Sonoma Creek Bank Stabilization and Habitat Restoration

Sonoma Creek Bank Stabilization and Habitat Restoration

The project includes bank stabilization, habitat restoration, and activities to address the existing degraded conditions. The project area is a 200-foot long section of the right bank of Sonoma Creek within the property. The property will restore important habitat elements lost during the 2005-2006 flood events and stabilize the bank against future flood damage and sediment delivery to Sonoma Creek. The project will remove the existing cause of the degraded habitat conditions (i.e. damaged pipe and wire fence) and lay back the right bank at slopes varying from 1:1 to 2:1 (H:V). The 1:1 graded slopes will be protected with vegetated boulders; flatter slopes will receive biotechnical treatments (e.g., brush mattresses and heavy coir fabric planted through with willow poles). At the downstream end of the site, heavy coir fabric and brush mattresses will provide stability. Rocked slopes will have river run gravel placed in the interstitial spaces to facilitate plant establishment. Existing vegetation, including a 24" dbh alder at the downstream end of the project, will be protected to the extent possible. An existing root wad will be left in place and protected during construction. Four more root wads will be placed along the toe of the repair to provide enhanced wildlife habitat values. The California Department of Fish and Game is executing a Lake and Streambed Alteration Agreement Number 1600-2008-0117-3 pursuant to Section 1602 of the Fish and Game Code to the project Applicant, Mr. Doug Wilson.

Sonoma