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Dry Creek Habitat Enhancement: Feasibility Study & Restoration Projects Update

Learn about the ongoing Dry Creek Projects led by David Manning, aiming for habitat enhancement and preservation along 5 tributaries in Sonoma County. The project spans 12 years and involves multiple phases to achieve various goals such as bank stabilization and flow preservation. Through feasibility studies and detailed analysis, opportunities for enhancing fish habitat have been identified, contributing to the conservation efforts of anadromous salmonids like Chinook Salmon, Steelhead, and Coho Salmon in Dry Creek. The upcoming schedule includes detailed feasibility analysis, concept designs, and pilot project implementation, aimed at enhancing fish habitat and improving the overall ecosystem health.

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Dry Creek Habitat Enhancement: Feasibility Study & Restoration Projects Update

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  1. Biological Opinion Update Dry Creek Projects David Manning Principal Environmental Specialist Sonoma County Water Agency 707-547-1988, dmanning@scwa.ca.gov

  2. 12 Year Dry Creek Habitat Enhancement Requirements • Multiple Phases • Multiple Goals • 5 Tributary Projects • 6 Total Miles of Restoration • 8 Sites (Upper, Middle, Lower) • Summer and Winter Habitat • Bank Stabilization • Flow Preservation

  3. Dry Creek Tributary Enhancement Grape Creek

  4. Dry Creek Fish Habitat Enhancement Feasibility Study Two Study Phases 1) Inventory of Current ConditionsWatershed Characteristics▪ Stream Geomorphology▪ Fish Habitat 2) Feasibility Analysis and Conceptual Design

  5. Fish Habitat Inventory Inventory of 13.9 miles Pools, Riffles, and Glides, Stream Width, Stream Depth, and “Complexity”

  6. Opportunities for Fish Habitat Enhancement ▪ Abundant opportunities for enhancement of pools, riffles, stream banks and creation of off-channel habitats ▪ All areas of interest within historic channel

  7. Fish Habitat Enhancement Dry Creek After Before

  8. Detailed Feasibility Analysis and Concept Designs ▪ System-scale feasibility ▪ Project-scale feasibilityUpcoming Schedule ▪ Spring – summer 2010: Detailed feasibility analysis ▪ Fall 2010: Concept designs and ranking of opportunities ▪ Summer 2011: Pilot project implementation Feasibility Study Next Steps

  9. Dry Creek Anadromous Salmonids Chinook Salmon Age: 0+ Steelhead Age: 2+ Coho Salmon Age: 1+

  10. Dry Creek Downstream Migrant Trap Fish Collection Box Spin Flow

  11. Steelhead smolts *Captured: 228 *Estimate: no estimate Steelhead parr *Captured: 5,231 *Estimate: no estimate

  12. Chinook smolts *Captured: 21,200 *Estimate: 160,000+ Steelhead smolts *Captured: 228 *Estimate: no estimate

  13. Juvenile Sampling, Fall (2008 & 2009) Snorkeling observations Backpack electrofishing PIT Tagging

  14. Juvenile Sampling, Fall (2008 & 2009) • Fewer juvenile steelhead in 2009 as compared to 2008 • General trend of larger steelhead downstream as compared to upstream • Differences in emigration between reaches (based on PIT tagging) MAY suggest differences in habitat quality • No coho (except for a very few in the smolt trap)

  15. Questions

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