Low Impact Development (LID) Feasibility Study - City of Kirkland

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Central Way (CIP Project #: NM 0065 000)CIP Project DescriptionCentral Way at Lake St. design and construction of pedestrian “bump-outs” at key crosswalks along Central WayLID Opportunities and Benefits• Stormwater planters near existing catch basin can attenuate flow and treat some of the runoff from the roadway.• Stormwater planters and porous pavements will reduce existing impervious areas and reduce runoff from the right-of-way.Due to the large amount of impervious cover in adjacent areas versus the amount of space available for LID elements, stormwater planterscan provide nominal flow attenuation and water quality treatment, but their high visibility will provide enormous public awareness anddemonstration benefits of what LID elements look like and how they can be incorporated into the existing right-of-way. In addition, toproviding some stormwater benefit, the stormwater planters will provide some safety for pedestrians crossing Central Way.Zones 1 & 3General existing conditions & considerationsCrosswalks with no bulb-outProposed concept• Add bulb-out to create a refuge for pedestrians crossing street and promote traffic calming• Incorporate stormwater planters within bulb-out to serve as a LID demonstration feature as well as to provide nominal water qualityimprovementsZone 2General existing conditions & considerations• Crosswalk with no bulb-out• Striped (unused) parking space surrounding catch basinProposed concept• Add bulb-out to create a refuge for pedestrians crossing street and promote traffic calming• Incorporate stormwater planters within bulb-out to serve as a LID demonstration feature as well as to provide nominal water qualityimprovements [same as proposed in zone #1]In addition:Utilize striped area and parking spot for stormwater planter to treat runoff from adjacent impervious surfacesStormwater planters in bulb-out at Central Way & Main Street - proposed26City of Kirkland LID Feasibility Study for CIP Projects | SvR No. 07016 | December 21, 2007 c
! ! !! ! !3! ! ! !Peter Kirk Park3rd Street[Central Way (CIP Project #: NM 0065 000)Feet0 100 200 300Legend2Main StreetCentral Way! ! ! !PedestrianCirculation! ! !Vehicular TravelLanesRight-of-WayPavement EdgesContour Lines (2’)StreamPipeCulvertDitchPark LanecWetlandBioretention swaleRain garden orStormwaterPlanter! ! ! !LegendFeet0 100 200 300SWlinesLINE_TYPECULVRT! ! ! ! ! !DITCHLAKEPIPEPONDSTREAM! !SWALEwetlandstax_parcel[pavementedgeROW Feet[bldg_pyKirkland LID Feasibility StudyPark Lane1Lake Street300ity StudyCity of Kirkland LID Feasibility Study for CIP Projects | SvR No. 07016 | December 21, 200727
Page 1: Low Impact Development (LID) Feasib
Page 5 and 6: IntroductionProject SummaryCity of
Page 7 and 8: IntroductionWashington’s neighbor
Page 9 and 10: Low Impact Development (LID) Glossa
Page 11 and 12: Kirkland LID Feasibility Study for
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Page 16 and 17: NE 100th St. (CIP Project #: NM 003
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Page 35 and 36: Zone 2 (Park Lane East)General exis
Page 37: LID Cost SummaryThe following estim

Low Impact Development (LID) Feasibility Study - City of Kirkland

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