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Home My WebLink AboutR-390046H W K a 00 0 O O O 1 U) a J 1R w M ..d w Z J n Q NE 1/4 SECTION 23, TOWNSHIP 23 N. RANGE 5 E. W.M. ALPINE NURSERY WET BIOFILTRATION SWALE 6O'---4,a-18O.• 6.0' M I WET B10FIL7RATJON SWALE CROSS SECTION Is NTS NOTE.• WET 910FILTRATION SWALE PLANRNG PER LANDSCAPING PLANS AND KCSWDM, SEE THIS SHEET. Cal Waking Days Before Yat pb 811 UNUM Ihatlerground Location Center ODMT,ND,Oi%WA) D.R. STRONG r CONSULTING ENGINEERSFN30 •I� ENGINEERS PLANNERS SURVEYORS ` FMTTHAVENUE KIRKLAND WARRIt 042562]3033F4258272423 rf7a7GiCdJ hV1010 Soil AmenCment 1. Two iacbe; bounimm) of well -rotted compost sball be tilled into the advice Image treatment area to amend the topsoil unless the sod already has an organic content of 1 percent or greater. This applies to bothull soils as inches sandy mils. In venni coarse soils (gavels or comsa), tap soil must be imported and minded to the required orgmic consent. a) Compost must be ufied into the wdalying native soil to a depth of 6 wither to pieces( the compost from being washed am and to avoid creating a defined liver of different soil types that can prerm downwad percolation of wan. b) Compost shall int column any saw dust. maw, grew or order- composted organic matter. of tonic or otherwise harmful materials. c) Compost shall int conte mantenlired murine because it can [each fecal coliform bacteria into receiving waters. 2. SOD or sod wild a day content of greater than 10 percent should be avoided. If there is cancan for matamaauon of the underlying gmuodwata, the swale bottom shall be Ivied with a treatment liner to prevent groundwater conmmination. See Section 6.2,4 (p. 623) for demfls on treatment laws options. KCSWDM PLANTING REQUIREMENTS FOR WET BIOFILTRATION SWALES mthu becauwofitstm&mywspread_ Natweplmtspecur(egArnmkmean )arepreferted. N hate: These recommendarrans arefor the Eing Comp' arca. ffthsse destgau are useda milia arses py,I lacer] bmwlesige should be used to tailor rhue recommendariom to local cons idols. }" DIAMETER SMOOTif — BARS EQUALLY SPACED (4" O.C. MAX) AL PLAN VIEW LOWER STEEL BAND }" X 4" WIDE FORMED TO nTIN GROVE OF OR RISER 24" SEE UPPER STEEL BAND }" X 4" WIDE TYPE 2 CB. A I DETAIL HOOK CLAMP N 5. Sod maybeused asa[empormy ewer during thewet season mreseeded lien saddedas mustbe with suitable grass seed core as soon as the weather is conducive No seed gemination unless to sod is grownhomamedmix Fusible for the wetter conditions of a biofiltration swat. Sodmmstbe removed ormtotilled wo the tWedywe mJ before reseeding. Catena 4l and 2 above for seeding NOTES shall then be followed Planting Requirements Some as for baric biafdmation malas (am page 6-477 exec[ fordic 611owing imaginations: 1. A4v ofacrepnble planlsxiW�mded Rrtmg is Oven in Mable 6 l 2 AIp.6-5I). to Downs, a u best to viamtevml comet b io onme the 44elihood 7Lat a hent Wine of the ack tad apcim rill Cud ®axio5 caodJiays Gt'mable. _. AwttlamuMmmmavee.ppbasq e)eW.--•..g.wt.fao<mape Is poor, plmbnp ofmoumce or mirent stoc4 u mpuued Pw eoeetwe u conudemd robe rime leas 30pffeembaae room (trough thereper 2 5 of the male mor Imuweeks. TABLE 631A REC01fllE'IDm PLiVIS FOR wETBIOFLLTR{TIDE Sw:{IS Planting Requiremam sclentmcname spaces Ion comer) L Grass shall be established throughom the entire meatxm area of the swale subject U, the following AWecurva emormis seed provisions: aKp.mm7s mommmwa soon a) Seeding is best performed in spring (mid-March to fame) or fall (hare Sep ember to October). For EkoWm app, 4awha sumer seeding. sprinkler systems an other measures for wmerag the gess seed mustbe corm mnsam 6aiemw� Prov{dol. cawdwa B:ms III Seed may, be applied ria hvdmwed gerr broadcast apphomon. Come No aaaaFa. c) Irtigau se is required during the fust summer following installation if seedling occurs m spring or cycemccoaenm area summer. Swaks seeded in the fall may not need irngatina However the maintenmce and defect Hokua moXu mud financial guarantee will not be released unless a healthy grass cover is eselthshed Therefore. Jencus toruis 6iFtlea site P" should address the owed for smatters or othermeans of miganom Rrrrppa aaotoNcmaauatloaa 12 mNw 2. Swale treatment areas are subject to both dry and wet conditions, as well as accumulation of sediment Comorme W" emox 6 K lid debris A miahue ofdry-mea slid wet -ern grass species that ren cmiwa W Brox' through silt Snryus mitts 6MFn deposit is most effective. Two acceptable grass seed mixes for the Ring Comer arca arc listed in scows moccomarm 121ncMe Table 6.3.1.0 (p. 648). The maims stall be applies throughout the &wile in the treatment area at a rate of 80 pounds per arae. As On altemata a to them mixes, a horticultural or erosion control specialist may develop aimed specificationtiloredto the site Table6.3.11)(p b-M1S)lists gasses or other plants particularly tolerant of wet conditions. Some of them seed types, however. may int be commercially available. 3. A Newly contractual swale shill be protected from siormwater flows until grass has been established This may be done by diiestmg flows or by covering the swale bottom with clear plsstic untilthegassiswefirocted If these actions are not feasible. an erosion control blanket didlbe placed over the freshly applied seed mix. See detazhed Appeal¢ D. ESC Smirched&, for details on 1441. erosion control blankets. SMOOTH tV 4. Abort the design treatment elevation. either a typical lawn seed mix or landscape plantsmay be VER nCAL BARS (••) used. Howeverfor swaks alm used 0 convey high flows, consideration shall be given ionic soil bindiogcapadryofthevegmauon. Acceptable grosses and gromakovers impreuntedin LU Table 6.3.1E (p. 6-59). Plmt material other thm that oiTn in &e tble m y beuwd if the swale is HqCLAMP I privately maivwnedaudthe plant selected will not spread Leta to swale trntmed area_ Ivysha0 ORED TO C.B. RISER mthu becauwofitstm&mywspread_ Natweplmtspecur(egArnmkmean )arepreferted. N hate: These recommendarrans arefor the Eing Comp' arca. ffthsse destgau are useda milia arses py,I lacer] bmwlesige should be used to tailor rhue recommendariom to local cons idols. }" DIAMETER SMOOTif — BARS EQUALLY SPACED (4" O.C. MAX) AL PLAN VIEW LOWER STEEL BAND }" X 4" WIDE FORMED TO nTIN GROVE OF OR RISER 24" SEE UPPER STEEL BAND }" X 4" WIDE TYPE 2 CB. A I DETAIL HOOK CLAMP N 5. Sod maybeused asa[empormy ewer during thewet season mreseeded lien saddedas mustbe with suitable grass seed core as soon as the weather is conducive No seed gemination unless to sod is grownhomamedmix Fusible for the wetter conditions of a biofiltration swat. Sodmmstbe removed ormtotilled wo the tWedywe mJ before reseeding. Catena 4l and 2 above for seeding NOTES shall then be followed Planting Requirements Some as for baric biafdmation malas (am page 6-477 exec[ fordic 611owing imaginations: 1. A4v ofacrepnble planlsxiW�mded Rrtmg is Oven in Mable 6 l 2 AIp.6-5I). to Downs, a u best to viamtevml comet b io onme the 44elihood 7Lat a hent Wine of the ack tad apcim rill Cud ®axio5 caodJiays Gt'mable. _. AwttlamuMmmmavee.ppbasq e)eW.--•..g.wt.fao<mape Is poor, plmbnp ofmoumce or mirent stoc4 u mpuued Pw eoeetwe u conudemd robe rime leas 30pffeembaae room (trough thereper 2 5 of the male mor Imuweeks. TABLE 631A REC01fllE'IDm PLiVIS FOR wETBIOFLLTR{TIDE Sw:{IS common name sclentmcname spaces Ion comer) SMnawnbgml AWecurva emormis seed Wierm:<an aKp.mm7s mommmwa soon Spoke Fish EkoWm app, 4awha sWaao moor corm mnsam 6aiemw� smn.m..dm. cawdwa B:ms Seem, Come No aaaaFa. Wenam sometimes cycemccoaenm area VeNsoper, Hokua moXu mud Seem Fort Jencus toruis 6iFtlea Wa:ertFeW Rrrrppa aaotoNcmaauatloaa 12 mNw WaxrwF9M Comorme W" emox 6 K Hartshorn Wlwh Snryus mitts 6MFn smal4tmhed sulnan scows moccomarm 121ncMe ' 6mLlmirea N'annks with sge mann sensors oNbw, mtlF as Nix misnomers ora Leve 2 as 3 worn" marry over caws (Tssha he"o) 7s not eppmtnemmrmaalwxea seaeeceme wan mya,me ,no I mvngemir none ninemmoms; mmerwren 6asnomoment ire cram, BY I DATE I APPR AS NOTED ��SCALE ADDORDINGLY 15- (THe) SEE NOTE I 4 HOOK CLAMPS EVENLY PLACED SEE DETAIL BELOW ALUMINUM OR ALUMINIZED STEEL (TYP.) PROWDE MAINTENANCE ACCESS BY WELDING 4 CROSSBARS TO 4 VERTICAL BARS AS SHOWN HINGE UPPER ENDS WIN FLANGES/ BOLTS AND PROVIDE LOCKING MECHANISM (PADLOCK) ON LOWER END LOCATE STEPS DIRECTLY BELOW, PAD LOCK TO BE PURCHASED AT TRE CITY OF SAMMAMISH. }" DIA. SMOOTH ROUND BARS WELDED EQUALLY SPACED. BARS SHALL BE WELDED TO UPPER & LOWER BANDS (24 BANDS EVENLY SPACED SEE NOTE 1) SEC77ON A—A RIM EL. 36b00 EPDXY COA70 STEEL STEPS OR LADDER t. DIMENSIONS ARE FOR ILLUSTRATION ON 54" DIAMETER CB FDR DIFFERENT DIAMETER CB•S AD.AIST TO MAINTAIN 45• ANGLE ON "VERTICAL" BARS AND 7" OC. MAXIMUM SPACING OF BARS AROUND LOWER STEEL BAND. 2. METAL PARIS MUST BE CORROSION RESISTANT. STEEL BARS MUST BE EPDXY COATED STEEL. 3 THIS DEBRIS BARRIER IS ALSO RECOMMENDED FOR USE ON RIE INLET TO ROADWAY CROSS—CULVERTS WIN HIGH POTENTIAL FOR DEBRIS COLLECTION (EXCEPT ON TYPE 2 STREAMS) 4. THIS DEBRIS BARRIER IS FOR USE OUTSIDE OF ROAD RIGHT—OF—WAY ONLY. FOR DEBRIS CAGES WITHIN ROAD RIGHT—OF—WAY, BIRDCAGE DETAIL (KCSWDM FIGURE 5.3.1.C) 77LL LINER NOTE: (KCSWDM 6.24.1,) O COMPACTED TILL LINERS 1. Tircr bushe ss sLillbe lB wilier after mmpacma 2. Sodahalibemmpreted to 95'S minmlmdry density,modifiedproctormethod(ASTMD-1550. 3. (Ixl evtdepthaalso be w>ilieu o retardWe and 2. avmen24a 10'Lerhm pv mimtlm (1 a 10` �/s) may also be red a heir of Cnkrw l and 2. 6 Sailshomdbepkc m6Lec hN 5. Soils may be used that meet the following gradation. Bievesire Pemenl Pesalal 61nds 100 4 inch 90 w To - loo all 20 -100 CITY OF RENTON Planning/Building/Public Warks Dept. 6 NORTH GRAPHIC SCALE 0 5 10 20 wmmm 1 INCH = 10 FT. BY: BY: BY: AS -BUILT BY: ALPINE NURSERY WET BIOFILTRATION SWALE DETAILS U15007366 DRS PROJECT NO. 14069 NTS — Date: — Date: — Date: Date: mn09.28.15 FI FIVE m mnC29 m 00, 29 42 R-390046