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Sammamish River IAVMP Project Introduction

Sammamish River IAVMP Project Introduction. What is an IAVMP?. Integrated aquatic vegetation management plan PURPOSE: To design a cost-effective and environmentally sound aquatic plant management program Can help with funding

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Sammamish River IAVMP Project Introduction

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  1. Sammamish River IAVMP Project Introduction

  2. What is an IAVMP? Integrated aquatic vegetation management plan PURPOSE: To design a cost-effective and environmentally sound aquatic plant management program • Can help with funding • Aquatic Weeds management Fund calls for completion of an IAVMP before projects can be considered for implementation grants • May be required to get some permits RATIONALE: Issues are different in every water body • Aquatic plant communities and water uses vary • There is a range of aquatic-plant control methods • physical, mechanical, chemical, biological, cultural • these can vary widely in cost, effectiveness and environmental impacts • Make sure aquatic plant management is consistent with other management plans and stakeholder interests affecting the water body

  3. What is an IAVMP? • Multiple stakeholder interests • Salmon recovery • Flood control • Restoration • Water quality and quantity • Recreation • Noxious weed control • Multiple objectives • Important to make sure they interface with one another

  4. Define the Problem: Noxious Weeds

  5. A little backgroundWhat is a Noxious Weed? • Non-native plant that negatively impacts agriculture, habitat, human health, land values or natural resources • Defined and regulated by state law (RCW 17.10) • regulated in parts of the state where they have limited distribution • Highest priority is where weeds are just beginning to invade • List set primarily by state weed board; law enforced by county noxious weed boards • Requires property owners to prevent plants from spreading via seed or other propagule (any plant part that can form a new plant)

  6. Problem: who owns the river? • The State of Washington (WDNR) has asserted ownership of the river bed as a Water of the State downstream of Woodinville • Bank ownership is also mostly well defined downstream of Woodinville • Nobody owns the riverbed or banks where it is diked: “The Sammamish River south of Woodinville to Marymoor Park is unlikely to be an area where state ownership of the aquatic lands could be asserted.  The river morphology in this area indicates it is man made and it is managed by the King County Flood Control Drainage District # 3.”

  7. A little backgroundMore on Noxious Weeds • Class A Weeds – most limited distribution, eradication required statewide • Class B and C Weeds – wider distribution, control (prevention of spread) required where designated • Non-Designates and Weeds of Concern – locally widespread, control encouraged but not required by law

  8. Garden loosestrife Brazilian elodea Class B designated noxious weeds Purple loosestrife Common reed (Phragmites)

  9. Brazilian elodea

  10. Common reed (Phragmites)

  11. Purple loosestrife Garden loosestrife

  12. Impacts downstream… Union Bay Natural Area, UW Logboom Park, Kenmore Losing out to Brazilian elodea Juanita Bay Park, Kirkland Mercer Slough, Bellevue Luther Burbank Park, Mercer Island Eurasian water milfoil: long established in Sammamish River Inglemoor Condominiums, Kenmore Magnuson Park, Seattle

  13. Class B and C non-designated noxious weeds • Himalayan & evergreen blackberry (class C) • Reed canarygrass (class C) • Fragrant waterlily (class C) • Yellow-flag iris (class C) • Invasive knotweeds (class B) • Butterfly bush (class B) • Scotch broom (class B) • Eurasian watermilfoil (class B) • Curly-leaf pondweed (class C)

  14. Some Existing Plans and Data • Habitat Survey Sammamish River, King County, Washington: 1999 data report • Habitat Inventory and Assessment of Three Sammamish River Tributaries: North, Swamp and Little Bear Creeks, 2001 • Salmon and Steelhead Habitat Limiting Factors Report for the Cedar-Sammamish Basin(WRIA 8), 2001 • Sammamish River Corridor Action Plan, 2002 • Woodin Creek Basin Habitat Assessment, Final Report, 2004 • Sammamish River Water and Sediment Quality Assessment, King County 2005 • Final Lake Washington/Cedar/Sammamish Watershed (WRIA 8) Chinook Salmon Conservation Plan, 2005 • 2006 King County Flood Hazard Management Plan • Regulated Noxious Weed Surveys 2003, 2006, 2009 and 2010 Bothell

  15. Questions? • Katie Messick • Aquatic Weed Specialist • King County Noxious Weed Control Program • 201 S. Jackson St., Ste. 600 • Seattle WA 98104 • (206) 263-6461 • katie.messick@kingcounty.gov • www.kingcounty.gov/weeds

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