

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