Sammamish River IAVMP Project Introduction What is an

Sammamish River IAVMP Project Introduction What is an

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 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 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

Define the Problem: Noxious Weeds A little background What 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) 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. A little background More 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 Garden loosestrife Brazilian elodea Class B designated noxious weeds Purple loosestrife Common reed (Phragmites) 522 522 le Ll iettB L itt B WWo oo od di ni nv vi li ll el e S S a a r R i v ve e r i h is h R am is m am m m

m Kenmore Kenmore ea r e aC ree k rC reek NE BOTHEL L WAY NE BOTHEL L WAY BB oo t ht h ee l ll l North C re North C ek re ek re ek pC am ek Sw mp Cre a Sw Brazilian

elodea n gto n hin Was gto Lake hin Was Lake 405 405 NE 145TH ST NE 145TH ST NE 124TH ST NE 124TH ST Redmond Redmond ee k NE 90TH ST NE 90TH ST NE R EDM O ND NE R WAY ED M O ND WAY

re e kr Bi g Be ar C Big Be ar C 520 520 Marymoor Park Marymoor Park Lk. L Sk a. m m . Samm. Garden loosestrife Legend !( !( Garden loosestrife and Purple loosestrife distribution 20102010 Brazilian elodea distribution Purple loosestrife Brazilian elodea

Major roads Majorstreams roads Major Major streams Cities Not Yet Surveyed Cities 0.4 0.2 0 0.4 0.2 0 / 148TH AVE NE 148TH AVE NE Legend !( 0.4 0.8 1.2 1.6 Miles 0.4 0.8 1.2 1.6 Miles rC ^ L WAY

ree k re ek 522 ea Cree k mp NE BOTHEL Bothell North C a Sw Common reed (Phragmites) L i tt le S a m Kenmore B Woodinville m

am is n gto hin Was Lake 405 h NE 145TH ST r Rive NE 124TH ST Redmond NE 90TH ST DM O ND W AY re ek NE R E Big Be ar C

520 Marymoor Park Legend ^ Sammamish River Phragmites 2010 Phragmites (common reed) Major roads Major streams Cities 148TH AVE NE Lk. Samm. 0.4 0.2 0 / 0.4 0.8 1.2 1.6 Miles rC

L WAY ree k ek 522 ea reek pC am NE BOTHEL Bothell North C re Sw Purple loosestrife L i tt le S m am 405 is

ton hing Was Lake NE 145TH ST h r Rive NE 124TH ST Redmond NE 90TH ST DMO ND W AY re ek NE R E Bi g Be ar C 520 Marymoor Park Lk. Samm.

Legend !( !( Garden loosestrife Garden loosestrife and Purple loosestrife distribution 2010 Purple loosestrife Major roads Major streams Cities Not Yet Surveyed 0.4 0.2 0 / 0.4 0.8 148TH AVE NE Garden loosestrife a m Kenmore B Woodinville 1.2 1.6 Miles

Impacts downstream Logboom Park, Kenmore Juanita Bay Park, Kirkland Luther Burbank Park, Mercer Island Eurasian water milfoil: long established Magnuson Park, in Seattle Sammamish River Union Bay Natural Area, UW Losing out to Brazilian elodea Mercer Slough, Bellevue Inglemoor Condominiums, Kenmore 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) 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 Bothell 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 Questions? Katie Messick Aquatic Weed Specialist King County Noxious Weed Control Program 201 S. Jackson St., Ste. 600 Seattle WA 98104 (206) 263-6461 [email protected] www.kingcounty.gov/weeds

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