Please report Potholes and other road issues to Sonoma County Transportation and Public Works via their reporting tool: SoCoReportIt - https://sonomacounty.ca.gov/Services/SoCo-Report-It/Submit-a-Service-Request/.
You can report road issues and a variety of other issues to the county. Smartphone Apps are also available to ease the reporting process. We've actually seen repairs and other short term fixes made after the issue was reported through this tool. Give it a try.