CDP_2019-0034 Navarro Drainage


SCH Number
Public Agency
Mendocino County
Document Title
CDP_2019-0034 Navarro Drainage
Document Type
NOE - Notice of Exemption
Document Description
Notice of Exemption for Standard Coastal Development Permit to upgrade and repair approximately 0.1 miles of State Route (SR) 1 by relocating the drainage system to the natural channel, repairing failed roadway embankment side-slopes and the embankment adjacent to an existing private driveway, improving the roadway geometry and increase the roadway travel lanes to 12 feet wide each and increasing paved shoulders to 4 feet wide within the project limits.

Contact Information

Julia Krog
Agency Name
Mendocino County PBS
Job Title
Contact Types
Lead/Public Agency


Northern California, Unincorporated
Cross Streets
Navarro Ridge Road and State Route 1
State Highways
Pacific Ocean / Navarro River
Other Location Info
Within the Coastal Zone along State Route 1 near its intersection with Navarro Ridge Road (County Road 518), between postmiles 42.35 and 42.45.

Notice of Exemption

Exempt Status
Categorical Exemption
Type, Section or Code
Class 1(d), Section 15301(d)
Reasons for Exemption
The project is for restoration of an existing failing culvert and correction to the erosion that is currently threatening State Route 1. The project materials document erosion occurring below culvert outlets within the project area and, consistent with the class 1(d) exemption, provides for the rehabilitation of the drainage facilities and in turn the roadway prism to meet current public health and safety standards. None of the exceptions to Categorical Exemptions provided in CEQA guidelines section 15300.2(b) through (f) are application to the subject project. There are no cumulative impacts of successive projects of the same type in the same place, over time that result in significant environmental effects. There have been emergency repairs and regular maintenance conducted to this drainage system and section of State Route 1 over the years but County staff is not aware of a project in this location that was the same type and over time results in significant environmental effects. There are not unusual circumstances related to the project site such that the activity may have a significant effect on the environment, as detailed in the numerous studies prepared for this project. State Route 1 is not an officially designated state scenic highway. The site is not a hazardous waste site on any list compiled pursuant to Section 65962.5 of the Government Code. The project will not result in a substantial adverse change to the significance of any historical resource within the project area, as documented by the response from the Sonoma State University Northwest Information Center on August 30, 2021. Conditions of approval were adopted by the Mendocino County Coastal Permit Administrator requiring that the project implementation be consistent with the recommended BMPs and avoidance and minimization measures outlined in Sections 1.2, 1.3, and 3.5 of the ESHA Assessment, July 2019, Section 1.4 of the Natural Environment Study, July 2017, and Sections 4 through 8 of the Revegetation Plan intended to protect ESHA.
County Clerk


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