Lucas Valley Road MP 3.92 Embankment Repair Project

Summary

SCH Number
2020050566
Lead Agency
San Francisco Bay Regional Water Quality Control Board
Document Title
Lucas Valley Road MP 3.92 Embankment Repair Project
Document Type
NOE - Notice of Exemption
Received
Posted
5/28/2020
Project Applicant
Marin County Department of Public Works

Document Description
An unnamed, ephemeral tributary (creek) bordering the northern shoulder of Lucas Valley Rd, has experienced significant vertical incision and bank erosion due to an upward migrating head cut originating in Miller Creek. The erosion has undercut the shoulder of Lucas Valley Rd destabilizing a portion of the road. To prevent further undercutting of the road and improve user safety, the Project will install 116 feet of tangent pile wall primarily within the shoulder of Lucas Valley Road. However, 16 ft of the 116 ft of wall will be exposed along the bank of the creek where erosion has undercut the roadway. The pilings for the wall will be drilled down into the roadside shoulder area, as far from the channel as possible. An existing 18-inch corrugated metal culvert will also be replaced.

Contact Information
Joshua Hoeflich
San Francisco Bay Regional Water Quality Control Board
1515 Clay Street, Suite 1400
Oakland, CA 94612

Phone : (510) 622-2370

Location

Coordinates
38°2'18.6"N 122°36'10.1"W
Cities
San Rafael
Counties
Marin

Notice of Exemption

Exempt Status
Categorical Exemption
Type, Section or Code
15301: Existing Facilities
Reasons for Exemption
The Project will repair and rehabilitate an existing structure. Best management practices will be implemented to avoid and minimize impacts to the environment.

Attachments

Notice of Exemption
2020050566_Lucas Valley Road   PDF 358 K

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