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Watershed Health

Flooding on Green Valley Road

Gold Ridge RCD has been working with the community to identify a solution to the chronic flooding of Green Valley Creek across Green Valley Road just outside Graton, CA. Local organizations have conducted and presented studies of the causes of flooding and potential short- and long-term solutions. Gold Ridge RCD will not be funding or managing flood mitigation projects; instead, it has played a role in facilitating the research and development of mitigation solutions.

If you would like to receive email updates regarding Green Valley Road flooding, use this link to email Sierra Cantor, and title the email subject: "Request for Updates on Green Valley Rd Flooding".

Emergency Public Meeting

What: Urgent meeting regarding emergency actions to address the flooding of Green Valley Creek at Green Valley Road (aka the “S curve”)

When: Friday, February 10, 2017 at 4:00 pm

Where: The Sanchietti barn, 10076 Green Valley Road, at the corner of Sullivan Road

READ THE MEETING NOTES here

READ THE PRESS RELEASE COVERAGE OF THE MEETING: "An emergency repair project to divert Green Valley Creek from flowing over Green Valley Road has been temporarily delayed. The project, which was slated to begin today, will begin as soon as the Sonoma County Water Agency obtains an Incidental Take Permit from the California Department of Fish and Wildlife..." Read more here.

READ THE INITIAL PRESS RELEASE: "In response to recent flooding, the Gold Ridge Resource Conservation District (RCD), the Sonoma County Department of Transportation and Public Works (TPW), and the Sonoma County Water Agency (Water Agency) are working on an emergency repair that will begin on Tuesday, February 14. A community meeting will be held at 4 p.m., Friday, February 10, at the Sanchietti barn, 10076 Green Valley Road, at the corner of Sullivan Road, to describe the project to neighbors..." Read more here.

 

Past Public Meetings

A public meeting was held on November 17th, 5:30-6:45pm at the Oak Grove Elementary School Gymnasium, 8760 Bower St., Sebastopol, CA. This meeting was a follow up to our first public meeting on October 14, 2015, and an opportunity to hear about the progress made since we last met.

See the flyer for this event.

Presentation Files:

Introduction by Gold Ridge RCD

Flood Zones Map, prepared by Sonoma County Water Agency

Flooding at Green Valley Road and Analysis of Mitigation Alternatives, presented by O'Connor Environmental, Inc.

 

Videos of Green Valley Creek Flooding on Green Valley Road

See timelapse videography of Green Valley Creek flooding across Green Valley Road from January and February 2017 on our YouTube channel.

 

Information on Green Valley Road Flooding and Efforts to Mitigate

All titles are links to the documents.

Summary of Mitigation Alternatives for Flooding at Green Valley Road, 2016: This document summarizes four project alternatives (or options), from which a preferred alternative was selected. We will discuss these options at the November 17 meeting.

Matrix of Mitigation Alternatives for Flooding at Green Valley Road, 2016: A quick reference sheet that abbreviates the alternatives (or options) outlined in the “Summary of Mitigation Alternatives for Flooding at Green Valley Road, 2016” (above).

Summary of Analysis of Flooding at Green Valley Road and Mitigation Alternatives, 2015: A previous version of and precursor to the “Summary of Mitigation Alternatives for Flooding at Green Valley Road, 2016” (above), this document includes a number of previously considered project alternatives, most of which were not pursued because they were either ineffective or not feasible.

Sediment Source Assessment for Upper Green Valley Creek, 2014: A separate but related study on the sources and rates of erosion and sedimentation in the Green Valley Creek watershed.

Green Valley Creek /Dutch Bill Creek Watersheds Update Report, 2015: This document summarizes the results of a hydrologic study of the Green Valley Creek watershed. It is more focused on low-flow conditions.

Green Valley Road Flooding Public Meeting flyer, 2015: Flier for the community meeting held last year.

 

Learn More

You can learn more about Green Valley Creek and the natural resource conservation efforts being made there by visiting its watershed page on the Gold Ridge RCD website.

For more information about efforts to mitigate flooding on Green Valley Road, please contact Sierra Cantor at Sierra@GoldRidgeRCD.org, or (707) 823-5244.

© 2016 GRRCD 2776 Sullivan Rd., Sebastopol, CA 95472. All rights reserved.