Sonoma Resource Conservation District

Jenner Gulch and Sheephouse Creek

Jenner Gulch

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Watershed Overview

Current & Past RCD Programs:

Planning

  • The Jenner Headlands Sediment Source Assessment was completed by the RCD in 2011 which assessed 48.4 miles of road in the preserve for point sources of erosion. This study resulted in a sediment reduction plan for the entire Jenner Headlands property. The Wildlands Conservancy has implemented some sections of the plan on their own, in addition to the RCD’s road project in the Sheephouse Watershed, and is pursing funding to implement the other sections of the plan in the future.

 

On-the-Ground Projects

  • Through the RCD’s Rural Road Improvement Program road assessments and erosion decreasing improvement plans have been completed thoughout the watershed. The Sheephouse Creek Sediment Source Assessment was completed in 2011 by assessing 30 miles of road within the Sheephouse Creek watershed for point sources of erosion with connectivity to the stream network. Aa a result of this assessment, a sediment reduction plan was developed and proposaed for funding. The Sheephouse Creek Sediment Source Reduction Project is slated for Summer 2013 implementation and the sediment reduction plan will prevent over 13,000 cubic yards of fine sediment from entering Sheephouse Creek and its tributaries over the next decade. The Jenner Headlands Sediment Source Assessment completed by the RCD in 2011 which assessed 35 miles of road in the preserve for point sources of erosion. This study resulted in a sediment reduction plan for the entire Jenner Headlands property.

 

Water Resources Management

  • The Jenner Headlands Physical and Biological Stream Assessment and Monitoring project was completed in 2011. 1000 ft of Jenner Gulch was surveyed by Sonoma RCD staff for habitat quality. Parameters included: canopy coverage, pebble counts, woody debris volume measurements, cross-section and thalweg surveys, pool and riffle. measurements, and benthic macro-invertebrate surveys.

 

  • Sheephouse Creek Sediment Source Reduction Project was funded for implementation from California Department of Fish and Game with match funds from Sonoma Land Trust and materials matches from local landowners in 2012. Construction efforts for the Project were completed over three seasons between September 2012 and October 2014 where almost 7 miles of hydrologically connected roads were upgraded and another 2 miles were decommissioned. Sediment delivery features treated with specific erosion control measures included: 71 stream crossings, 2 bank erosion locations, 7 ditch relief culverts, 6 landslide/slope instability features, 7 road surface discharge points and 1 spring. The work is estimated to reduce potential impacts to Sheephouse Creek and its tributaries by reducing over 13,000 yd3 of sediment delivery. This project provided a unique opportunity to treat virtually an entire watershed with one “storm-proofing” project.

Links to other important organizations in the watershed:

Sonoma Land Trust
Sonoma County Agricultural Preservation and Open Space District
UC Cooperative Extensions
CA Sea Grant
California Department of Fish and Game
The Wildlands Conservancy

For more information about the Jenner Gulch or Sheephouse Creek watersheds, please contact Kevin Cullinen at 707.569.1448 ext 103 or kcullinen@sonomarcd.org.