HomeMy WebLinkAboutContractThislicense/permissionismadeon,2023betweentheCityofRenton(City),aWashingtonMunicipalCorporationandKingCounty(County)WHEREAS,TheHealthyLandsProject(HeLP),actingthroughtheKingCountyNoxiousWeedControlProgram(KCNWCP),providesinvasiveweedcontrolandstewardshipassistancetokeepopenspacehealthyforpeopleandtheenvironment,andWHEREAS,theCityofRentonhasaccesstotheHealthyLandsProjectduetoasuccessfulapplicationtotheConservationFuturesGrantProgramfortheMayCreekFawcettROFRproperty,andNOWTHEREFORE,theCityofRentongivesaspeciallicenseandpermission(LICENSE/PERMISSION)toKINGCOUNTYandtheircontractors,actingthroughtheKingCountyNoxiousWeedControlProgram(KCNWCP),tofundremovalandtreatinvasiveweedsalongtheMayCreekGreenwaywithinRentoncitylimitsonthefollowingtermsandconditions:1.Scope,TermandDurationofKINGCOUNTYProjectlicenseandpermission:A.Scope1.KINGCOUNTYwillprovideatnochargetotheCityinvasiveweedcontrolintheMayCreekGreenwayareawithinRentoncitylimitspursuanttothescopeofworkasoutlinedbytheattachedWeedPrescriptionPlan(EXHIBITA).2.Inaddition,theCITYgivespermissiontoKINGCOUNTYanditscontractors,actingthroughtheKCNWP,toaccesstheprojectsiteareaasoutlinedintheattachedWeedPrescriptionPlan(EXHIBITA).TheKCNWPwillgiveadvancenoticebeforeenteringproperty.B.Term-DurationofLICENSE/PERMISSION.March15,2023toDecember31,2029.LICENSE/PERMISSIONFORKINGCOUNTYHEALTHYLANDSPROJECTTOFUNDANDPROVIDEINVASIVEWEEDCONTROLALONGMAYCREEKFORPUBLICPROPERTYLOCATEDINRENTONI March 8 CAG-23-107
C.CompliancewithLawsKINGCOUNTYisresponsibletobeawareofandincompliancewithallfederal,stateandlocallawsandregulationsthatmayaffectthesatisfactorycompletionoftheproject,whichincludesbutisnotlimitedtofairlaborlawsandworker’scompensation.Anyapplicationofherbicidesshallbeperformedbylicensedapplicatorincompliancewithalllawsandregulations.2.CancellationPolicy:TheCITYhastherighttocancelthisLICENSE/PERMISSIONforanyreason.3.RecordMaintenance:KINGCOUNTYshallmaintainrecordsgeneratedrelatingtothisLICENSE!PERMISSIONandretainsuchrecordsforaslongasmayberequiredbyapplicableWashingtonStaterecordsretentionlaws,butinanyeventnolessthansixyearsaftertheterminationofthislicense/permission.KINGCOUNTYagreestoprovideaccesstoandcopiesofanyrecordsrelatedtothisLICENSE/PERMISSIONasrequiredbylawand/ortocomplywiththeWashingtonStatePublicRecordsAct(Chapter42.56RCW).Theprovisionsofthissectionshallsurvivetheexpirationorterminationofthislicense/permission.4.PublicRecordsCompliance:TothefullextenttheCITYdeterminesnecessarytocomplywiththeWashingtonStatePublicRecordsAct,KINGCOUNTYshallmakeaduediligentsearchofallrecordsinitspossessionorcontrolrelatingtothislicense/permission,including,butnotlimitedto,email,correspondence,notes,savedtelephonemessages,recordings,photos,ordrawingsandprovidethemtotheCITYforproduction.IntheeventKINGCOUNTYbelievessaidrecordsneedtobeprotectedfromdisclosure,itmay,atKINGCOUNTY’sownexpense,seekjudicialprotection.KINGCOUNTYshallindemnify,defend,andholdharmlesstheCITYforallcosts,includingattorneys’fees,attendanttoanyclaimorlitigationrelatedtoaPublicRecordsActrequestforwhichKINGCOUNTYhasresponsiverecordsandforwhichKINGCOUNTYhaswithheldrecordsorinformationcontainedtherein,ornotprovidedthemtotheCITYinatimelymanner.KINGCOUNTYshallproducefordistributionanyandallrecordsresponsivetothePublicRecordsActrequestinatimelymanner,unlessthoserecordsareprotectedbycourtorder.TheprovisionsofthissectionshallsurvivetheexpirationorterminationofthisLICENSE/PERMISSION.5.IndependentRelationship:ThenatureoftherelationshipbetweenKINGCOUNTYandtheCITYwithrespecttothisLICENSE/PERMISSIONduringtheperiodofthisLICENSE/PERMISSIONshallbethatofindependententitiesandparties.NoKINGCOUNTY,agent,employee,representative,orcontractororsubcontractorofKINGCOUNTYshallbe,orshallbedeemedtobe,thecontractor,employee,agent,representative,orsubcontractoroftheCITY.NeitherKINGCOUNTYnoranycontractor,employee,agent,representative,orsubcontractorofKINGCOUNTYshallbeentitledtoanybenefitsaccordedCityemployeesbyvirtueoftheservicesprovidedunderthisLICENSE/PERMISSION.KINGCOUNTYshallberesponsibleforpayingallapplicabletaxesincludingincomeandbusinesstaxes.2
6.HoldHarmless:KINGCOUNTYagreestorelease,indemnify,defend,andholdharmlesstheCITY,electedofficials,employees,officers,representatives,andvolunteersfromanyandallclaims,demands,actions,suits,causesofaction,arbitrations,mediations,proceedings,judgments,awards,injuries,damages,liabilities,taxes,losses,fines,fees,penalties,expenses,attorney’sorattorneys’fees,costs,and/orlitigationexpensestoorbyanyandallpersonsorentities,arisingfrom,resultingfrom,orrelatedtothenegligentacts,errorsoromissionsofKINGCOUNTYunderthisLICENSE/PERMISSION,exceptforthatportionoftheclaimscausedbytheCITY’ssolenegligence.ShouldacourtofcompetentjurisdictiondeterminethatthisLICENSE/PERMISSIONissubjecttoRCW4.24.115,(ValidityofLICENSE/PERMISSIONtoindemnifyagainstliabilityfornegligencerelativetoconstruction,alteration,improvement,etc.,ofstructureorimprovementattachedtorealestate...)then,intheeventofliabilityfordamagesarisingoutofbodilyinjurytopersonsordamagestopropertycausedbyorresultingfromtheconcurrentnegligenceofKINGCOUNTYandtheCITY,itsofficers,officials,employeesandvolunteers,KINGCOUNTY‘sliabilityshallbeonlytotheextentofKINGCOUNTY‘snegligence.ItisfurtherspecificallyandexpresslyunderstoodthattheindemnificationprovidedinthisLICENSE/PERMISSIONconstituteKINGCOUNTY’swaiverofimmunityundertheIndustrialInsuranceAct,RCWTitle51,solelyforthepurposesofthisindemnification.ThePartieshavemutuallynegotiatedandagreedtothiswaiver.TheprovisionsofthissectionshallsurvivetheexpirationorterminationofthisLICENSE/PERMISSION.7.DiscriminationProhibited:InitsperformanceunderthisLICENSE/PERMISSION,KINGCOUNTYshallnotdiscriminateonthebasisofrace,color,sex,religion,nationality,creed,maritalstatus,sexualorientationorpreference,age(exceptminimumageandretirementprovisions),honorablydischargedveteranormilitarystatus,orthepresenceofanysensory,mentalorphysicalhandicap,unlessbaseduponabonafideoccupationalqualificationinrelationshiptohiringandemployment,inemploymentorapplicationforemployment,theadministrationofLICENSE/PERMISSIONoranyotherbenefitsunderthisLICENSE/PERMISSION,orprocurementofmaterialsorsupplies.8.Insurance:A.TheCityrecognizesthatKingCountyisselfinsured.KINGCOUNTYshallmaintainequivalentcoverageinthefollowingminimumamountsandsecureandmaintainfromitsContractors/Subcontractors:1.CommercialGeneralLiabilityinsurancewithminimumpolicylimitsof$1,000,000foreachoccurrence/$2,000,000aggregatefortheTermofthisLICENSE/PERMISSION.3
2.ProfessionalLiabilityinsurancewithminimumpolicylimitsof$1,000,000foreachoccurrence,shallalsobesecuredforanyprofessionalservicesbeingprovidedthatareexcludedinthecommercialgeneralliabilityinsurance.3.CommercialAutoLiabilityinsurancewithminimumpolicylimitsof$1,000,000combinedsinglelimitisrequiredifacommercialvehiclewillbeusedinperformanceofworkorfordeliveryofproducts,beyondnormalcommutes.4.Workers’Compensationcoverage,asrequiredbytheIndustrialInsurancelawsoftheStateofWashington.5.PollutionLiabilityinsurancewithminimumpolicylimitsof$1,000,000foreachoccurrence,whenworkunderthisLICENSE/PERMISSIONinvolvesapollutionrisktotheenvironment.Pollutioncoveragemaybeincludedinthegeneralliabilitypolicy.6.UmbrellaorExcessLiabilityinsurancemaybeusedtoreachminimumrequiredcoveragelimits.8.OtherProvisions:A.ApprovalAuthority.EachindividualexecutingthisLICENSE/PERMISSIONonbehalfoftheCITYandKINGCOUNTYrepresentsandwarrantsthatsuchindividualsaredulyauthorizedtoexecuteanddeliverthisLICENSE/PERMISSIONonbehalfoftheCITYorKINGCOUNTY.B.AmendmentandModification.ThisLICENSE/PERMISSIONmaybeamendedonlybyaninstrumentinwriting,dulyexecutedbybothParties.C.Conflicts.Anyexhibits/attachmentstothisLICENSE/PERMISSIONareincorporatedbyreferenceonlytotheextentofthepurposeforwhichtheyarereferencedwithinthisLICENSE/PERMISSION.TotheextentaKINGCOUNTY-preparedexhibitconflictswiththetermsinthebodyofthisLICENSE/PERMISSIONorcontainstermsthatareextraneoustothepurposeforwhichitisreferenced,thetermsinthebodyofthisLICENSE/PERMISSIONshallprevailandtheextraneoustermsshallnotbeincorporatedherein.D.GoverningLaw.ThisLICENSE/PERMISSIONshallbemadeinandshallbegovernedbyandinterpretedinaccordancewiththelawsoftheStateofWashingtonandtheCityofRenton.KINGCOUNTYandalloftheKINGCOUNTY’semployeesshallperformthisLICENSE/PERMISSIONinaccordancewithallapplicablefederal,state,countyandcitylaws,codesandordinances.E.JointDraftingEffort.ThisLICENSE/PERMISSIONshallbeconsideredforallpurposesaspreparedbythejointeffortsofthePartiesandshallnotbeconstruedagainstoneortheotherasaresultofthepreparation,substitution,submissionorothereventofnegotiation,draftingorexecution.4
F.JurisdictionandVenue.AnylawsuitorlegalactionbroughtbyanyPartytoenforceorinterpretthisLICENSEIPERMISSIONoranyofitstermsorcovenantsshallbebroughtintheKingCountySuperiorCourtfortheStateofWashingtonattheMalengRegionalJusticeCenterinKent,KingCounty,Washington,oritsreplacementorsuccessor.G.Severability.Acourtofcompetentjurisdiction’sdeterminationthatanyprovisionorpartofthisLICENSEIPERMISSIONisillegalorunenforceableshallnotcancelorinvalidatetheremainderofthisLICENSEIPERMISSION,whichshallremaininfullforceandeffect.H.SoleandEntireLICENSE/PERMISSION.ThisLICENSE/PERMISSIONcontainstheent1reLICENSE/PERMISSIONofthePartiesandanyrepresentationsorunderstandings,whetheroralorwritten,notincorporatedareexcluded.I.Third-PartyBeneficiaries.NothinginthisLICENSE/PERMISSIONisintendedto,norshalibeconstruedtogiveanyrightsorbenefitsinthisLICENSE/PERMISSIONtoanyoneotherthantheParties,andalldutiesandresponsibilitiesundertakenpursuanttothisLICENSE/PERMISSIONwillbeforthesoleandexclusivebenefitofthePartiesandnooneelse.J.AssignsandSuccessors.ThePartieseachbindthemselves,theirpartners,successors,assigns,andlegalrepresentativestotheotherPartytothisLICENSE/PERMISSION,andtothepartners,successors,assigns,andlegalrepresentativesofsuchotherPartywithrespecttoallcovenantsofthisLICENSE/PERMISSION.K.Waivers.AllwaiversshallbeinwritingandsignedbythewaivingParty.EitherParty’sfailuretoenforceanyprovisionofthisLICENSE/PERMISSIONshallnotbeawaiverandshallnotpreventeithertheCITYorKINGCOUNTYfromenforcingthatprovisionoranyotherprovisionofthisLICENSE/PERMISSIONinthefuture.WaiverofbreachofaprovisionofthisLICENSE/PERMISSIONshallnotbedeemedtobeawaiverofanypriororsubsequentbreachunlessitisexpresslywaivedinwriting.L.Counterparts.ThePartiesmayexecuteLICENSE/PERMISSIONinanynumberofcounterparts,eachofwhichshallconstituteanoriginal,andallofwhichwilltogetherconstitutethisoneLICENSE/PERMISSION.9.Notices:Allnoticesrequiredorpermittedhereundershallbedeemeddulygivenifsentbymailordeliveredtothepersonattheaddresslistedbelow.
CITY OF RENTON
Recreation Department
1055 South Grady Way Renton,
WA 98057
Kbeymer@rentonwa.gov
425-430-6600
APPROVED AS TO FORM:
Shane Moloney, City Attorney
Clb 5/25/21 (1569) 3/27/2023
6
KING COUNTY
KING COUNTY
Steven Burke
Manager
King County Noxious Weed Control Program
------
(approved by Cheryl Beyer via email on 3/27/2023)
Background
This weed control prescription seeks to address the impacts of multiple species of noxious weeds
impacting City of Renton and King County properties along May Creek in Renton, reference address
4260 Lake Washington BLVD N. The focus areas for this weed control prescription plan include the
recently acquired KC Acquisition Zone (Parcel 3224059081) and the South Bank Forest Zone (Parcel
3224059109) where the City of Renton intends to construct a new trail system. Lighter weed
maintenance for the previously restored North Bank Forest (Parcel 3224059109) is also included in this
weed control prescription. See map at the end of document. Much of KC Acquisition and South Bank
Forest Zones are highly impacted by a dense Himalayan blackberry monoculture that encompasses most
of the site. There is also significant disturbance to these sites by knotweed, English Ivy, English holly,
Portuguese laurel, and common hawthorn in clumped infestations throughout. More minor weed
disturbances in these zones include tansy ragwort, cherry laurel, bull thistle, butterfly bush and spurge
laurel. There is a varying degree of native tree canopy throughout the project site consisting of black
cottonwood, red alder, bigleaf maple, western redcedar, western hemlock and Douglas-fir that is
concentrated along May Creek, the North Bank Forest Zone and the eastern edge of the South Bank
Forest Zone. There is very little native understory or groundcover in the Acquisition Zone and much of
the upland South Bank Forest Zone, consisting mostly of scattered sword fern. There is significantly
higher understory and groundcover present in the less disturbed eastern portion of the South Bank
Forest Zone, including native roses, Indian plum, salmonberry, vine maple, and pacific ninebark; as well
as a groundcover of scattered sword fern, trailing blackberry, and localized pockets of skunk cabbage.
The North Bank Forest has a very high density of native shrubs and conifer saplings from previous
restoration plantings. The King County Noxious Weeds Control Program will fund the first three years of
weed control efforts as described in this plan at no cost to the landowner through the Healthy Lands
Project. A site inventory was conducted during site visits on February 5th and 18th of 2021. The project
site will be divided into three management zones: KC Acquisition, South Bank Forest and North Bank
Forest. Throughout those zones there are 11 impactful weeds.
Impactful Weeds Species
KC Acquisition
Species Gross Area Cover
Himalayan blackberry (Rubus bifrons) 14,000 ft2 75%
English ivy (Hedera helix) 3,400 ft2 70%
Portuguese laurel (Prunus lusitanica) 1,500 ft2 85%
Common hawthorn (Crataegus monogyna) 1,030 ft2 30%
English holly (Ilex aquifolium) 110 ft2 75%
Tansy ragwort (Jacobea vulgaris) 600 ft2 15%
Bull thistle (Cirsium vulgare) 50 ft2 50%
Cherry laurel (Prunus laurocerus) 25 ft2 100%
Butterfly bush (Buddleja davidii) 1 ft2 100%
South Bank Forest
North Bank Forest
Species Gross Area Cover
Himalayan blackberry (Rubus bifrons) 2.540 ft2 50%
English ivy (Hedera helix) 1,950 ft2 40%
Tansy Ragwort (Jacobea vulgaris) 155 ft2 50%
Hybrid knotweed (Fallopia x bohemica) 95 ft2 60%
English holly (Ilex aquifolium) 10 ft2 100%
Portuguese laurel 5 ft2 100%
*Cells shaded in yellow denote infestations that would require some level of herbicide application to
realistically control within the project timeline. Non-shaded cells denote infestations that could be
controlled with strictly manual/mechanical means.
Restoration planting will be needed after weed removal in some areas, especially in the KC Acquisition
Zone and the western and central portions of the South Bank Forest Zone. Planting should include a
mixture of coniferous and deciduous trees and native understory shrubs, with a focus of creating a
native canopy cover where it does not currently exist and replacing knotweed stands along May Creek
with native vegetation to prevent further bank erosion.
Zones:
Species Gross Area Cover
Himalayan blackberry (Rubus bifrons) 4.25 acres 75%
English ivy (Hedera helix) 22,700 ft2 60%
Hybrid knotweed (Fallopia x bohemica) 12,000ft2 70%
English holly (Ilex aquifolium) 5,930 ft2 60%
Portuguese laurel (Prunus lusitanica) 2,860 ft2 90%
Reed canarygrass 1300 ft2 80%
Butterfly bush 35 ft2 100%
Spurge laurel (Daphne laureola) 5 ft2 100%
Tansy ragwort (Jacobea vulgaris) 5 ft2 100%
KC Acquisition – This 0.32 acre zone is highly disturbed by noxious weeds and has very little
native vegetation. There is a 15% canopy cover from cottonwood, bigleaf maple, alder and apple
trees – as well as from non-native Portuguese laurel and black hawthorn. There is a notable
dense hedge line of Portuguese laurel that flanks the fence shared with the neighboring
condominiums along the southern border of the parcel. A contractor for the condominiums
roughly “pruned” the laurels at fence height in December 2020 and dumped the cuttings along
the edge of the parcel. There are also notably small Portuguese laurel seedlings scattered
throughout the parcel, not all of which were mapped because of the extent of their distribution.
There is very little native understory or groundcover present on the parcel aside from scattered
sword fern, spirea and several maple saplings. Most of the site’s understory is dominated by
English ivy and Himalayan blackberry, as well as patches of bull thistle and tansy ragwort.
Additionally, there is a moderate dumping of waste material on the site that should be slated for
removal/disposal – especially along the southern boundary shared with the condominiums.
South Bank Forest – This 5.09 acre zone encompasses the portion of Parcel 3224059109 south
of May Creek, including the proposed site of the May Creek Trail Extension. This zone varies
significantly in vegetation composition throughout, with the western/central regions
significantly more disturbed by noxious weeds than the more heavily forested eastern region –
though Himalayan blackberry blankets ~75% of the zone and can be found extensively
throughout. There is a 25% native canopy cover of black cottonwood, bigleaf maple, red alder,
Douglas-fir and western redcedar in the zone, predominately along May Creek and in the
eastern region of the parcel. The presence of native understory vegetation also varies widely
throughout the zone, with large swaths in the western and central regions having only scattered
sword fern, while along May Creek and in the eastern region there are more diverse
communities of salmonberry, Indian plum, pacific ninebark, roses, and localized patches of
skunk cabbage. The majority of the site is dominated by a monoculture of Himalayan blackberry,
as well as clumped infestations of English ivy, English holly, reed canary grass, common
hawthorn and hybrid knotweed. The Portuguese laurel hedge line along the southern boundary
also persists throughout part of the site.
North Bank Forest – This 3.11 acre zone has largely been replanted with native vegetation as
part of previous restoration efforts and contains the existing May Creek Trail. There is a 60%
canopy cover of black cottonwood, red alder, and bigleaf maple throughout the site and a dense
and highly diverse understory of native shrubs and conifer saplings. There are localized
infestations of English ivy, Himalayan blackberry, hybrid knotweed, and tansy ragwort scattered
throughout the native plantings, especially in those directly bordering May Creek and along the
northern and eastern boundaries where Himalayan blackberry encroaches from neighboring
parcels.
Weed Treatment Timeline by Zone
Zone Time Target Weed Activity Responsible party
KC
Acquisition
2023
Himalayan
blackberry (Rubus
bifrons, Rubus
laciniatus)
Cut/dab(herbicide)
plants intermixed with
desirable native plants.
Treat monocultures with
foliar herbicide.
King County/Contractor
English ivy (Hedera
helix)
Remove ivy from trees
at chest height and
clear survival rings.
Treat monocultures
clear from native plants
with foliar herbicide.
King County/Contractor
Portuguese laurel
(Prunus lusitanica)
Use EZ-Ject for plants
over 1.5 inches; cut and
paint stumps < 1.5
inches (Imazapyr)
King County/Contractor
English holly (Ilex
aquifolium)
Use EZ-Ject for plants
over 1.5 inches; cut and
paint stumps < 1.5
inches (Imazapyr)
King County/Contractor
Tansy Ragwort
(Jacobea vulgaris)
Treat with a foliar
herbicide
King County/Contractor
Bull thistle (Cirsium
vulgare)
Treat monocultures with
foliar herbicide.
King County/Contractor
Cherry laurel
(Prunus laurocerus)
Use EZ-Ject for plants
over 1.5 inches; cut and
paint stumps < 1.5
inches (Imazapyr)
King County/Contractor
2023 Butterfly bush
(Buddleja davidii)
Use EZ-Ject for plants
over 1.5 inches; cut and
paint stumps < 1.5
inches (Imazapyr)
King County/Contractor
2024
Himalayan
blackberry (Rubus
bifrons)
Remove regrowth and
retreat seedlings
King County/Contractor
English ivy (Hedera
helix)
Treat ivy intermixed with
desirable native plants
King County/Contractor
Portuguese laurel
(Prunus lusitanica)
Spray/pull any regrowth King County/Contractor
English holly (Ilex
aquifolium)
Spray/pull any regrowth King County/Contractor
Tansy ragwort
(Jacobea vulgaris)
Spray/pull any regrowth King County/Contractor
Bull thistle (Cirsium
vulgare)
Treat rosettes with a
foliar herbicide
King County/Contractor
Cherry laurel
(Prunus laurocerus)
Spray/pull any regrowth King County/Contractor
Butterfly bush
(Buddleja davidii)
Spray/pull any regrowth King County/Contractor
Zone Time Target Weed Activity Responsible party
South
Bank
Forest
2023
Himalayan
blackberry (Rubus
bifrons)
Cut/dab(herbicide)
plants intermixed with
desirable native plants.
Treat monocultures with
foliar herbicide.
King County/Contractor
English ivy (Hedera
helix)
Remove ivy from trees
at chest height and clear
survival rings. Treat
monocultures clear from
King County/Contractor
native plants with foliar
herbicide.
Hybrid knotweed
(Fallopia x
bohemica)
Treat with a foliar
application of imazapyr
once plants have bolted.
King County/Contractor
English holly (Ilex
aquifolium)
Dig out small plants;
Use EZ-Ject for plants
over 1.5 inches; cut and
paint stumps < 1.5
inches (Imazapyr)
King County/Contractor
Portuguese laurel
(Prunus lusitanica)
Dig out small plants;
Use EZ-Ject for plants
over 1.5 inches; cut and
paint stumps < 1.5
inches (Imazapyr)
King County/Contractor
Butterfly bush
(Buddleja davidii)
Use EZ-Ject for plants
over 1.5 inches; cut and
paint stumps < 1.5
inches (Imazapyr)
King County/Contractor
Spurge laurel
(Daphne laureola)
Cut and paint stumps
(Imazapyr)
King County/Contractor
Tansy Ragwort
(Jacobea vulgaris)
Treat with a foliar
herbicide
OR
If flowers are present,
cut and bag them then
dispose as waste.
King County/Contractor
2024
Himalayan
blackberry (Rubus
bifrons)
Remove regrowth and
seedlings
King County/Contractor
English ivy (Hedera
helix)
Pull ivy intermixed with
desirable native plants
King County/Contractor
Hybrid knotweed
(Fallopia x
bohemica)
Treat leaves and canes
pre or post flower with a
solution of 1% imazapyr
and 1% nonionic
surfactant (Aug/Sept)
King County/Contractor
English holly (Ilex
aquifolium)
Spray/pull any regrowth King County/Contractor
Portuguese laurel
(Prunus lusitanica)
Spray/pull any regrowth King County/Contractor
Butterfly bush
(Buddleja davidii)
Spray/pull any regrowth King County/Contractor
Spurge laurel
(Daphne laureola)
Spray/pull any regrowth King County/Contractor
2025 Tansy ragwort
(Jacobea vulgaris)
Treat with a foliar
herbicide
OR
King County/Contractor
2025 Zone wide
Monitor restoration area.
Maintain plantings and
remove noxious weeds
from restoration area as
needed.
City of
Renton/Contractor
Zone Time Target Weed Activity Responsible party
North
Bank
Forest
2023
Himalayan
blackberry (Rubus
bifrons)
Dig out rootballs of
plants intermixed with
desirable native plants.
King County/Contractor
English ivy (Hedera
helix)
Remove ivy from trees
at chest height and clear
survival rings. Dig up
plants intermixed with
native vegetation,
ensuring as much of the
root system is removed
as possible.
King County/Contractor
Tansy Ragwort
(Jacobea vulgaris)
Treat with a foliar
herbicide
OR
If flowers are present,
cut and bag them then
dispose as waste.
King County/Contractor
Hybrid knotweed
(Fallopia x
bohemica)
Treat leaves and canes
pre or post flower with a
solution of 1% imazapyr
and 1% nonionic
surfactant (Aug/Sept)
King County/Contractor
English holly (Ilex
aquifolium)
Dig out small plants;
Use EZ-Ject for plants
over 1.5 inches; cut and
King County/Contractor
paint stumps < 1.5
inches (Imazapyr)
Portuguese laurel
(Prunus lusitanica)
Dig out small plants;
Use EZ-Ject for plants
over 1.5 inches; cut and
paint stumps < 1.5
inches (Imazapyr)
King County/Contractor
2024
Himalayan and
evergreen blackberry
(Rubus bifrons)
Spray/pull any regrowth King County/Contractor
English ivy (Hedera
helix)
Remove ivy from trees
at chest height and clear
survival rings. Dig up
plants intermixed with
native vegetation,
ensuring as much of the
root system is removed
as possible.
King County/Contractor
Tansy Ragwort
(Jacobea vulgaris)
Treat with a foliar
herbicide
OR
If flowers are present,
cut and bag them then
dispose as waste.
King County/Contractor
Hybrid knotweed
(Fallopia x
bohemica)
Treat leaves and canes
pre or post flower with a
solution of 1% imazapyr
and 1% nonionic
surfactant (Aug/Sept)
King County/Contractor
English holly (Ilex
aquifolium)
Spray/pull any regrowth King County/Contractor
Portuguese laurel
(Prunus lusitanica)
Spray/pull any regrowth King County/Contractor
2025 Zone wide
Monitor restoration area.
Maintain plantings and
remove noxious weeds
from restoration area as
needed.
City of
Renton/Contractor
Site Photos:
Figure 1: Photo
of the Access
point to the KC
Acquisition
parcel, taken
from Lake
Washington
BLVD N looking
SE into the
project site.
Photo taken
February 5, 2021
Figure 2:
Photo of the
KC Acquisition
Zone taken
from the SW
boundary of
the site. Photo
taken
February 5,
2021.
Figure 3: Photo
of the South
Bank Forest
from the
western
boundary of the
site, taken from
Lake
Washington
BLVD N. Photo
taken February
5, 2021.
Figure 4: Photo of significant English ivy
and Portuguese laurel infestations in the
South Bank Forest Zone, taken from the
southern boundary of the site. Photo
taken February 18, 2021.
Figure 5: Photo of a highly disturbed portion of the South Bank Forest along the southern bank of May
Creek – impacted by infestations of hybrid knotweed, Himalayan blackberry and English ivy. Photo
taken from the northern bank of May Creek on February 18, 2021.
Figure 6: Photo of the North Bank Forest Zone taken from the trailhead of the May Creek Trail along
the western boundary of the site. Photo was taken on February 18, 2021.
Zone Maps: