SENA Lake Hiawatha Meeting Presentation

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On Wednesday, December 9, SENA hosted experts from the Minneapolis Park and Recreation Board, the Minnehaha Creek Watershed District & the City of Minneapolis to present to the community on the topic of Lake Hiawatha health. Over sixty residents came to hear the presentation and participate in a discussion of the broad inputs that affect the health of the lake - some that are local, some that reach beyond the boundaries of the neighborhood. This is the information that was presented them that evening.

Transcript of SENA Lake Hiawatha Meeting Presentation

  • CITYOFMINNEAPOLIS

    StandishEriccsonNeighborhoodAssociationCommunityDiscussion

    LakeHiawathaRecreationCenterDecember9,2015

    1

  • Presenters

    CityofMinneapolisDepartmentofPublicWorksLisaCerney,PEDirector,SurfaceWater&SewersDivision

    MinneapolisPark&RecreationBoardRachaelCrabb,WaterQualitySupervisor

    MinnehahaCreekWatershedDistrictBeckyChristopher,LeadPlannerandProjectManager

    2

  • TheBigPicture

    3

    DrainagetoLakeHiawathaincludespartsofMinneapolisandpartsofcitiesupstreamthatdraintoMinnehahaCreek

    ApproximatesizeandpopulationofdrainageareatoMinnehahaCreek

    Size Population7.5millionacres340,000

  • LakePowderhorn

    LakeNokomis

    LakeHiawatha

    Sixdrainageareasthroughstormpipestotheoutfalls

    Sixpipeoutfallstolake

    ApproximatesizeandpopulationofdrainageareasdirecttoLakeHiawatha

    Size Population900+acres12,000140acres1,00085acres 7008acres905acres402.5acres20

    LEGEND

    Creekflowintolake

  • BancroftMeadowsFloodBasin(Bloomingtonand42nd )

    Built1989

    1

    LakePowderhorn

    LakeNokomis

    LakeHiawatha

    1

  • SibleyFieldFloodBasin(nexttoSibleyFieldPark)

    Built1990

    2

    LakePowderhorn

    LakeNokomis

    LakeHiawatha

    1

    2

  • LakeHiawatha

    37th &Columbus2CellFloodBasin

    Built2003

    3

    DryCell

    LakePowderhorn

    LakeNokomis

    1

    2

    3

    WetCell

  • BlueWaterPartnershipRainGarden(E43rd Streetand20th AvenueS)

    Built2012

    4

    LakeHiawatha

    LakePowderhorn

    LakeNokomis

    1

    2

    3

    4

  • AnnualCityPrograms

    StreetSweeping

  • AnnualCityPrograms

    InspectingOutfalls

  • AnnualCityPrograms

    CatchBasinStencilingByVolunteers

  • AnnualCityPrograms

    NEWin2016!AdoptACatchBasinProgram

  • Stormdrainsandcatchbasinsaredesignedforrainandsnowmelt notleaves,grassclippings,trashoroil.

    1. Sweeporrakethedebrisfromareaaroundgrate,anddisposeofinthetrash.

    2. Ifdebrisislodgedinthegrate orvisibleunderthegrateinsidethecatchbasin donttacklethisyourself.Contact311forCitycrewstocleanout.

    2

    1

    2

  • LakeHiawatha:ThenandNowRachaelCrabb

    MinneapolisPark&RecreationBoard

  • 1850sEraSouthMinneapolis

  • 1956

  • MPRBWaterMonitoringActivitiessince1992

    LakeLevels Nutrients(phosphorus,nitrogen) Clarity(secchi depth,chloroplyll) Physicalparameters(temp.,pH,conductivity) BeachMonitoring PhytoplanktonandZooplanktonspecies Aquaticplantspeciesandabundance Zebramusselmonitoring(since2010)

  • 809

    810

    811

    812

    813

    814

    815

    816

    817

    1995 2000 2005 2010 2015

    E

    l

    e

    v

    a

    t

    i

    o

    n

    (

    m

    s

    l

    )

    Year

    Lake Hiawatha OutletElevation (OHW) = 812.8

  • TrophicStateIndex(TSI) Indexthatcombinesphosphorus,Secchi(clarity),andchlorophylldatacalculated

    inordertocharacterizealakesoverallhealth.

    Higherscoresindicatemorealgalbiomass,lowerscoresindicateclearerwater.

  • HiawathaTSI DroughtYearsHighlighted

  • BeachBacteriaMonitoring Weeklymonitoringduringswimseason doubletriggerforclosure

    Singlesampleover1260cfu Geometricmeanover126

    Multiplesources(humans,pets,animals,creek,stormwater)

    MinnehahaCreekTMDL longtermproject

    NowaterborneoutbreakseverinMPRBsystem

  • BeachIssues

  • RecentProjectsatHiawatha

  • MinnehahaCreekInfluenceonLakeHiawatha

    BeckyChristopherMinnehahaCreekWatershedDistrict

  • TotalMaximumDailyLoad(TMDL)Study

  • TotalMaximumDailyLoad(TMDL)Study

  • UpstreamImprovements

  • UpstreamImprovements

  • WhatCanYouDo? Sourcecontrol:

    Keepstormwaterwhereitlands Cleanupleaves,grassclippings,andtrashinstreetsandalleys

    Specificprogram/events: AnnualCreekCleanup July24, 2016 Costsharegrants

    http://www.minnehahacreek.org/grants BecomeaMasterWaterSteward

    http://masterwaterstewards.org/ December15deadline

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