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Biological Opinion Update Dry Creek Projects. David Manning Principal Environmental Specialist Sonoma County Water Agency 707-547-1988, [email protected] 12 Year Dry Creek Habitat Enhancement Requirements. Multiple Phases Multiple Goals 5 Tributary Projects

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Biological opinion update dry creek projects

Biological Opinion Update Dry Creek Projects

David Manning

Principal Environmental Specialist

Sonoma County Water Agency

707-547-1988, [email protected]


12 year dry creek habitat enhancement requirements
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



Dry creek fish habitat enhancement feasibility study
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


Fish habitat inventory
Fish Habitat Inventory

Inventory of 13.9 miles

Pools, Riffles, and Glides,

Stream Width, Stream Depth, and “Complexity”


Opportunities for fish habitat enhancement
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


Fish habitat enhancement
Fish Habitat Enhancement

Dry Creek

After

Before


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


Dry creek anadromous salmonids
Dry Creek Anadromous Salmonids

Chinook Salmon Age: 0+

Steelhead Age: 2+

Coho Salmon Age: 1+


Dry creek downstream migrant trap
Dry Creek Downstream Migrant Trap

Fish

Collection

Box

Spin

Flow


Steelhead smolts

*Captured: 228

*Estimate: no estimate

Steelhead parr

*Captured: 5,231

*Estimate: no estimate


Chinook smolts

*Captured: 21,200

*Estimate: 160,000+

Steelhead smolts

*Captured: 228

*Estimate: no estimate


Juvenile Sampling, Fall (2008 & 2009)

Snorkeling observations

Backpack electrofishing

PIT Tagging


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)



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