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I ��' J 1 / II -� / >;-:75 -: — WETLAND A %'��-` -� I / 1 I / I \ CITY OF rl / / /III \\ \ \ \ \ / I' / I I 1 I \ �%'%� %�' UNINCORPORATED J \ KENT \ I I \� % ,% ,; v v I v v 11 1 A v I t , - - %„ KING COUNTY I / / I I , I / i I \ . \ \ \ �. \ \ \ , \ \ \� , \ A I I \ , 1 - i -%!uv� �-'; - u !i-/E.'�i � �' EXISTING CONDITIONS SCALE 1 "=100' s mm A m - SE 1Ta1hN A m m 'kinth St SE 180th St SE 1SNh s, $E,enlhe, Si 18a,h PI m sc",i,t51 ro 31I32na St _SEl87 nd s[ Ell 1� m SE 183rdp `n 11. m Emenainment wmeran^. m1111111111111 Church s s�,vaw st ,-1T9th Ps SE I7a.h PI SE SF I Beth 51 SE 180N'Sr SF 1815t 9 ,$,\i 5E, alsis s`1pj `ES` PROJECT AREA KenrredY I & Ill ne!,, S15 - 7' SE I e4Th 51 SE 1841h S� q - ,Pl Sk'1841h P/ - m m `� Let I l Feign SE ah' :- T2 drafting LansCn,ction SE IS(i!h St m SF 1 Hin 51 h Action . SE 1861h i� o'"-. _ $ EMillillilmeFlt -: �, SE 186th P, 5E TA6th el It �' &Events Trinity BaPtisl� �w � �_ SE I B 71H St w Ghurch ' �\97sy pr &oW d "sr, - S L_ - " c is SF 18arh SI .i m SE TR, ,. , 51 Thomas, - .. Fairvroud h.s Onhod-Church T.W��g ••. 8uule-d 'Angel Gare d Lane Park m sLr.SE SE It, Phm.oii.phy Ruth 5E I,,dO` e y 3 �Ln by - o a U 3 - .. Cuim' r s ♦Y' l i „ .r�, MeeXer i Fair—d! n n 4 ¢ Middle 5ch-1 "� [;W. en LI; ' Preschool SE 192nd 51 m � 5E 192ad Si ^ SE 19SE 192nd St 2nd St SE 192nd Sr -.'SE sE 793rd,,} Ak kr=er �, Thompson 5[5[ephPn M1 �, w t:onsrruchon ' • Electrical > the Martyrt � w `�" _ - '`� m Services - " � � s' New Beginnings t 3E 194fh St Glenrid ge n n L e - ' %, Elementary W n Y Christian w Fellowship � School ,'!,� m a.sf 19`a� '� m Aunt Pattys,�. 1�11 SpringbrvoH Place •' s m c 54196th S1 H 5: 19G d, as sE,aGth s, , Farms ' I � I s SE 197th Sr Ao First bvengelieal w w 4 Lake Yo Y• PresbYleri- n s K-11i R w m Eiemen G hutch m Photography `E :9P.1h 91 '°PJ SE "' - m s '� 4lF ywh54 PBJSludip � r sl s 3E tooth 51 SE Luau, st = se 2omh 5r :PaNL Ell C•; 1, sL Hause 3 e nVe w`LeYrc 11--es - SL 2015& n Jp/! Oattors ' � 'm_; Ch -. g - ... r K6W, auto Repair s r - 1 5k g Marima (mobile Mecllanrc) p �� m m Leaning"' r� no^� AS 5E207nds y� SE2R? GP, 3[ n SF ,� rn ;,k m SE 2l13rd 5t ElA, `� ,?�T•reo ilata ®2014C le uFx _' -,- nR O Redmond .,,,. y `e_,ii -1Ne .. ry sarn..i ` Ll vers,,y L.-Ph-1 Central .. pF a`, '.Park d _;e Wes, Paint rrPmE�,t rt-t • Pa,k Honghfon - hiaryrn... 11 ,bridge Lighthouse ,, 9 PerR _ `� Cemabnn Par+ I' ntl M k.__,-..- r Pd f 1 II archmdAav M`nno1ia IdYlrvood, ■ aninhri n A take CIYde Hiq .r�t� Park , , ue aeth 1. , .land e n pifill II wd,1r gton Med• , J, I -.' Bell n: c r,al J _ammamish, -Fogwi . F'a'- s.:rn�.aa�m,lagrr.ww ® Seaitle l t,ct Bellwes� W t ias""�` -'^ Ark, eeanh U' _Atl A ll1'.- Lake Hills - r O Pa,k a w t Lek 'r f r r _ M1 Rs " _ sa mi h „ O ,. Merced Ew aft Klahanle 2, 1 Manchester -west Sean a .p 9 1 f S,atenark Island Fal .l rnem,h. Pram Boat Mauch-;" Greater cby te_unch Hlghnom, m-11eh a ._ I` eir�nao , Rainier N--fle a, central Park .: Gel d e se au._�.n -I,..; s g valley Lske i Issa9vah r Pam' Snonual,nli SEA, allorm "ark Preston . d modA.«x4 a91 cOrlg Il4vuniain '.... WIh ,ter ,vnaf 9 i ".- W, fend Park sES.lks kAd e 1 h' ;r. nrr-n A''m 4s` ununere+n Nall rt[ Nah�rai Area' R.Itk, v E l Renran H nlofn igh{ends Q,.R n ri1lk,al:e © 1 %c So-RiUA- 6urien - MaPle ai Ns O 9 e ri! nyl"a.'k - = t Mamlenance M�nn�mont � * 1 jAnders:on.Pulnl - ..... M[nle 3_. Vaehon ..eaTnc -raIei9 .-Lnke r �radix _ Nn•mantl [)wire I Psrk 11 , � Park Y 0 - ;O s Mows Ola,la - sE tsind sr V..hw = mbart 6E Nelson Rd Wand Y4 R5 -o d Mer'I °a - 1 hill-M d ien vem sr v 5 I faint ge+h191nf�5� $_[Zli. , sESE224i /s w g f'. ifoN, i, P"k Lcrandvaw oft � :,,sfav' Bash 0' i'ar% 5,5 SE249,h St { ' { K-1 „ Lake W,Idernesa - t eJ 'cArdnrelum Gallwaler t F � ,� Sale Park Cvvin]tvn "i valley _ ;� L elei _ W e 'QQ A&.ensdale `L . q, Lake 9 ' , Gig lia Nor ® m � Manua-Berryd le A - 8 z Lea Hill - ,FederalWay �I `,l s 14 �, e w axon., Auburn 1 , slack �yd' ,^rZZ p h P 1" ,a :. s wane,, �, °'t, q �, 151 _ _ ,_, MandaEal 146n 1, VICINITY MAPS SHEET INDEX 1. EXISTING CONDITIONS 2. IMPACTS AND MITIGATION PLAN 3. MITIGATION PLANTING PLAN & SCHEDULE 4. MITIGATION PLANTING PLAN CONT., PLANT INSTALLATION SPECIFICATIONS AND DETAILS 5. TEMPORARY IRRIGATION PLAN 6. MITIGATION NOTES 0 50' 100' 200' 400' ii NOTES 1. CRITICAL AREAS DELINEATED BY THE WATERSHED COMPANY BETWEEN 2007-2014 2. SURVEY RECEIVED FROM PARAMETRIX. DRAFT - NOT FOR CONSTRUCTION © Copyright- The Watershed Company 750 Sixth Street South Kirkland WA 98033 p 425.822.5242 www.watershedco.com Science & Design 00 r O �� (0 O V O v _M CJ `11ill-i ., 06 r 11ill—i Z O r z � O _ .. O 00 J 06 (0 o Cn N Cn 0- Q w O 0rn0 � v ' Wz<QCrQ UOw0N� 9 � 2i 0 O z o QOCQ ��0 O w � � P4—LL--NLLJ z W - — CDL 0 U) O W rn O') ill O � W &j DC O w U I..f_ Q IZ >_ IL IL IL IL IL IL 0 w U) w o g¢ U) a a w 0 O O 06 J H O M 2i E U w a 2 O» H�� w K J 0 I— 2 w U z 0 P: 2 w U z w U) w w a M a i w n M ELm i (/) w w O O w w w D D U U d OC OC Ill 'IT IRT IRT IRT IRT W T T T T T T Q r Mr r 04 CV N O O� r C I Q r O O O O O O O O r O r �eeeeee SHEET SIZE: ORIGINAL PLAN IS 22" x 34" SCALE ACCORDINGLY. PROJECT MANAGER: NILZzs DESIGNED: NL/MF DRAFTED: MF CHECKED: NL/AS w w N 6 JOB NUMBER: Z 140121 in F_ W IY Z ZI SHEET NUMBER: a 2 Uj N W1 OF6 QNQ OF oco" COO/ �77/tZ nAATnul In I 'I \1 I \ \ 1 \ / / I I I j / j''/� 6PA l 1 / TRAIL i FUTURE SOOS CREEK FLOW DISPERSAL �- r TRENCHES SEE CIVIL WETLAND A �\ I II111 \- /- IA" 13$ 1 1 / \-/_ v �i ! , � , l� v \ � �- /i � � SOOS CREEK \\�\\, STANDARD WETLAND \ \\ 1 11 I// �''� /- NOT DELINEATED ;,y BUFFER LINE /S."t TEMPORARY IMPACTS DUE TO GRADING�- �// PROPOSED MODIFIED I / / IIIIII 11 \ BUFFER LINE I�III 56 /j �!y' % i j'�►�-� / ��%- - /yv%/ i_ Ln o I IIII \ .L_, � � � __ -__ � \ � '/ / � / �' I I I,\I IIII II / I IIll 11131 I I I I I �- \ l %yu,//�_%N I I IIII l l I I l l l l I I 1 I •I =/�'/// �"'/ /''i%/ //yam l I 11111/ L� l I \/\ \ \ \ �b� CLEARING AND GRADING _ \ \ _ _ I ' BOUNDARY, SEE CIVIL ��j'�% yam- �II coL,� _ _ —, --%x— "„ )LO/ vvwv�A,�A wv� i \ \ I I yI RIP -RAP OUTFACE l / PERMANENT BUFFER CITY OF vvv vvvv ` v vv I I�I v I I II = 1 '� I M PACT (TYP.) \\ \ \1 \ I \ I I RENTON- +1� -431-'�- / I 1 VA� \ ,388_- I/ DRAINAGE A / I/ /�/, / v `� I _ / -/!� NEW SEWER LINE CONNECTION I v v : / -r Z �'�',,,- TO EXISTING MANHOLE, II, / III NON -JURISDICTIONAL 111� 10 � v ` '�" �� _ TEMPORARY WETLAND'> I �Ill� A \ �Il�llll/% o"I I l �I� I �� I - ��/%/ // DISTURBANCE / ' 0U, / ,\ \ \ \ - / �� /� �' , 3,000 SF �� -ILL-- 1I�Illl�l05� 3� _ - S o o 0 0 COr U0� n 0 �N N CITY OF KENT > 0 0 0 0 0 � 0)� 0) 0-) �� `w c PERMANENT IMPACTS DUE TO ROAD 1 I l I / AND SIDEWALK IMPROVEMENTS _< < � [ l l / / �� ' o -- — _-�— _ /� UNINCORPORATED -KING COUNTY vvv � . . \ \\\��\. I \ 1 II III I \\ \ /t O a901 IMPACTS AND MITIGATION PLAN SCALE 1"= 50' AT FULL SIZE 22"X34" PLOT '�\�\�\��i\�11•IIIIII/(/�////"////I'/'///\//�/�/I�I�I�Illl�l�/II�IIII1�\�\\\��\ \\\"\\\\1j \6 /ll I III I 111 l I ll I IIIIIII11//III/III IIII�IIlllll `y\' IIIIII III IIIII \� \\\\ II �IlIlC/o// //rl ll�i////� \ ill II II /IIIIII IIIIII/ll�ll�/ l 1 1 I l l l l I ll� \ \ 1 `vvXv \\ \\\II I I I I I I IIIII I I I I I 11/llI I I �l\ll III' I11j 1\\ II IIII \\\\ // iz / // l I I IIII IIIII 111 I' ii/�i Io\ \\$ III ///lll_I I I I IIII I� II /// I I ► II I�r�l>�i�///i// I IJI /II///// / / / LEGEND . •..•� DELINEATED WETLAND BOUNDARY - - - - - - - - WETLAND BUFFER, APPROXIMATED ----------100'-0" STANDARD WETLAND BUFFER, KING COUNTY -•'-'•-•'-'•-•'-'•-•'-'•-'- PROPOSED MODIFIED BUFFER - - 180'-0" STANDARD WETLAND BUFFER., KING COUNTY 150'-0" STANDARD WETLAND BUFFER, CITY OF KENT ==7== WETLAND IMPACT, TEMPORARY, 3,000 SF __ __ __ ____ __ __ __ WETLAND BUFFER IMPACT, PERMANENT, 9,700 SF WETLAND BUFFER IMPACT, TEMPORARY, 36,750 SF WETLAND BUFFER LOSS AREA, 3,250 SF (DUE TO BUFFER MODIFICATION) WETLAND BUFFER GAIN & MITIGATION AREA, 19,000 SF FUTURE SOOS CREEK TRAIL* PRE-EXISTING IMPERVIOUS SURFACE 0 ® °)l SPLIT RAIL FENCE WITH CITY APPROVED SENSITIVE AREA SIGN IMPACTS 3,000 SF TEMPORARY WETLAND IMPACTS 36,750 SF TEMPORARY WETLAND BUFFER IMPACTS 9,700 SF PERMANENT WETLAND BUFFER IMPACTS 3,250 SF WETLAND BUFFER LOSS AREA *SOOS CREEK TRAIL IMPACTS TO BE MITIGATED SEPARATELY BY KING COUNTY RAITI!'`_ATIl1A1 3,000 SF WETLAND RESTORATION 36,750 SF WETLAND BUFFER RESTORATION 19,000 SF BUFFER GAIN & MITIGATION AREA SEE CIVIL DRAWINGS FOR UTILITY PLAN 0 25' 50, 100, 200' NEI 140121 SHEET NUMBER: DRAFT - NOT FOR CONSTRUCTION W2 OF 6 © Copyright- The Watershed Company _ THE WAT E RS H E D COMPANY 7- 5! 750 Sixth Street South Go l \I 1 k� !� .,!. . �,,u Kirkland WA 98033 / p 425.822.5242 www.watershedco.com Science & Design Trad O 00 O b'''� O � 06 WETLAND A �vu-' z = 00 Q U) O Ln _- i �- / I - � � � / / ''� i � � Q w O 00 co N co \ \ ' GABION OUTFACE O O I -I� AND CLEARING /' � O � LIMITS, SEE CIVIL W / �"'j-,,,, N z LL LU LLUL O LU ��U_U_ 0 w U) w o g¢ U) a a W 06 O O °� J H O m U (q aP: 2 O» < w Z J 0 w 0 Z 0 P: w 0 Z w U) LY w n M a > w a > (� w w O O w w w 0 0 0 U m w x W T T T T T T r r 'IT N C Q c? r C� o r Ci 0— cb cb M C C O O O O r r SHEET SIZE: ORIGINAL PLAN IS 22" x 34" SCALE ACCORDINGLY. w PROJECT MANAGER: NILZ DESIGNED: NL/MF LL DRAFTED: MF CHECKED: NL/AS JOB NUMBER: w mU_ w Z Z� a < 0 N Q N o� x U Z M TCHLINE B CCD THE PLANT SCHEDULE \\ I \ I I M TCH INE - \ I i \ \ \ \ \ + +\ + + II TREES QTY SIZE PSEUDOTSUGA MENZIESII / DOUGLAS-FIR 17 4 FT. HT. & 20 IN. DIA \ \\ \ +� + + + + + + + _I — — \ I CO \\ 00 I n I I �Ae WATERSHED ROOTBALL MIN, B&B. \ \ \ \ \ + + \ � + + � ;� I I I I ' I I ' I m COMPANY ° RHAMNUS PURSHIANA / CASCARA 19 1 / 2 IN. CAL. MIN. & MAX. HT. 6 FT., B&B \ 1 \ \\ \ +\� + + + \ + + + +� + + I \ I ce SALIX SCOULERIANA / SCOULER'S WILLOW 17 #5 OR #7 CONTAINER & \ \ \\ \ \+ \ +\+ + + + + + + + 750 Sixth Street South VI TSUGA HETEROPHYLLA / WESTERN HEMLOCK 13 MAX. SPREAD 24 IN. 4 FT. HT. & 20 IN. DIA \ \ \ \ \\ + \ + \ \+ + + + + + + + + + + �� \ I I II \ I Kirkland WA 98033 SHRUBS ROOTBALL MIN, B&B. \\ \ \ + + + + + + + + + + I / —I — / = �, II I I \\ p 425.822.5242 ACER CIRCINATUM / VINE MAPLE 19 2 GAL. SHRUBS CONT. QTY. SIZE \ \ \ �\ \ + \ + . + + +\+ + + + + + + + I \ I + + + \� \ I _ I —fi �I I I \ www.watershedco.com Science & Design m a I AMELANCHIER ALNIFOLIA / SERVICEBERRY 77 2 GAL. • SYMPHORICARPOS ALBUS / SNOWBERRY 57 1 GAL. O \ \ \ 1 \ \ + + �+ + + �+ + + + + + + \ ` + . + \ EASEMENT LINE. a TREES OK WEST I I 'C I II / ' -►1 C I CORNUS SERICEA / RED -OSIER DOGWOOD 52 1 GAL. VACCINIUM OVATUM /EVERGREEN HUCKLEBERRY 89 1 GAL. \ \ 1 + + . O OF LINE. 1 � \ \ \ I + + + + \ I II C: I I I CORYLUS CORNUTA / BEAKED HAZELNUT 62 2 GAL. GROUNDCOVER + +GRASS SEED MIX PROTIME 504 UPLAND MIX, AVAILABLE FROM \ I \ I \ \ \\ + + + + + + + + + + + I I + + O 1 I 4,\ + + I / + + I I I I I'T7 I 00 HOLODISCUS DISCOLOR / OCEANSPRAY 60 2 GAL. WWW.PROTIMELAWNSEED.COM, OR EQUIVALENT \ \ + + + + + + + + + +° \� / APPLY PER MANUFACTURER RECOMMENDATIONS. \ \ \ + + + + • I \ - I I 0 \ I I �j O ►O MYRICA CALIFORNICA / PACIFIC WAX MYRTLE 51 2 GAL. + _ Y I I + I O CUSTOM EMERGENT SEED MIX + + °\' \ \ \+ + + + + + + + OEMLERIA CERASIFORMIS / INDIAN PLUM 45 2 GAL. AVAILABLE FROM SUNMARK SEEDS CO., PORTLAND, OR _ + + \ \+ � I I \ Z ROSA GYMNOCARPA / BALDHIP ROSE 92 1 GAL. APPLICATION RATE: 22 LBS PER ACRE \ o+ + + + + + � +`+ + + + ++ + + + + I + I I I I \ m \ I I I I I--i 06 • ROSA PISOCARPA / SWAMP ROSE 28 1 AL. SPECIES %BY WEIGHT SCIRPUS MICROCARPUS 25/ JUNCUS EFFUSUS 25% _ A + + + + + + -+ + + + + +I + I T O � r O r PARVIFLORUS /THIMBLEBERRY 52 1 GAL. JUNCUS ENSIFOLIUS 25%O ++++ I+ \ IOO C:)RUBUS RUBUS SPECTABILIS / SALMONBERRY 54 1 GAL. JUNCUS TENUIS 25/ + +\o + + + t+ + + ++ + + \ I I I I 7 I I I �C)O 06 � C:)G RACEMOSA / RED ELDERBERRY 68 1 GAL. OTHER PLANTING BY OTHERS, SEE LANDSCAPE ARCHITECTURE PLANS + + + �+ + + + �° N CO C)WSAMBUCUS N�+ SPIRAEA DOUGLASII / SPIRAEA 37 1 GAL. ca SPLIT RAIL FENCE WITH CITY APPROVED SENSITIVE AREA SIGN I I \I I I I I ++ I+ +\+ + + + ++ + I++` + + ++\+ O+ +l +\ +++ ++I++ ++ m a \ v� me ,\ +\ \ m a \ I I \ I\ I I I I I z Q L.L — Q L.L r Q N O O O M TCHLINE A + a �o cn I i Wc ++ I+ ++ I m I + I �— z NO o ++ + ++ +/ 10 WETLAND + + ++++ + TI '\ �Q C:)+ w+ ' I + ++I+ +++I ++/ + RMC CAT. 2 WETLAND BUFFER LINE + +I + +++ +++/+ /+ + + + I — 0 W+ \II cn ++ + ++ + + + + EASEMENT LINE. 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ACCORDINGLY. co�) 2+`- _ — —\ • // + + + ++ + + \ I I I I I I PROJECT DESIGNED: MANAGER: N++++ NL/MF w Z+++ I N E E ,'ll I + + ++ o� I I I LL i I + + I + + # + + + o o I I I I I I I I \ DRAFTED: CHECKED: MF NL/AS M M \ \ I+ ° \\ \ JOB NUMBER: m zW I +++ + m e M TCHLINE A \ M lCHLN B W oLLc a Z\ MITIGATION PLANTING PLAN 0 10' 20' 40' 80' SHEET NUMBER: ZEr a 2 DRAFT - NOT FOR CONSTRUCTION W3 OF 6 wN N SCALE I"=2o' © Copyright- The Watershed Company o MITIGATION PLANTING PLAN (CONY. SCALE 1 "= 20' PLANT INSTALLATION SPECIFICATIONS 'N!!g ill INIII M21rov0 ,LITY ASSURANCE PLANTS AND SEEDS SHALL MEET OR EXCEED THE SPECIFICATIONS OF FEDERAL, STATE, AND LOCAL LAWS REQUIRING INSPECTION FOR PLANT DISEASE AND INSECT CONTROL. PLANTS SHALL BE HEALTHY, VIGOROUS, AND WELL -FORMED, WITH WELL DEVELOPED, FIBROUS ROOT SYSTEMS, FREE FROM DEAD BRANCHES OR ROOTS. PLANTS IN LEAF SHALL BE WELL FOLIATED AND OF GOOD COLOR. PLANTS SHALL BE HABITUATED TO THE OUTDOOR ENVIRONMENTAL CONDITIONS INTO WHICH THEY WILL BE PLANTED (HARDENED -OFF). PLANTS AND SEEDS SHALL BE FREE FROM DAMAGE CAUSED BY TEMPERATURE EXTREMES, LACK OR EXCESS OF MOISTURE, INSECTS, DISEASE, AND MECHANICAL INJURY. TREES WITH DAMAGED, CROOKED, MULTIPLE OR BROKEN LEADERS WILL BE REJECTED. WOODY PLANTS WITH ABRASIONS OF THE BARK OR SUN SCALD WILL BE REJECTED. NOMENCLATURE: PLANT NAMES SHALL CONFORM TO FLORA OF THE PACIFIC NORTHWEST BY HITCHCOCK AND CRONQUIST, UNIVERSITY OF WASHINGTON PRESS, 1973 AND/OR TO A FIELD GUIDE TO THE COMMON WETLAND PLANTS OF WESTERN WASHINGTON & NORTHWESTERN OREGON, ED. SARAH SPEAR COOKE, SEATTLE AUDUBON SOCIETY, 1997. INITIONS PLANTS/PLANT MATERIALS. PLANTS AND PLANT MATERIALS SHALL INCLUDE ANY LIVE PLANT MATERIAL USED ON THE PROJECT. THIS INCLUDES BUT IS NOT LIMITED TO CONTAINER GROWN, B&B OR BAREROOT PLANTS; LIVE STAKES AND FASCINES (WATTLES); TUBERS, CORMS, BULBS, ETC..; SPRIGS, PLUGS, AND LINERS. CONTAINER GROWN. CONTAINER GROWN PLANTS ARE THOSE WHOSE ROOTBALLS ARE ENCLOSED IN A POT OR BAG IN WHICH THAT PLANT GREW. STITUTIONS IT IS THE CONTRACTOR'S RESPONSIBILITY TO OBTAIN SPECIFIED MATERIALS IN ADVANCE IF SPECIAL GROWING, MARKETING OR OTHER ARRANGEMENTS MUST BE MADE IN ORDER TO SUPPLY SPECIFIED MATERIALS. SUBSTITUTION OF PLANT OR SEED MATERIALS NOT ON THE PROJECT LIST WILL NOT BE PERMITTED UNLESS AUTHORIZED IN WRITING BY THE CITY OF RENTON. IF PROOF IS SUBMITTED THAT ANY PLANT OR SEED MATERIAL SPECIFIED IS NOT OBTAINABLE, A PROPOSAL WILL BE CONSIDERED FOR USE OF THE NEAREST EQUIVALENT SIZE OR ALTERNATIVE SPECIES, WITH CORRESPONDING ADJUSTMENT OF CONTRACT PRICE. SUCH PROOF WILL BE SUBSTANTIATED AND SUBMITTED IN WRITING TO THE PROFESSIONAL AT LEAST 30 DAYS PRIOR TO START OF WORK UNDER THIS SECTION. 'ECTION PLANTS AND SEEDS SHALL BE SUBJECT TO INSPECTION AND APPROVAL BY THE RESTORATION PROFESSIONAL FOR CONFORMANCE TO SPECIFICATIONS, EITHER AT TIME OF DELIVERY ON -SITE OR AT THE GROWER'S NURSERY. APPROVAL OF PLANT OR SEED MATERIALS AT ANY TIME SHALL NOT IMPAIR THE SUBSEQUENT RIGHT OF INSPECTION AND REJECTION DURING PROGRESS OF THE WORK. PLANTS OR SEEDS INSPECTED ON SITE AND REJECTED FOR NOT MEETING SPECIFICATIONS MUST BE REMOVED IMMEDIATELY FROM SITE OR RED -TAGGED AND REMOVED AS SOON AS POSSIBLE. 3. THE RESTORATION PROFESSIONAL MAY ELECT TO INSPECT PLANT MATERIALS AT THE PLACE OF GROWTH. AFTER INSPECTION AND ACCEPTANCE, THE RESTORATION PROFESSIONAL MAY REQUIRE THE INSPECTED PLANTS BE LABELED AND RESERVED FOR PROJECT. SUBSTITUTION OF THESE PLANTS WITH OTHER INDIVIDUALS, EVEN OF THE SAME SPECIES AND SIZE, IS UNACCEPTABLE. MEASUREMENT OF PLANTS 1. PLANTS SHALL CONFORM TO SIZES SPECIFIED UNLESS SUBSTITUTIONS ARE MADE AS OUTLINED IN THIS CONTRACT. 2. HEIGHT AND SPREAD DIMENSIONS SPECIFIED REFER TO MAIN BODY OF PLANT AND NOT BRANCH OR ROOT TIP TO TIP. PLANT DIMENSIONS SHALL BE MEASURED WHEN THEIR BRANCHES OR ROOTS ARE IN THEIR NORMAL POSITION. 3. WHERE A RANGE OF SIZE IS GIVEN, NO PLANT SHALL BE LESS THAN THE MINIMUM SIZE AND AT LEAST 50% OF THE PLANTS SHALL BE AS LARGE AS THE MEDIAN OF THE SIZE RANGE. (EXAMPLE: IF THE SIZE RANGE IS 12" TO 18", AT LEAST 50% OF PLANTS MUST BE 15" TALL.). SUBMITTALS PROPOSED PLANT AND SEED SOURCES 1. WITHIN 45 DAYS AFTER AWARD OF THE CONTRACT, SUBMIT A COMPLETE LIST OF PLANT AND SEED MATERIALS PROPOSED TO BE PROVIDED DEMONSTRATING CONFORMANCE WITH THE REQUIREMENTS SPECIFIED. INCLUDE THE NAMES AND ADDRESSES OF ALL GROWERS AND NURSERIES. PRODUCT CERTIFICATES 1. PLANT AND SEED MATERIALS LIST - SUBMIT DOCUMENTATION TO PROFESSIONAL AT LEAST 30 DAYS PRIOR TO START OF WORK UNDER THIS SECTION THAT PLANT AND SEED MATERIALS HAVE BEEN ORDERED. ARRANGE PROCEDURE FOR INSPECTION OF PLANT AND SEED MATERIAL WITH PROFESSIONAL AT TIME OF SUBMISSION. 2. HAVE COPIES OF VENDOR'S OR GROWERS' INVOICES OR PACKING SLIPS FOR ALL PLANTS AND SEEDS ON SITE DURING INSTALLATION. INVOICE OR PACKING SLIP SHOULD LIST SPECIES BY SCIENTIFIC NAME, QUANTITY, AND DATE DELIVERED (AND GENETIC ORIGIN IF THAT INFORMATION WAS PREVIOUSLY REQUESTED). DELIVERY, HANDLING, & STORAGE NOTIFICATION CONTRACTOR MUST NOTIFY PROFESSIONAL 48 HOURS OR MORE IN ADVANCE OF DELIVERIES SO THAT PROFESSIONAL MAY ARRANGE FOR INSPECTION. PLANT AND SEED MATERIALS 1. TRANSPORTATION - DURING SHIPPING, PLANTS AND SEEDS SHALL BE PACKED TO PROVIDE PROTECTION AGAINST CLIMATE EXTREMES, BREAKAGE AND DRYING. PROPER VENTILATION AND PREVENTION OF DAMAGE TO BARK, BRANCHES, AND ROOT SYSTEMS MUST BE ENSURED. 2. SCHEDULING AND STORAGE - PLANTS AND SEEDS SHALL BE DELIVERED AS CLOSE TO PLANTING AS POSSIBLE. PLANTS AND SEEDS IN STORAGE MUST BE PROTECTED AGAINST ANY CONDITION THAT IS DETRIMENTAL TO THEIR CONTINUED HEALTH AND VIGOR. 3. HANDLING - PLANT MATERIALS SHALL NOT BE HANDLED BY THE TRUNK, LIMBS, OR FOLIAGE BUT ONLY BY THE CONTAINER, BALL, BOX, OR OTHER PROTECTIVE STRUCTURE, EXCEPT BAREROOT PLANTS SHALL BE KEPT IN BUNDLES UNTIL REMOVE FROM POT & ROUGH -UP ROOT BALL BEFORE INSTALLING. UNTANGLE AND STRAIGHTEN CIRCLING ROOTS - PRUNE IF NECESSARY. IF PLANT IS EXCEPTIONALLY ROOT -BOUND, DO NOT PLANT AND RETURN TO NURSERY FOR AN ACCEPTABLE ALTERNATIVE 4" MULCH DEPTH RING AS SPECIFIED. HOLD BACK MULCH FROM TRUNK/STEMS. FINISH GRADE AS SPECIFIED SOIL AMENDED AND TILLED AS SPECIFIED. REMOVE DEBRIS AND LARGE ROCKS FROM PLANTING PIT AND BACKFILL WITH SPECIFIED SOIL. FIRM UP SOIL AROUND PLANT. NOTES: 1. PLANTING PIT SHALL NOT BE LESS THAN (2) TIMES THE WIDTH OF THE ROOT BALL DIA. 2. LOOSEN SIDES AND BOTTOMS OF PLANTING PIT 3. SOAK PLANTING PIT AFTER PLANTING TCHLINE C (---,� CONTAINER PLANTING DETAIL Scale: NTS NOTES: 1. PLANTING PIT SHALL NOT BE LESS THAN TWO TIMES WIDTH OF ROOTBALL 2. LOOSEN ROOT -BOUND PLANTS BEFORE PLANTING 3. SOAK PLANTING PIT BEFORE AND AFTER PLANTING �, PLANTING AND THEN HANDLED CAREFULLY BY THE TRUNK OR STEM. 4. LABELS - PLANTS AND SEEDS SHALL HAVE DURABLE, LEGIBLE LABELS STATING CORRECT SCIENTIFIC NAME AND SIZE. TEN PERCENT OF CONTAINER GROWN PLANTS IN INDIVIDUAL POTS SHALL BE LABELED. PLANTS SUPPLIED IN FLATS, RACKS, BOXES, BAGS, OR BUNDLES SHALL HAVE ONE LABEL PER GROUP. PLANT AND SEED WARRANTY PLANTS AND SEEDS MUST BE GUARANTEED TO BE TRUE TO SCIENTIFIC NAME AND SPECIFIED SIZE, AND TO BE HEALTHY AND CAPABLE OF VIGOROUS GROWTH. REPLACEMENT 1. PLANTS OR SEEDS NOT FOUND MEETING ALL OF THE REQUIRED CONDITIONS MUST BE REMOVED FROM SITE AND REPLACED IMMEDIATELY AT THE PROFESSIONAL'S DISCRETION. 2. PLANTS NOT SURVIVING AFTER ONE YEAR TO BE REPLACED 3. SEEDED AREAS FOUND BARE AFTER ONE YEAR TO BE RE -SEEDED. PLANT AND SEED MATERIAL GENERAL 1. PLANTS AND SEEDS SHALL BE NURSERY GROWN IN ACCORDANCE WITH GOOD HORTICULTURAL PRACTICES UNDER CLIMATIC CONDITIONS SIMILAR TO OR MORE SEVERE THAN THOSE OF THE PROJECT SITE. 2. PLANTS AND SEEDS SHALL BE TRUE TO SPECIES AND VARIETY OR SUBSPECIES. NO CULTIVARS OR NAMED VARIETIES SHALL BE USED UNLESS SPECIFIED AS SUCH. QUANTITIES SEE PLANT LIST ON ACCOMPANYING PLANS AND PLANT SCHEDULES. ROOT TREATMENT 1. CONTAINER GROWN PLANTS (INCLUDES PLUGS): PLANT ROOT BALLS MUST HOLD TOGETHER WHEN THE PLANT IS REMOVED FROM THE POT, EXCEPT THAT A SMALL AMOUNT OF LOOSE SOIL MAY BE ON THE TOP OF THE ROOTBALL. 2. PLANTS MUST NOT BE ROOT -BOUND; THERE MUST BE NO CIRCLING ROOTS PRESENT IN ANY PLANT INSPECTED. 3. ROOTBALLS THAT HAVE CRACKED OR BROKEN WHEN REMOVED FROM THE CONTAINER SHALL BE REJECTED. i PROVIDE A 2.5-3" ROUND TREE STAKE MADE OF UNTREATED LUMBER. ANGLE AGAINST PREVAILING WINDS AND DEEP ENOUGH TO BE STABLE. ATTACH TREE STAKES TO TRUNK WITH PLASTIC "CHAIN -LOCK" OR EQUAL HIGH DENSITY POLYETHYLINE TREE TIE MATERIAL. PROVIDE 1" OF SLACK TO 3 ACCOMODATE TREE GROWTH. SET TRUNK PLUMB THE WATERSHED - COMPANY 750 Sixth Street South Kirkland WA 98033 p 425.822.5242 www.watershedco.com Science & Design O 00 r O O CO O d z 06 r I--� z O r z � O _ .. 0 00 U) N Q w O 00 ��yy � 0-5z Q L.L r Q W 0 N 3: z Q 0� Q O �o 0wNz LL G LLJ CD 0 O w O d_ O Q (O w O z J W U Q n >_ LL LL LL LL LL LL m� 2 2 2 2 2 w PROVIDE MULCH PER PLAN, BUT DO w NOT PILE MULCH AROUND THE BASE Z z z �4j OF THE TRUNK/STEM. Q Q i J U) Z Z / LI O O 06 0 0 FINISHED GRADE Q - - � � J2 2 2U) U) > Q z z Q Q o SOAK PLANTING PIT, O > > w SCARIFY EDGES OF PIT, — a Q U) AND REMOVE DEBRIS 120 z_ U U g a a 'o U / Z) U) J Z Z w w O O W W W �i w WT r T r"I T T T T N O 4 r N O r N �M r Co Co Oi O O O O O O r r BACKFILL PLANTING PIT I PREVIOUSLY AMENDED SOIL Z r N M �n m 2 X ROOTBALL WIDTH — COMPACT SOIL TO PREVENT SETTLING B&B PLANTING DETAIL Scale: NTS PLANT INSTALLATION DETAILS AND NOTES DRAFT - NOT FOR CONSTRUCTION 0 10' 20' 40' SHEET NUMBER: © Copyright- The Watershed Company W4 OF 6 SHEET SIZE: ORIGINAL PLAN IS 22" x 34" SCALE ACCORDINGLY. w PROJECT MANAGER: NL Z DESIGNED: NL/MF LL DRAFTED: MF CHECKED: NL/AS JOB NUMBER: mw J_ Wz Z� a < Uj N Q N o� .. 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The work required under this Section will include all labor, tools, materials, equipment, and incidentals required for: a temporary irrigation system installation, operation and its maintenance. 1.02 Delivery, handling and storage A. Contractor shall ensure all materials are delivered to the site at appropriate times for installation. All materials delivered to the site shall be protected from the elements until installation. Care shall be taken to protect all items during transit and on the job site. Contractor shall replace at his own expense any items damaged from improper storage or handling. 1.03 WARRANTY A. Temporary Irrigation System: Contractor shall warranty and replace all parts, ensure adequate water coverage and supply, and maintain the irrigation system from the time of installation to minimally the end of the Plant Establishment Period (refer to 32 93 00 for more information on the Plant Establishment Period) or longer if preferred by the City of Renton. PRODUCTS 2.01 Manufacturers A. Contractor shall procure irrigation system's components from established firms capable of producing premium quality products and materials as required for the complete installation. 2.02 Materials A.Temporary Irrigation System: Furnish a bidder -designed system of above -ground piping and sprinklers with control valves for the temporary irrigation of all mitigation planting areas. System shall be capable of evenly distributing appropriate water amounts, a minimum of two inches per week, from June 1 through September 30. B. System Components: 1. Water Supply: Water supply shall be clean, free of suspended particles, algae, or chemicals that may form insoluble precipitates in the equipment or may be detrimental to plantings 2. On -Grade Systems: All on -grade lines shall be secured to slopes every ten feet. The ends of all laterals shall also be secured. Staples or any other material used to secure system shall be installed so as not to create a safety hazard, and avoid damage to surrounding vegetation and root systems. 3. Spray Systems: Spray heads shall be selected to provide uniform coverage over entire area of spray at available water pressure. Sprinkler -to -sprinkler dimensions should be based on manufacturer's recommendations and throw radii of the sprinklerheads. Head to head coverage shall be provided. a. Spray heads of different manufacturers or of different basic types shall have consisitent operating characteristics on any single lateral circuit. b. Spray heads on the same lateral circuit shall be balanced for matched precipitation rates 4. Control System: The controller shall be automatic and battery operated. Controller units shall be enclosed in secure, weather and vandal resistant, locking housings manufactured expressly for that purpose or located within a structure. Controller cabinets shall not be installed within an irrigation spray pattern. a. Provide new batteries in controllers 5. Piping: All above grade lateral lines, mainlines, and fittings shall be Polyvinyl Chloride (PVC) pipe. 0 50' 100' 200' 400' NEI WIN 6. Backflow preventor: Backflow preventor must be installed when working with potable water. Provide backflow preventor to suit irrigation system, complying with applicable codes. System shall be installed above ground. 7. Emergency Shutoff Valves: Globe or ball valves shall be provided at points of connection and labeled. 8. Pressure Regulation: A pressure -reducing valve shall be installed between the irrigation meter and the first control valve. The regulator shall be adjusted so that water pressure does not exceed the system component manufacturer's recommendations for the irrigation system components. Additional pressure compensating devices may be necessary to meet equipment manufacturer's specifications. 9. T-Posts: Steel T-posts to stake and secure sprinklers on risers, length shall be 4' above grade minimum. 10. Staples: U shape metal staples, eight inches long minimum to secure pipes. 11. Meter: Provide an irrigation meter, if required by the City of Renton. EXECUTION 3.01 Execution A. Contractor shall install a temporary, above -ground, irrigation system to provide full coverage to all plants within the mitigation planting areas. B. Point of Connection: Connect to water supply source. Install components necessary including meter and backflow preventor, double check valve assembly, and irrigation meter (if applicable) as necessary to comply with applicable codes. C. Control Valves: Install to irrigate the specific area as shown on Mitigation Plans. D. Piping: Seure piping in place at ten foot spacing. E. Sprinkler heads: Install sprinklers on risers at a 4' minimum above -ground height and strap to a T-post buried 18" minimum and extending to the point of sprinkler attachment. F. Water Conservation Performance: Slopes with a gradient of 3:1 or steeper and greater than six feet in height that are irrigated with an overhead spray system must have a precipitation rate no greater than 0.65 inches per hour. G.Field testing: Contractor shall test the system for inspection by the Restoration Specialist at the time of installation or at the beginning of the next growing season. The amount of irrigation must be adjusted when warranted by site conditions. H. Remove all temporary irrigation equipment at the end of plant establishment period, unless directed otherwise by the Restoration Specialist or City of Renton 3.02 MAINTENANCE A.Temporary Irrigation System: Contractor is responsible for maintaining the irrigation system from the time of installation to the conclusion of the Plant Establishment Period (refer to 32 93 00 for more information on the Plant Establishment Period). During that time, the contractor shall perform routine maintenance to ensure successful operation of the system. Maintenance shall include winterization of the system which shall be blown out by October 15 to prevent damage to the system from frozen pipes. Prior to the conclusion of the Plant Establishment Period, the Restoration Specialist shall inspect plant material and determine whether or not additional year (s) of irrigation will be required. If additional irrigation is not needed, at the direction of the Restoration Specialist, the contractor shall dismantle the irrigation system and all parts shall be removed from the site at the conclusion of the Plant Establishment Period. DRAFT - NOT FOR CONSTRUCTION © Copyright- The Watershed Company 140121 SHEET NUMBER: W5 OF 6 THE WATERSHED - COMPANY 750 Sixth Street South Kirkland WA 98033 425.822.5242 www.watershedco.com Science & Design O b � z z Q z� ow W two Q LU O Q w U }LL w w w w w w U) w Z Z Z J J a a U) O O w 0 0 0 a W w J 2 2 2 U) o o > > w P: U) w w w!Z a a Z) (t)JZZ ii w0 wo O O wM w� w0� WT T T T T T r r N CD Q M r N O r N r CO CO M O CD O CD CDO r r 00 r O CO r CO 06 r O O 00 Cfl � N � 00 O 0-5 r Q N _ C z O qzt ~ Z o LL1 O 0� 0) d� CO O z w U Q SHEET SIZE: ORIGINAL PLAN IS 22" x 34" SCALE ACCORDINGLY. w PROJECT MANAGER: NIL Z DESIGNED: NL/MF DRAFTED: MF CHECKED: NL/AS JOB NUMBER: W m LL oz z� a < N F N o0 c� 0 Project Summary The proposed project is a 70 lot subdivision spanning four parcels (619900-0101, -0240, -0241, and-0260); utility improvements will extend into adjacent parcels 332305-9010 and -9057, and the 124th Avenue SE right-of-way will be improved for site access. The subdivision and short -plats were vested in 2004 and approved by King County in 2006 and 2007 (Reference Numbers L04P0002, L05S0040, and L04P0027), prior to annexation into City of Renton. The adjacent Soos Creek wetland (Wetland A) was identified during the subdivision/plat approval process; the site is vested to a 100-foot wetland buffer. Table The project will incur unavoidable wetland and wetland buffer impacts. Direct wetland impacts will be temporary in nature and are required to install a sewer connection to an existing line. Permanent wetland buffer impacts will be generated by right-of-way improvements and stormwater outfalls. Associated grading will cause temporary buffer impacts. Mitigation Summary The proposed mitigation plan fulfills the requirements of City of Renton under RMC 4-8-120. All temporary and permanent wetland and wetland buffer impacts require mitigation; mitigation areas and actions are summarized in Table 1 below. All proposed mitigation actions will occur at the impact sites and within the adjacent NGPA tract as shown on this mitigation plan set. Impact Area Mitigation Type/Action Area Ratio 12,950 5F Buffer replacement/addition 19,000 SF 1.47:1 36,750 5F Buffer restoration, in -place 36,750 SF 1:1 3,000 SF Wetland restoration, in -place 3,000 SF 1:1 To mitigate for permanent buffer impacts, buffer replacement and addition is proposed at a 1.47:1 ratio. Permanent buffer impacts are primarily due to road construction and stormwater improvements. To account for buffer fragmentation and associated loss of functions, small buffer pieces west of the new road (3,250 SF total) are tabulated as buffer loss and accounted for in the buffer replacement figure. The proposed buffer addition area is currently vegetated by emergent plants and small shrubs; it is within the BPA corridor. To mitigate for temporary buffer impacts, in -place buffer restoration is proposed at a 1:1 ratio. Where temporary grading impacts overlap with the future Soos Creek Trail footprint, restoration will be limited to application of a grass seed mix. Since that area will ultimately be impacted by trail construction, further planting in the trail footprint is not practical. The remainder of the temporary buffer impact area will be planted with native trees, shrubs, and groundcover plants. Restoration in the BPA corridor will be limited to shrubs and groundcover plants due to vegetation height restrictions in the transmission line corridor. Temporary wetland impacts will be mitigated through in -place restoration. Following pipe installation, the excavated area will be back -filled with wetland soil. Following the vegetation height restrictions for the transmission line corridor, vegetation in the disturbed area will be restored. Restoration within the future Soos Creek Trail footprint (a King County -Parks project) will be limited to grass seed mix. The proposed restoration will provide a compensatory level of protection for the critical area and will offset the disturbance associated with modification of the standard wetland buffer. Mitigation Goals and Objectives 1. Within the proposed restoration areas, establish dense native vegetation that is appropriate to the eco-region and site, as feasible given BPA corridor restrictions and the future Soos Creek Trail alignment. 2. Where indicated on the plan, areas within the restoration area will be substantially vegetated with a preponderance of native plants and will contain little invasive or noxious weed cover. Performance Standards The standards listed below will be used to judge the success of the installation over time. If performance standards are met at the end of Year 5, the site will then be deemed successful and the performance security bond will be eligible for release by the City of Renton. 1) Wetland Buffer a. Survival: Achieve 100% survival of installed tree and shrub plantings by the end of Year 1. This standard can be met through plant establishment or through replanting as necessary to achieve the required numbers. Individual groundcover plantings cannot be feasibly counted. Therefore, groundcovers shall be monitored for areas of obvious mortality and appropriate replacement quantities recommended by the restoration professional to ensure satisfaction of the native cover standard (below). b. Native Cover: i. Enhancement Areas 1. Achieve 60% understory cover of native shrubs and groundcovers by Year 3. Native volunteer species (but not grasses) may count towards this cover standard. 2. Achieve 80% understory cover of native shrubs and groundcovers by Year 5. Native volunteer species (but not grasses) may count towards this cover standard. ii. Grass Seed Areas 1. Establish the grass seed mix and achieve 90% cover by Year 5. Seed mix may be re -applied as necessary. [Once the King County Soos Creek Trail is constructed (as shown), that area will be omitted from this Canyon Terrace Subdivision mitigation plan.] c. Species diversity: Establish at least four native shrub species and three native groundcover species by Year 3 and maintain this diversity through Year 5. Native volunteer species (but not naturalized grasses) may count towards this standard. d. Invasive cover: Aerial cover for all non-native, invasive and noxious weeds within the buffer planting areas will not exceed 10% at any year during the monitoring period. Invasive plants include ivy species (Hedera spp.), Himalayan blackberry (Rubus armeniacus), cut leaf blackberry (Rubus laciniatus), and reed canarygrass (Phalaris arundinacea). Invasive plants are defined as those listed by the Washington State Noxious Weed Control Board as Class A, B, or C. 2) Wetland Restoration a. Survival: The shrub species shall achieve 100% survival by the end of Year 1, 80% by the end of Year 3, and 60% by the end of Year 5. MITIGATION NOTES b. Invasive cover: Aerial cover for all non-native, invasive and noxious weeds within the buffer planting areas will not exceed 20% at any year during the monitoring period. Invasive plants include Himalayan blackberry (Rubus ormeniacus), and reed canarygrass (Phalaris arundinacea). Invasive plants are defined as those listed by the Washington State Noxious Weed Control Board as Class A, B, or C.Invasive plant cover standards differ for the wetland buffer (1.d) and the wetland restoration area. Due to the presence of a reed canarygrass (RCG) monoculture, the wetland restoration area has a higher 20 percent threshold for invasive plant cover. As documented in the Ecology publication number 06-06-011a, Wetland Mitigation in Washington State - Part 1: Agency Policies and Guidance, the 10 percent cover threshold is generally not practical at sites dominated by RCG and does not align with the intent of the invasive species cover standard. Monitoring Program Monitoring Methods This monitoring program is designed to track the success of the mitigation site over time and to measure the degree to which it is meeting the performance standards outlined in the preceding section. An as -built plan will be prepared by the restoration professional (The Watershed Company [(425) 822-5242], or other persons qualified to evaluate environmental restoration projects) prior to the beginning of the monitoring period. The as -built plan will be a mark-up of the planting plans included in this plan set. The as -built plan will document any departures in plant placement or other components from the proposed plan. During the as -built inspection, the monitoring restoration professional shall install monitoring transects in the wetland buffer restoration areas and establish photo points. Approximate transect and photo point locations shall be marked on the as -built plan. At least five 100-foot transects shall be established in the mitigation area. Monitoring will take place quarterly for the first year and twice annually after that. The City of Renton requires quarterly reports in year one and annual reports in subsequent monitoring years. Monitoring will be conducted in spring and late summer/early fall annually in years two through five. Site performance will be summarized in annual reports due to the City each winter. Monitoring will commence following as -built acceptance by the City. Spring Monitoring The spring maintenance inspection shall include the following, reported in a brief memo submitted to the property owner and/or maintenance crews: 1) Conduct a weed and maintenance inspection in the spring to identify any maintenance needs necessary to prepare the site for the upcoming growing season. 2) Summarize findings in a spring maintenance memo for the responsible party. Late Summer/Fall Monitoring The formal monitoring visit shall record and provide the following in an annual report submitted to the City of Renton: 1) Summary of the spring maintenance visit recommendations. 2) Visual assessment of the overall site. 3) Year 1 counts of live and dead plants by species (wetland and buffer). Annual counts of restoration plantings (wetland area only). 4) Counts of dead plants where mortality is significant in any monitoring year. 5) Estimate of native shrub cover using the line -intercept method along established transects. All planted areas not directly covered by transects will be visually assessed and noted as to how they are meeting the performance standards. 6) Visual estimate of native groundcover. 7) Estimate of non-native, invasive weed cover within planting areas using the line -intercept method and/or visual estimates are practical; estimate invasive cover in wetland restoration and buffer mitigation areas separately. 8) Tabulation of established native species, including both planted and volunteer species. 9) Photographic documentation from fixed reference points or transect ends. 10) Any intrusions into or clearing of the planting areas, vandalism, or other actions that impair the intended functions of the mitigation area. 11) Recommendations for maintenance or repair of any portion of the mitigation area. Site Maintenance Requirements The site will be maintained in accordance with the following instructions for five years following completion of the construction. 1) Follow the recommendations noted in the previous monitoring site visit and the spring maintenance memo. 2) General weeding for all planted areas: a. At least twice yearly, remove all competing weeds and weed roots from beneath each installed plant and any desirable volunteer vegetation to a distance of 18 inches from the main plant stem. Weeding should occur at least twice during the spring and summer. Frequent weeding will result in lower mortality, lower plant replacement costs, and increased likelihood that the plan meets performance standards by Year 5. b. More frequent weeding may be necessary depending on weed conditions that develop after plan installation. c. Do not weed the area near the plant bases with string trimmer (weed whacker/weed eater). Native plants are easily damaged or killed, and weeds easily recover after trimming. 3) Apply slow release granular fertilizer to each installed plant annually in the spring (by June 1) of Years 2 through 5. 4) Replace mulch as necessary to maintain a 4-inch-thick layer, retain soil moisture, and limit weeds. 5) Replace dead plants found in the summer monitoring visits during the upcoming fall/winter dormant season (October 15 to March 1) or at the direction of the restoration professional. Re -apply grass seed mix in any bare areas per plan. 6) Provide bidder -designed, above -ground irrigation for the entire planted area with a minimum of 2 inches of water provided per week from June 1 through September 30 for at least the first two years following installation through the operation of a temporary irrigation system. Less water is needed during March, April, May and October. Contingency Plan THE ED TERSH If there is a significant problem with the mitigation areas meeting performance standards, a contingency plan will WATERSHED H be developed and implemented. Contingency plans can include, but are not limited to: soil amendment; additional PANY plant installation; and plant substitutions of type, size, quantity, and location. Plant substitutions must be approved by the City of Renton. 750 Sixth Street South Site Protection Kirkland WA 98033 The wetland area will remain under King County Parks ownership. Fencing and/or wetland signs will be installed 425.822.5242 along high -traffic areas at the on -site wetland buffer. www.watershedco.com Science & Design Construction Notes and Specifications General Work Sequence 1. Prepare the planting areas: O a. Buffer Restoration 00 i. a) remove gravel, garbage, and debris; b) clear all Himalayan blackberry from the planting area, making sure r O to remove the roots; c) roto-till to de -compact soil and d) incorporate two inches of compost into the O buffer restoration area (within the buffer only). Cfl ii. All plant installation is to take place during the dormant season (October 15th -March 1st), for best survival. O bO rn b. Wetland Restoration ~ Z r Cfl i. Stockpile excavated wetland soil (do not stockpile within the wetland) ~ r ii. Back -fill excavated area with the wetland soil when pipe installation is complete I--1 Z O iii. All plant installation is to take place during the dormant season (October 15th - March 1st), for best n � r Oi survival. ^ MM Z 2. Prepare a planting pit for each plant and install per the planting details. F-�-I Q (500 3. Apply mulch rings around each installed tree and shrub with wood chip mulch, four inches thick, 18 inches in J 0— U) (fl N C:) DD diameter. 0 w O � O 4. Install a bidder -designed, temporary, above ground irrigation system to provide full coverage to all plants Z Q 0 r Q within the restoration area. LD w 0 T 5. Apply grass seed mix per plan. G 0 O Z Q Q 0 Specifications 00 p 1. Compost: Cedar Grove Compost or equivalent product. 100% vegetable compost with no appreciable �wN~ ~ Z quantities of sand, gravel, sawdust, or other non -organic materials. ��TT�� O LI..I 2. Fertilizer: Slow release, granular PHOSPHOROUS -FREE fertilizer. Follow manufacturer's instructions for CC application. Keep fertilizer in a weather -tight container while on site. Note that fertilizer is to be applied only G w C) in Years 2 through 5 and not in the first year. �J O 3. Irrigation system: Automated system capable of delivering at least two inches of water per week from June 1 O Q through September 30 for the first two years following installation. 0— . . 4. Restoration Professional: The Watershed Company [(425) 822-52421 personnel, or other persons qualified to w 0 evaluate environmental restoration projects. Z S. Wood chip mulch: Arborist chips (chipped woody material) approximately 1 to 3 inches in maximum J dimension (not sawdust or coarse hog fuel). This material is commonly available in large quantities from LU arborists or tree -pruning companies. This material is sold as "Animal Friendly Hog Fuel" at Pacific Topsoils 0 [(800) 884-7645]. Mulch must not contain appreciable quantities of garbage, plastic, metal, soil, and dimensional lumber or construction/demolition debris. Q 6" x 6" ROUGH CUT, SPLIT, CEDAR POST NOTCHED TO CONTAIN AND CONCEAL RAIL CONNECTION 2 X 6 ROUGH CUT, SPLIT, CEDAR RAILS = Z 00 T C 12" }w w w w w w m 2 2 2 2 2 2 0 w U) w U7 � 71 Z Z CHAMFER TOP OF O Q POSTS 45 DEGREES TO C0 a Z00 a Z A DEPTH OF 1" ON ALL > FOUR SIDES. � Q Q ATTACH CITY APPROVED 06 (5 (7 PRE-PRINTED METAL SIGN Q - 2 - w w TO POST WITH TWO g" DIA. J Q Z Z J J U) U) GALVANIZED CARRIAGE O Lu BOLTS. SEE PLANS FOR a- Q a- a- w w SIGN LOCATIONS. Fr w Z w U w- U a a FINISHED GRADE U c) wo _J wo Z O Z O 0� W > wu > wu w ~ T r T r T T N T C) T qt M r N O r N Z r N ('M 't X) CO COMPACTED GRAVEL BASE. NO CONCRETE IS TO BE PLACED IN SENSITIVE AREAS. SHEET SIZE: COMPACTED SUBGRADE ORIGINAL PLAN IS 22" x 34" SCALE ACCORDINGLY. SPLIT RAIL FENCE WITH COR SENSITIVE AREA SIGN Scale: NTS DRAFT - NOT FOR CONSTRUCTION © Copyright- The Watershed Company 140121 SHEET NUMBER: W6 OF 6 W PROJECT MANAGER: NL Z DESIGNED: NL/MF DRAFTED: MF CHECKED: NIL/AS JOB NUMBER: W m LL W Z Z M a < N Q N Q O .. z