Loading...
The URL can be used to link to this page
Your browser does not support the video tag.
Home
My WebLink
About
SWP273170(4)
x 4 Y i ` 1 � i w Z U d W O Z_ : J w WV) O W U ^/ �Nfpp Wa { r Jw0^ r W - a41N fL.L Wo WO <� O U 1 0 �- _ __ W _6 LLJ a W LL Z � 0 l 0 Z J L u Y Q O fff w N n 3 L m s , _ O vo yl QL� C� Z jW�j5 L � v '0 m V661 n►ga3:a1EQ M 00 c r- .. U 6 w W =30 : + (rJg m Z — -i s 0 ZZg W UZW • O � o _ g a J + In W g iiJ J s �o 4 uw N Z °� 0 J vl U) o z'<00 F W Q D � [C ° 8 2 za o _ � + v aC V Z r ZS O w 3 ON r 0 r� � m ~arN 1 (n �- ° W LO r Q Eo� 7'SL+OS :cys W w W m I U o a � d Z is< oz�pp CD WO W I. �!( < M wm m F 0 O F ww WU N U Z J Q 4�3106 O �zW~ WJW p C O I' WT \ y� N � 1 H a g f W � 'mp3p0�� LL 44 I I IOz ! I INZm 3 F mis �Mmw 111101 Issim 111101 • A f 17 n � AIDNIG6000V 31VOS HONI 3NO ION.41 '3ZIS I'11)J IV ,^ u HON 3 -1 rf'�J Q �O rNn_� U=_ 09+L9 V1S 3NI-IHD1VW O) O LO W ~ U) 0 I — a ir U) I- a O Z ~ Q O £ to Z N O ^J LO 1L Q H oW of to cd => W J a U N > C > N 0 o o U C k C ID n O a > N Ln .N ,wa O W I cn � I � Vw I I Ziis; <gg Z cit:F jr m 0 =OR U �0 o �LL 1SIX3 ISIX3 - 0. oo . n ^_m o r CW U WW ------ I -- --T- --�I- ----- - O O i 0 a U z � " C0 m W OV ZU 2 ��=a i;i 7d {W and Nat 4 W K 0 ) = a a z w O w W a p w0 _ 3 d Z J z 0 0 o z z o i W a m W O w K 3 V ZOZUJ Z F N N O Z J W z_ Z U NvZ Z O w � w Z o� a ~ J K O O c'� Xa� Q ° z zN i i a3 a ZOUW D:O NZ m Z z� Nw N Z, Z Nj o Za- JZ W Z N W I- p W N W F' f/1 Z OZ W Q W N O ¢¢Wy4 QQN N¢ W UO Z UZ W - UW UZ - p< Wd W¢ Zp ^b Omwp ~ !-'W UJ zx WZ W- Z¢ O Zr 1- a Zow W Za Zoa W Z� Zpl'- N FJ i Z� o� E+I Z J Z pin V W J U O J V 3 80 w J O N N cac�a� O O 2 Z I"-' �a W ¢a rxz �Za �7d w° aa.L) 09+ I S. x ( I I N I I \ in 0p J I � 3„ 6Z,6Z.88 S °' Q C I is SLC 'M 'S W _ i } OS--ZI 0 -M" M ,.Ol I I� Iz z I O. ppNn (f m,+,: Cc,Z OM •.19f. 3 � I � d �i c I I •�.T.: I N m I I Obi II II II � I I I I < J �31 I i rQ w� I I I W o o x•8 i i V) I OON U T I 4 J � Z �� I b W _2 o 0,N O i 0 i I i0 •:•• aV=IZ \ = 4l1 `\ ' I Z* :::• LL I \ Q\\ I I / s I 3 I x I 0� / L RI I n F a O I Z / O 01, wUn0 zooms+ z pr�N<- : • w I 1- ' Z f W I 0I � O�ryOtOU I I I000:m^O a `zwwow, {{{ I I O } s :fir. oo I I L + I ' 3V8 ¢Zl S '0 b/l 3S N r: 3b 'Zl Sa'D df I I o ' as „ZI o pp l31 w F N o o w' wyw a w(o 07NZW D � o zN U WZ�MaDN oo 2UD:NZW n N ...•c J W O Z 7 N .- 0 Z0¢ U~1QN oNoo� ZQ•ON SW m (n a W Y F I I F I coo a I W N O' I 21 (n , m O - I K W w Z po •v r1d0 o a V) � N `v5+0 U xx W ~ h HWX+ Y7 _O Wpm OJ CJ .2 w°d�o I ss ynj �N�i OZ+ W N�n 4 ' \ ~ xoo� z vQwQi mU vai < Zi Z WNW r U NO z N 0'9/ m t 6i 3 x LLJ 3 ~O Q W? r 3 Z fn o .� W z Z r a w z ONZ yv 9 3Fo Z N ow _Z U zzG z w 0 XO m XO z XO W W Q RO W Q X W ~ !/� W f" N W }. Za ow Za ~ N Za H za SK z a. — pV; apO O;ww za O; -� �O O O O O O O O O O O ©© O O O nu+zsl •V 10 =Nnuf-l_1 Vw AIDNIO8000V 31V0S HONI 3NO lON 31 '3ZIS 11f13 1V Og+Z9 V1S gNI'71401VW d N I I 0 d 0w �(if N St,b .S4 Z CIA a , INLLI z� Ll 11 "I NI OS.Z N t Ip ` L) �w U p 40 N « r Z11 N iZ !I o zN o lo WF—W Q mo 'J +11.3 -1 „ wl 0 U) ; 0 �O N H c 7,z I I X Q J i Z p I �< X< I• N a. W I Q d °d 7 U _ w m I Q V - _F -- L'i aNT--L- i 1 Vl _ I I I -0I I d N i • I O ' m O I aa•• d O I .;SO ..I .. O O M F I I + + ui O w I .. O D: a J z J IO p K s :: C1 o go a \ o \ I Ob£'2 vs 3N 0 co - I I NMONNNfI 'MU *.Z �J w I J I I L 01 I 0 0IM b vi I co 0 I � rn aD N I 11 II i II I Q I I a3MOd • x3 131 I Qo aa01 I o + I i I O - _-_- .� L I I j z I I N 3 I it I I w I I = a� m r •••' OS I O l M T� „z X I 00 k~a I I I) � _ id ml < :•7 .iVi~ ; V I a X. I I I o IM O Q J gx LU L > w O § I I p N_ O O Nm N :• O O I I 00 yy I N I It n u I t i 09+L9 'V1S 3NnHOIVN1 09+L9 V1S 3N11HUIVn m U o 0 c :n W 4• in Q W U � O Q) Q Q td 4) 0 L ap a) L U) L N L co 0 11 o a v o a 2 z w w _ F" Z K O ? W m U Z 06 >� V O (n z F o 3 ¢ O � w Z ~ O o V �_ 3 zW. w z VJ sw z I O m Z H w N J a w N 3 W mJ _ JZW za �� Z J O Z W a:? J � J K Q W w� (] w o < w zQv> N OU w wW tnama, ra H N 3 3 NZ C4 7 Oj o. as WOO Q'J 3J Nd U Y3 x ZN Z /"Z O o Z O 1- Z Vl U Z Z� H4 Np Z f U1 Wr OJ O F-Q N pOZZ 8^JJ Qo I j N- w4 W wN X ti X w� wN NV1 Dr i J wa 4J F per`" �cri ,3~}� WZD Z_ U� ZQ V WVW F ZG q Wa z- W? ZK xW pN W WQ Z ZOWo Z� ar Ci p zi -I Z oN , UW Z o4 UO J 25 J oa U o4 UO 39 w N o� Um a OO�Z QN H O U W a O w U W Z 1J �Q K W K W KZ W Z KQ JU J Z Qw W C W Q KU 3o J Bog X ao.Q W o©o000000 �00000 0 )ION106000V 31VOS HONI �— h to p LO 3NO lON 31 '3ZIS'3ZIS i1f13 1V p HONI- 13NO 1 0 �v Ug_ 00+99 V1S 3NI-IHOIVW NN f) ' -1 'l31 1 IX3 1 I -- � o a Z Y U 0 Y lu � ~Z< it Z CY¢ g SO O Hxx ( U ZC O L ANI g 1sIx3 ,� (131 1 dOLU HLIAi H '9Ll NII - N NLNNI1'ANI M, I I I O SKI '1SIX 0 I I 0 I N I 75 gx = OD ( O a z 4 4 I O O Z Z O� U UIL I N XN1 'AN1 I o N � O w I =� I I I I a CL I I I I 0 I �I NN114(1 'ANI �� x I Z� O y I 0 Il I I I m (NMOSO 1SIX3 HOl ) I ?� 51�J 13d .4 '1 X3 I o z I � W C I �6 I OF I I I C RO4 S3N ' 0L 'ANI I I %Dor MOd ' X3 y N I I .z p�� pa U O I I CR O^ (NMO21 '1SIX3 HOl ) �z - Op{t0+£9L 1 LL II I I I 08439 'V1S 3NIIHOIVW 0 W 00 J_ (0 F 0 I ^ - Li. cl O j LQ1j, Y z T L�Fj a 00 Z + Q N .J (D O d Q F- u L� i (0 W E= w� IF YI U F S (3 WW 5 N U C N L N m 0 i 00 a-' U Lo ,,z- vcc� I 0 C N liS 7i� 1 Y I 1 ab a v ay I �� b � d V W� < W 4�.ND omS W l l �I N ��� w In e Y 1 d __-- - r E � < " cli rom`8 m < E +n(V o70 I 1.0< W xwl I I�� W� CD 00 r- 6 V z ... ....... ..... ....... ..... .. 0 . ::y�Onim M ik iF Y3 ....... �iRH �BOL. ......... ......... ........ ......... ......... ......... ......... ...� ...moo n a � :. ...... 69'L6:•q{.�:, .... ...awn ... .. ........ ..... .. .. .. ......... ....... ......... . ......... .....:.:: .i . ......... — a..... _ ... ..... �_ Ln w ......... ... ......... 911: JAMI : ......... ... ... ..... .. ... .. 3LIFlS073 31� :� :d01 3idAF :::: 1 N o+cs:vis: ......... ........ ::' 0 N + _-i LO LL- Lij IL�� z z� ao o Qo O J � n. L N W E gb N N p 1P m 0 aZ SIM cr V ma >ir �U .I *I �I of of II � 4l :O L ® 46/Z l/LO 1391101d �- moo• � h ---}Cb 3„tb17,�7 ±9 SS MAM14OLE TOP= 17.¢5 I NV = 9. 76 (NORTO lr4v = 9.s8.8-i(A"Wr=5r) (Sru6 PE-rt RF-CORD) i I i i I -TOP :15-87 I INV.:13.67 . 80TT._1 2-87 ( 8"N. INTO 24" l W ry Li M N N z co W W Q� to h f� ` O -^ O(nJ� Q J W WN=,� � o I— o CLJ N � N 22 22 3�d riLL_ �ro l O 4i I a I O I Y I ml z o vi Q W Q J W W � 1 = �, x a- W � l 1 - � � LjJ n A i � c Q Li a L) EC a a cfl C rn LU O ILI IV�h I z r p m z o o nf N lit >zw CD LU CL oQ aU¢ '< w x W wz Qtn 'n�w IQ- z0 J d (7 tz Q 0 Ul` Q1x N V) I.V I z zo a Zr W 5;Z Lil W 0 � a � rx z Q 0 0 7 N rn I r„• — r- !6-!:/ 8 �''- OJO sJX3NNO:J iUl� arm �Vd' w 11 Is ra3NNm�� 113e n3?O cc 0 Z , O aJ 0 o a a` W a 0 <t 1 d• i- Y- i• V z be _� 0 1� L a mmm i• r Q O,ti7--_ -gy-ti '" __�. � - .� � • V � 0 _ —� � W SON4/713M 37 /ssoe \ _ y _ 11V h E zV L9NK.. < J2� EA. _--"TD-__. aaa• ,:.-hd 0 a� U_ J J e tl6 —A-I 4 ry __3Q+_._.___ u+,- �r•N'1�'Ld/N '_ j�q[F �3p pr'- —E� T 9a —���i 0__ h 4 M i� ♦ iv »'L 0 .. ... } i btu y 0 u 'k w . i $ . , r N?�6 _ is _ N �1 � p��p�pd.. ='$ .y , f I iQ8'•,�'• � r •..1 W 3 +'7K7@I�I/,'♦ _ pl � ,_ � i 1� •.�f Off` OF SLOPE N •'-� __ 1 W Pj_=SA_ nr2: 4f-.; 1 9' 8� MID GGE OE USN 't01`-t (E`c :.. '� I,� • 0 1 1 ��j %68'0 AA' •r 1 i .I9 lV l^Lizp t 2 zt ,r n.7 p I' CO,;EN Ll Q I I _rn 00 a m W 10 •� I 1 1 t` i m � 1. rc• b —cc I, • m I tI j WA' I ZY II i a Y —off Y 0.cc o ' p l � _ � N � i -y�• iV 'n 0 I tl _ I / OO 0 I rW I _, Y l D O ON00 .i l -.il , t- <� _co Id U I U.nU ®1 U IC+ I V U L^ .. 1••• _ 0 IL 3 ei Im CL fin.—f m"FL Q _1 I� nn { P LdZh xW ry 1 TItH lk L) _ W I w x r— RWICF LTII t;,' ZAs!''iNETO CI v I - I A•E(.1E NTrT G 87V %O BO LIEt. .)-�. T'w U ;;U •L'PO RbI.••� P.ALn 10c . ...._�.;..___.. _..-.__..._.._. —. .r r p • _ �I to W U Cr Z N n W U) p ' ea +n Z u Z. d x rigg Q o�u 4 �p p` I O��O Z' c d 8 � ago ( 0 W h tr I W = C7 _ n ' i �,s eGmzja Fu�ip�p dF I d'a rW. 5 F m q Z JZQ C W LL CL Up •ws wnwwn I- v N F- 7 W �j Q i�.��$$ gg -c o4�SD3iL�i J I Q 04 °° r:.; v, a p• .e a 9° .... __ .. _ _ M — -T0W7 lM 37CIS:id � •'---yayb_—_,__— . O —" ,-----'c o 0 p, g 31 curb � ! _ _ + - � �.N t S -moo: ° _ .� �.�toe�o•: q� ::"�: + �--- -tia :P �,y /[//♦b ._.. _ ; o •ti 4 Wig„• _ tA>S V'1F ..� ;.FF E' iOE OF SLOPE g g 3�:�;'L: _.. •,A. 2 4rSor-- — y.P`••` i`g `� _ ;•r .`;p.i- _ — ,—��+� _P.. ° E� Ic-n Q .��g d a�'�a � _' . • g`g l \c� __...r ,ate -� �"` �+�T F �L � __ _ `�\ ,1iry � • j �' !� a •'r.. + + , t 1 96�' ls?c$,E. � OF sN qn .\ _ iTH ( — _ •� \- ` F V 1. f'. -.._ t/ ENTE > w �n b+41 =\`� LU rz fie U12g9 in 17 ---- a>i �� t� i li W v, uj ,-P,�J .hi' N o c- 11•�I p 1.3.3A g Al 3W3 W � yAtl g. WW1 mm � � v IIn xn , Tii �Z11 ?I ! 1 I —3—3/.IYU Z < 0 'g of iy E �rn \ ✓ f-_ j: g4 I I.. •I; i 1 L J_ LO O � N a.4 on ;L r J= • l u _-• �I � � I tZW LL ' I . - {� 55.0I'� _ 5yH.0 FCC f) ENT RCN Olfj EC NO. 82 ) OIT nCmf bF CTgI �_ C Oi 6w4. ~r i In O P` 5 A- EF Ct TS e k O O•T — J Ems! 1'09'Nt 3?`.c`+ • C _ Ip Nei ,'f��'�1'�@�` ' s C I z -- _ -. 1 4 , ...... mI�-J - V{'I'�I I rGO U ,; . � !CIF • Z c NI nl U Cn W _Z 25 �1 `I o O� � . d•p I Ih. C.7 �' � Ci C It v tOP 64 .l I __..._. .... ........... __. C _00 ate-• CV =K.:.c 00 N� C� r Lr) _00 > I x Q W J W / D-. �� u oo-� V) cL z N O j �j V C-4 Z `` I.,L.I C(� > W I— z CL OZI C`J _ U OO O C q ~ W j QDL ' o z�, I W \ \� W Z �p 10 �+ w U s J � N O J O L Qi O J i oIli p O Q r J _ z 1 co 11 \ O +' >- � =� \ o z Z Of \1 W _ _ 00 I w J 1 mQ <00 r- N 00z Qpw_ wg w �Z a � W z .I N O � z v \� �w �� � �II -j F- o z J �oww U cn w `�'m LioQ oho \ ZmO� Q' J \ (nQW0 i � j O < `� T , U Cl- Lj m to,2 I - / i �N a. I 4 I � \ Hd1 / i A a_ e• \\ Q` N \ \ F- DLO \I I i, W I_- W U 3: I1 �! J I / I I Co ' I 1 f 1 Q !l L� lL. l.L. L� O O 2 W WLn W O UCnN(r�0 wm Q Ctf / pcv�d-�0) II II pQ ct�0 O N r- co II Ln f (n Nn Ln- W >- (n O -i Jw w II W 0Q O U W II II II � wQiLJO 0C� w r� C.N mCID OM Q Z e JSJ lu f F < vI q Vl ~ a r IL KtZ —40__—____4a_--:=Joic__—q i+.p� W` g•{O'--^#____`_--_mil—__--7._-_�f__-.__—��F V1 x4/�Vl ,R '/ 0)Q N� }1 c10 q`� r-�W113pp V`Tf- � b1.rJ ; 4• 9� ( +' __. _. .9v{;..J JNE�3._ O J , i0a `tr _mow' } -;@I ♦'! p r I,..!•'�,i~ +--._._7 „ -. `�. - I lob ui - - cf of ausN t° P1 (er IJ `M1IC T = ..1c, CO, 7E F' LL $ It W a - ca _ — I 0o S l ^ CL Z E11 1 ]. � ' a i �N a� E v ° o x a co Ii U a ii N CL r e 1 I a _yy (� I cz v m aH o L � _ Y U a- LL _ o i I u 'o .n II I r II N i' 1 %1 0 O ON00 ,ZL-P I z V ° U 5E w.m. J , 1 .. _a 'f' ,� !4;. .> F J. i"i is .Ncp /r IM Ca} __ _ Cal ._ ' } :_ — Cal ::Bt — C&i — '; C:Bi — ._ _ ._ C,3i SW 27TH ST. --;'s) .(' _ •! -. _. i• .:...,.. �5....--`.---�. —�_oS — 85 �.e�F j•�, is :e HEET SP2 D PROJ.NO. ATf(JU NO. o.rE P.E. Slu am P.E. ST,r yo, ---41 SEE NOTE 3 r a 0 z C�. C! (Qs Bu 5.; FROM P PA Alk fr w ft T aa...aon FFER NOTE: 1. TIMBER CRIB MATS SHALL BE USED TC EQUIPMENT WHILE WORKING IN WETL0 2. REED CANARY GRASS AREAS SHALL BE SPRAYED WITH HERBICIDE. AREAS TO IN FIELD BY ENGINEER PRIOR TO CON 3. CLEAR AND GRUB ALL PLANTS UP TO 4 IN BUFFER AND RIPARIAN AREAS AND AREAS. 4. LOCATION OF SILT FENCE AND CLEAR TO BE STAKED BY ENGINEER PRIOR TO KEY 5 Aa 6 t o so foo 30% Subm i t SCALE IN FEET NOT FOR CONSTi I-405 WEST VALLEY HIGHWAY TO MAPLE VALLEY HIGHWAY MITIGATION SITE SITE PREPARATION AND TESC PLAN T,23N. Ro4E, W. 1 E RCIP IS -IS, 14 m r1cf. I. ot it _1 1.4e cp i4P P rhic. 3AS:m Es. pa % % n<; TE, ANH[:i i f t R Cqf = Cal _C91 Cal •lSC'a' C.9 L Cal—, -61 2til 31F w. > .. ...... . .... tAi Ulsf LA c9l lmdcqa SEE:_ NOTE REED CA (SEE NO SILT FEI SILT FENCE W—BUFFER 2—, FRO1.4 PARCEjL ji MATCH LINE - SEE SHEET SP4 FILE NAME PW, ps012a021z-i02.dgn TIME 6s26s4I Pm DATE F/2B/2005 Krlfwl s"T' FED.All) PROJ.NO. FJLOTTE1 BY IIIII ESIGNIED BY B. PETERSON E1.1,II, BY Joe k A. DEGUZMAN %iWlt CHECKED By R. FENTON ROJ. CONTRACT NO LOCATION 00. ENGR. K. HENRY REGIONAL ADM. 0. DYE REVISION L DATE "By a 0 r r mob 40 Im ,I O u 0 AS SI1OWN PPP—SS--TTTT cN CITY OF GRADING AND STORM DRAINAGE PLAI mFs RENTON I REVISED PER ON REVIEW JCH .3/30/00 OKB JGN PlonninmBuMing/Pubc ft rld De t. NO. REVISIONy DATE APPR GreggGreggAmerman P.E.,Ad dR RENTON, WASHINGTON % Jill Jill Jill "NN b 4 m n 9 b. Nb pie x N;1" NNI 0 lz ;s"- Z419 > Z b4 SR lg.t M A F4 m 0 <3> M. ma 21 -11.4 In, 1 H 1 *1 mw "K 1 22 @ fil mlM i �W:q� 14oh.4 01, " 41 F. 12 77.25' 03 h h h h z 0 0 1 a 0 0 0 0 7z p p at m re 00000 7'z e pp 4. M < > st 0 z 1 0 0 Tn I m 9 ^ 191.ill ;1c 1� 'g !ep V.- .GHAQ. TITLE; z 0 z 18215 72ND AVENUE SOUTH KENT, WA 98032 0 (206)251-6222 o (206)251-8782 FAX CIVIL ENGINEERING, LAND PLANNING. SURVEYING, z 'Vo EWRONMENTAL SERVICES F9, P:\WWM\$91$\ENOINEERIW\59113r�m2,DW, Nte/Ti 04, BA.;k. JUb NU. imll — OAKESDALE BUSINESS CAMPUS PHASE 3 RENTON, WASHINGTON Popi ls� CLS _cov ms) Ill BSVHJ SfldNV:) SEIRES1111 TIV U911IVO 6f8Z —017— (1211 N.W. CORNER OAKESDALE AVE. S.W. AND S.W. 43RD ST. 0 v !iL FA4 (03 00L Q ®EL PPP—SS—TTTT AS SHM """' '" """ +► CITY OF Y JGN GRADING AND STORM DRAINAGE PLAID S ,, RENTON DAO" .I-G PER CM REVI:W JGN 3/] )/GD'! p� M� REVISED DATUM OKB JGN I Plonnin /Bu•Idin9/Public Works Dept. Grn99 merman P.E., Administrator ao. REVISION By DATE APPR '•• ace RENTON, WASHINGTON RM2? 8!s �wI�ImB�g 0 Q� 9a z f� I 4QraR $gQ' fe NO2-66.41-E . ------------- In12 Ilse - y i zI f s h � I I I , M ITI) Y" I 'Tt-n G; - u r �' ? )' o', to •: n In i iI i i In _-r'3ti e ~ ti 1 a> ' �D a F a i'-. at ,11 00 J �e —r m r. 1 �I I D mx - s 3 �O sAw p -n V M c r Z �GHA(�ir 18215 72ND AVENUE SOUTH KENT WA 98032 p (206)251-6222 01 (206)251-8782 FAX (TrNC CIVIL ENGINEERING, LAND PLANNING, ENG)N¢� SURVEYING, ENVIRONMENTAL SERVICES File: f.\SD5"RW\59I I\ENGRIEERINC\39I, 3GNI DNG I U.t. JUB NU. UZIn n I VJ �i D I ; � O I I� I-, OAKESDALE BUSINESS CAMPUS N.W. CORNER OAKESDALE AVE. S.W. PHASE 3 AND S.W. 43AD ST. RENTON, WASHINGTON w o Zo aaed I1S.Ev MS) m 75VNd snd Wvo SSSNN:I70'dlllmll- 6M —0t— QF,L { i, R S f n 1. k, - 7., • - :- } -� .:. _'- .: - t� CI f1, ..{j' f9 .rj' � IB.�iii' , � .ri' ':: ..{ I r ,C)� Oa: zOp mr) -ANUl 7 bu) ColAi T :Qn i I I ul rn 020 1.0 P� wr n0"i( r�siita"i V1vCl 9Atl(1 cil{ , a R r rA -Ah , A4 OPP 1" a m np wp i r'1] . 1 1 All n' n41p �0 s 1 }J All _ too { C r I ' Gli-(. ! 4 ry4 7---Id'w�— a. ..yi• -MJ,— -- N , 1 po r? J 0 I \ 4 iwS.0 P•+ 1616 it tl�l OFF C � p h r WiAl° y�C :N,1 h c VL�/ xg ' :: ,.''� — ----- -- —��'"°° , IAA r Nto IIl u t `�,' ( V `'I is I � I a � i 3� � h� WP �I� q•NP mN� �� p I I � r ` IINNq Yl m ' '= i ------ —'-- N'---------- i� pp MA 16' r A r / I t I•{ I t. ,1"'�. ". ai!ir PPY I l+'i f 'Y.; ? .i'r I 1 b k , m'�" I r I nZ S3-JVLN0ad OVOa V S1O.1 TIV JO 2�, ,OL a31r10) ZZ50V Z 9 0 £8 ON •OJa r Q .,�, 511 ♦ 031H91*14083M0d 0Nr10S 139r1d I '! I I Ii ��°�r r�.s••dI ` 0z Ol 9 9£C09OZ0Z9'0N 03a'NOIN3LI zo R 1 d0A11001 1N31,43SV3 A11'111f1 301M,01 z m z I I ro ° e 6$� b n r k a < iul a m �EON m \ / J Erg Z ..� .,.,• �:k kq r rn to A pS v Z ��14 r R. � cw, rra -- 25,G4-6 5 2,G4G4 7" - ----- % A, r 25 1 L. Fax Post -it® Fax Note 7671 Note 76d7 1 D Date ale JF2 Q(t ot Ipaged'. TO ,x From 0 Co./Dept. D t. Co c A# Phone # Phone Q Fax Fax # d 10U."1- H,'WAI ER"QUALITY POND it f, 25A5-3 [I2CNOW ROW[ MID r1M OU 67. 20D1.12". IM llfi.n_Owy��HOWM�irAIMnIwYiYr� jpp_ '+1DD_DM N1MOAIAY..2VDNIry.A.Iq �wwwnw:lp. 9 cn Iv IN MATCH LINE STA 59+5n Cn 0 gX m I N ^ N I n J O N .R� b L ` � n x x I I I I I I ul m + I 1 0X � � I I I K m ti x I L I 2.9 x I I A f^ $ I I in m I � o�� I I -1 I I I I I I I MMIUrl UNt 51A 54+00 cn lu'35 id IcNn D Z O m N m o � � o gs m0 a 4> m 25 Q Z o r� m Nz m m N IS PROJECT NM1E STRANDER RLVD EXTFNclnry MATCH LINE STA 59+51 SEE DWG RP5 Z I O 30' h30' c . Q8 jq cl I I I �• c t I n I � I \\ I I I \ � m I I � CD I O 9 I M o> I o 'I t g �. 12� / 1 I I � i U m 1. 4 a c3 Q 30'10 30' o I I v MATCH LINE STA 64+00 SEE DWG RP7 S 4 yrr _ 4 4 ♦ At ♦ � N J. � R c c C 2 m m A gig Z z z i D ti y xxxxx�� xxxxx�$ xxxxx�$ r~ D ti A D x x x x A A A A A A A 1 A A A xxxx xxxx xxxx PPP-SS-TTl _V A 0 179154, m m N_ 0 Z N r MA X `O ®s.•o, A5,/ N-01° 07' 49' E �o o of �I 0 t4 _ N O I G■r-+ of _ W e _ w rP�SS// W ll 7 b e� �I 4 s�F•/P S.O.. 1 _ � � \\ i� � � ,t� Pvt. F•i�'o�l ... . .. E/. /T. �7 r+ • Match Line ,eta. '14+00 See Sheet 37 � I• ! i i I '. ! ! l,:.:.. �.�.� _. .. r N r N r .. r N 70 x r N r cn ... .. .. a - m `'. d T 1 - d � ...... : I : . I ; ... . ! .. .. t .. ... I w (O � N �' � Ox O � 10 -� O S � 01 NJ � y TT♦ D :I:. :� I ... :� �+�0 �O wa i T �v i 1 T1 fpyr`� m .. i ... .. . I ..... .. ..... 3 N O N O .< 7; O r 10 . ' O. t I ::.:�:: ::::::: N x 3 u m c N rn n i I O O • r ::::::::: a y of m .� :::� ° 0. Itt mO o� D ■.� :.. .. i..........—...-. --•.' :•-::::::: `N m m m m —. .(t -� C- t'�t ■ m : 1: :.i : W c. Y. o p E r J si2 I. .. ...:I x ;E -8Q. V::::. m _ ,_ __. ............ . d; ......... ' .. m .. :.: ... , ..... f IN v 'e •c W �M m y -� 1 .. t` �1 w o �,,.. _ .._..._...._._..____..______...._.__.._.:...:.._.__ ._ __._�__:. � CA Pr X , x L-4 A VW �� ■ae�s0)■■■■�00�0 �K)co■.aaaa�.��r�ti�t�ellOAl��u®�so®et• WTR -27- 2757 OAKESDALL AVE SW E%TEN ION PHASE IL & It Pug. 01 of 10 0 C 0 r W V�v 91. REVISION "`" 111_p. �w &M CITY OF +. MA - RENTON (! YW YOO B DATUM Planning/Building/Public Works Dept. Gregg mmermdn P.E., Administrator F _ — %7AN STSVS S ss%wit'aru spOCe 1r �a OAKESDALE AVENUE S.W. EXTENSION PHASE 1 B & 2 — SW 31 ST ST, TO SW 19TH ST. . �DE< UTILITY PLAN U1 STA, 0+50 TO STA. 5+20 u MATCH LINE STA. 5+20 i 1 P r r k r r F k r F rr k i r r c� k�� E k 0 0 0 0 0 0 E GD0np v-Nis 3 rmmm `tOm f2zxm rn�rnm�i 0 mT r �—rnv)fO > AmOA2ZC rm3rn2 opDOOO mm m,! O0zm vo �ooi ctorn�rnirFS2 z �xo- �' 'r moxx 1 z n nZ �� rO�z FW a)? O� O b m O M my Tx <~ zmpn_.. �c.CoAm �A v � m A Ay M;U -< Z ON z A r C n In fr, O� -�O-C 1mor yOZ n m m- ai F�zfn �zD z o = o DO�m v z m` ocsirn -ate m m A m w 2 • ti v E � . .nr. nm — nm — w 1 se c,:: su - w. 1'-40' " '` », DATUM &M CITY OF .0 RENTON 99 Gm99Plonn1 Z-morman P.E., Adm ni for GRADING AND STORM DRAINAGE PLAN FOp Nn OAKESDALE COMMERCE CENTER -- -�- 4 REVISED PER aTr RenEw coMMENTs REVISED PER CITY RT: COMMENTS — ...-- mn mW 7 „ 7/„� oNe Dlm „a,,,, AS ---- 7 2 REvlsm PER aT'r REVIEW COMMENTS —.___._... n esr 1ZIN olm BD 1 REVSED PER PEDESTRMN PADWY MWFnTam EISW 12/10 07 DI® m — AS NO. REVISION 9Y APPR - — cf Iw1A 55y�N sP• . _(DACE � G � t '.':! I oim s • SW 3 fH STREET g ° 1 Y u. fifiA � i14m!m!!4 N nn `I tg e M oi° m� qm$ Nlo nla I "TT". nmBig m o�m �• ±� F N�� I x O i 1�f Po g &� v �? � AN Y R` ��• 5'C o4 o I*� f7 o �y m w o -14 —[1— — o-, 1 - 4 TTi"`Ti 5Iss u `S f `"fFa y' iN 4, B B 8 o4 v ----- -- - - -- ----- — — — — — — — — - • J'n 1 P i m I� ° t, 3 Jill Q0 E M cz 0 Z PQ,%HAvs� 18215 72ND AVENUE SOUTH KENT, INA 98032 FOR I 7 6� (425)251-62a2 x o (425)251-8782 FAX < ENGINEERING, LAND PUNHWG, CIVIIN r Apo SURVEYING, SURVEYING. ENVIRONMENTAL SEI7JICE5 UE •YC ENG,N� g I I I I II I I I I I� e� er•, o' -- - —06 , a• s � o m H$ m 3:1 v .�.. Mr. M. FIR I k r sd, G+rig � Ell ry 38° � gg IR e z �} CAPSTONE PARTNERS, LLC 1001 FOURTH AVENUE, 44TH FLOOR SEATTLE, WA, 98154 (206) 389-1527 B.G.E. JOB NO. 11010Fn. .II k1s\I pllU\, k.vnw d,Wme 6m, ...ryr,nologml awq OaL. /Tinre 04f07/2001 04:,8 'k ulrc 1=40 hw11111t11 xrels: :nulal,:I:o 10-b,tI IU IJs,•nn-b. O m s D D I mI y/ D ' D m z I Z cf) co ..�� �•'fU TO I r I �dey f JTy I Z - �' 9,1 " ,, 11 I y If $. „ TITLE GRADING AND STORM DRAINAGE PLAN FOR OAKESDALE COMMERCE CENTER WEST PHASE V T e REVISED PER CITY REVIEW COMMENTS — mv, 3 17/04 DX e a ,ae — z "°" g® CITY OF GRADING AND — 3 REVISED PER CITY REVIEIN COMMENTS BIN 3/Iva DKB _—_.. _ — M RENTON STORM DRAINAGE PLAN I.:- 2 _ REVISED PER Cftt RENEW COMMENTS —. _--...._ BSW I a DKti Bpf =E w.. 1 REVISED PER PEDESTRIAN PATHWAY MODIRCATIONS BSW 2/10/03 DKB o.�.w. -- I DATUM --- --- -- 1 �� Planning/Butldtng/PuWio Works Dept. FOR NO. REVISION BY DATE APPR ^'^�•��. -- `�' OnF°"a GR99 mmarman P.E.• Adminlstrator OAKESDALE COMMERCE CENTER > Till T ll TrIf a u _ N�y K Am SW 34TH STREET �e i it I I I�- _ -, - so m ;99'99ZL .�rO.ILL9N� • -- _ _ - _ - _ � •� -� ,o � � - _ � _ _ 6 ro mm — 1I i - - _-- ----- R =8 R`iS � m N N N I N A t ���� I ::I I CI 1 _ f, i• . f u V ' •; ? -T- sor � �„ l l NNN I �o ua i1r>r— r z9 $ RRR111NII °�L^ �8 ° os- 8g 15 _ n 0�yS 8 N R eN aA;71 Cc+ $yYL,"x-._ -O 3S s� „^t e a s� A 1 ilp iit I _ I iEii ii .J if i• i -. v O+ y P— N _� � •OpY I I J• -6S �' F g{ .4 � F--'� '' v 3 I +T E - OI `• 9L 1- v •7s 0 i �ycx I 6 � II f sr AEr T �t� i�t ���� i�T I ie xy_ ^fig 4E „ IRP4 �8� �a� �a� in �(Aipi�AE oqY N H br NrV 11 A — VJ G G a " J z I„ I'I b .. Im i „ s S� aL Eil 1I 4• I ' _ o n _. I ' Il8 qi¢+E+ '` N ♦9, db d ;I x . 1 ��r ��� ii�� A�� $ q' e � � 'I � �� ❑ I "G�r 33'` '� I s b -� �./ l m5 s ta. E�yS+ s T rogT�„� NQ°i$� YY 9m • YmT ,�.. u Q o 1\ b p- I m� — — — - m H m r T ti Nr 11i �m £O I A m g 'ti a ra d1-�u •Yef 1 X E £ t1 s 1 11 r� do �i u _ + '� I NM, I"r I E a.-� C •\5 ' '4 -'� # 1 :� +rf �xY-, _O _ ' _❑ u y' ,n P " �e I °d II ° <? �I � s w III .-i � • = z ,I 1 z oyi o FFa \ S r I I �^ 4 e` • e rn C w s2 E 8 (Nl1 f- 9'. ''..I �z] r y > I •I I }[2:: 11 {� i I I „$ A (ll Z C7 e yy yy to -I n ,a. o `d `d z \ f N �I'� t •x �a µ 9� I � .—_�� _ __._ -_ _ _ s SS 9_ �� _- _�4i � I - - - --- --- -- - �A �' � � i€ � I I I I u �� G ;k ' , � N i•';t, ��. �~� • . i>,M � +R� ,� i _ ° t, ��^_C I � 1;'� � g ,;:. �� `i� t I 0 " D I TreYC 'i� q —4 e N fi Ej m ab oYi E„ ` _ S' 0 o I �° ExisnnG wFrLAn� —oRp 1 -VM U c FCR TITLE 0 C ��1�.4�5 18215 72ND AVENUE SOUTH y g ° z P F KENT WA 98032 CAPSTONE PARTNERS, LLC GRADING AND STORM DRAINAGE PLAN Q 0 e (425)251-6222 1001 FOURTH AVENUE, 44TH FLOOR � _ E (425)251-8782 FAX SEATILE WA J8154 FOR m _ C �7 OAKESDALE COMMERCE CENTER CIVIL ENGINEERING, LAND PUNNING, (206) M-152/ th r'YGENGINt`P SURVEYING, EM/IRONMENTAL SERVICES WEST PHASE y= me FM: PA IwOs\IIOID\engineer nq\Engineerina-w^sl\I IOIOgm2d,q NJ,/Ti. 04/07/2004 09'. DO Scnle: I=40 [wollastoe xrels: :i 1010t•: - 11010-b.rI l010'.0 b B.C.E. JOB NO. 11V IV G2 - 24 T23N R4E W 1/2 y **' WATER VALVES PB/PW TECIMCAL SERVICES 09/27/05 ill 7 t { Y } 3925 \�� 12 it PRV #23 1 0„ 3935 3934 393 N V 3937 QAZB 12 - 36 T23N R4E W 1/2 x N N z 1� N 3916 I ' 3915 N 3918 8 3924 392 3920 5045 6061 5O4 4494 • Q 200 4Q0 H 2 1:4800 25 T23N ME W 1/2 4325 G2 - 24 T23N R4E E 1/2 i DET.#1----� 1 12" 4747 4748 / PRV #24`�4744 471 305 / 474 \ 4749 10" �M 3852 10" • 54 51 3 51 3 475 85 --- 4f6 lb 3 475 12 U = 395 IL O • 3837 • 38 CD38 • N8 41 1 4756 t 3840 3844 $330 W 2 1 St • 5331 3846 475 13i8393858 D96M ..w ___._.�. 38 •. 3855 3857 �. 2 384 4 54 _. 532 � � O O 9 196 31 2"922 5045 12' I 5� N 53 i SW 30 5�23 5677 5674 12" 5678 5679 567 5675 1296 10 12 567 56 0 =d5 38 3867 ` M82 6083 10" 5681 5683 loll � 5 a • ' 56 3868 5671 56 0 5 35 • 1' N • 608 6085 608 �38 • 68 5670 10; 568610" O • 5669 56 5688 34t S6 • O , S T� v 1 387 ` _ _ _ 1 566 56 36� _.. • 125 5 l� ;387 • 3871 4771 15 00 00 > 12n 1 476J2�j7 q 21 24 2 36 391 n l O Q z N CD 38 4 3; 3882 2�' 391 V 1 � + 3915 12" 0 4769 10" 4770 4t77 4774 47 10" �d Q ✓ f 4 3885 � 3 N 3918 `�V' 8 2 �. 3888 38 3894 4070 CN 38 38 3896 3924 r 3 8 3890 " 64 4 00 47 S W 3 9 3899 4066 392 3920 391 -39 4 ii 12 4 \O » 38 3903 LL 6061 6 ' 3 1 /,0 �777 477 0 121 4481 5 • 3901 3909 3908q " 39 ^» 36 044 4494 4482 • \O 39 tJ 44 8 ' 423 • O R 425 12 - 36 T23N ME E 1/2 1`ty O WATER VALVES + + PB/PW TECHNICAL SERVICES 09/27/05 Q 200 400 H2 1:4800 25 T23N ME E 1/2 4325 G3 - 19 T23N R5E W 1/2 47 _ 00 3305 12" SW 3308; 47 328912„ . SW 23rd St \.., 327 3277 • - • 3276 3 ?�81� - - I L"• --- _ 3307 8" 3943 - • 3 39990 -3989 4760 4761 • 3988 d3945 » N 12 47 10" a0 • rf 3852 10 • 54 'Q 1� 3987 385 I �' 47 3949 � 3947 395 f�-4 N 3946 �— O 16" 394 0 04763 >3985 . — • 38 10 w 39 79 a 3983 j 1» 4756 i ' +65 CN - j (y t N 4764 p 8 /ql Lh955 \t. 3957 rr St. 12" 2270 3855 3857 596 (r�12 •3}�1.2. 3959 3943_. gs7th .3947._ 3970 e4912 10- O O 39 3 _ 370 „ 39 3975 - . 3972 Nt 336 369 O 3974 1 9 O 977 " 3973 .N- 4012 �p � 1�99 N 1 3998 SW 2 h- N _ 1040 " •..._ 4007 .. _ 4 5 • . 4004 — , a01% 12" 399 3993 400 » 40 400�0 4001- 3997 rr •3995 W �12 0 �. g w %96 W • 8» 401 SW 30th St. 4013 047 4049 4010 N ¢ 1 2 rr 93 w 12ff M 5678 5679 • • 0 �... • 8" N 56 5 • rr 4041 10" 145 r6082 6081 N $ 37 y: 6083 404 • 1 0" 4 • N 5681 5683 10'f i 51 • 6080 • 4893 " 5504 M 56 56 ¢ 3589 4050 1 0 3 4053 N • 6085 608 40* • 10" 608 51 5505 N • Q rr 83 5506 i�) 6 8 U • [j " 568610,E S4� • • 3 • • 56 7 5688 56 4055 O N ? i 94t I S 40 4 6�th 34 134 St. 4035 56 56 �t 44037 a I} . 16 1 444 20 Z3. 4771 25 t. 4028 403 _ ... » _.. 1 2' 4038 ?. 2 4 i f2 2 3615 4025 " 4030 f 12 40 48 12 4036 4039 N O — O f O � Q e O ►� 4769 4770 47 - CEO 4895 4896 10" 4774 - 407 N (� r� • .— 4 r 4056 8" �/ 1 y'' ✓ r .. • 8ff � 4077 ' P / • ( 4058 12 46 4073 • • ! l'/ t, 4 5 4080 rr 4 44 5232 • 8 �� O 52 5449 40X i 3 93 4 r—� 3888 38 3894 4070 40 43 t�� 5448 8" � j N ✓ 4081 � l ,rs �Q 38 3896 • 4059 4061 4082 E" 4086 i( rr 48 • 40854 8 10 0 • 4083 „ o0 3890 Q 3899 4066 064 4067 ~ 523 \ SW 3 V 406 r� "47 4 84 • -.:_-_. 40624 4063 12 8" 38 39 » 120 • U 47 121 1 2 . _ 1 20 .9 , L • 1 2 1 3903 152 1 • 3901 1272 0" 228 " 3908 39 1)36 4091 8 39t{�SJ 47 2 • 4080 4090 CU9 40 • � CLJ 475 4786 1014254 N �q�1 u 41 ►7t 4St. 4255 10' 426 427SW 41 st S4 478a 430 a 28 _ • • 1 N 4299 ..,. ! 2 4267 1 13 - 31 T23N ME W 1/2 ��Y o Q . 2Q0 4Q0 WATER VALVES 1:4800 I--I3 �.Ls'N � P/B/Pw KCAL SERVICES N T2 ME W 1/2 0 09/27/05 30 3 5330 H2 - 25 T23N R4E W 1/2 I = N pi� • • r • 9 9 39(3940 12@}8 1 I cu 4208 355 10, 4210 4209 N12 � 1 I 4219 1 4213 1 10 r 4220 S 188 t*Y-ca)WATER VALVES PB/PW TECHNICAL SERVICES 09/27/05 3937 5045 12' 6 5044 • 423 504 • 50� 422 512� 0 5048 50 48 44 ClJ • • % 60 ro a I 505 cu 181 6005 ~ 1 96 5000 00 4215 6007 6008 1 41W ._ _. 12� 6009 6010... .012 6013 4 3 . 1• P` 1 81 st St. 1 R9.nA 8t. N H N W z N S 186th� Q 200 400 12 1:4800 36 T23N R4E W 1/2 6 ws��s � 12 - 36 T23N R4E W 1/2 SANITARY SEWERS + PB/PW TECBMCAL SERVICES 03/08/05 Q 2QO 4Q0 H 2 1:4000 25 T23N ME W 1/2 4325 to to to to CO 00 to to to Q e e e e e e e e e e e e e e e 4 4 4 i 1 1 1 1 1 1 G3 - 19 T23N R5E W 1/2 �a 47 SW 23rd St U 00 0 2 7 V a0 vio c SW 27th St ..a 3 6 5 4 12. 12• 8: SW 27th St 1 9 60 10 SW 29th St a 14 8' 8' 13 41 U ao cu CD 1s 45 co 17 a 00 .,219 zo TALB �� � LIFT L9 54 1 ao �� zo 22 23 ao 24 b 0 EAST VALLEY 27 i LIFT STATION SW. 34th St 40 L-19 S' 31 W 4th St 29 3r 8' 30 81 28 41 N 42 33 Cu OD. a3 A.' ,5175 � 43 35 3 34 78 807 38 0 sc w cs �u SR18-1 SR18- . .. w 806 36 39 / - '` 37 805 a 1 44 ISR18-15 55 ti. 49 1 CU B. N. I a 04 i r J 41st St SW 41st St J SW 41st St x 13 - 31 T23N R5E W 1/2 e*.! SANITARY SEWERS It P/B/PW TECHIJICAL BERVICBB 03/08/05 W O N w z vo vt t=i N Q 2Q0 400 1:4800 H3 30 T23N ME W 1/2 5330 4 IN i ------------ ------- H2 - 25 T23N RU W 1/2 w I -y cl C, S 180th St 30 19 i � `,�40 31 �6 _7 _8 9 .6 to 3.2 11 10, 1 10, 10, 41 10' co 33 43 CD' 4 ��4 3 —2 181st St S 182nd St Li fn 190th St y SANITARY SEWERS R+ P/B/PW TECHNICAL SERVICES 10 �� 03/08/05 S 186th Si I 188th Sl PRO z pu I Q 2Q0 4Q0 12 1:4800 36 T23N RO W 1/2 43: Hydrology at Springbrook Creek Bank: Existing and Proposed Conditions Units A and B Existing: Springbrook Creek flows within a straight, bermed corridor between Units A and B. Precipitation and stormwater inputs from adjacent roads and development are the primary sources of existing hydrology in Units A and B, with minimal hydrologic interaction with Springbrook Creek due to existing berms. Springbrook Creek currently overtops the berms at elevation 14 or 15 feet, which corresponds to between the 2-year (13.1 feet) and 10-year (15.3 feet) storm event. Proposed: Seven 20-foot wide hydrologic connections (3 in Unit A, 4 in Unit B) will increase hydrologic function and floodplain interaction when stream stage rises above elevations of 12 feet. This will occur roughly 5 days (114 hrs) annually and 1 day (23 hrs) during the growing season (based on modeling of future conditions). The breaches will allow for flow to enter the sites more frequently and at lower flows than the 2-year storm event. Floodwaters from Springbrook Creek will disperse across Units A and B, which are relatively flat, and extend inundation and/or saturation during the growing season. Unit C Existing: Existing hydrology in Unit C is provided by a combination of stormwater inputs from a conveyance ditch entering the site from the Burlington Northern Santa Fe (BNSF) property to the south, precipitation, and seasonal groundwater. Wetlands occur at an elevation range between approximately 19 and 24. A relic segment of the historic Springbrook Creek appears to be present on the Unit C and occurs at an elevation of approximately 15 to 16 feet. Proposed: The existing conveyance ditch will be plugged near its entrance to the site and flows will be diverted to the 10.24-acre wetland re-establishment area with a bottom elevation of approximately 16 feet. Hydrology will be available for wetlands to establish between elevation 16 and 17 feet. An adjustable -height weir will be installed at the outflow point from the wetland re-establishment area to ensure up to 2 inches of seasonal inundation at elevation 16.2. Water from the 180th Street grade separation pump will supply additional hydrology (45,000 cubic feet per month on average) to the site via Unit D and the existing conveyance ditch. (This water is currently routed directly to Springbrook Creek.) Pumping will extend the hydrology available for wetland re-establishment up to 5 weeks in the late spring and 3 weeks in the late summer. To extend the available hydrology, the bottom of the wetland establishment area will also be modified to achieve a uniformly low infiltration rate. Unit D Existing: A shallow ponded area occurs on the northern part of Unit D. The ponded area and the forested wetland appear to be supported by seasonally high groundwater and surface water connections from other wetland areas west of the BNSF mainline. A culvert connects the wetland area west of the track to the ponded area, and the entire site discharges to the north, via a culvert under an existing BNSF rail spur and an existing conveyance ditch to Unit C. springbrook hydro summaries 9-19-05.doc Proposed: Hydrology in the northern portion of the site will be supplemented with approximately 45,000 cubic feet per month on average of water from the 180th Street grade separation project to be provided via a pipe from the treatment/detention pond that collects discharge from the pump station to the northern end of the unit. This will provide additional water to the Unit C wetland re-establishment area and may extend the hydroperiod in the northern portion of Unit D. Unit E Existing: No wetland hydrology currently exists at Unit E. Proposed: Fill materials will be removed over approximately 8 acres with the lowest elevations being at elevation 8 feet (base flow of the creek). Elevations below 11.5 feet will be saturated at least 5% and inundated at least 1% of the growing season (March 1— October 31). Wetlands are not expected to re-establish at elevations above 11.5 feet. Low flow channels designed to divert flows from the unit back into Springbrook Creek as the creek recedes, precluding the presence any isolated standing water not directly connected to Springbrook Creek and preventing fish stranding. springbrook hydro summaries 9-19-05.doc Congestion Relief S Bus Rapid Transit Projects August 29, 2005 Subject: DRAFT Springbrook Wetland and Habitat Mitigation Bank: Unit C Water Balance Memorandum This memorandum describes water balance calculations for the proposed wetlands to be created at Unit C as part of the Springbrook Wetland and Habitat Mitigation Bank. The purpose of water balance calculations is to identify whether sufficient water is available to establish wetlands. The findings from this analysis are: • Water pumped from the 180th Street grade separation site will extend the period of adequate wetland hydrology within Unit C. • Preliminary results of the geotechnical investigation at Unit C indicate that infiltration rates could range from 0.0012 to 0.06 inches per day. • If the infiltration rate is 0.06 inches per day, water pumped from the 180th Street grade separation pump station could extend the period of adequate wetland hydrology by approximately 1 week at each end of the growing season. • If the infiltration rate is 0.0012 inches per day, water pumped from the 180th Street grade separation pump station could extend the period of adequate wetland hydrology by approximately 1 month at each end of the growing season. • The bottom of the wetland should be designed so that infiltration is 0.0012 inches per day or less. Methodology Water balance calculations are performed by estimating all inflows to the wetland and all outflows from the wetland. The total inflows are compared to the total outflows. When the inflows exceed the outflows, there is sufficient water for establishing wetlands. When the outflows exceed the inflows, there is a deficiency of water in the wetlands. The calculations were conducted based on monthly averages. Components of the inflows and outflows and data sources used in the analysis are presented below. Inflows The Unit C inflow components considered in this analysis consist of: (a) pumped flow from the 180th Street grade separation pump station, (b) direct precipitation falling on the wetland, (c) stormwater runon from areas upstream of Unit C, and (d) soil moisture uptake when the groundwater is relatively high. Congestion Relief & Bus Rapid Transit Projects • Pumped Flow — The 180th Street grade separation pump station began operating during the summer of 2003. Hours of operation for each pump are recorded monthly by Tukwila operations staff. Pump hour data were obtained from June 2003 through May 2005. However, data were not collected each month. For months in which no data were obtained, the values were interpolated using a straight-line graph. Figure 1 shows a graph of calculated pump flows based on the pump hours. Tukwila Pump Station Data 80000 70000 w 60000 50000 = 40000 6 > 30000 20000 10000 [7 co M co co v 't It NT � � LO LO 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 N N N N N N N N N N N N Co co O Co co CD N N Dates with Data Figure 1 — Tukwila Pump Station Data Pump 1 Pump 2 Volume of water pumped was computed by multiplying the recorded pump hours by the design flow rate of the pumps. Through October 2003, the flow from each pump was approximately 10,000 cubic feet per month. ° Throughout 2004, the flow from each pump increased to between 40,000 and 50,000 cubic feet per month. ° In 2005, the pumped flows were almost 80,000 cubic feet per month in February, but dropped to around 50,000 cubic feet per month in April. In May, the flows increased to over 60,000 cubic feet per month. E Congestion Relief & Bus Rapid Transit Projects For the water balance analysis, pumped flow was assumed to be the same as for 2004 because the 2003 data appear to be low and not enough data were collected in 2005 to justify using the slightly higher values from 2005. The calculated pumped flow from each pump was added together, and the total was converted to a depth of water over the proposed Unit C wetland creation area (13.8 acres). • Precipitation -The precipitation used in the analysis is average monthly Pow was I r(A 1, *FF precipitation for a 53-year period recorded at Sea-Tac International Airport. c,o-lc��a% ? • Runon - Approximately 80 acres of land directly south of Unit C drain to Unit C. wh"} I', 4C 6. S'.s ur- Two-thirds of the area is undeveloped and one-third is developed and impermeable. �r u4,,� Evapotranspiration and infiltration in the upstream area is ex tee The -higher during the summer months; therefore, it was assumed that 0 erqhe nt of the... F,� 'r't �^^� us; precipitation would flow to Unit C from October through April and percent of the ''Jkl �n-Ate^ moo' precipitation would flow to the unit from May through September. precipitation - WA5 V a,..,.d. J used is the average monthly precipitation from the 53-year period described above., -j 4 (L bf 4-01 wu-0 ail+s S� a ,ta • Soil Moisture Uptake - Soil moisture uptake is groundwater that is available to the yb'o'k a"k wetland. The City of Renton has three piezometers installed in Unit C. Data from the two piezometers nearest the wetland creation area were evaluated. Data were collected by the City between June 30, 1997 and May 11, 2001. Data were collected on 20 dates. Ten data points occurred in 1997, five in 1998, one in 2000, and 4 in 2001. Most of the recorded points (12)''occurred between November and February, outside the typical growing season. Water levels recorded at the two piezometers were averaged monthly. The soil moisture uptake in inches was calculated to be the 'Z monthly average water level in inches above Elevation 15. Elevation 15 was selected for comparison because it is 1 foot lower than the proposed wetland bottom. For monthly average water levels below Elevation 15, no inflow contribution was vj calculated from soil moisture uptake. k -hol-6.-, uF Px(F"atr- ? IS �i5 i ee r,, sr Of Outflows Q0o�5 Fn-,- 5<lu gro,,l? Outflow components considered in the analysis consist of evapotranspiration and infiltration. Surface water discharges were not evaluated. The basis of each component is discussed below. • Evapotranspiration - Wetland evapotranspiration is well represented by approximately 0.70 to 0.80 percent of the Class A Pan Evaporation from a nearby open site. Monthly Class A Pan Evaporation values from the Seattle Maple Leaf Reservoir were obtained from the U.S. Department of Agriculture (USDA) Natural Resources Conservation Service. The monthly pan evaporation values were converted to evapotranspiration by multiplying by 0.80. • Infiltration - A Geotechnical Investigation of Unit C is being conducted by Hart Crowser. Preliminary results of the investigation indicate that infiltration rates at the site could range from 0.0012 to 0.06 inches per day. Monthly infiltration rates were (i,i, `IA' Ga /cdla%r -1 V 4'Y- o f ljr ✓�v � h/s %c � / t o � r yv f �Ar � � LCJ' S i��IQ.• A � 3 goes 1-lk' titir� L ? Congestion Relief & Bus Rapid Transit Projects calculated by multiplying the days per month by the infiltration rates, using both the low and high estimated rates. Results Results of the inflow/outflow calculations are presented in Table 1 and are shown graphically in Figures 2 and 3. Figure 2 depicts outflow conditions at the higher infiltration rate (0.06 inches per day) and Figure 3 depicts outflow conditions at the lower infiltration rate (0.0012 inches per day). Total inflow with and without pump contribution is plotted on both figures to assess whether the pump contribution is significant. Table 1 - Estimated Monthly Inflows and Outflows of Unit C (in inches) Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Inflnw Pump 1.80 1.65 1.75 1.86 1.97 2.07 1.95 1.83 1.71 1.89 1.86 2.10 Precipitation 5.62 4.16 3.73 2.52 1.64 1.46 0.76 1.09 1.71 3.46 5.98 5.83 Runon 6.52 4.82 4.32 2.92 0.95 0.85 0.44 0.63 0.99 4.01 6.93 6.76 Soil Moisture 1 21 6 5 1 0 0 0 0 0 0 8 Total Inflow 14.93 31.64 15.80 12.30 5.56 4.37 3.15 3.56 4.41 9.36 14.77 22.69 Infl. w/out pump 13.14 29.98 14.05 10.44 3.59 2.31 1.20 1.72 2.70 7.47 12.91 20.59 f1I itflnw Evapotranspiration 0.46 0.70 1.39 2.51 3.71 4.04 5.34 4.22 2.78 1.32 0.56 0.42 Infiltration 6.2 5.8 6.2 6 12.4 12 12.4 12.4 12 6.2 6 6 4 Congestion Relief & Bus Rapid Transit Projects 35.00 30.00 25.00 rn 20.00 tv t = 15.00 �— Inflow with pump f Outflow (high ;__-- infiltration rate) A— Inflow without pump nately 1 pp 1 tension in extension week extension in hydrology wetland hydrology Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Month Figure 2 — Comparison of Inflows and Outflows (high infiltration rate = 0.06 in/day) M Congestion Relief & Bus Rapid Transit Projects 35.00 30.00 - - - —Inflow with pump ------ Outflow (low infiltration rate) Inflow without pump 25.00 - - ----------- ---- --- --- fn 20.00 -----------i ----- - - Approximately 5 Approximately 3 V j j week extension of week extension of — 15.00 wetland hydrology, ------- ----------- r--- - ------------------- -- wetland hydrqlogy -I ---- ---.- 5.00/------- MW Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Month Figure 3 — Comparison of Inflows and Outflows (low infiltration rate = 0.0012 in/day) L Congestion Relief & Bus Rapid Transit Projects Conclusions and Recommendations S ft) When inflow exceeds-.ou fiow-there is,nn-sidered to be sufficient water -to-support. wetland hydro[ gy _When outflow exceeds inflow, wetland hydrol� may be impaired to some degree. �W analysis indicates that outflow generally exceeds infl6W-�fr`om ay tfrrough-S-eptember without pumped water from the 180th Street grade separation pump station. The addition of water to Unit C from the pump is sufficient to support wetland hydrology at the site. Figure 2 shows that at the higher estimate of site infiltration (0.06 inches per day), the inflow almost matches the outflow during May and September when the pumped flow is added. At this higher infiltration rate, the period of adequate wetland hydrology is extended by approximately a week in both May and September. Figure 3 shows that at the lower infiltration rate estimate (0.0012 inches per day), outflow exceeds inflow only during July and August. At this lower infiltration rate, the pumped flow extends the period of adequate wetland hydrology by about 5 weeks in the early summer and 3 weeks in late summer. The following actions are recommended to further confirm the results of this analysis: • Identify engineering measures required to limit infiltration at Unit C to approximately 0.0012 inches per day. • Continue to obtain pump hour measurements from the 180th Street grade separation pump station. New data may confirm that more water is available from the pump station than is included in the analysis. • Existing onsite piezometers should be regularly monitored to better define groundwater levels. IAsL lx s�i HSPF' cr+iJ �t cg1 iy A)HL fp 4;n� 4,11e +r��o�► PfP�,P (r���FF IF Prospectus for North Fork Newaukum Mitigation Bank Lewis County, Washington September 2002 Prepared By: Heather Roughgarden and Noah Herlocker Environmental Affairs Office 310 Maple Park Avenue SE P.O. Box 47331 Olympia, WA 98504-7331 (360) 705-7491 lti #gton State Dapwtment of TrIusportat m Table of Contents INTRODUCTIONAND PURPOSE..................................................................... I 1. ECOLOGICAL GOALS AND OBJECTIVES...................................................... I 2. SITE LOCATION.....................................................................................................1 3. RATIONALE FOR SITE SELECTION................................................................ 2 4. EXISTING CONDITIONS...................................................................................... 2 ) 5. SERVICE AREA...................................................................................................... 3 6. PROTECTIVE COVENANT AND PARTNERSHIPS ......................................... 3 7. CONCEPTUAL SITE DESIGN.............................................................................. 4 A. WETLAND RESTORATION (0.53 ACRES)................................................................... 4 B. WETLAND ENHANCEMENT AREAS (91 ACRES)........................................................ 5 C. RIPARIAN AND SHORELINE ENHANCEMENT AREAS (38.57 ACRES) .......................... 5 D. UPLAND BUFFER ENHANCEMENT AREAS (42.15 ACRES) ......................................... 6 E. SUMMARY OF BASIC PROJECT CONSTRUCTION ELEMENTS (FIGURES 3-7)............... 6 8. POTENTIAL ADVERSE IMPACTS TO AQUATIC RESOURCES OR OTHER HABITATS FROM BANK CONSTRUCTION .................................... 7 9. DEMONSTRATION OF FINANCIAL ASSURANCE ......................................... 7 10. MONITORING, LONG-TERM MANAGEMENT, AND REPORTING ........... 7 11. ANTICIPATED CREDIT RELEASE SCHEDULE ............................................. 8 Tables TABLE 1: MITIGATION ACTIVITY AND ASSOCIATED ACREAGE .................................... 6 Figures FIGURE 1: VICINITY MAP.................................................................... 9 FIGURE 2: SERVICE AREA................................................................... 10 FIGURE 3: MITIGATION DESIGN PLAN 1................................................... I 1 FIGURE 4: MITIGATION DESIGN PLAN 2................................................... 12 FIGURE 5: MITIGATION DESIGN PLAN 3................................................... 13 FIGURE 6: MITIGATION DESIGN PLAN 4................................................... 14 Afti► V6m'hkW*" State rrtt at `fry Ap sportatro North Fork Newaukum Mitigation Bank Prospectus September, 2002 Introduction and Purpose The Washington State Department of Transportation (WSDOT) proposes to develop and operate a mitigation bank. The North Fork Newaukum (NFN) bank will provide compensatory wetland mitigation for unavoidable impacts caused, primarily, by the expansion of Interstate 5 (I-5). WSDOT has purchased a 230-acre site located southeast of Chehalis, Washington (Figure 1). WSDOT and the Natural Resource Conservation Service (NRCS) have partnered to permanently protect the ecological functions and values found at the site. Once the site has met the performance standards outlined in the Mitigation Bank Instrument (MBI), it will generate about 78 credits that will be available to mitigate for impacts to category II wetlands at a ratio of 1 credit per acre impacted. Impacts to category I, III, and IV wetlands will use an adjusted ratio. Credits will be used within the NFN's service area, Water Resource Inventory Area (WRIA) 23, the Upper Chehalis Watershed (Figure 2). The following agencies comprise the Bank Oversight Committee (BOC) which coordinates with WSDOT in the development and approval of the MBI: • U.S. Army Corps of Engineers, Seattle District (Corps) • U.S. Fish and Wildlife Service (USFWS) • WA Dept. of Fish and Wildlife • Lewis County 1. Ecological Goals and Objectives Washington Department of Ecology (Ecology) Environmental Protection Agency (EPA) Natural Resource Conservation Service (NRCS) The goal of the project is to improve the ecological functions and values provided at the 230-acre former agricultural site. WSDOT will restore 0.53 acres of wetland, enhance 91.0 acres of wetland, enhance 32.37 acres of riparian area, enhance 6.2 acres of riverbank, and enhance 42.15 acres of upland buffer (Table 1). These restoration and enhancement activities will result in significant improvements for fish and wildlife habitat, water quality, and other stream and wetland functions in the Upper Chehalis River watershed. 2. Site Location The NFN is located adjacent to the North and Middle Forks of the Newaukum River, approximately 12 miles upstream from the confluence with the Chehalis River (Figure 1). River valley properties in the vicinity of the site consist of agricultural land that is slowly being converted to rural residential home sites. The forested foothills above the Newaukum River valley primarily consist of privately owned commercial timberlands. North Fork Newaukum Mitigation Bank Prospectus September, 2002 3. Rationale for Site Selection The 230-acre site provides an excellent opportunity to improve ecological functions in the Upper Chehalis Watershed. Historic and recent farming practices have resulted in alterations to wetland hydrology, and have removed a majority of the native vegetation from the site. While ecological functions have been severely impaired, opportunities for successful restoration at the site are high given 1) the North and Middle Forks of the Newaukum River provide excellent "corridors" for re -colonization by wildlife, 2) relatively minor fragmentation has occurred in the adjacent landscape and upper watershed, 3) the proposed ecological restoration strategy is likely to succeed in providing increased water quality and habitat functions, and 4) native chinook salmon stocks spawn on site. The restoration and enhancement activities planned for the NFN will specifically address limiting factors that have been identified in the USFWS' 1999 Chehalis Fisheries Restoration Program: Guidance for Project Proposals. These limiting factors include degradation of streambed quality, riparian vegetation loss, bank erosion, elevated water temperature and summer flows that are unnaturally low due to human disturbance. The following site conditions represent some of the ways in which the NFN meets the key factors of mitigation bank site selection rationale: a. The NFN consists of degraded wetlands with excellent opportunities for restoring and enhancing wetland functions; b. Opportunities exist for improving salmonid habitat by enhancing and restoring riparian functions associated with the Newaukum River; c. Opportunities exist for increasing the wildlife habitat, water quality, and water quantity functions at the site; d. The majority of WSDOT's proposed highway project impacts are in the same WRIA as the NFN site. 4. Existing Conditions The NFN contains a variety of different habitat types including wetland, stream, riparian, floodplain and upland habitats. The site also contains the confluence of the North and Middle Fork Newaukum Rivers. The Lewis County zoning designation for the majority of the NFN site (adopted April 4, 2002) is "Class B Agricultural Land". Other, smaller portions of the site fall within other zoning designations including "Class A Agricultural Land", Rural Development District 5, and Rural Development District 10 A total of 15 wetlands, comprising 149 acres, occur on site (Figure 5). Each wetland was delineated and rated using the 1993 Ecology Wetland Rating System. Two --2-- North Fork Newaukum Mitigation Bank Prospectus September, 2002 wetlands totaling 105 acres rated as Category II; nine wetlands totaling 42.25 acres rated as Category III; and two wetlands totaling 1.33 acres rated as Category IV. A. Vegetation The site is vegetated by herbaceous species typical of prolonged agricultural disturbance (e.g. soft rush, reed canarygrass, creeping buttercup, bentgrass, and Canada thistle). Approximately 25.28 acres adjacent to the Middle Fork Newaukum River, in the southeast corner of the site, consist of mature, native forest. The dominant species in riparian areas elsewhere along the Middle Fork and North Fork are red alder, western red cedar and Douglas -fir. B. Soils The USDA 1987 Soils Survey of Lewis County Area states that soil types found on the site typically support a variety of forested habitats, with dominant trees ranging from Douglas -firs and red alders in well -drained areas to red alder and Oregon ash in poorly drained areas. The survey describes eight soil types at the NFN: Alvor silty clay loam; Chehalis silty clay; Newberg fine sandy loam; Lacamas silt loam; Chehalis silty clay; Reed silty clay loam; Reed silty clay loam, channeled; and Scamman silty clay loam. The native plant communities for all but one of the soil units are identified in the survey as being mixed coniferous and deciduous forests. The one exception is the Reed silty clay loam, channeled, which is identified as being naturally vegetated by shrubs, grasses, sedges and a few mixed deciduous and coniferous trees. C. Hydrology Wetland hydrology at the NFN originates from three sources: groundwater, over - bank flooding, and precipitation. A clay "lens" located between 0 and 30 inches (0-80 cm) below the ground surface results in a seasonally high "water table". Over -bank flooding from the North and Middle Forks of the Newaukum River is relatively common during winter, and continually influences the floodplain topography and vegetation. Evidence of over -bank flooding includes the presence of debris, up to 2 meters high, in the branches of trees and tall shrubs in the floodplain. Many of the wetlands on site are seasonally inundated due to precipitation. Currently, agricultural drain tiles in the east unit are acting to lower surface and ground water levels causing the degraded functioning of wetlands. 5. Service Area Projects eligible for use of the NFN will be limited to those located within WRIA 23, the Upper Chehalis Watershed (Figure 2). The majority of impacts that will utilize the site for mitigation purposes are expected to come from the widening of the I-5 corridor through Lewis County within WRIA 23. 6. Protective Covenant and Partnerships A partnership between WSDOT and the NRCS has made it possible to permanently protect the NFN site. The NRCS has obtained a conservation easement on the 230-acre -- 3 -- North Fork Newaukum Mitigation Bank Prospectus September, 2002 site through the Wetland Reserve Program (WRP), and WSDOT has purchased the underlying land rights. WSDOT is not receiving credit for the wetland preservation area, as it is already protected by the NRCS conservation easement. Likewise, WSDOT will not be receiving credit for the riparian restoration activities being performed by the NRCS. This partnership has made it possible to restore and enhance the entire 230-acre site. Through the WRP, NRCS was only given enough funding to purchase a 230-acre conservation easement and to restore the riparian area adjacent to the North and Middle Forks of the Newaukum River. This provided the opportunity for WSDOT to purchase the underlying land rights and complete the restoration and enhancement of the NFN site. Lewis County will also be participating in the restoration and enhancement of the NFN site through a recent mitigation need from a bridge replacement project on the North Fork Newaukum Road. WSDOT and Lewis County have negotiated an agreement that will allow the County to use 3.87 non -credited acres of the NFN for mitigation. In exchange, the County has installed a culvert under the North Fork Road to facilitate WSDOT's mitigation plan. WSDOT will not receive credit for that portion of the site developed to meet the County's mitigation need. 7. Conceptual Site Design The NFN conceptual design plan includes four main components: 1) 0.53 acres of wetland restoration, 2) 91 acres of wetland enhancement, 3) 38.57 acres of riparian and streambank (a.k.a. shoreline) enhancement, and 4) 42.15 acres of upland buffer enhancement. Each of these 4 components is discussed below, summarized in Table 1, and detailed in Figures 3-7. Where the design plan includes excavation in restoration/ enhancement areas, the resulting displaced material will be spread on adjacent uplands and planted. All plantings on site will be installed at a density of 500 trees per acre in a triangular spacing pattern. A. Wetland Restoration (0.53 acres) The Corps defines wetland restoration as "the re-establishment of wetland and/or other aquatic resource characteristics and function(s) at a site where they have ceased to exist, or exist in a substantially degraded state". There are two separate restoration activities that will be conducted in the west unit. The first of these is the restoration of a seasonal drainage swale'. The seasonally inundated swale will be routed into an oversized culvert that will be constructed under the North Fork road allowing surface water to flow through its historic channel in the west unit to the Newaukum River. The second activity will include the removal of 0.53 acres of fill from the old channel in the west unit to restore the natural hydrology and increase wetland acreage. The restored wetland area will be planted to achieve native emergent wetland communities and Oregon ash forest. Restored wetlands with saturated soils, but lacking seasonal ponding, will be planted to attain one of two forest communities: 1) Oregon ash, or 2) mixed hardwood forest (Figure 7). ' The area within the channel of the seasonal swale is jurisdictional wetland. --4-- North Fork Newaukum Mitigation Bank Prospectus September, 2002 B. Wetland Enhancement Areas (91 acres) The Corps defines wetland enhancement as "activities conducted in existing wetlands or other aquatic resources which increase one or more aquatic functions" There are four wetland enhancement activities that are planned for the NFN site. These are described below: Type I Wetland Enhancement (4.26 acres) Excavation of several long -duration, seasonally-ponded depressions. They will be constructed within existing wetlands in various locations throughout the west unit labeled on the "Hydrology Restoration Plan" as "Topographic Enhancement Area `C"' (Figure 6). Type II Wetland Enhancement (21.41 acres) Type II enhancement involves the disabling of currently functioning drain tiles, the creation of long duration, seasonally ponded habitat (not currently present in the east unit), and reforestation, all of which would occur within wetland N. Functional drain tiles in the east unit will be disabled either by trenching or by deep tilling. Ponded habitat will be created by the detonation of explosive charges to achieve the desired depths and contours without using heavy machinery. It is expected that blasting will produce 1 to 3' deep depressions with a small earthen berm around the perimeter. Once functioning tiles have been disabled and ponded habitat has been created, the area will be planted to achieve an Oregon ash forested community (Figure 5). Type III Wetland Enhancement (63.33 acres) Degraded wetland areas, currently dominated by agricultural species, will be planted to achieve deciduous, native forest communities (figure 7). Type IV Wetland Enhancement (2.0 acres) Wetland M in the south unit will be supplementally planted with western red cedar and black cottonwood to accelerate the rate of natural succession to a native, mature, forested wetland. C. Riparian and Streambank Enhancement Areas (38.57 acres) Newaukum River Streambank Enhancement (13,610 linear feet [6.2 acres]) The plan calls for live -staked Sitka willow and red -osier dogwood to be planted, 2- 3 feet on center, along degraded sections of the streambanks of the north (9940 linear feet) and middle (3670 linear feet) forks of the Newaukum River. Riparian Forest (32.37 acres) The riparian floodplain areas will be planted with western red cedar, black cottonwood, and red alder. Riparian enhancement areas, located in the north (0.71 acre) and west units (31.66 acres), include uplands within 200' of the Newaukum River and low-lying depressions in upland areas that are within the 100-year floodplain. Riparian areas previously enhanced by NRCS are excluded from all calculations. -- 5 -- North Fork Newaukum Mitigation Bank Prospectus September, 2002 D. Upland Buffer Enhancement Areas (42.15 acres) Upland buffer areas will be vegetated with Douglas -fir, western hemlock, and red alder to provide protection and enhance the functioning of adjacent wetlands. E. Summary of Basic Project Construction Elements (Figures 3-7). These are the basic construction activities that will need to occur to implement the bank. 1. Installation of a culvert under North Fork Road to reestablish a hydrologic link between the north and west units of the NFN site. 2. Removal of a culvert and contouring of natural channel in the south unit. 3. Disabling of drain tiles in the East Unit. 4. Creating or deepening several shallow depressions in the east and west units using either a small bulldozer or explosive charges. 5. Installation of plant materials in all units of the site. Table 1: Mitigation Activity and Associated Acreage Mitigation Activity Description Acreage Wetland Restoration Removal of fill from historic wetland 0.53 Wetland Enhancement Type I Excavation of wetlands in west unit for 4.26 increased pond habitat Wetland Enhancement Type II Disabling of drain tiles in east unit 21.41 Wetland Enhancement Type III Tree planting in degraded wetlands 63.33 Wetland Enhancement Type IV Underplanting along edge of 2.0 preservation area Shoreline Enhancement Willow staking along North and 6.2 Middle Fork Newaukum Rivers Tree planting in areas not identified Riparian Enhancement above but within 200 feet of river or 32.37 within 100-year floodplain Upland Buffer Enhancement Tree planting in degraded upland areas 42.15 Total Creditable Acreage 172.25 Not -For -Credit Acreage (NRCS preservation/ riparian enhancement 58.16 areas, river areas, and Lewis County's mitigation area) Total Site Acreage 230.41 North Fork Newaukum Mitigation Bank Prospectus September, 2002 8. Potential Adverse Impacts to Aquatic Resources or Other Habitats From Bank Construction Construction and excavation activities were assessed for potential adverse impacts to aquatic and terrestrial wildlife resources in the Teitzel Biological Assessment (BA). The effect determination made by the BA was that restoration activities were "not likely to adversely affect" bald eagles, bull trout, coastal cutthroat trout or aquatic habitat. The BA was concurred upon by the USFWS (consultation #1-3-01-I-0943). Restoration activities are also authorized by the Corps' Nationwide 27 general permit (reference #2001-4-00182 WSDOT). The Corps will re -authorize the nationwide 27 permit once the MBI for the NFN is signed. 9. Demonstration of Financial Assurance Financing for the construction, operation, monitoring, and long-term management has been secured through a loan from WSDOT's Advanced Environmental Mitigation Revolving Account. The loan has already been utilized to conduct site analyses, produce a restoration and management plan, and install initial plantings at the site. Future road projects will pay back into the account as mitigation is required. WSDOT will use either this account or WSDOT's Mitigation Remediation Account to fund any necessary remedial actions at the site. 10. Monitoring, Long -Term Management, and Reporting A. Monitoring and Reporting After restoration and enhancement work has been completed, the NFN will be formally monitored, semiannually, over a 10-year period to ensure that the work is successful in meeting the various objectives of the bank. After the 10-year, formal monitoring period, WSDOT will continue to monitor the site informally for an additional 10 years. Formal monitoring involves the use of statistical sampling and is done in years when the site must meet performance standards. Informal monitoring involves visual site checks, photographic documentation, and other measurements as necessary in order to identify potential problems. Monitoring of the NFN site will be done by WSDOT's Wetland Monitoring Program. Data are collected on a variety of site parameters including soil, vegetation, hydrology, and wildlife. Monitoring activities for the bank are driven by site -specific performance standards detailed in the NFN MBI. Analysis of monitoring data provides information on site development and permit compliance. Annual monitoring reports will be provided to the BOC for review in years having formal monitoring requirements. Performance standards for the NFN will be established to provide a means to measure the bank's success at achieving its objectives. An example performance -- 7 -- North Fork Newaukum Mitigation Bank Prospectus September, 2002 standard for the goal of restoring 0.53 acres of wetland by removing fill from the west unit is: "In year 5, a delineation by a qualified wetland biologist will demonstrate that the restored area around wetland A meets the 3 parameters for defining a wetland as given in the Corps' 1987 manual." More information on the Wetland Monitoring Program, including examples of annual reports, can be found online at: www. wsdot. wa. gov/eesc/environmental/programs/wetmonlwetmon.htm#Annual%20Reports B. Long -Term Management and Maintenance WSDOT will use the monitoring results to guide site management activities. These activities may include fence and gate maintenance, checking for vandalism, and overall ensuring the site is continuing to function. After the 20-year monitoring period and/or all performance standards have been met, WSDOT may turn the site management over to a long-term natural resource entity to be selected under the guidance of the BOC. This entity will continue to maintain the site management activities with initial guidance from WSDOT. 11. Anticipated Credit Release Schedule Credits will be released in phases according to a 10-year schedule as negotiated with the BOC. WSDOT anticipates 35% of the total available wetland mitigation credits will be made available once initial construction activities have been completed and the site has been protected (this includes removal of fill from a wetland, disabling of drain tiles, restoration of a hydraulic connection between two wetlands, and excavating for long duration seasonal pond habitat). The remaining credits would then become available over the following 10 years as other performance standards are met. -- 8 -- t=N1T= 11c, 6t.- 5-4�- �'j tjgA D3 5 CITY OF RENTON a; Fire Department A. Lee Wheeler, Chief Kathy Keolker-Wheeler, Mayor July 26, 2005 RECEIVED CERTIFIED MAIL #7001 0360 0004 3912 1076 AUG 2 - 2005 CITY OF FiENTON UTUTY SYSTEMS Mr. Steven Kober Conoco Phillips 520 East "D" Street Tacoma, Washington 98241 Dear Mr. Kober: SUBJECT: Comments on Subsurface Assessment and Semiannual Status Reports This letter provides our comments on the Subsurface Assessment Report (5/05) and Semiannual Status Report (3/05) for the Renton Terminal. Also included in this letter is a follow up on items requested in our letter dated November 1, 2004. Subsurface Assessment Report (5127105) The Subsurface Assessment Report prepared by Secor documents the advancement of seven soil borings along the south side of the terminal. This work was done at the request of the City of Renton to determine if soils adjacent to SW 27`h Street have been impacted by the November 2002 release. The city is planning to widen this section of roadway in the near future, and soil contamination could delay or otherwise impact the project. The report indicates that soils in the offsite areas investigated do not appear to be impacted by gasoline or related constituents in depths ranging from two to six feet. Low concentrations of ethyl benzene and xylene were detected in ground water from borings B2 and B3, which were advanced near the terminal fence line. Based on the assessment report, shallow soils near the city right-of-way do not appear to be contaminated from the November 2002 release. Contaminants detected in ground water indicate that some soil contamination may be present at the soil/water interface, but the concentrations are expected to be very low. Semiannual Status Report (3/9/2005) The Semiannual Status Report prepared by Landau Associates provides a summary of the ground water sampling and remediation activities conducted at the Renton Terminal from July through December 2004. It appears that the remediation activities are slowly removing free product from the vicinity of tank 2 and controlling the spread of dissolved contaminants in ground water. Another goal of the remediation effort is to keep the recent release from commingling with the historic Exxon/Mobil release near the loading racks. 1055 South Grady Way - Renton, Washington 98055 - (425) 430-7000 / FAX (425) 430-7044 RE N T O N ® This paper contains 50 % recycled material, 30 % post consumer AHEAD OF THE CURVE Mr. Steven Kober Page 2 of 2 July 28, 2005 Status ofActions Requested in Letter from Renton Fire Department (111112004) In our letter dated November 1, 2004, the following items or activities were requested of Conoco Phillips: • Analytical results of soil samples collected from borings advanced along SW 27TH Street and the interceptor trench. • Tank testing results, including seismic analysis. • Tank floor retrofit schedule. • Corrective actions plan for remediation of November 2002 release. • Change of suppression foam. • Stability analysis of existing containment dike. • Most recent status reports for the Exxon/Mobil spill. The response letter received from Conoco Phillips dated December 2, 2004 addressed the requested items, with the following exceptions: • Automatic leak detection — The use of manual leak detection rather than automatic is a viable alternative, but only if the frequency is increased from monthly to weekly. • Submittal of environmental sampling data — We would like to see the frequency of status reports increased from semiannually to quarterly. Because the data is being collected quarterly, we would like to receive these results as soon as they are available. The reports should also include a summary of the remediation system operation status for the quarter. • Stability analysis of containment dike — The letter indicated that testing in the most vulnerable portion of the dike (southeast corner) was planned for the first quarter of 2005. As of this date, our office has received no testing results. • Status reports for the Exxon/Mobil spill — We understand that this release occurred under previous ownership of the terminal, but the status of this release and planned future actions must be evaluated and coordinated with other remediation efforts at the terminal. We are also interested in seeing reports documenting the tank testing and refurbishing activities, once complete. According to the schedule submitted in your letter, tanks 1 and 7 remain to be inspected and repaired. Any changes to this schedule should be communicated to our office. In order to keep this process moving forward, a response to this letter is expected within 30 days. We appreciate your continued cooperation through this process. If you have any questions regarding this letter, please contact me at (425) 430-7000. Sincerely, Stan Engler Fire Marshal SE/jh cc: Martin Cramer — Conoco Phillips Norm Peck - Department of Ecology Ron Straka — City of Renton Utility Engineering Supervisor 7 c, Ck" May 27, 2005 F-e- 1 ` U. 5 E C O R Mr. Marty Cramer ConocoPhillips — Risk Management and Remediation 5528 NW Doane Avenue Portland, Oregon 97229 RE: Subsurface Assessment Report ConocoPhillips Facility No. 3485 2423 Lind Avenue, Renton, Washington Dear Mr. Cramer: SECOR INTERNATIONAL INCORPORATED www.secor.com 12034 134th Court Northeast Suite 102 Redmond, WA 98052 425 372 1600 TEL 425 372 1650 FAx This report presents the results a subsurface assessment completed by SECOR International, Inc. (SECOR) on -site and off -site at ConocoPhillips Facility No. 3485, located at 2423 Lind Avenue in Renton, Washington (the site). The assessment consisted of drilling seven soil borings in various locations both on -site and off -site. The work was completed on the 27tt' and 28tt' of April 2005. The purpose of the off -site work was to assess subsurface soil in anticipation of road improvements planned by the City of Renton south of the site along SW 27tt' Street. The purpose of the on -site work was to assess the thickness of a subsurface silt layer identified during previous assessments. Results of the assessment are presented below. SITE DESCRIPTION The site is a bulk petroleum distribution terminal located in Renton, Washington on the west side of Lind Avenue Southwest. A site location map is provided as Figure 1. The site is located in King County in Section 30; Township 23 North; Range 5 East. The area is zoned Industrial -Heavy (IH) by the City of Renton. Existing site features at the bulk fuel plant include an office, maintenance building, fire system foam house, ticket shed, a vapor recovery system, three fuel additive tanks, one Jet A flush tank, seven aboveground storage tanks (ASTs), a truck loading rack located north of the ASTs and one stormwater retention pond located southeast of the ASTs. Each tank is surrounded by concrete block walls which are approximately 3 feet high and the entire tank area is surrounded by an earth containment berm for secondary surface spill containment. Surface drainage in the tank area is controlled by a series of gate valves in the concrete containment walls and these valves direct flow to a sump in the western portion of the tank area. Pipeline and pump manifolds are located between the truck loading rack and the ASTs. Site features are shown on Figure 2. P:\Staff\CONOCOPHILLIPS\3485 Renton\Off-Site Assessment\3485 Final Subsurface Assessment Report 052605.doc Mr. Marty Cramer May 27, 2005 Page 2 BACKGROUND Documents detailing the site's environmental background were provided to SECOR by Landau Associates, Inc. (Landau). A full understanding of the site's environmental background can be achieved by reviewing the various Landau documents. This report will focus solely on a November 2002 release because of the concern that this release may have impacted soils in the right-of-way along SW 27th Street. In November 2002, a gasoline release occurred from the bulk storage tank, Tank 2. Assessment activities conducted subsequent to the release indicated that subsurface soil and groundwater in the vicinity of -Tank 2 had become impacted with gasoline. Liquid -phase gasoline was present in on -site monitoring wells and a remediation system designed to recover the gasoline from the subsurface was installed. The purpose of the currently operating remediation system is to remediate subsurface soil and groundwater and prevent off -site impacts to the south of the terminal towards SW 27th Street. Off -site impacts have been identified in the form of dissolved gasoline in groundwater monitoring wells located on the north and south sides of SW 27th Street. Depth to groundwater in these wells ranges from six to ten feet below ground surface. Subsurface soils along SW 27th Street have not been evaluated to date and could be impacted by the Tank 2 release. Because road improvements planned by the City of Renton along SW 27th Street and adjacent to the terminal have the potential for encountering impacted soils, an assessment of the City's right-of-way was necessary. SCOPE OF WORK On April 27-28, 2005, SECOR subcontracted Cascade Drilling Incorporated (CDI) to advance six off - site soil borings along SW 271h Street and one on -site boring on a gravel road that runs along the site's west property line using a Geoprobe mounted drilling rig. Soil borings B-1, B-3 and B-5 were advanced to 9 feet bgs. Soil borings B-2, B-4, and B-7 were advanced to 13 feet bgs. When groundwater was encountered, the boring was advanced 4 feet below the depth to water. Boring B-6 was located west of the ASTs and advanced to a depth of 22 feet bgs to generally assess the deeper lithology at the site. Soil boring locations (shown on Figure 2) were chosen because of their proximity to the ASTs, and the road expansion area proposed by the City of Renton along SW 27th Street. Selected soil and groundwater samples were submitted to Severn Trent Laboratories (STL) in Tacoma, Washington for chemical analysis. FIELD ACTIVITIES CDI provided drilling services and a vacuum truck to clear borings, and Applied Professional Services, Inc. (APS) provided private utility locating services. SECOR personnel were present during all phases of the fieldwork. Details regarding fieldwork are described as follows. Pre -field Activities The following activities were completed prior to the start of field and drilling activities: PAStaff\C0N0C0PHILLIPS\3485 Renton\Off-Site Assessment\3485 Final Subsurface Assessment Report 052605.doc t Mr. Marty Cramer May 27, 2005 Page 3 A project -specific health and safety plan (HASP) was prepared for each phase of the field activities in accordance with federal regulations (40 CFR 1910.120). The HASP identified potential physical and chemical hazards associated with the proposed field activities, and specified personal protection equipment and safety monitoring requirements. All SECOR personnel and subcontractors working on -site were required to be familiar with and to comply with the provisions in the HASP. A tailgate safety meeting was held at the beginning of each day where all personnel reviewed the HASP and discussed potential safety hazards of the work planned for the day. Copies of the tailgate meeting sign -in sheets are provided in Appendix C. Prior to the start of field activities, SECOR arranged to have a municipal underground utility location service identify subsurface municipal utilities located in public right-of-ways adjacent to the site. In addition, SECOR contracted with APS to provide private utility locating services on the site. Prior to drilling, each boring location was cleared to 5 feet bgs using an air wand and vacuum truck for the purpose of determining if near -surface utilities exist that were not identified during the public and private utility locating activities. Drilling and Sampling Activities Soil borings B-1 through B-7 were advanced using a Geoprobe equipped drilling rig. Soil borings 13- 1, B-3 and B-5 were advanced to 9 feet bgs. Soil borings B-2, B-4, and B-7 were advanced to 13 feet bgs. Soil samples from B-1 were collected at 2, 4 and 5 feet bgs. Soil samples from B-2, B-3, B-4 and B-7 were collected at 3 and 5 feet bgs. Samples from B-5 were collected at 2 and 4 feet bgs. Soil samples from the borings were retrieved from acetate sampling sleeves. B-6 was advanced to 22 feet bgs and no soil samples were collected. All soil samples were uniquely labeled and placed in an iced cooler under chain -of -custody documentation pending transportation and analysis at the laboratory. Augers and samplers were decontaminated between borings to prevent cross -contamination. Following soil sample collection, soil from the sampler was placed into small, re -sealable plastic bags. The top of the bags were then closed and, following a lapse of approximately 30 minutes, a photo ionization detector (PID) was used to monitor the soils contained within the plastic bag for volatile organic compound (VOC) vapors by inserting the PID probe into the headspace of the bag. Results of these readings were recorded on the boring logs. The PID was equipped with an ultraviolet lamp of 10.8 electron volts (eV) and calibrated to a 100 parts per million isobutylene standard. The soil was classified in accordance with the unified soil classification system (USCS). USCS classifications are presented in the boring logs attached as Appendix A. SUBSURFACE CONDITIONS Soils encountered during the drilling activities consisted primarily of 9 feet of brown and gray, medium grained sands with some fine to coarse gravel, underlain by gray and brown silt or silty sands to approximately 19.5 feet, which is then underlain by dark gray, fine silty sands to approximately 22 feet below ground surface (bgs). Note that the subsurface soil conditions in the off - site borings were only investigated to a maximum depth of 13 feet and subsurface soil conditions in the on -site boring was investigated to a maximum depth of 22 feet. P:\Staff\CONOCOPHILLIPS\3485 Renton\Off-Site Assessment\3485 Final Subsurface Assessment Report 052605.doc 6 Mr. Marty Cramer May 27, 2005 Page 4 Groundwater was encountered at varying depths during the drilling activities. Groundwater was encountered in the brown, medium grained sands at 5 to 6.5 feet bgs in B-1, B-3 and B-5. Groundwater was encountered in the fine to medium grained gray to brown sands at 7 to 9 feet in B- 2, B-6 and B-7. Groundwater was not encountered in B-4. Detailed descriptions of the subsurface lithologies are shown in the boring logs attached as Appendix A. ANALYTICAL PROGRAM AND RESULTS Selected soil samples from B-1 through B-5 and B-7 were submitted to STL for analysis for TPH-g using Northwest Method NWTPH-Gx; and benzene, toluene, ethylbenzene, and total xylenes (BTEX) using United States Environmental Protection Agency (EPA) Method 8260B. Groundwater samples from B-1, B-2, B-3 and B-5 were submitted to STL for analysis for TPH-g using Northwest Method NWTPH-Gx and benzene, toluene, ethylbenzene, and total xylenes (BTEX) using United States Environmental Protection Agency (EPA) Method 8260B. Review of the soil sample laboratory data indicates the following: • TPH-g and BTEX constituents were not detected above the laboratory -set detection limits in any of the soil samples submitted for analyses. Soil sample laboratory results are summarized on Table 1 and are shown on Figure 3. Analytical laboratory reports and chain -of -custody documentation are included as Appendix B. Review of the groundwater sample laboratory data indicates the following: • TPH-g and BTEX constituents were not detected in any of the groundwater samples above the laboratory -set detection limits in borings B-1 and B-5. Ethylbenzene and xylenes were detected in below the MTCA Method A groundwater cleanup levels in groundwater samples collected from boring B-3. No other constituents analyzed from this boring were detected above the laboratory -set detection limits. Xylenes were detected in below the MTCA Method A groundwater cleanup levels in groundwater samples collected from boring B-3. No other constituents analyzed from this boring were detected above the laboratory -set detection limits. Groundwater analytical data are summarized in Table 2 and on Figure 4. Copies of the laboratory report and chain -of -custody documentation are attached as Appendix B. CONCLUSIONS A subsurface investigation was completed by SECOR to assess subsurface soil in anticipation of road improvements planned by the City of Renton south of the site along SW 27th Street. The purpose of the on -site work was to assess the thickness of a subsurface silt layer identified during previous assessments. PAStaff\C0N0C0PHILLIPS\3485 Renton\Off-Site Assessment\3485 Final Subsurface Assessment Report 052605.doc Mr. Marty Cramer May 27, 2005 Page 5 Results of the assessment indicate the following: • Soils in the off -site areas investigated do not appear to be impacted with gasoline or related constituents in subsurface soils ranging in depth from approximately two feet to six feet. • Groundwater in off -site boring B-3 contains detectable concentrations of ethylbenzene and xylenes. Concentrations are, however, below the State of Washington action levels. No other analyzed constituents were detected. Groundwater was encountered at a depth of approximately six feet in boring B-3. • Groundwater in off -site boring B-2 contains detectable concentrations of xylenes. Concentrations are also below the State of Washington action levels. No other analyzed constituents were detected. Groundwater was encountered at a depth of approximately eight feet in boring B-2. • A gray and brown silt layer was encountered at a depth of approximately 9 feet extending to a depth of approximately 19.5 feet below ground surface in the boring drilled on -site on the west side of the site. SECOR appreciates the opportunity to provide environmental consulting services to ConocoPhillips. If you have any questions regarding this investigation or wish to discuss the project in general, please contact us at 425-372-1600. Sincerely, SECOR International Incorporated Katlin Hanson Staff Geologist ATTACHMENTS: Ma S ze, .E. Project Engineer FIGURE 1 Site Location Map FIGURE 2 Site Plan FIGURE 3 Site Plan with Soil Analytical Results FIGURE 4 Site Plan with Groundwater Analytical Results TABLE 1 Soil Analytical Results TABLE 2 Groundwater Analytical Results APPENDIX A Boring Logs APPENDIX B Soil and Groundwater Analytical Laboratory Report APPENDIX C Tailgate Meeting Sign -In Sheets P:\Staff\CONOCOPHILLIPS\3485 Renton\Off-Site Assessment\3485 Final Subsurface Assessment Report 052605.doc FIGURES t •� :,�, f, r -;ter---.�.` - .. �q.�,� _,yew \ �� ; 1 ' -+ - ark 10 ��� � r23 ,� � � alai y` � / i "• �`� s 4 �/ a 24 ' oste� • • -` r• , ■■ a_ ire _i ~{ - — •_, _ = !" t�` - ...._ •jl C 'I U •••a 4 ♦<. 1 1. ��'; ; ` ♦`�, III' ♦� �' !� - 30 C a' I 25 1' 1— � r 9 I Tukwila t ' A t� i� ! .a i a il.J b ♦ 1 -+- A a Ali, • 43, Su North 1 1 /2 0 1 SCALE (MILES) 1000 0 1000 2000 3000 4000 5000 6000 7000 WASHINGTON SCALE (FEET) REFERENCE: USGS 7.5 MINUTE QUADRANGLE; RENTON, WASHINGTON, 1973 FOR: ?� FIGURE: FACILIITY � SITE LOCATION MAP 2423 LIND AVE SW 1 RENTON, WASHINGTON 12034 134th AVE NE REDMOND. WA JOB NUMBER: DRAWN BY: CHECKED BY: APPROVED BY: DATE: Phone: 425.372.1600 / FAX: 425.372.1650 01 CP.03485.03 RPE/ARA 5/12/2005 PATH: KAOTHER OFFICES WORK\REDM0W%A000ST\O3485 (TOPO).DWG MODIFIED BY AANOREWS AT MAY 23, 2005 - 9:36 FL'N Et r I i 4 r. 6z K-1 I Y IN if, -7 R, r7 it _ ' .• I #JA c er EK tI tr ..le 4 lrh°= i TABLES Lo 00 J ,a, M C W O u Z O 0) O J U Q co 00 Q F- Q d J O Z O M N J 00 N O O U N O M .-- t() I�t N O0 00 ti C. Y M " m N O O O CD Un N- rl- O0 O m N I- M LO to LO O V M (D o 0 - c- O - �- - - - - N- - - e-- CO r- r- - - - 6) N >+ E X O O O O O O O 00 O O O O O O 7 O V V v V V V V V V V V V V v V (D .--- N M N� M (D O M- 0) (D O M M to W 00 M U') O ;I- O ti ti co >, N Y M M � M M * It �t M M't co M U L C _ 0 0 0 0 0 0 o 0 0 0 (D 0 0 0 0 (D U W O E 0 0 0 6 0 0 0(D(D(D 0 0 0 0(D C L— v V V V V V V V V v v V I V I V V O CD N (N (V d- D) M O 00 00 B M O C) I -- C N `Y t M It M M (D Cl) O (D M LO I'* "t 00 Un � (` M 0 7 O O O O O Cl) O Cl) O mot' O O O M O M� O O M O Cl) O O E O O O O O O O O O O O O O O O H V v V V v V v V V v V v V V V 0 r N N d- (D M M- (D O 00 Lo 00 't M LO 0)M 't I-- O Y d' (`') CO co co _ It 0) M MIt Cl) It = It OD m M It (` 00 M CD O It O O o(D 0 0 0 0 0 0 0 0 M M 0 CD a� E 0 C)(D 0 0 0(D 0 0 0 0(D 0 0 Iq 0 0 m v v v v v v v v v v v v v v v = C_ a Y r- N N d- O M- CD OD 00 t M 0) 0)Il- O O C 4 4 M M M M M M E V v v V V V V V v v V V V v v(D Q� m L N'�t UO M tO (D M to M Un (D N It M LO (n M 4) O J O to U-) U() U() LO LO LO UO to LO V) LO LO LO Un N 0 0 0 0 0 0 0 0 O 0 O O O O C C N 0 N N N N N N N N N N N N N N N O O O O O O O O O It O It O It O It� O O O O Q 7 c O O ' � i to UO (o to (n to to to m m to to 0 U @....�-.. M m N N 4� m N't M N m m M N mm mm N m mmmm m Un mmmm(� U') t-- r- Q M E Z N L E C N � C C O N O d O O a)U 00 0 N W O 'O 0O O N L O1 2 ^ M L mQlU o a) W w 0) o o o rn m C c7 O CD E (D O r M E T - N � X L o N a) a) a) O c o N� N 0 o L o U 0 C c 0a)U U C a) O O U C Q U N E N C N m O N U 0 0 0-0 � t E U M O O O C O 'X C L O L . CO: _ o d c~' (D 3 a) `�°30000ma) 0 c� 0 U o f C II •C y OU II O O Q UO O IN = N U C ) U) -o Z Q -D Fes-- co vv (ca TABLE 2 GROUNDWATER ANALYTICAL RESULTS ConocoPhillips Site No. 3485 2423 Lind Avenue SW Renton, Washington Sample Identification Sample Date TPH Volatile Organic Compounds TPH-G (4�9/L) Benzene (N9/L) Toluene (u9/L) Ethyl- benzene (pg/L) Total Xylenes (pg/L) B1-W 04/27/05 <100 <1.00 <1.00 <1.00 <3.00 B2-W 04/27/05 <100 <1.00 <1.00 <1.00 2.69 B3-W 04/27/05 <1000 <10.0 <10.0 43.9 71.8 B5-W 04/28/05 <100 <1.00 <1.00 <1.00 <3.00 MTCA Method A Cleanup Levels 800/1000* 5 1,000 700 1,000 Notes: All concentrations in micrograms per liter (Ng/L) bgs = below ground surface TPH-G = Total Petroleum Hydrocarbons in the gasoline range by Ecology Method NWTPH-Gx. Benzene, toluene, ethylbenzene, and xylenes by EPA Method 8021 B. MTCA = Model Toxics Control Act (Chapter 173-340 WAC) <1.00 = Constituent concentration not detected above the laboratory reporting limit. "Gasoline -range hydrocarbon cleanup level is 800 pg/L with benzene present in the sample and 1000 pg/L with no benzene detected. APPENDIX A BORING LOGS PROJECT: ConocoPhillips Facilty No. 3485 WELL / BORING NO: LOCATION: 2423 LinaAve. SW, Renton, WA 131 STARTED: 4127/05 COMPLETED: 4/27/05 NORTHING: EASTING: DRILLING COMPANY: Cascade Drilling Inc. GROUND ELEV: M.P. ELEV: DRILLING EQUIPMENT: Cascade Drilling Inc. INITIAL DTW: 5 TOTAL DEPTH: 9.0 DRILLING METHOD: push probe STATIC OTW: BOREHOLE DIAMETER: 4" SAMPLING EQUIPMENT: I LOGGED BY: AW CHECKED BY: AW = W p j LITHOLOGIC DESCRIPTION w Q U a? a s i—C WELL 0 U o CONSTRUCTION < W � SP Bark landsca in SAND brown, medium grained with fine gravel and trace fines, moist, no odor 8:42 22.4 @2.5': increased fines 8:47 24.7 @T: gray 8:53 22.7 @4% coarse gravel and cobbles, gray 9:01 21.4 9;15 25.6 abandoned with @V: moist, saturated, gravel is rounded to 5 hydrated bentonite chips angular :25(w Boring terminated at 9' 10 (w) = water sampie taken 10 15 15 20 20 n O oC7 U O LU 1 [9 Yl m v 0 a U SECOR PROJECT NO. 01CP.03485.03 PAGE 1 OF 1 I.dmJarionnTlrurorpowled PROJECT: ConocoPhillips Facilty No. 3485 LOCATION: 2423 LindAve. SW, Renton, WA STARTED: 4/27/05 COMPLETED: 4/27/05 DRILLING COMPANY: Cascade Drilling Inc. DRILLING EQUIPMENT: Cascade Drilling Inc. DRILLING METHOD: push probe SAMPLING EQUIPMENT: w � p LITHOLOGIC DESCRIPTION Lu SP Bark landsca in SAND brown, medium grained with fine to coarse gravel and fines, moist, no odor 5 SM SAND gray, fine grained with silt and fine to coarse gravel, moist i0 OL SILT organic, brown black with wood fragments siL i organic, gray, meow Boring terminated at 13' (w) = water sample taken 15 20 WELL / BORING NO: B2 NORTHING: FASTING: GROUND ELEV: M.P. ELEV: INITIAL DTW: 9 TOTAL DEPTH: 13.0 STATIC DTW: BOREHOLE DIAMETER: 4" LOGGED BY: AW CHECKED BY: AW J W 0 w Z o a s w WELL Q F mU .. CONSTRUCTION (� 9:32 31.3 9:35 31.6 9:38 32.0 11 9:41 32.5 5 9:58 l I 134.2 EC0Dr% � PROJECT NO. 01CP.03485.03 10 1 PAGE 1 OF 1 PROJECT: ConocoPhillips Facilty No. 3485 LOCATION: 2423 Lind Ave. SW, Renton, WA STARTED: 4/27/05 COMPLETED: 4/27/05 DRILLING COMPANY: Cascade Drilling Inc. DRILLING EQUIPMENT: Cascade Drilling Inc. DRILLING METHOD: push probe SAMPLING EQUIPMENT: EL J y LiTHOLOGIC DESCRIPTION 0 c� 777777 SP Bark landscaping SAND brown, medium grained with fine to coarse gravel, cobbles, some silt, moist, no odor 5 @5': medium grained with fine gravel, saturated, odor OL SILT organic, brown, saturated Boring terminated at 9' 10 (w) = water sample taken IiE WELL / BORING NO: B3 NORTHING: EASTING: GROUND ELEV: M.P. ELEV: INITIAL DTW: 6 TOTAL DEPTH: 9.0 STATIC DTW: BOREHOLE DIAMETER: 4" LOGGED BY: AW CHECKED BY: AW ° WELLO V v0W n `. u CONSTRUCTION TION o 10:22 27.7 10:25 23.4 10:28 25.9 10:35 19.1 5 1:1 PROJECT NO. 01CP.03485.03 Lr tad 10 15 abandoned with hydrated bentonite chips PAGE 1 OF 1 PROJECT: ConocoPhillips Facilty No. 3485 WELL / BORING NO: LOCATION: 2423 LindAve. SW, Renton, WA B4 STARTED: 4/28/05 COMPLETED: 4/28/05 NORTHING: FASTING: DRILLING COMPANY: Cascade drilling Inc. GROUND ELEV: M.P. ELEV: DRILLING EQUIPMENT: Cascade Drilling Inc. INITIAL DTW: TOTAL DEPTH: 13.0 DRILLING METHOD: push probe STATIC DTW: BOREHOLE DIAMETER: 4° SAMPLING EQUIPMENT: LOGGED BY: AW CHECKED BY: AW }_- z O O LITHOLOGIC DESCRIPTION w H �O „ 3 z 0O o f n. c z L WELL y - Lu CONSTRUCTION Grass •� SP SAND brown, medium grained with trace silt, moist 8:40 19.9 • ••" " • @2:5': some fine to coarse rounded gravel, 845 . 21.1 some gray coloration @3': gray 8:50 16.7 9:00 2.4 5 5 @6': moist to saturated abandoned with 9:30 hydrated bentonite chips @T: gray 10 10 -- OL SILT organic, brown ML I LT gray, medium plastic Boring terminated at 13' 15 15 20 20 0 0 U K 'a O O a U SE OR PROJECT NO.01CP.03485.03 PAGE 1 OF 1 PROJECT. ConocoPhillips Facilty No. 3485 LOCATION: 2423 UndAVe, SW, Renton, WA STARTED: 4/28/05 COMPLETED: 4128/05 DRILLING COMPANY: Cascade Drilling Inc. DRILLING EQUIPMENT: Cascade Drilling Inc. DRILLING METHOD: push probe SAMPLING EQUIPMENT: o(L p LITHOLOGIC DESCRIPTION Boring terminated at 9' 10 (w) = water sample taken 1 20 WELL / BORING NO: B5 NORTHING: FASTING: GROUND ELEV: M.P. ELEV: INITIAL DTW: 6.5 TOTAL DEPTH: 9.0 STATIC DTW: BOREHOLE DIAMETER: 4" LOGGED BY: AW CHECKED BY: AW Ue I*-p E- WELL !- w" MO o- a W- CONSTRUCTION y 00 9:45 22.7 9:50 23.6 9:55 18.8 10:00 24.6 5 15 20 abandoned with hydrated benlonite chips PROJECT NO. 01 CP.03485.03 PAGE 1 OF 1 PROJECT: COnocoPhillips Facilty No. 3485 WELL BORING NO: LOCATION: 2423 LindAve. SW, Renton, WA BG STARTED: 4/27/05 COMPLETED: 4/27/05 NORTHING: EASTING: DRILLING COMPANY: Cascade Drilling Inc. GROUND ELEV. M.P. ELEV: DRILLING EQUIPMENT: Cascade Drilling Inc. INITIAL DTW: 8 TOTAL DEPTH: 22.0 DRILLING METHOD: push probe STATIC DTW: BOREHOLE DIAMETER: 4" SAMPLING EQUIPMENT: LOGGED BY: AW CHECKED BY: AW ►� Z 0 O U LITHOLOGIC DESCRIPTION w a w OO z o E n a - WELL o Q CO U o CONSTRUCTION c7 o Gravel fill Soft dia to 5' usina air wand and vacuum truck s� SP SILTY SAND gray, fine g moist to saturated 10 '� OL SILT organic, brown 15 — MIL I SILT with some silt, gray moderately plastic @18': lens of fine sand SP SILTY SAND dark gray, fine g SM Boring terminated at 22' 5 10 15 abandoned with hydrated bentonite Chips SECOR. PROJECT NO.01 CP.03485.03 PAGE 1 OF 1 PROJECT: ConocoPhillips Facilty No. 3485 LOCATION: 2423 LinctAve. SW, Renton, WA STARTED: 4/27/05 COMPLETED: 4/27105 DRILLING COMPANY: Cascade Drilling Inc. DRILLING EQUIPMENT: Cascade Drilling Inc. DRILLING METHOD: push probe SAMPLING EQUIPMENT: w J U) LITHOLOGIC DESCRIPTION d D O Bark landscaping SP SAND brown, medium grained with fine to coarse gravel and cobbles, some silt, moist, no odor Q4,5': gray 10 �10': saturated Boring terminated at 13' 15 20 WELL! BORING NO: B7 NORTHING: E4STING: GROUND ELEV: M.P. ELEV: INITIAL DTW: 7 TOTAL DEPTH: 13.0 STATIC DTW: BOREHOLE D(AMETER: 4" LOGGED BY: AW CHECKED BY: AW M v e F O j 9E x " WELL a � w" a o a g w CONSTRUCTION m D: m U �; 11:38 17.5 11:42 31.6 11:45 33.0 11:50 34.4 PROJECT NO. 01 CP.03485.03 15 abandoned with Hydrated bentonite chips PAGE 1 OF 1 PLANNING/BUILDING/PUBLIC WORKS DEPARTMENT Y Renton City Hall 1055 South Grady Way, Renton, WA 98055 ❑ UTILITY SYSTEMS DIVISION 425.430 7234 Fax: 425.430.7241 ❑ TRANSPORTATION SYSTEMS DIVISION 425.430-7321 Fax: 425.430.7376 To: DATE: JOB No. RE: WE ARE SENDING YOU ❑ ATTACHED ❑ Under Separate Cover via ❑ SHOP DRAWING ❑ PRINTS ❑ REPRODUCABLE PLANS ❑ SPECIFICATIONS ❑ COPY OF LETTER ❑ MESSAGE: the following items: ❑ ORIGINALS These are transmitted as checked below: ❑ FOR SIGNATURE APPROVAL ❑ APPROVED AS SUBMITTED ❑ RESUBMIT COPIES FOR APPROVAL ❑ FOR YOUR USE ❑ APPROVED AS NOTED ❑ SUBMIT COPIES FOR DISTRIBUTION ❑ AS REQUESTED ❑ RETURNED FOR CORRECTIONS ❑ RETURN CORRECTED PRINTS ❑ FOR REVIEW AND COMMENT ❑ ❑ PRINTS RETURNED AFTER LOAN TO US Copies to: From: IF ENCLOSURES ARE NOT AS NOTED, PLEASE NOTIFY US AT ONCE. PBPW5001 09/99 bh 06/20/2005 10:32 FAX 425 454 4189 EES BELLEVUE RECEIVED JUN 2 0 2005 �J�I ONE COMPANY CITY OF RENTON �J Many Solutions" UTILITY SYSTEMS Z 001/017 Fax ate: 6120105 F Number of pages (include cover): 17 Message To Name: Allen Quynn Fax No: 425-430-7241 Firm. City of Renton Phone No: 425-430-7234 City: Renton State: WA Re: 180th St. Grade Separation Pump Data Proieci: Springbrook Messy From: Name: Beth Peterson Fax No: 425-450-6238 CC: Phone No: 425-450-6286 Notes: Allen- am faxing you a copy of the pump data we received from the City of Tukwila. The pump station at 180"' Street is #16. Please let me know if you have any questions. Beth HDR Engineering, Inc. 500 106th Avenue Northeast, Suite 1200 Telephone (425) 453-1523 Page 1 of 1 Bellevue, Washington 98004-SW (425) 4%6200 Fax (425) 45a 7107 www.hd6nc.corn 06/20/2005 10:32 FAX 425 454 4189 MAY 19 '05 12:09PM TUKWILA DCD/PW EES BELLEVUE Z 002/017 P.2/17 ilia i�u ���II� IIIY 06/20/2005 10:32 FAX 425 454 4189 EES BELLEVUE MAY 19 '05 12:09PM TUKWILA DCD/PW Z 003/017 P.3/17 os 0191 r�CD LJ c I� in 00 ai M m rr•A� VI N HT rn N d? 1n m N N N cr0 r � N !A Q a m O d to Co � M co N � N r c W O 0 Y7 � _ a m NN m M O 1 m 0 O '3 O v c4 O �N -q Lrl I,- NN w 00 ao 00 ,I- lq- v rn y lri v� VJ W� m v 06/20/2005 10:32 FAX 425 454 4189 EES BELLEVUE MAY 19 '05 12:09PM TUKWILR DCD/PW Z004/017 P. 4/17 I I r I ��un� in �iii 06/20/2005 10:33 FAX 425 454 4189 EES BELLEVUE MAY 19 '05 12:10PM TUKWILA DCD/PW Z 005/017 P.5/17 cn a o 0 0 r o O fQ tq ® O Ott e— e' tnL� co co r CY) <" 3 m - ft U) tD O to 0 0 0 1- - 0 0 O O t] O f4 N tD � 00 L7 ail Cn LO M �.- fQ .a. U? O O O O ado Lry th � T� O o a a o6 o 0 ►- CV Co C7 ►C ] Ctn cN7 cc% Q CD v CD (D LD p c-i 4 N r co co N thr O u') 4rLo r CfJ CG � V' m CO co o r. m o N ct to t6 tD cD I� y co c 000) w co co to vim. © Cn 0- EL L� 0- a- ft- iL CL ;t � Vl Rd�4t1.11. Q.tl lL 06/20/2005 10:33 FAX 425 454 4189 MAY 19 '05 12:10PM TUKWILA DCD/PW EES BELLEVUE Z 006/017 P.6/17 Q,r�o ov �aa ea w N Q O Y � to N cV frro N7 kA O (D G O O m o Q N N N LO U-) r r d O O O Q LZ O �k SJi 0o ao o 0 m = t - o> Ln v � N N O N N C M N Q lQ Q ti CM W r En p N M `' M m V. y Lq N IT 1l7 M M w � c14 N "- g .� o � M~ r b CD p '� N � M 00 N n M O D N o irC� afry- U U cc —zzz=rcoco0co .�prNcoa �-NM `cL a- ddaan.� acnaaaa��aau. 06/20/2005 10:33 FAX 425 454 4189 MAY 19 '05 12:10PM TUKWILA DCD/PW EES BELLEVUE Z 007/017 P.7/17 moo. o a to N N �n ocoavin o0 d o O o 1 N m o Ln r� N N v 'IT N col 0 o ci t lo I f I N r tt c7 O d 0 O to Q O V n O Q fl- t.A co m ch N N c c c N t7 C 3 F.- p vv atr mM CD � Lf)M r w :Q 0 S 2 O O 00 cli OD 0 a� o rn co rn o p N CS1 t� rn co CD w � CS M f7 mD N �� ZY=�t�tn tntl� w Q r tV CO q:r T- N f"') `4 — a. a a.a n. n a» sa aaa n�» �aa.»» 06/20/2005 10:33 FAX 425 454 4189 EE5 BELLEVUE MAY 19 '05 12:11PM TUKWILA DCD/PW Z 008/017 P.8/17 O O � a O IOIC31 0 0 cc o w CU m lD C 7 :mil 00 .:g in Ln 0 N r (fl N CV N QD LO r ,r d a a O boo 0o ao tool c4 c0 (fl (O N 31) t. h N N 0 o o v � � o co 0 r-�co LnCD as •-- h co it o N C N N 03 rn co p p CM 21 0 ` r 0 co 0 OD r aD v Ct r Q Q °ZZ:r:rZ: At/�t0 O rNM 'IT �CN M -q- P!aaaaaaaaCL H Oo a�naaaa.aaaa� 06/20/2005 10:34 FAX 425 454 4189 EES BELLEVUE MRY 19 '05 12:11PM 7UKWILR DCD/PW Z 009/017 P.9/17 eQ a o m cn Ln Ln tp O O C7 C� 0 0 p 0 r N N Ln � co U O O O O a C �t N O cbco to m O o N N O Cb O O W O 0 N N U7 to F r m to m M m � N r N 0 c O N (0 (p ►� 1 b cc eT co cN cn r cnis N O ft � r7 M ++}}I�N O N7 wc7to G�MO O w # LO W m trro .m v� w00co0 a,�n-aIa LrLOLc2u 06/20/2005 10:34 FAX 425 454 4189 EES BELLEVUE MAY 19 '05 12:11PM TUKWILA DCD/PW Z 010/017 P.10/17 CO O Go vl- O 4b A w N N O O d 0 0 w O O O O o 0 m N o 0 00 Cl �t m m co ao 01 O N N 4L O O O O 00 d O N c+� 00 00 Ln V) w O CO m fl- W t7 N T- N O o is � n CD m r� w y w Uii C c(om ~ (9m -tLO r w 2 C r lV V N co CQ p N cn M h h w (f� y (� ao.aa.a.aa_a� F Q $ O ,H rl n,cnaaaaa.aaCLI L.L. 06/20/2005 10:34 FAX 425 454 4189 EES BELLEVUE MAY 19 '05 12:12PM TUKWILR DCD/PW Z 011/017 P.11/17 w . CO 0000 fa w N o voommo r CO o N Z N 0 0 01 0 NN IE r O (n O O o C� 0 v (n tD cfl LI) CD 43 N O O O O O O r C) N N M LO c� W w 0 c ltl C ch O N N � tp ,n m m T y CJ3 �t N m m M Q O t0 a� CA Cfl p � co m C D (D N N C)r— C)-T C) ` N tV C7 N c, co co ou �O 4! (14 cv b la m y y �22=DED-- U�U� Z!O r-NOvr-NM tf V) aaan-acia0.� »>»n::)-i ac��aaaaaa0-LL 06/20/2005 10:35 FAX 425 454 4189 EES BELLEVUE MAY 19 '05 12:12PM TUKWILA DCD/PW �012/017 P.12/17 N N E C^ O Cd Cn 0 u O O c� L m U) G i W r N U) Cp N CD CD NM 0CACAN N N co � C1 m O O O O � 00 ta ea U o y 0 o O p ap C7 � R OCD COS N N r. �O to NCD T- T- m n y ik � O co to C� c*) O t0 a Q CpN OO N Cv e- m C'> lAco C� O N tY C{i rT in A y h � ���QCUUUU aaaa.aa� aa� Qcnaa=_a.10- 06/20/2005 10:35 FAX 425 454 4189 EES BELLEVUE MAY 19 '05 12:12PM TUKWILA DCD/PW 4 013/017 P.13/17 co r (n �n O r tD Cf)co O o 4t A rat T � O . p � T� � r r QS w N O O O O 4 O 0 cil 0 LO C� O N cv U) O ti O o � O O ;ar N co m co .ig co c� cor to Ccs r d O � 0 cD c�LD Lo NN fu N V� r-7 co O `- m ``) � v N a �• LO L - -- v� O � g to m cplx)co O �N{ritilCi cmOmto tDfflcD a y cac(xrcac�0C-)0 s z T- (n (n t0 (P C)� N cryC. c^�i V am LL_ g- C- W W C a a��an'a on- 06/20/2005 10:35 FAX 425 454 4189 EES BELLEVUE MAY 19 '05 12:12PM TUKWILA DCD/PW Z 014/017 P.14/17 O o cc Q e 4t (p c 0) T r CQ t N m w O O O O O O O 0 Qt?OO ClQ n CD ti co ij O N co O O � � O 93 ''Mww V/ m (N N IIV^ VJ O CQ O O w O CP r` V) CD ti � C0 � CIS; ED O Cl) (p CN co LD r o M N W O Nt N 0- N r N Ltd 'IT m M CO (0 f6 w cn w N (D co t- Cft �j� NN m t- U) COp yN riQtt o r0� rn 0 a� tE G �% CCiY�(7()C-) Z L1"i1(nco6)U-) t- ;E - n� �J�.1�DZ) Q. �5) EL E t, 'te r a-C—L LL 06/20/2005 10:35 FAX 425 454 4189 EE5 BELLEVUE MAY 19 '05 12:13PM TUKWILA DCD/PW Z 015/017 P.15/17 III�II I��n �III� I�II� 06/20/2005 10:36 FAX 425 454 4189 EES BELLEVUE MAY 19 '05 12:13PM TUKWILA DCD/PW Z 016/017 P.16/17 o a � Q U) U) O r O n O r p O O O U O T v/ C? N N C) q- j j ti tv ( r � w CJ O O O O O w a ct Ol O O O O GD O O IQ w cV co * M � co O O m a.. N mtn O t0 r r M C') g cn m co c� N N N M ulS to (0 od m N Ln as C)GOO p 0000 C M M r o7r� OJ�?(O O a N CD Q) Qy r- r N m c*? , •- r h A y fi acrC��UUUU °z sz=zcntJA(J)tl) 0 N cM 'cY r cV M a p a.aaaaaaa H D A D D-D n J a(A Q.lLczaaa a0 cL 06/20/2005 10:36 FAX 425 454 4189 EES BELLEVUE MAY 19 '05 12:13PM TUKWILA DCD/PW Z 017/017 P.17/17 cb N E C 73 Of 06 O O O U t C O t� (n tO 00 TN m w C:1iGdOC�QQ ONOO (Q N CD cj "Cl N CD Irl w 0 d O O O �j p t4 w tX} �r r QJ 0 G O CD m O 6 N IT Mco N to to cn Q N co w � � N N r N r 0 o e� � o n ct LO to N co Q) e`a f0 O� M. co U) fD co .r. N CD v N Q o m O O R' to O �N t�00, co O O H � w Z Z Z 2 Z iq Cn Cn (n O CO '14- �t y� LLa..ad MCLM0- Q 0 aV) Q4.QCI�GLR, tilt. -- - ...... -- --- - Ronald Straka--- Re: Elevations for Springbrook Trail Section Page 1 From: Ronald Straka To: Allen Quynn; Leslie Betlach Date: 07/25/2005 11:49:42 AM Subject: Re: Elevations for Springbrook Trail Section We have reviewed the 100-year floodplain elevations against the topography for Unit A where the trail is planned. The maximum distance between the existing ground elevation and the elevation of the bottom trial deck low chord will range between approximately 5.0 feet to 8.0 feet depending upon where the trail is located. This includes a 1-foot separation between the 100-year water surface elevation of 17.7 NAVD 88 and the bottom of the trail. Please use this information in preparing a conceptual section for the trail and we can refine the exact elevation as part of the project design. This is based upon our draft FIRM update map that we have submitted to FEMA for approval. If we follow the existing FEMA floodplain map, the maximum distance between the ground and the bottom of the trail would increase to approximately 7.5 feet to 10.5 feet. If you have any questions, please contact me. Ronald J. Straka, P.E. City of Renton Surface Water Utility Engineering Supervisor 1055 S. Grady Way - 5th Floor Renton WA 98055 Phone: 425-430-7248 Fax: 425-430-7241 Email: rstraka@ci.renton.wa.us >>> Leslie Betlach 07/21/2005 3:22:33 PM >>> Hi Allen, I have the Landscape Architect lined up to prepare some sections of the proposed Springbrook Trail. As soon as you determine the 100 year flood elevation we can commence the work (sooner the better). Thanks, Leslie Leslie A. Betlach Parks Director City of Renton 1055 South Grady Way Renton, WA 98055 Ibetlach(a)ci.renton.wa.us 425-430-6619 CC: Beth C. Peterson; Drew Coombs; Jim Brennan; Sharon L. Wright - SEA 6 A CITY OF RENTON PLANNING/BUILDING/PUBLIC WORKS MEMORANDUM DATE: February 28, 2005 TO: Abdoul Gafour FROM: Allen Quynn SUBJECT: Springbrook Creek Wetland and Habitat Bank Utility Conflicts As you maybe aware, the City and WSDOT are working collaboratively to develop a Wetland Mitigation Bank using several parcels in the valley surrounding Springbrook Creek. As part of the design process, WSDOT would like to know the location of existing utilities within the proposed bank. I've enclosed a map showing the location of the proposed bank sites and request that you identify any water facilities that are located within the bank sites (please include size of facility). WSDOT is only looking for schematic level detail. They will pull as-builts at a later date. I would appreciate it if you could get me the updated map by March 4. Gt1CAAc�9� t W -YW y00% Enclosure ?6nls 6,geh N3� H2� Z51 12 3f31��' HAFile Sys\SWP - Surface Water Projects\SWP-27 - Surface Water Projects (CIP)\27-3170 Springbrook Creek Wetland and Habitat Bank\1101 Des ign\util ities\water request.doc\cor I� DATE: CITY OF RENTON PLANNING/BUILDING/PUBLIC WORKS MEMORANDUM February 28, 2005 TO: Dave Christensen FROM: llen Quynn r SUBJECT: Springbrook Creek Wetland and Habitat Bank Utility Conflicts As you maybe aware, t City and WSDOT are working collaboratively to develop a Wetland Mitigation Bank using eve parcels in the valley surrounding Springbrook Creek. As part of the design process, WSDOT �u�like to know the location of existing utilities within the proposed bank. I've enclosed a map showing the location 63Yke proposed bank sites and request that you identify any sewer facilities that are located within Sw bank sites (please include size of facility). WSDOT is only looking for schematic level detail. ey will pull as-builts at a later date. I would appreciate it if you could get me the updated map�bKMarch 4. La-kAVId Enclosure HAFile Sys\SWP - Surface Water Projects\SWP-27 - Surface Water Projects (CIP)\27-3170 Springbrook Creek Wetland and Habitat Bank\1101 Design\utilities\sewer request.doc\cor n ow MS i ,ry A y,M1 40, }4 iFH T I M'thP r4N� \: m zm D 4 o a O N A STEEI _PIPC CASING p> INSTALL UN,ER E%ISTING TRACK w O n 841h AVE. S. Nm �N iNN pOGaNONNO (� r xryyo O,'lnp1N a. '�1^1 N zO A0 L`iU O O�Ov Ulm Qqc N z m; ' In�0 -4 0 m s _ b ^L rm N e n� T25 ( LX 2 D XT mr 6-00 MATCH LINE iV 13 - f m O N N x f a � m N C O E' N F•' y Qo tAn 2 i N 7E •'— j vV I b 78 rr�TN-w Irk, O N 1E 2'.472.Q5 r�ii 4A 3�� m G s `A z h I°T l Z 2�PC' C 3 A 00 N m � ` rmN O � N iK >� ,O NN m 0 ° -0 s m } —'11 00 I I- !^ z Z Z g G - m m 0 _ � a 7 LINp _. ° t l = VCND..._ UE -- .— i^ I s �\ A�/ \ •�, ', Zce Vi \ o0 n , m f LR x r I \ P. _ \UTICI CON LIN R L A N \ N_ N ,; / Ap \ K+32 27'R ►f G0 1-12 45. Dwd MJ a W O�( d9 II N 00 �• s3'ti, Np A. os0 R'N y N �.C; N �QD \\jZ 2 N N f W ;x � b N e it m � N ; � x n � nNi N n r' µ N D � O K �a A 1 "-127' u- N N. � -- NN� 3 � LN I.23'23" E 1 <r pp 01 01 N x r 0 0 00 00 m 41h S.W. t9 •P N v 1 a R N ppp++ V 8+00 MATCH LINE N O / / N m z 0� r N Ln 3 s0.np2 Oaf ; 'pp� N ++A 3 s A.' er Congestion Relief & Bus Rapid Transit Projects August 17, 2005 TO: Bank Oversight Committee (BOC) FROM: Springbrook Bank Project Team - Beth Peterson - Hans Ehlert Subject: Springbrook Creek Review Materials for BOC Meeting September 20, 2005 Included in this packet are the materials we are submitting for the BOC to review in advance of the September 20, 2005 meeting. The meeting location is still being determined (either at USACE or WSDOT Corson Office). We will confirm the location when we send the meeting agenda. Included in this packet are: • Design Overview (precursor to MBI Chapter 2) • Design Overview Maps (Overview, Units A/B, Unit C, Unit D, and Unit E) • Trail Proposal and figures • Grading plans, planting plans, and cross sections (from 30% design) • Plant materials list for each unit (Treatment schedule) • Tables of wetland function attributes for each unit. • Drainage District letter. The following documents were not yet ready at the time this packet was sent. However, we will be sending them to you by September 1, which should still provide you sufficient review time. • Unit C Water Balance Memorandum • Hydrologic Analysis to Support Vegetation Establishment at Units A, B, and E Memorandum We look forward to a productive meeting on September 20, 2005. Amok ,7Washington State w, Department of Transportation Design Overview Springbrook Creek Wetland and Habitat Mitigation Bank August 10, 2005 Introduction and Purpose The enclosed maps and summaries describe the design for the Springbrook Creek Wetland and Habitat Mitigation Bank (Springbrook Bank). This information includes analyses based on recently completed hydrologic modeling, field studies, and surveys. The cross sections, functional assessment tables, hydrologic memorandum, and updated design information are being provided to discuss the proposed mitigation treatments during the September 20, 2005, meeting with the Bank Oversight Committee (BOC). The purpose in discussing the information at this time is to incorporate BOC feedback on treatments, credits, and ratios into the Mitigation Bank Instrument (MBI) and preliminary (30%) design. Summary and Conclusions This Design Overview provides a discussion for each unit of Springbrook Bank that includes a section on existing conditions, mitigation treatments, functional gain, and proposed ratios based on feedback received over the last year from the BOC. The hydrologic modeling has been completed, and the conceptual design incorporates the findings to establish wetland vegetation. The land survey and other field data have been incorporated to update treatment acreages, which have not changed substantially from the initial concept, and yield 48.1 mitigation credits based on the ratios that have been discussed with BOC. Mitigation treatments at Springbrook Bank focus on restoring multiple functions and natural processes of wetlands. In general, the units along Springbrook Creek are designed to improve the hydrologic regime for wetland habitat and improve floodplain function. Relevant supporting information available in other project documents includes: • Design Overview Maps (Overview, Units A/ B, Unit C, Unit D, and Unit E) • Trail Proposal and figures • Grading and planting plans and cross sections (30% design) • Plant materials list for each unit (Landscape treatment schedule) • Tables of wetland functional attributes for each unit. • Unit C Water Balance Memorandum • Hydrologic Analysis to Support Vegetation Establishment at Units A, B, and E Memorandum SRINGBROOK_DESIGN OVERVIEW_8-10-05.DOC DESIGN OVERVIEW SPRINGBROOK CREEK WETLAND AND HABITAT MITIGATION BANK Table 1. Acreage Summary by Mitigation Treatments and Unit for Springbrook Bank Mitigation Treatments Acreage Unit A Unit B Unit C Unit D Unit E Total Wetland Re -Establishment 0.07 0.12 10.24 -- 7.97 18.40 Wetland Rehabilitation 22.25 31.43 3.56 2.63 -- 59.87 Wetland Enhancement -- -- 24.21 2.97 -- 27.18 Riparian Enhancement 1.17 1.49 -- -- 2.50 5.16 Upland Habitat Enhancement -- -- 6.66 -- 2.64 9.29 Buffer Creation 2.82 3.45 1.63 -- 2.11 10.01 Totals 26.32 36.49 46.29 5.60 15.21 129.91 Table 2. Summary of Mitigation Treatments, Ratios, and Mitigation Credits Mitigation Treatments Acreages Ratios Credits Wetland Re -Establishment 18.40 1:1 18.40 Wetland Rehabilitation 59.87 3:1 19.96 Wetland Enhancement 27.18 4:1 6.79 Riparian Enhancement 5.16 5:1 1.03 Upland Habitat Enhancement 9.29 5:1 1.86 Buffer Creation 10.01 -- -- Totals 129.91 -- 48.04 What's the Strategy for Establishing Woody Vegetation at Springbrook Bank? The Springbrook Bank design team has used baseline conditions, hydrologic modeling, horticultural experts, and local reference sites to develop a comprehensive strategy for establishing woody vegetation at Springbrook Bank. This strategy is aimed at maximizing wetland functions and processes and minimizing establishment of invasive, non-native weeds such as reed canarygrass and Himalayan blackberry. WSDOT will promote woody plant establishment by: • Reducing competition. Substantial areas within units at Springbrook Bank will be graded and/or cleared and grubbed, which will decrease competition for plantings and aid initial woody plant establishment. Using a layer of mulch in areas where reed canarygrass previously dominated will also decrease competition. • Creating variable topography. Variable or micro -topography will create varied growing conditions for plant establishment within graded and/or cleared and grubbed areas. Creating slightly wetter and drier areas will increase the likelihood that plantings will have proper growing conditions. SRINGBROOK_DESIGN OVERVIEW_8-10-05.DOC DESIGN OVERVIEW SPRINGBROOK CREEK WETLAND AND HABITAT MITIGATION BANK • Seeding all disturbed areas immediately following site construction. Disturbed areas will be hydro seeded with native grasses, sedges, and rushes to establish groundcover. Rapid establishment and cover with native herbaceous species will minimize colonization by RCG. • Densely planting native woody species that are aggressive. Planting densely (3,000 stems per acre) has been effective in competing with RCG (Celedonia, 2002). Wetland plantings will consist of deciduous woody species that are flood tolerant, native to the project area, and fast growing. • Replacing failed plantings. Failed plantings will be replaced with species from the planting plan. Replacement plantings may be relocated or substituted with other species from the planting plan to improve success. • Monitoring for and minimizing weed establishment. Reed canarygrass and Himalayan blackberry will be controlled if it prevents the performance standards for woody vegetation from being met. Direct controls, both mechanical and/or chemical, will be used to reduce competition with plantings and to limit expansion of RCG colonies. SRINGBROOK DESIGN OVERVIEW 8-10-05.DOC DESIGN OVERVIEW SPRINGBROOK CREEK WETLAND AND HABITAT MITIGATION BANK Summary of Existing Conditions, Proposed Mitigation Treatments, and Functional Lift for Units at Springbrook Bank Units A and B Existing Conditions Hydrology. Springbrook Creek flows within a straight, bermed corridor between Units A and B. Precipitation and stormwater inputs from adjacent roads and development are the primary sources of existing hydrology in Units A and B. The berms along Springbrook Creek disconnect the creek from its wetland floodplain in Units A and B. A small ditch exists in the northwestern portion of Unit B and is the only existing connection, albeit narrow, between Unit B and Springbrook Creek. A ditch along the southern property line in Unit A collects stormwater from the development to the south and directs flows to Springbrook Creek. Vegetation: Areas in Units A and B closest to Springbrook Creek have substantial existing native woody cover consisting primarily of Pacific willow, Sitka willow, and some black cottonwood. Areas farther from Springbrook Creek are dominated by reed canarygrass and cattail with patchy woody cover by willows. Reed canarygrass almost exclusively dominates the riparian areas on the berms directly adjacent to Springbrook Creek. Proposed Mitigation Treatments Mitigation treatments in Units A and B include wetland re-establishment, wetland rehabilitation, riparian enhancement, and buffer creation. Units A and B are contiguous with each other and are adjacent to Springbrook Creek. Proposed mitigation treatments, acreage, ratios, and credits for Units A and B are summarized in Tables 3 and 4, respectively. Associated with but not included in Unit B is a small wetland mitigation area already developed by the City of Renton to compensate for impacts to wetlands from extending Oakesdale Avenue. Table 3. Unit A Proposed Mitigation Treatments, Acreage, Ratios, and Credits Mitigation Treatments Acreage Ratios Credits Wetland Re -Establishment 0.07 1:1 0.07 Wetland Rehabilitation 22.25 3:1 7.42 Riparian Enhancement 1.17 8:4' 0.23 Buffer Creation 2.82 -- Totals 26.32 7.73 SRINGBROOK DESIGN OVERVIEW 8-10-05.DOC DESIGN OVERVIEW SPRINGBROOK CREEK WETLAND AND HABITAT MITIGATION BANK Table 4. Unit B Proposed Mitiqation Treatments, Acreage, Ratio, and Credit Mitigation Treatments Acreage Ratios Credits Wetland Re -Establishment 0.12 1:1 0.12 Wetland Rehabilitation 31.43 3:1 10.48 Riparian Enhancement 1.49 5: [' "'�� 4J his�n 0.30 Buffer Creation 3.45 — -- Totals 36.49 10.90 Major Construction Elements • To increase hydrologic connection of wetlands in Units A and B to Springbrook Creek, three berm sections in Unit A and four berm sections in Unit B will be excavated (2-3 feet deep by 20 feet wide). • To prepare the treatment areas for grading and planting, all plants up to 4 inches in diameter will be selectively cleared and grubbed within the 40-foot buffer area around the perimeter of Units A and B, within the riparian area next to Springbrook Creek, and within areas dominated by reed canarygrass. The wetland re- establishment area will be fully cleared and grubbed. • To increase the plant diversity, structure, and cover of woody plants and reduce competition from reed canarygrass, dense native woody plantings will be installed (3,000 stems/acre). • To improve habitat structure, vertical snags, brush piles, and anchored logs with root wads will be placed throughout Units A and B between the buffer areas and berm adjacent to Springbrook Creek. • To meet the City of Renton s trails plan and to increase environmental education, a missing section of Springbrook Trail is also being proposed to extend through Unit A as part of Springbrook Bank. See the Trail Proposal for more detailed information. Wetland Rehabilitation Area Wetland rehabilitation is the dominant mitigation treatment within Units A and B. It includes the 31.43-acre area bounded by the perimeter buffer and berm next to Springbrook Creek. The creation of hydrologic connections 20-feet wide through the berm in Units A and B will allow the floodplain wetlands to function at stream elevations greater than 12 feet. The bottom elevation of the openings cut into the berm will match the existing wetland elevations (approximately 12 feet in elevation). These modifications are expected to re-establish hydrologic connectivity between Springbrook Creek and Units A and B, augment wetland hydrology in Units A and B, and increase stream interaction with the floodplain to potentially reduce the elevation and duration of peak flows in Springbrook Creek. Supplemental water diverted from Units C and D could also benefit Unit B via an existing pipe under Oakesdale Avenue. Within approximately 10.8 acres currently dominated by reed canarygrass, selective clearing and grubbing and herbicide treatment will be used to remove reed canarygrass SRINGBROOK_DESIGN OVERVIEW_8-10-05.DOC DESIGN OVERVIEW SPRINGBROOK CREEK WETLAND AND HABITAT MITIGATION BANK and other invasive, non-native vegetation. Within this area, minor grading will also occur to create micro -topography to provide additional habitat niches and hydrologic regimes, which will facilitate the establishment of a diverse plant community. Areas dominated by existing trees and shrubs will be protected from clearing, grubbing, and grading. A minimum of 3 inches of bark mulch will be placed in the cleared and graded area prior to installing Oregon ash, red -osier dogwood, Sitka and Pacific willows, and peafruit wild rose ("Wetland Shrub #2" on Planting Plan). Dense woody plantings of 3,000 stems/acre will limit opportunities for reed canarygrass recolonization and in time limit dominance of reed canarygrass by restricting the availability of light. Dense plantings densely have been effective in competing with RCG (Celedonia, 2002). Woody species appropriate for the various hydroperiods will be planted as live stakes and bare - root as indicated on the planting plans. Plantings will consist of deciduous woody species that are flood tolerant, native to the project area, and fast growing. Disturbed soils will also be seeded with a mixture of herbaceous species to compete with reed canarygrass and control erosion. Vertical snags, brush piles, and anchored logs with root wads will be placed throughout Units A and B between the buffer areas and berm adjacent to Springbrook Creek. Wetland Re -Establishment Area The 0.12-acre wetland re-establishment area includes wetlands to be re-established where sections of the berm next to Springbrook Creek will be excavated. Soils will be amended with compost mulch to improve soil fertility and organic matter content. Native woody plantings will be installed and include Oregon ash, red -osier dogwood, Sitka and Pacific willows, and peafruit wild rose (see Planting Plan). Riparian Enhancement Area The 1.49-acre riparian enhancement area includes the unexcavated area of the berm and embankment next to Springbrook Creek. Selective clearing and grubbing and herbicide treatment will be used to remove reed canarygrass and other invasive, non-native vegetation. Native woody plantings will be installed and include Scouler's willow, big - leaf maple, beaked hazel, Sitka spruce, cascara, and thimbleberry (see Planting Plan). Because mulch may float or wash away, biodegradable matting will be used around each plant to reduce competition from reed canarygrass. Buffer Creation Area A 3.45-acre non -credit -generating 40-foot-wide buffer will be created around the outer perimeter of Units A and B to protect the wetland from adjacent roads (Oakesdale Avenue SW, SW 27th Street, and Line Avenue SW) and developments (Seattle Times). The buffer includes existing wetlands and uplands. Native buffer plantings in uplands will include Douglas -fir, big -leaf maple, serviceberry, ocean spray, and snowberry ("Screen Buffer Plantings' on Planting Plan). Native buffer plantings in wetlands will include Oregon ash, red -osier dogwood, Sitka and Pacific willows, and peafruit wild rose ("Wetland Shrub #2" on Planting Plan). Increased Functions from Mitigation Treatments Increases in wetland functions related to the proposed mitigation treatments are described below and summarized in the table of functional attributes for Units A and B. SRINGBROOK_DESIGN OVERVIEW_8-10-05.DOC DESIGN OVERVIEW SPRINGBROOK CREEK WETLAND AND HABITAT MITIGATION BANK Hydrologic: Re-establishing the hydrologic connection between Springbrook Creek and Units A and B will increase functions and processes of the wetland floodplain. Establishing additional woody vegetation and creating micro -topography will increase surface roughness and slow water velocities during flood events and increase residence time of floodwater at the site. These will increase the streams access to available flood storage and may potentially reduce peak flow stream elevation and duration during high -flow events. Supplemental water provided from Units C and D will increase hydrologic inputs to Unit B and potentially extend the hydroperiod in portions in the unit. Water Quality: The addition of micro -topography and dense woody plantings will increase surface roughness increasing residence time of floodwater and favor sediment deposition on the site. The increase in vegetation classes over portions of the site will provide additional biomass to uptake nutrients and toxicants potentially improving water quality function. The increased interaction between Springbrook Creek and Units A and B may allow for water quality improvements in Springbrook. Additions of organic matter (e.g., compost, bark mulch) to portions of Units A and B will also improve water quality functions. Habitat: Replacing reed canarygrass patches with dense native woody vegetation where it is lacking will increase canopy closure overtime. Woody plantings will increase the number of vegetation strata in portions of the site, increase vertical stratification over time, and increase the number of native species present onsite. Recontouring, adding micro -topography, and installing snags and LWD will increase habitat niches. Planting dense woody vegetation in the buffer areas will protect habitat functions from surrounding land uses in the remainder of the site. The site will primarily provide habitat for small mammals, aquatic mammals, amphibians, invertebrates, and birds. Organic matter export functions will be improved by re-establishing hydrologic connectivity between Springbrook Creek and Units A and B. Increased shade provided by riparian plantings could at least maintain or possibly help improve water temperatures and dissolved oxygen, which could benefit fish. SRINGBROOK_DESIGN OVERVIEW_8-10-05.DOC DESIGN OVERVIEW SPRINGBROOK CREEK WETLAND AND HABITAT MITIGATION BANK Unit C Existing Conditions Hydrology: Existing hydrology in Unit C is presumed to be provided by a combination of elevated groundwater and stormwater inputs from a conveyance ditch entering the site from Burlington Northern Santa Fe (BNSF) property to the south. Vegetation: Non-native grasses, common tansy, and Himalayan blackberry currently dominate the wetland re-establishment area. Native trees and shrubs mixed with Himalayan blackberry currently dominate portions of existing wetlands and uplands at the site. Reed canarygrass dominates the areas closest to BNSF Right-of-way. Proposed Mitigation Treatments Mitigation treatments to Unit C include wetland re-establishment, wetland rehabilitation, wetland enhancement, upland habitat enhancement, and buffer creation. Proposed mitigation treatments, acreage, ratios, and credits for Unit C are summarized in Table 5. Table 5. Unit C Proposed Treatments, Acreage, Ratios, and Credits Mitigation Treatments Acreage Ratios Credits Wetland Re -Establishment 10.24 1:1 10.24 Wetland Rehabilitation 3.56 3:1 1.19 Wetland Enhancement 24.21 4:1 6.05 Upland Habitat Enhancement 6.66 5:1 1.33 Buffer Creation 1.63 -- Totals 46.29 18.81 Major Construction Elements • Approximately 10.24 acres of wetland will be re-established by removing approximately 110,000 cubic yards of historic fill from existing uplands and restoring wetland hydrologic conditions and functions. A new conveyance ditch will be constructed through this re-establishment area. [Whether the existing ditch zvill be filled is still being evaluated.] • To provide and increase the source of surface water hydrology to wetlands in Units C, a supplemental water source from Unit D will be diverted via a pipe that drains to an existing conveyance ditch on BNSF property. • To prepare the treatment areas for grading and planting, all plants up to 4 inches in diameter will be selectively cleared and grubbed within areas dominated by reed canarygrass and within the 40-foot buffer area along Oakesdale Avenue SW. The wetland re-establishment area will be fully cleared and grubbed. SRINGBROOK_DESIGN OVERVIEW_8-10-05.DOC DESIGN OVERVIEW SPRINGBROOK CREEK WETLAND AND HABITAT MITIGATION BANK • To increase the plant diversity, structure, and cover of woody plants and reduce competition from reed canarygrass, dense native woody plantings will be installed (3,000 stems/acre). • To improve habitat structure, vertical snags, brush piles, and anchored logs with root wads will be placed throughout Units C with the exception of the buffer. Wetland Re -Establishment Area The 10.24-acre wetland re-establishment area is located in the south-central part of Unit C. This is the second largest treatment area in Unit C. It will include excavating the existing fill areas down to nearly 10 feet, where the bottom of the created wetland will interface with groundwater. This area will include construction of a new conveyance ditch. Treated surface and ground water (X GPM of water during primarily in x months) will also be diverted from the pond at Unit D via an existing conveyance ditch and discharged into the wetland re-establishment area to supplement groundwater. When regional groundwater conditions are typically high (November through March), the surface water discharged from Unit D will flow to the existing culvert under Oakesdale Avenue and then flow through Unit B to Springbrook Creek. When regional groundwater conditions are lower (April through October), surface water discharged from Unit D may infiltrate into the ground. Wetland re-establishment areas will be planted with native trees and shrubs. The wetter bottom area (below the 16-foot contour) will be planted with Oregon ash, red -osier dogwood, Sitka and Pacific willows, and peafruit wild rose ("Wetland Shrub #2" on Planting Plan). Fringe wetland areas (between the 16-foot and 20-foot contours) will be planted with Pacific ninebark, black twinberry, Oregon ash, red alder, Sitka willow, and Nootka rose ("Wetland Shrub #1" on Planting Plan). Woody plants will be installed as live stakes, bare -root, and containers at a density of 3,000 woody sterns per acre to limit opportunities for reed canarygrass recolonization and over time limit dominance of reed canarygrass by restricting the available light. Disturbed soils will also be seeded with a mixture of herbaceous species to compete with reed canarygrass and control erosion. To improve habitat structure, vertical snags, brush piles, and anchored logs with root wads will be placed throughout Units C with the exception of the buffer. Wetland Rehabilitation Area A 3.56-acre wetland rehabilitation area is limited to the northeastern corner of Unit C and is associated with portions of the existing and new conveyance ditch. Supplemental water diverted from Units D could benefit this area in Unit C before it is conveyed offsite. This area is dominated by existing trees and shrubs, which will be protected from clearing, grubbing, and grading. Dense native conifers will be underplanted in these areas and include Sitka spruce, western hemlock, and western red cedar ("Forest Under - Planting" on Planting Plan). Vertical snags, brush piles, and anchored logs with root wads will be placed throughout Units C with the exception of the buffer. Wetland Enhancement Area The 24.21 acres of wetland enhancement will occur at various locations in Unit C. This is the largest treatment area in Unit C. Wetlands will be enhanced in a number of ways. SRINGBROOK_DESIGN OVERVIEW_$-10-05.DOC 9 DESIGN OVERVIEW SPRINGBROOK CREEK WETLAND AND HABITAT MITIGATION BANK Selective clearing and grubbing and herbicide treatment will be used to remove reed canarygrass, Himalayan blackberry, and other invasive, non-native vegetation. Within cleared and grubbed areas, minor grading will also occur to create micro -topography to provide additional habitat niches and hydrologic regimes, which will facilitate the establishment of a diverse plant community. A minimum of 3 inches of bark mulch will be placed in the planting cleared and grubbed areas prior to installing Nootka rose, Pacific ninebark, black twinberry, and Scouler's willow ("Wetland Shrub #3" on Planting Plan). Dense woody plantings of 3,000 stems/acre will limit opportunities for reed canarygrass recolonization and in time limit dominance of reed canarygrass by restricting the availability of light. Woody species appropriate for the various hydroperiods will be planted as live stakes and bare -root as indicated on the planting plans. Disturbed soils will also be seeded with a mixture of herbaceous species to compete with reed canarygrass and control erosion. Areas dominated by existing trees and shrubs will be protected from clearing, grubbing, and grading. Native conifers will be underplanted in these areas with 70 trees per acre and include Sitka spruce, western hemlock, and western red cedar ("Forest Under - Planting" on Planting Plan). Vertical snags, brush piles, and anchored logs with root wads will be placed throughout Units C with the exception of the buffer. Upland Habitat Enhancement Area The 6.66 acres of upland habitat enhancement will occur at various locations in the northern and western portions of Unit C. Selective clearing and grubbing will be used to remove invasive, non-native vegetation. Dense native trees and shrubs will be planted in these areas and include Douglas -fir, tall Oregon grape, serviceberry, snowberry, and red elderberry ("Upland Habitat Planting" on Planting Plan). Buffer Creation Area A 1.63-acre non -credit -generating 40-foot-wide buffer will be created to protect the wetland from Oakesdale Avenue SW and development to the south. The buffer includes existing wetlands and uplands. Native woody plantings will be installed and include Douglas -fir, big -leaf maple, serviceberry, ocean spray, and snowberry ("Screen Buffer Plantings" on Planting Plan). Buffer plantings in uplands will include Douglas -fir, big - leaf maple, serviceberry, ocean spray, and snowberry. Buffer plantings in wetlands will include Oregon ash, red -osier dogwood, Sitka and Pacific willows, and peafruit wild rose. Increased Functions from Mitigation Treatments Increases in wetland functions related to the proposed mitigation treatments are described below and summarized in the table of functional attributes for Unit C. Hydrologic: Removal of fill material in the wetland re-establishment area will increase flood storage capacity. Planting dense woody vegetation will increase surface roughness and decrease water velocities reducing potential erosion and desynchronizing surface waters flowing to Unit B and eventually into Springbrook Creek. More diverse micro - topography will create a greater variety of hydrologic regimes. SRINGBROOK_DESIGN OVERVIEW_8-10-05.DOC 10 DESIGN OVERVIEW SPRINGBROOK CREEK WETLAND AND HABITAT MITIGATION BANK Water Quality: Woody plantings will increase surface roughness slowing water velocity and increasing water retention time, allowing sediment to be retained and nutrient and toxicant uptake into vegetation and soils. The wetland re-establishment area will provide soil saturation for extended periods, allowing the uptake of dissolved nutrients and toxicants. Increasing the number of vegetation classes throughout Unit C will increase site biomass allowing greater uptake of nutrients and toxicants. Habitat: Reestablishment of additional wetland area will increase the amount of wetland habitat type. Increased flood frequency onsite and diverse micro -topography will create a variety of hydrologic regimes and potentially vegetation communities. Woody vegetation and habitat structures, such as vertical snags, brush piles, logs, and root wads, will provide vertical habitat stratification that further increases the quantity of habitat niches. The site will primarily provide habitat for small mammals, aquatic mammals, amphibians, invertebrates, and birds. Woody plantings will increase canopy closure, the number of vegetation strata, and provide additional buffering from adjacent land uses. SRINGBROOK_DESIGN OVERVIEW_8-10-05.DOC DESIGN OVERVIEW SPRINGBROOK CREEK WETLAND AND HABITAT MITIGATION BANK Unit D Existing Conditions Hydrology: A shallow ponded area occurs on the northern part of Unit D. The ponded area and the forested wetland appear to be supported by seasonally high groundwater and surface water connections from other wetland areas west of the BNSF mainline. A culvert connects the wetland area west of the track to the ponded area, and the entire site discharges to the north, via a culvert under an existing BNSF rail line and via less than 2,000 feet of existing conveyance ditch to Unit C. Existing: Existing wetlands onsite are dominated by native trees and shrubs with patches of Himalayan blackberry. Proposed Mitigation Treatments Mitigation treatments to Unit D include wetland re-establishment, wetland rehabilitation, and wetland enhancement. Proposed mitigation treatments, acreage, ratios, and credits for Unit D are summarized in Table 6. Associated with but not included in Unit D is an existing City of Tukwila wetland mitigation site that was recently developed to compensate for wetland impacts related to the 180th Street/BNSF grade separation project. The wetland that was constructed on the southern half of the parcel relies on groundwater for wetland hydrology, and it will have no surface water connection to the activities proposed as part of the Springbrook Bank. Table 6. Unit D Proposed Treatments, Acreage, Ratios, and Credits Mitigation Treatments Acreage Ratios Credits Wetland Rehabilitation 2.63 3:1 0.88 Wetland Enhancement 2.97 4:1 0.74 Totals 5.60 1.62 Major Construction Elements • To supplement hydrology in Unit C, water will be diverted to the ponded area at the north end of Unit D via a new pipe, which will carry all treated water that now flows directly to Springbrook Creek. The pipe will be buried in the existing roadbed and the area restored. A small amount of wetland (approximately 0.25 ac) will be temporarily disturbed to construct the new pipeline to the ponded area in Unit D. No modifications to the existing culvert under the rail line are expected. Native woody planting will be underplanted in the drier portions of wetlands on the site. Water collected at the 180th Street grade separation project is currently pumped to a water quality treatment and detention pond before it is discharged to the existing storm sewer, which drains to Springbrook Creek downstream of SW 41st Street. Instead, this • To improve habitat structure, brush piles will be placed throughout the wetland enhancement area in Units D. SRINGBROOK_DESIGN OVERVIEW_8-10-05.DOC 12 DESIGN OVERVIEW SPRINGBROOK CREEK WETLAND AND HABITAT MITIGATION BANK Wetland Rehabilitation Area A 2.63-acre wetland rehabilitation area is located at the north end of Unit D. Hydrology in will be augmented with flows (X GPM of water during primarily in x months) to the ponded area at the north end of Unit D. Inundation depths will not change, because these are determined by the elevation of the discharge culvert. Wetland hydroperiods may be lengthened slightly longer into the growing season, but will continue to infiltrate and recharge groundwater later in the summer. No planting will be installed in the wetland rehabilitation area. Wetland Enhancement Area A 2.97-acre wetland enhancement area is located in the middle of Unit D. Clearing, grubbing, and grading will be limited to approximately a 0.25-acre wetland area needed to construct the new storm sewer. All other existing trees and shrubs will be undisturbed. Native conifer will be installed in the understory and include Himalayan blackberry will be removed from the understory of the existing forested wetlands. Native conifer trees will be underplanted with 70 trees per acre and include Sitka spruce, western hemlock, and western red cedar ("Forest Under -Planting" on Planting Plan). The 0.25-acre area disturbed in constructing the storm sewer will be planted with native trees and shrubs and include Pacific ninebark, black twinberry, Oregon ash, red alder, Sitka willow, and Nootka rose ("Wetland Shrub #1" on Planting Plan). Increased Functions from Mitigation Treatments Increases in wetland functions related to the proposed mitigation treatments are described below and summarized in the table of functional attributes for Unit D. Hydrologic: The hydroperiod of wetlands in Unit D may be extended by supplementing hydrologic inputs from the 180th Street grade separation project. Water Quality: Water quality functions will be improved through retaining sediment and the uptake of dissolved nutrients and toxicants by vegetation and soils. Supplementing wetland hydrology will provide soil saturation for extended periods, allowing the uptake of dissolved nutrients and toxicants. Habitat: Underplanting will increase habitat complexity in wetland enhancement areas by adding additional vegetation strata and native species. Supplementing wetland hydrology may create additional hydrologic regimes. Woody vegetation and habitat structures, such as brush piles, will increase the quantity and quality of habitat niches. SRINGBROOK DESIGN OVERVIEW 8-10-05.DOC 13 DESIGN OVERVIEW SPRINGBROOK CREEK WETLAND AND HABITAT MITIGATION BANK Unit E Existing Conditions Hydrology: No wetland hydrology currently exists at Unit E. Former wetlands at Unit E have been covered with fill. Vegetation: Portions of the site are dominated by black cottonwood stands. Large portions of the site have been severely impacted by off -road vehicle use and are dominated by non-native grasses, common tansy, and Himalayan blackberry. Proposed Mitigation Treatments Mitigation treatments to Unit E include wetland re-establishment, riparian enhancement, upland habitat enhancement, and buffer creation. Proposed mitigation treatments, acreage, ratios, and credits for Unit C are summarized in Table 7. Table 7. Unit E Proposed Treatments, Acreage, Ratios, and Credits Mitigation Treatments Acreage Ratios Credits Wetland Re -Establishment 7.97 1:1 7.97 Riparian Enhancement 2.50 &_'i 0.50 Upland Habitat Enhancement 2.64 5:1 0.53 Buffer Creation 2.11 -- -- Totals 15.21 8.99 Major Construction Elements • To connect 8 acres of re-established wetlands in Unit E to Springbrook Creek, approximately 152,000 cubic yards of historic fill will be excavated in Unit E. Hydrology will be provided to the wetland re-establishment area from groundwater and from over -bank flooding of Springbrook Creek. • To prepare the treatment areas for grading and planting, all plants up to 4 inches in diameter will be selectively cleared and grubbed within areas dominated by reed canarygrass and within the 40-foot buffer area along Oakesdale Avenue SW. The wetland re-establishment area will be fully cleared and grubbed. • To increase the plant diversity, structure, and cover of woody plants and reduce competition from reed canarygrass, dense native woody plantings will be installed (3,000 stems/acre). Existing trees not removed will be underplanted with late - successional conifer species. • To improve habitat structure, vertical snags, brush piles, and anchored logs with root wads will be placed throughout Units E with the exception of the buffer. Wetland Re -Establishment Area The 7.97-acre wetland re-establishment area includes creating riverine flow -through conditions at Unit E. In addition to excavating significant portions of the site to a depth of 10 feet, three sections of the berm would also be removed to connect Unit E to SRINGBROOK_DESIGN OVERVIEW_8-10-05.DOC 14 DESIGN OVERVIEW SPRINGBROOK CREEK WETLAND AND HABITAT MITIGATION BANK Springbrook Creek. The location and size of the breaches was based on the results of the hydrologic model of Springbrook Creek. This is the largest treatment area in Unit E. The HSPF model developed for Springbrook Creek was used to estimate water depths and duration of inundation within the proposed excavation in Unit E. The Washington Department of Fish and Wildlife (WDFW) stipulated that streamside wetlands could not potentially strand fish that may use available habitat and thus low -flow connecting channels are incorporated into the design. The remainder of the site has been designed to be seasonally -inundated to an average depth of 1 foot. Portions of the wetland will be 1 foot higher than the target elevation and portions will be set 6-inches lower. This variation will allow for separate planting areas and distinct wetland plant communities. Wetland re-establishment areas will be planted with native trees and shrubs. The wetter bottom area (below the 9-foot contour) will be planted with Oregon ash, red -osier dogwood, Sitka and Pacific willows, and peafruit wild rose ("Wetland Shrub #2" on Planting Plan). Fringe wetland areas (between the 9- and 12-foot contours) will be planted with Pacific ninebark, black twinberry, Oregon ash, red alder, Sitka willow, and Nootka rose ("Wetland Shrub #1" on Planting Plan). Woody plants will be installed as live stakes, bare -root, and containers at a density of 3,000 woody stems per acre to limit opportunities for reed canarygrass recolonization and over time limit dominance of reed canarygrass by restricting the available light. Disturbed soils will also be seeded with a mixture of herbaceous species to compete with reed canarygrass and control erosion. To improve habitat structure, vertical snags, brush piles, and anchored logs with root wads will be placed throughout Units E with the exception of the buffer. Riparian Enhancement Area The 2.50-acre riparian enhancement area includes the remaining sections (islands and peninsulas) of the berm next to Springbrook Creek. Existing trees will be protected. Selective clearing and grubbing and herbicide treatment will be used to remove Himalayan blackberry and other invasive, non-native vegetation. Native woody plantings will be installed and include Douglas -fir lodgepole pine, serviceberry, oceanspray, and snowberry ("Riparian Plantings' on Planting Plan). To improve habitat structure, vertical snags, brush piles, and anchored logs with root wads will be placed throughout Units E with the exception of the buffer. Upland Habitat Enhancement Area The 2.64 acres of upland habitat enhancement will occur at various locations in the northern and western portions of Unit E. A portion of the existing cottonwood stand will be protected. Selective clearing and grubbing will be used to remove blackberry and other invasive, non-native vegetation. Native trees and shrubs will be planted in these areas and include Douglas -fir, tall Oregon grape, serviceberry, snowberry, and red elderberry ("Upland Habitat Planting" on Planting Plan). To improve habitat structure, vertical snags, brush piles, and anchored logs with root wads will be placed throughout Units E with the exception of the buffer. SRINGBROOK_DESIGN OVERVIEW_8-10-05.DOC 15 DESIGN OVERVIEW SPRINGBROOK CREEK WETLAND AND HABITAT MITIGATION BANK Buffer Creation Area A 2.11-acre non -credit -generating 40-foot-wide buffer will be created to protect the wetland from Oakesdale Avenue SW and development to the north. The buffer only includes existing uplands. Native woody plantings will be installed and include Douglas -fir, big -leaf maple, serviceberry, ocean spray, and snowberry ("Screen Buffer Plantings" on Planting Plan). Buffer plantings in uplands will include Douglas -fir, big - leaf maple, serviceberry, ocean spray, and snowberry. Buffer plantings in wetlands will include Oregon ash, red -osier dogwood, Sitka and Pacific willows, and peafruit wild rose. Increased Functions from Mitigation Treatments Increases in wetland functions related to the proposed mitigation treatments are described below and summarized in the table of functional attributes for Unit E. Wetlands will be restored from existing upland areas at Unit E. This upland area currently provides minimal habitat, hydrologic, or water quality functions. The proposed wetland re-establishment area will flood in most years, providing substantial increases in hydrologic, water quality, and habitat functions not currently provided at the existing site. Hydrologic: Re-establishing the hydrologic connection between Springbrook Creek and Unit E will increase functions and processes of the wetland floodplain. Establishing woody vegetation and creating micro -topography will increase surface roughness and slow water velocities during flood events and increase residence time of floodwater at the site. The result will be to increase the streams access to available flood storage and may potentially reduce the elevation and duration of peak flows in Springbrook Creek. Water Quality: Establishing dense woody vegetation will slow water velocity and encourage sediment deposition and toxicant/nutrient uptake by both vegetation and soils. The re-established wetland hydrology will provide soil saturation for extended periods, allowing the uptake of dissolved nutrients and toxicants. Dense woody vegetation will use nutrients in solution for biomass production. Increasing the ratio of the wetland to stream width will increase the likelihood of substantial water quality improvement. Habitat: Establishing dense woody vegetation will increase canopy closure, the number of vegetation strata, and provide buffering from surrounding land uses. Woody vegetation and the installation of snags and LWD will increase habitat complexity and the quantity and quality of habitat niches. Increased flood frequency and diverse micro - topography will create a variety of hydrologic regimes. References Celedonia, M. 2002. Benchmarks for Stand Development of Forested and Scrub -shrub Plant Communities at Wetland Mitigation Sites in the Lowlands of Western Washington. Washington State Department of Transportation, Olympia, WA. hgp:/ / www.wsdot.wa.gov/ eesc/ design/roadside/pdf /mitil ationbenchmark.pdf SRINGBROOK_DESIGN OVERVIEW_8-10.05.DOC 16 0 3 N L c.> w d R d O V O U m N_ N '� C W tD OOOOO O T O) O n aD u) V ID V OO V OOO CD O NO CO M N u) M O O _ O O) N N lO D) N N(O to oD N O> OO N N 7 u) M N N 10 (D V V 10 ^ (D N M V 0 M M 0 0 V aD OD CO O O M M O N W CD V N d ? W 10 � N N 00 Q W N 1n O W �O LO to ao aD U) U0 N LO W U� to 7 V CO CO LO l0 R C CO CO l0 LO ID 10 CD CO O CD CO CO co co O O) 00 co M (D O O O M N O N N N N t V CO [O V 7 V V W OD C V (O a aU m v v v v � v a v v v v v N N v v v m OO 0 0 00 00 0 0 N 0 00 N OO 0 00000 o 0 0 o 0 0 OOOOOO 0 0 0 0 OOOOOOOO 0 0 0 000OOOO m Q " It 0 O` 0 N .- a0 oD O C o N .- O O r O N N N f� M n N M. Oco M .m �, m m m m C.2 H ut C ° Lucm = E C c C y O O j N h G E N ' m G E N ,O 'm N° QI .G w 'mo U° t N G m c°.i m .m m �' r of tm N y J k a a m O a co 3 o a m a a a a L m a CcUoD a ¢U Q.t3O)? n m '° u 2L vl m, o .3. o 3N 2 cUL o c,- m O U O c yUm "m0wamnz 0a�ia m o m zamw o o o (n o mmc U)(U(nNO CL �n2 � 0 a E ❑ Under Separate Cover via the following items: ❑ REPRODUCABLE PLANS ❑ SPECIFICATIONS ❑ ORIGINALS �Y PLANNING/BUILDING/PUBLIC WORKS DEPARTMENT Renton City Hall 1055 South Grady Way, Renton, WA 98055 ❑ UTILITY SYSTEMS DIVISION 425.430 7234 Fax: 425.430.7241 ❑ TRANSPORTATION SYSTEMS DIVISION 425.430.7321 Fax: 425.430.7376 TO: iharoo DATE: 14 , , I " JOB NO. ,e RE: '5 bid,k-e, -c i 4 1-1 , I O r I I G a'n ' r' P fi WE ARE SENDING YOU ❑ ATTACHED ❑ SHOP DRAWING ❑ PRINTS ❑ COPY OF LETTER ❑ COPIES z MESSAGE: These are transmitted as checked below: ❑ FOR SIGNATURE APPROVAL ❑ APPROVED AS SUBMITTED FOR YOUR USE ❑ APPROVED AS NOTED AS REQUESTED ❑ RETURNED FOR CORRECTIONS ❑ FOR REVIEW AND COMMENT ❑ Copies to: From: ❑ RESUBMIT COPIES FOR APPROVAL ❑ SUBMIT COPIES FOR DISTRIBUTION ❑ RETURN CORRECTED PRINTS ❑ PRINTS RETURNED AFTER LOAN TO US IF ENCLOSURES ARE NOT AS NOTED, PLEASE NOTIFY US AT ONCE. PBPW5001 09/99 bh Ir CITY OF TUKWILA EJ I H- LEGEND EXISTING TRAIL—,,, I EXISTING EXISTING WETLAND WETLAND MITIGATION MITIGATION SW 27TH ST. EX STING CULVERT ,tea CONNECTION BETWEEN r`Ti3V110Ai11N111b1011101, lNe;►SN�161A ? .tom%3ii�r t'f0111e1!•eeaeeeseeese•s� �7Sr. Ff,OfRAL RESfRYE BANX UNIT C AND UNIT Bi tO1•1vii0v1o1v?•OiAalvOt1v1t1t1a1t1ter1i1t1t1a1t1t4t� 7i•ttc tsaiTt•••.`v•o•vvt•t� 11a!!eul11111l►1A1w111b1 :•1T1t1•4o0�1T1v1i1tOt1►� .1,` � r �eti�wt•trr ,; �tit!•itit/tilt!/lriisLritstO�ait!•iti�A� •1slieel�ae�. •tw.tot••ear.tttttwt• JIV•N•v►�ittit/fiv►�o�tvvtr`tIt19•.4•t•V 111N11.11el411011w1111111♦ Irtlt••IHvvtv••vv1vH•vtt� r " � N1e111f10'e1v1l11e11A/ •ledlsl.sll f� ji . •ttittt�ttwttllittt• tlrt7lt•lvvo�r ,f i�1e11l11re0�leAla!!01 ���•irtt`iir1r41tvr•♦ �l1A1•J11111l111NIe1MINett f1iv11.vv°ltttrivr•iitivi 1111lS110l�111111leNl111!! S101A0l11N1� ;f• _3TCo•9�•T'T'i-=�►1 e11l111e11e111e11e� 1.0111t11'G11�r �.•1. .ttvtltlttrl•v1t.r EXISTING WETLAND �ittvtrvaii9vtiayvMovtafty+ 11l11l111e11l111l11e110601A0 •/at•TVt•Tty" ♦Th�\t1ll1fe1101Ne11e1 ♦11�.11t.110�,rD� �.a11e �' UNIT CtV.attrttttttP•ri►.ttttit•t Ie1Nl1N111/110lNe1!l111e1 ' N►tttttflittiviNlllTttiPl:i w N•tIt••T �I----t0►1tOtatOt/t��i li�i f �1yiT1tl1•��l/e11e11Ce1isenit4 T09tr1►t0ttl�;f r4t."i\�Ilrlrl«1vit1T1•1•ltAse•1T1ltl MNIYI SillfelA..lNe11!!1le1NlMe! 'taTartt4tratt9tlr•t�r•t�t �t .1a0110011011'{I e1��0•�r.11vts.4rter/rt• ti' IM•lftr►H►" Jrfr1! ►elver ••••+••!� •'111l11 �. 11ANe1N11fe11l1l1e110�11l/: ' f1•i•t►itttttltlittrvV► Ne1.elfsl1fe11l111e1/A111en .e06A1000001/ ItITi -i t►tHT 01►tlrlr/tOtl.A•s?1t1T�tOt�Tltlal ►9tiV••`••M 1 r •t•er•tottet„rrtt 11A100l�1GIU�r c•♦11N1., ,'..�.r..•,. - .__ •_ ...tee•... u4.wp` .,....•.. '1:1 �. �.).\ ._,... _ ' • ¢••'+'+ a Via:_ _ '"� _. __ ♦arttltrrtt••TI•telrltwi��t'i t1e111111111e11s1b11N1! ':, Nt•tvlt lveltstt/Trra•I,v 1.l1Ye11!!1le11.e1100il1.l0 .. �•ife)ee•eeeee••�el.•e•1•e!•1 � •r•Irt1•tIt'� ; � �?1t1�1r1T1 � ►elleusAll_e11i �! �13.1i1y01/� ►� �-0►l��w!•0•1i1�0�1•lOA 1�� ' *l►1•1v1t1'�� ►lte"'w"" z"A •e• .. I,. •wee.. �.....w♦ T anun ♦w.... CITY OF RENTON • 1 r' ..i -�� Y PROPOSED TRAIL W W —EXISTING SPRINGBROOK TRAIL'- 00[CATTLE TIMES IrDEYEL L7PA(ENT DO Z �T o11rM ! < 'w W' SW 39rH ST. _.,---•'-1-•'--'�--� `I •I . T I� t / sW 41sr sr. l�- EXISTING 7" WETLAND MITIGATION tRENTON).J SEATTLE TINES DEYEL OPNENT EXISTING WETLAND MITIGATION SW 34TH ST. EXISTING WETLAND MITIGATION �2v r T 12" DIP �� T--- EXISTING i Y WETLAND MITIGATION (TUKWILA) SW 43RD ST. CITY OF KENT SPRINGBROOK CREEK WETLAND AND HABITAT MITIGATION BANK : SUMMARY CONCEPT MAP OVOUO PROPOSED INDEX CONTOUR 00000 WETLAND ENHANCEMENT RIPARIAN ENHANCEMENT PROPOSED INTERNEOIATE CONTOUR EXISTING INDEX CONTOUR EXISTING INTERMEDIATE CONTOUR UPLAND HABITAT ENHANCEMENT CITY LIMITS RAILROAD TRACK M EXISTING WETLANDS -•'-•'-•'- PROPOSED STORM SEWER EXISTING TRAIL BUFFER FROM PARCEL BOUNDARY �— PROPOSED CONVEYANCE DITCH . - _ _ PROPOSED TRAIL El WETLANO RE-ESTABLISHMENT PARCEL BOUNDARY AREA TO BE CLEARED 0 GRUBBED ® BUFFER FROM TRAIL EXISTING STORM SEWER - > EXISTING CONVEYANCE DITCH RmWETLAND REHABILITATION OAKESDALE AVE. SW A-M . :,. EXISTING WETLAND MITIGATIONAR-ENTON) At IE -SPR I WGBROOK CREEK ti 10 4 m X loo % 40 ti z If % z CD % op .0.010 0 C) 0 LIN 0 co 0 4 O�, Tk [s— — —ST— —ST— —ST c: LIND AVE. SW AWL z I i •\ r 7 9 F 777, F1 Lh-1-1 0 ] LLJ > Lno j r) > n rn m Ln rn 'o CD 'o CD mZI AZ M r.,c m n -0 n -v 0 m,wom 90 M 0 > > T . z " 0 z 0 m m z 0 31C w > m z M Ln Z� LA - Mu - -v < Ln -0 m ZA r) > r- m r- tA 0 > 3. - m ;o M 0 X) m M m z ED OM-0- 0 000 w n — _ z Z c: x � C �� cx0co CO M > 00 > z rLAn z rn z CD z ;o m C.) m A w m rn ;o rn z 0 0 0 0 co CO x co c') 0 0 9. r m 0 ;o 0 m rn z m31C M m m c 0 0 a 0 Z x z x - 0 m C) 0 C) x - m 0 m M 0 :1) > 3- 0 x rm rn m 0 CD x w ;o z M D x x cl) r') <-< z m x --4 0 Ln 4 404 ----------- OAKESDALE AVE. SW LA C) C') V-14 m 1 :2 o 0 ti m z it Ah: IK B. N. S. F. R. R. MONO Mom ------- OAKESDALE AVE. SW r771 [] r7--M rF LLLJ CD a Ic = t rn rn m -D-0 M c m m rn m m 0 n � 00 > Ln r n -D m a r r r CA 0 (A -v -D m ti M 0 m z z ! ::! 00 0 0 m 0 z z z 0 Ln 0 b. rn 0 0 0 z z z m m m C, 0 OD 0 m 2: C') C) C') 00 m 1. rn m z w M M - n a0 n0 z m T 0 0 m z m x x r) z )- 0 z s s m 0 a < -v a z rn m m m m > r) :1) x ;D x > K K m rn r a z x x ;D a a n m x CD 0 m n m r) m z z m z M (A 0 z 0 0 n- xz Z m m > LA q. CD z x x C3 0 0 0 0 r) 0 m na m z m z x z 0 0 m C) 0 cu x x a z z w m 0 0 :D SlIM11 A113 1N311 °0 511111 l Am viinim / / I�1 �3�°xxan .is3N sn,r I '15 O2i£6 MS / / '1S H10B1 JW- �a 3 1,131-- 1 /� \\ NljHN31 " 0 ( =iNl d3dJ 21 31 o .. ic Z i At4*,hkl pB ,, i D r DOS+ ' I D O � , D f m Ell c InLA \ \ l r 71 or, co V, n d m m 0 \ \ I € 441 r{ld r 6NSF I y',� I c o z m LA P n vl .J 1 o D m n m m v v = c m m m I s m m m O 1 s 1/1 < N r (A n r r u+ to to m y .7J y m O s s zz — •-• — o z — z 3-z r, v v zi zi m 0 z c) v Cl)cocc v m Z 1 CD n -+ to c v+ z m = -- A z x m z 2 n s z D O O O D s mm I r < m s z z m m r m A Z T7 Z f1 s m x m r z x m z r+ m m -a CA v= v m m m z+ sa 1 ✓a d v o me z M R. M o C n m I� N C Aix ptdk 41. ��'. •_ _ :ssx. - .r. a..:.:>'..; ,. ...,RYA. _,....�:..�.r.'•.�ii.Yw*s.•..,�.yzK..w.i.n.�..,✓i „_ w`"wr+e7b OAKESDALE AVE. SW ML idi I Y % r a• , N�l {�, X ♦ 7 Z n C) W C) r W a 1 1 1� �,• C�` e r "wryry ♦ o .. ei!^• ,►r s m m 'a -0 ca .. c z t m m v -0 x a a x c v m 00 'U mm -, m 0 rn z z = - 0 C3 Ci o z D r m p 0 a o z z m m fTi �+ 0 o m o „ x z x 00 00 CD m m a a o i ; + x m -0 s r x i p s z" i x 3 '• + ' m y n m m O m c"> m Cl) "� +� mo nrn x m of oz m a z in a a Z {� + CD I A 0 0 r a * 1 !^ c c F CITY OF RENTON .Jl Kathy Keolker-Wheeler, Mayor March 7, 2005 Bruce Dibert WSDOT I-405 Project Team Engineering Services Manager WSDOT 600 108th Ave. NE, Suite 405 Bellevue, WA 98004 , Planning/Building/PublicWorks Department Gregg Zimmerman P.E., Administrator SUBJECT: CITY UTILITIES WITHIN THE SPRINGBROOK CREEK WETLAND AND HABITAT BANK Dear Mr. Dibert: Enclosed please find the schematic diagrams of the water, sewer, and storm systems in the vicinity of the wetland mitigation bank sites. The bank sites have been highlighted in blue for easy identification. Please keep in mind these are schematic and locations are very general. To determine if a particular utility is within the boundary of the bank sites, research of record drawings would be required. Please contact me at 425-430-7247 if I can be of further assistance with this matter Sincerely, Allen Qu , Project Manager Surface ate Utility Enclosures HAFile Sys\SWP - Surface Water Projects\SWP-27 - Surface Water Projects (C1P)\27-3170 Springbrook Creek Wetland and Habitat Bank\1003City Correspondence\Utilities.doc\AQ\tb R E N T O N 1055 South Grady Way - Renton, Washington 98055 ® This paper contains 50% recycled material, 30 % post consumer AHEAD OF THE CURVE 3 I 'N 'H O m O .8 A .e �l MS a^V PU!l O O O O 3 xaaiD X jg3t udt I s m N b N W W n - • v 3 cD QD w a s '8 a .8 51 s� ' 0 Dr W Sl$ F v ---------------- - Ld z ba 'd 'N - fl I 'N 'S Z ,8 0£ 62 'a c TS LE S£ Cb 908 COB IE � g 9 LE 9£ zE 8E LOB 8 ,0 208 £E L z 91 TOT co 201 lul,oI t>• 4T EI zi TI y - 66 VA o I - -N fi - - HLI-W8i21 SI-8I21 408 - Sz Lz �3; 488 MS V8 K-81d ,8 w .8 3 zz CI-81d £z 1•z M -- - - CD -N8 iz OOI - - 9i TI ST 4i tii-d8 8 _ - z1-8 a I ,8 �S IS18 MS '8 TI Oi � £I m c 6 OD ',I-d8I21 -tl8R1 - 0 $ any ,I -A 1::J {, a N ISTL S aAV PU2L 12 - 36 T23N RO E 3 NqDd jaAOPuy G2 • 24 T23N RO E 1/2 47 O i� C-4 4 6 �1 D E T. #1--------! i • 2 r, _4747 47 1 lzV #24 \ 4744 4746 � i 47* 66 4749 10» ! l! » 4 if„ 46 47M 3es1 10 • e4 1 47e3 •3e60 3w I ! 12" 8" 47e2 _ o 0 3061 • 3e37 • �' �- • 3es4 • f ! �3m 3 W 27t St 3ee72 1» I 1234�s • 3eu "'" fie 4 4764 • 3e66 3e6e „ 273�{ i 1 i V o V O =4 wn N I a>9b IW I 13 SAt A NI e3:6 N W � N � W Sift. G S 30 w z w 196' Z � 10" 12" � N N3M 414 C,7 0 • 8 SW 94th SU o SW 34tf • t2 " 20 3M 13 to 174+M 23 00 • Je71 14121 1e - 47e7 12„ 17 4 M 12 1e 24 22 4 12" 123 O O _ y N O r 3M=4 3ee4 3 w 3ee2 1 0 3916 J915 12" - ' d 10 v� 11 10 _ 4 10 CM 4 8„ , 10" • • 0 3M 3M S'; TL E N 3e93 401 '— 39te 2 3ee6# 304 3N5 4070 e M 3e9a N 3912 ��'' '�� • 3924 _ 3e99 3e� AN S 3 9 t 00 ,oe4 40Qe 00 4 , 3921 3M =3 12"e J900 N • 12" 47041 0 �Q'- » 1220 12 r 5m 12 4194 41•e2 4 44e1 47760 3103 301 4 1a • 5044 4479 3M 39oe � 10 • D O �� 4249 N 1 x 4229 " G2 - 24 T23N ME E 1/2 E 1/2 Q 200 4Q0 2 Gti�Y �� VALVES WATER VALV S 1:4800 i i risrnw Tsci cam, sERvicEs 25 T23N RO E 1/2 o unsio2 4325 C 'l - 19 T23N ME E 1/2 W 1/2 .41 43 �o N 44 po LA Ci! C=i N t=i C cN G N G3 - 19 T23N R5E E 1/2 W 1/2 W 1/2 24° 400 Y H3 �„ � WATER VALVES 1:4800 �� PB/PW TBCiiMCAL 3ERVICEs 11/15/02 30 T23N ME W 1/2 O 5330 SIM �w. dh. 46 sow 01. d6. d6 Ob 06 06 Ao+ A A A A A f A I Cascade � d Co Co 72nd Ave S � GREEN R � � • .ZZ M N CDO ., N � � • o � • W ry •C z 0 Cho 12' r'rJ �- 2� 12" �-... N N ---1'------------------- - - aflu NEZI SZ . ZH 'I11111II1111 H2 • 25 T23N RU E 1/2 E 1/2 E 1/2 1 12' �' • • o u CAD 12' • 1 h• m G2 - 24 T23N ME E 1/2 12 - 36 T23N ME E 1/2 1`tY O A Storm System P/B/Pw TECHNICAL. SERVICES U"02 Q 220 400 1:4800 H2 25 T23N ME E 1/2 4325 G3 - 19 T23N ME W 1/2 SW 23rd St — 26 `` J'I,S �1�._._-.. -:.J 1,,• � � e6•D�8 , . � _ _.. - � 26f3-17 1 I � _ I 26F3-12 11 (/ t6 W e6f3-7 26F3- a6F3-m 111 e6,F3-9 j I 26,L4- e6,C4-3 M 4-7 � ,� E6,D4-3 e6,E4-5, e6 4-4 26,Eh1 e6.EMe ------- efi 26,D43 vw lh St I e6 4-3 � 4-12 .. I I , e6f4-4 I I 1, 1 I I I 26,D4- ' I I e6f4-6 • j S' r 26F4-3 L-6 f4-0 26F4-9 1 �T e6F4-11 '.. SW � thSt. - 26f4-e- e6f4-10 4 6 1. ;.._.. �. I 1 CJ. I 96AZ-4 FMI_----_---_— w i i 26,E4-0 ES- 26.F5-5 w 11 ------- 26,E5- 2695-6 1 SFr+ � N Z M I SW 30th st e6f6-.3- ecm- I I I _ 7 e6fs-e W z 26f5-1 17� e6F" -- Vl 9 > e6f6-7 a J i I j lI 26F6-4 f6-3 iI I l i j e6,D6-e 26f6-2 e6F6-1 4 26.D6-5 6-1 26,E6-3 7- I 96.D7-4 e6,E7-7 e6.E7-4 26,D7-5 e6,D7-6 e6 E7-3 - — 7 ---------------- e6L7-6 26,D7-17 e6,E7-11 / 26.E7-9 ,E7 a e6 7 2647- D7 l � \, 26f7-1 e6,E0-3 � ce-u e6.Ee-e c 'B, N. CB-7 AO-3 , I _ -- ---- 13 - 31 T23N ME W 1/2 2 ° 4 ° °g G;, Y Storm System 1'48°° H3 + � PB/PW TECHNICAL SERVICES 30 T23N ME W 1/2 5330 / u-) . 2 K T7 -AN RAF, W 1/2 Y O e Storm System � ' P/B/PW TECHNICAL SERVICES to 11M/02 Q 200 4Q0 1:4800 36 T23N ME 12 w ii2 433( CITY OF TUKWILA I c 30 jr I f j M BNSF CITY OF RENTON SW 34TH ST. OTHER YIETLANO MITIGATION EXISTING TRAILI T�? • ` y 1 '�' e � ..1 d A ka . T B. UNIT UNITE w � 1 w ✓.: '.4�'<�... / SW 39TH ST. 0 EXISTING R.R. SPUR :.. UNIT D 1111'C AI C GIICIAIFCC SW 41ST ST. / CITY OF KENT a 1 LPROPOSEO TRAIL I' LINKAGE ALONG CREEK I ,.—EXISTING TRAIL TE,4 7,Q f T!ACS OEI/£L OPACN r •�-•�_.i-_.,--..__"__••___"__"__"__'•_"•_ter _.�-.► n -u i z i T y ' � 1 f t SPRINGBROOK CREEK WETLAND AND HABITAT MITIGATION BANK : SUMMARY CONCEPT MAP LEGEND PROPOSED INDEX CONTOUR PROPOSED INTERMEDIATE CONTOUR EXISTING INDEX CONTOUR EXISTING INTERMEDIATE CONTOUR _ ' EXISTING WETLANDS WETLAND REHABILITATION x x WETLAND RESTORATION LjMETLAND ENHANCEMENT yM UPLAND HABITAT ENHANCEMENT BUFFER FROM PARCEL BOUNDARY ® RIPARIAN ENHANCEMENT PROPOSED STORM SEVER —�- SWALE PARCEL BOUNDARY EXISTING STORM SEWER RAILROAD TRACK EXISTING TRAIL - - - PROPOSED TRAIL i EXISTING CONVEYANCE DITCH CITY OF TUKWILA SW 2TTH ST. FEO£RAL RESERVE BANK i i SOUTH BOEING MARSH UNIT C 41 1 i .. i CITY i OF RENTON 1 SNSF t ' T , _. UNIT E 1 i� • i� I EXISTING R.R. SPUR UNIT D '/ ftAY CCf1Al F RIIC7NG"GG 0 PROPOSED TRAIL LAl Y . LINKAGE ALONG CREEK p WEXISTING TRAIL GEATTL E TlAIE S OEVEL OPA/ENT m r, Z Z 0.. EXISTING TRAIL 1.1 Yor UNIT B. �}�' ►�� UNIT A► by f OAKESDALE MITIGATION A SEA TTL E TIMES OEVEL OPWNT SEATTLE TIMES MITIGATION SW 34TH ST. SW 4LST ST. - / T - T T ! A II =T CITY OF KENT SPRINGBROOK CREEK WETLAND AND HA1511-AI MITIGATION BANK : SUMMARY CONCEPT MAP LEGEND PROPOSED INDEX CONTOUR WETLAND ENHANCEMENT PROPOSED STORM SEWER PROPOSED INTERMEDIATE CONTOUR -� SWALE EXISTING INDEX CONTOUR EXISTING INTERMEDIATE CONTOUR UPLAND HABITAT ENHANCEMENT PARCEL BOUNDARY EXISTING WETLANDS EXISTING STORM SEWER y BUFFER FROM PARCEL BOUNDARY RAILROAD TRACK WETLAND REHABILITATION (l(( EXISTING TRAIL f ® RIPARIAN ENHANCEMENT - - - - PROPOSED TRAIL WETLAND RESTORATION EXISTING CONVEYANCE DITCH EXISTING TRAIL T.. Cl TY OF TUKWILA tr FEDERAL RESERVE BANK a1�GL�i�O•�i vOi�O•�Oi 1 SW 2TTH ST. SOUTH BOEING MARSH UNIT C Arai % ANo!/ UNIT B. OAKESDALE f x MITIGATION AREA SEATTLE TIMES MITIGATION i CITY TY SW 34TH ST. OF RENTON BNSF EXISTING R.R. UNIT D UNIT E // / SW 41ST ST. CITY OF KENT n -v,4 J N IT A }i PROPOSED -TRAIL LiJ r LINKAGE ALONG CREEK ; 1 ' ` lrEX1STING TRAIL SEA TTL E TIACS x DEVELOPMENT o SE,4TTL c TIACS + OFVEL OPACNT tY m v I 2 SPRINGBROOK CREEK WETLAND AND HABITAT MITIGATION BANK : SUMMARY CONCEPT MAP LEGEND PROPOSED INDEX CONTOUR WETLAND ENHANCEMENT PROPOSED STORM SEVER PROPOSED INTERMEDIATE CONTOUR � SVALE EXISTING INDEX CONTOUR — EXISTING INTERMEDIATE CONTOUR um UPLAND HABITAT ENHANCEMENT PARCEL BOUNDARY y :EXISTING WETLANDS EXISTING STORM SEVER WETLAND REHABILITATION BUFFER FROM PARCEL BOUNDARY RAILROAD TRACK EXISTING TRAIL Mx%x%n EllRIPARIAN WETLAND RESTORATION ENHANCEMENT — — — — PROPOSED TRAIL IEXISTING CONVEYANCE DITCH CITY OF TUKWILA L 1 81vsr UNIT E UNIT D EXISTING TRAIL 1 N UNIT B. ^ U N IT A / SW 41ST ST. OAKESDABUSINESS PA PARK / 1`-15" DIP 1 TUKMILA 4 i, AT MITICEAION T_ SW 43RD ST. CITY OF KENT \-PROPOSED TRAIL LINKAGE ALONG CREEK EXISTING TRAIL E.4 rrc E rlAcs DEI/£L OPA/ENT SPRINGBROOK CREEK WETLAND AND HABITAT MITIGATION BANK : SUMMARY CONCEPT MAP LEGEND PROPOSED INDEX CONTOUR WETLAND ENHANCEMENT -' PROPOSED STORM SEVER PROPOSED NTERMEDIATE CONTOUR —�— SWALE EXISTING INDEX CONTOUR EXISTING NTERMEDIATE CONTOUR UND UPLAND HABITAT ENHANCEMENT PARCEL BOARY STING STORM y .EXISTING WETLANDS BUFFER FROM PARCEL BOUNDARY y' y RAILROAD TRACK SEWER WETLAND REHABILITATION — EXISTING TRAIL RIPARIAN ENHANCEMENT — — — — PROPOSED TRAIL WETLAND RESTORATION EXISTING CONVEYANCE DITCH Cl TY OF TUKWILA 4 SW 27TH ST. i SOUTH BOEING MARSH UNIT C A • _vA�i q • it .•v : � . � a' • ..e "t• -v ■ ����•t•1�I ••e•'• 6n ����9 ��•,e•R t••`Y•U� •f • • ii A ♦va t�i e• e• _ h ♦ v vwv \.vw.w.. r f• e• m• e vviv o • • • • a� •a:kswvtvowv �i ♦ • c • c c + ����`�' •w' I • � .rt7pl4v. p � • • Y • • • li.1.0l1' vo. •_. • s vv� m•• •f•e •• N��A�y � _a"�w�vA�Avivwq•�• - K vwv <�o v f � v.� .R•hSNlit)6Mhci� a •�. _ _ . ": � - CITY OF REN TON J BNSF d 1 EXISTING R.R. ` UNIT D DAKESOALE BUSINESS PARK a�O . \ CL(> o i15" DIP 1 TUKWILA MITIGATION 1� ! AREA i-.•..�- �.._.._SW 43RD_ ST. I EXISTING TRAIL 1 1,A I � •� yN. UNIT B. OAKESDALE MITIGATION AREA SEA TTL E TINES OEVEL OPNEN7 SEATTLE TIMES MITIGATION SW 34TH ST. OTHER WETLAND MITIGATION Ili Ayr'. All VA ' Gla;° "A iit''i AA\� 1rL �l7A�fi A AvivwuvwY. Div � ai4vw+agUv. • v vi IQIN,}Rf�Y I w�yl Ap •1 a 7 i wry ♦ A\ A� CITY OF KENT SW 41ST ST. SW 39TH ST JJNIT A r I ^ • w � !� I< pim PROPOSED'TRAIL Y LJ LINKAGE ALONG CREEK 0 r—EXISTING TRAIL U 0SEA7,rL E TINES a OEVEL OPA(EN7' Co f Z x 0- f r 011 1 IHMM j A 1 I � Js i v T i T I T 1 T 1 SPRINGBROOK CREEK WETLAND AND HABITAT MITIGATION BANK : SUMMARY CONCEPT MAP LEGEND PROPOSED INDEX CONTOUR j WETLAND ENHANCEMENT �•�•�•- PROPOSED STORM SEWER PROPOSED INTERMEDIATE CONTOUR >— SrALE EXISTING INDEX CONTOUR EXISTING INTERMEDIATE CONTOUR UPLAND HABITAT ENHANCEMENT PARCEL BOUNDARY ;EXISTING WETLANDS EXISTING STORM SEWER l BUFFER FROM PARCEL BOUNDARY RAILROAD TRACK WETLAND REHABILITATION EXISTING TRAIL x ® RIPARIAN ENHANCEMENT ® - - - PROPOSED TRAIL WETLAND RESTORATION EXISTING CONVEYANCE DITCH ?ULg ll.CITT IIYITS ■EMT CITY LIMITS v � w LJ L w 6 L] I I 7 �' I .b b ysb9 O Z Q J Z ' O Q LU 3F—"I Q 3 ♦ IeoTH sr. sr 47ao sT. s ( 7-W r-tv;7 'A w 1 `I �iJ2 R f J 44 LAM Ae a�"�'�► it CITY OF TUKWILA ti cA.PiSWi°iaSSSWi Ioi°AAi">ii.SiY1 ??sY. i•AiSWiSWAAtJPASS•rAPJ+•A°Ah Y•SYAsS•PhWf� �L`dtwf,.f...::...:....:..e SSYAaS•PAS°lAAYPJhSYhWAA9 Y••ASSSSW.Ya*. � \WhY•hSSLS:SSYAe°.Wi°.°aSL.°d0, j •V.WA:ii.4SWhSYhSSWl•SSYhi SSSSWteSY••i� y�r ��JAY•S°AAAa°hWAJe••°AaS•iY.A.� �A•AY.SWhYJSSSSSY.4°••aWAh6 •r•S4o"iS3•iS•ii tw� •WeWJ•YthY•Yo°AhYA•Af•Y� E :WAWaW.YthSWhYAh°Ar>iSSk wr yr �•i"tPeWAtJihWdYA•SWier+ 'r r • ewrr r r yr Sa sS°JJP °~.•i �!hSSaSAia••aShihS•,SWt.«°: WteS"te•Ai•J,'2, !••JA��tJ,Yi'AJAYeWtJPAbWdS PPeS°iSb°iSS•i°hS•ihiY•S°J°SYAh $JiSYeWi•A"i. S'Jh`:\\;•�°°S;r.SReff�O.Y.•hSr. P;eSYhSYiWiii°h,Ai•AA'A,S•ri°l' °th••°.Y•YaaSa' 4Wie"l\\ hA,S•,aa• AP>SWiS• t•WhhthWASY•SWiSY•SSYAti •+4Yi'ePtteJl-SWiW'i\`;SWJs�rfS9ifS��J�•Adi�.�i' thYJt•S4WttAAJPiSS•iaW,u ' q°i••a •i°vYA•Wa S•.SSSS \� �hYeitooho••se°•>e - � S�eMAhvh�Wh4J4�•SSSS•f0:.: kep a Vif°Je�!i. ��YAhti ti yiL�•A�i•JW�ti�••°s°>iL•h•:hi: . ArhSY,•rhSYhtthAJh•b i"A ••e•h• aMeS3 ^� •Aabi ' �°eS°i°iWJA•Wi°AJPAJ>WAS°i•iS•A° a"aa•iaS•.°•d•S �•AaS•at Oi ihv�•aWi3SSSt•AAiSS ff°faS} � ` i:A•Wi>sS°iS:•ofiWiK•iTJASAu ' A°f•iih S•in I,S<rar t eeSWA°irtaSS•hSSYAAeS .. ft{; � fAeWhWs°tJ>•hWAeWASJ•A • 11 Sda4 frii � �iSY �!'• �'��iSSY34��0Aa��•c�' YP°YJ•SW.•JrreShS rr > - f \ •S•ee•PhhtiSYi••AutiA vrn.='-.�a - T' fro wr r r •r ° ° i e a [ `^ •fi'h°ev•P•°eiSSSSS•i•iWAAti7 ' PhSS•h 1KuNhh � S •, t i rr r fs f w w fv • •PhYthSSSWhNh• rrr o iaa. \aahW:S•AAraSSti.•S•Ari. Jte1i•Jhi•aitiSWJaiWv ! qSA;�; �,"iravl �•S•tJAaviSS>A1SS•>°i4•.•SWhS:�Jt.ill hSYs•AeYeSS•i•PJ•SYe• •iS'ka•;h:° r.QVJ•�!i°•!•�L••a"W>•e��,Mc•SYa•�•i•;. •f••ereaR•rr.0A,0,P,e a. I.oif'�f�f��f �. �� --""'L4� �!°" EXISTING TRAIL 4 EX I STING EXISTING UNIT B NIT A,T EXISTING CULVERT CONNECTION BETWEEN UNIT C - oi,Cs irv�, z EXISTING 4 "AND Of VEL i• EXISTING VIL Im CITY OF RENTON UNIT D —12" 01P } E%I ST ING YE rL•xO �ITIGAt10N w ' IIURYIl11 I' a- sY al,h s1. to - EXISTING •..,,.fr,,� WETLAND 4 -�•• T C" MITIGATION ON" UNITE - 1 � IS F >Y —T 11. a.. : ...1 Y1LI ['•> f f r ,r'� y.. .. i �14 l S ry, ;: CITY OF KENT SPRINGBROOK CREEK WETLAND AND HABITAT MITIGATION BANK : SUMMARY CONCEPT MAP LEGEND —ao- I1 'NAD IIOEY CDYrWN - INN►DfED IYTENNDlArt CONTOAI [IIf1= IIRI [OIIDIAI IYI ATINp IY T[%1NDIAIT COYTDYII �_.. [nfnYc Knum �>NRAND N[�[flA�IfIKNI MryAAO--ILITATID• KILAAO ENNANC[YE., ^AND xQIIAI [MIANC[IIYr Y -11. IRCIN'—I DONOMT ® [aim I IWAIL NI•AA1u I+I.Yc[A[Nr CITY LIY1rf-IL%DAD TRACI —' ONOYD SIM f[YEN [IIfTIM TRAIL ONrypfID COIKTA DITCII • - -— INVDfEC r411 fAq[I fWYDMT AAYA TOM CIEAN[D • GIIINtO [%IfTIYO fIOY f[1[N [Ip E11W CIDKIANCI IT. Hllen Quynn - Re: Elevations for Springbrook Trail Section Page 1 From: Ronald Straka To: Allen Quynn; Leslie Betlach Date: 7/25/2005 11:49:42 AM Subject: Re: Elevations for Springbrook Trail Section We have reviewed the 100-year floodplain elevations against the topography for Unit A where the trail is planned. The maximum distance between the existing ground elevation and the elevation of the bottom trial deck low chord will range between approximately 5.0 feet to 8.0 feet depending upon where the trail is located. This includes a 1-foot separation between the 100-year water surface elevation of 17.7 NAVD 88 and the bottom of the trail. Please use this information in preparing a conceptual section for the trail and we can refine the exact elevation as part of the project design. This is based upon our draft FIRM update map that we have submitted to FEMA for approval. If we follow the existing FEMA floodplain map, the maximum distance between the ground and the bottom of the trail would increase to approximately 7.5 feet to 10.5 feet. (Z If you have any questions, please contact me. Ronald J. Straka, P.E. City of Renton Surface Water Utility Engineering Supervisor 1055 S. Grady Way - 5th Floor Renton WA 98055 Phone: 425-430-7248 Fax: 425-430-7241 Email: rstraka@ci.renton.wa.us >>> Leslie Betlach 07/21/2005 3:22:33 PM >>> Hi Allen, I have the Landscape Architect lined up to prepare some sections of the proposed Springbrook Trail. As soon as you determine the 100 year flood elevation we can commence the work (sooner the better). Thanks, Leslie Leslie A. Betlach Parks Director City of Renton 1055 South Grady Way Renton, WA 98055 Ibetlach(o)ci.renton.wa.us 425-430-6619 CC: Beth C. Peterson; Drew Coombs; Jim Brennan; Sharon L. Wright - SEA 'A J Ll W J m A po o- CIL yc" uz w Y. - d h b m m a O V d 0 �L of b - �• ^^ .r-. ^ d Vf r N d= 'y^ Z ti sl O h- N O O - 4 � u rG b r c0 T Z N .-• VZ LLU� VONNN .r.1CP0. 1DWNN M�OON���Za� OW N SOON N LL C_ m m m - N - -^ 2 r - - � .2 W. r r - .-. -- --. T O u tk >' O vl N o � ..-_^oommoonnZ�n LL r r r m q 7 d - - - m M, 2 Q N - N b r1 - - n � Z�22 N N M -1 d o -T ..=���-..=rroao�c 0R a O r iv ry W oLL � U 3 LL Li. m h 09 R In r - O v F LL o .L i O> y pp b d d b b R ry N m C 0 pp p N b-- p- b- Q d N O C O P b P d- 2- O_ N N W } p N - 0 N ry LL Q h "i h - - _ - - - - - OR m N 0; ^ _ N N ry m C o A sl A ,� - LL .� b b 'i O n �� - - In b m b O O P rf b P h P T Z P� d O OP O-- •- v1 -- W ... r - .. ^ N N N >> P LL 3 Lit "� 0 0 U ti C G d m n d N1 d d h00N O In O a fn d mlp- m O b OY o� LL I I C �p ry po p -- LL 0 C C O V O V mlm N 3 y v_i� ._ r:dd2dN 3 � o � � I 09 11r n w1 r b M --ev vib d m 0 r2 r- m u S'i M O 3 y a LL LL 55 �y zm U N Y ep E � e0 L y a � v = iry A ALyy9bccNrvnn 3 0 0 3 3 3 3 I yy33 S i u iQ e .'dc t: 0 03333 ��aa ��oo gg33 'C J m m 1� N V V Cn m Vl m O Om Vl VJ VI ; O m m0 w U U NV)NVi V V V Nm m fA I 1 r LO W JM W i a A m, O O O O N Cl) t V) b w b r Iq b b 0o O, O .: N 7 r N M r vi .M. .M.. .M. .M.. .M. .M. .M. .M. 4 .vr b b .r. .�0. 'D �D b b b .r. .r-i t- W w N N N y 3 � awi o T pup W G .0 T O 7 O0U O O O1 "1 b b vv�� pp N�hO ro0o 0 0 D, 10 r a0Drrto ^, r r r O U W u t t M (n v 00 00 N cn r o; 0 0 r .» o O; O; o v a 00 0. r cn lei eN y O W b> O U O N 7 00 ry� C O O N N O M O\l7 O O O O\ ... � U U V1 b r O� N N Vl m M M V) b 00 .+ N M V1 N ww V N O O O .r .+ .� .y ^. .-� .N-. .M. .�. .�. � � .�+ .fir .�. � .�-i .�+ � .�•. .Vl-+ b br-00 00 U O T y u [ 0 O w o ? d w O O p M N M 00 00 0o Oo 00 00 eq � pp pp 1- � pp 11 44' U❑yp M � � Grp h h h �p Grp ywj y'j � � r r l� �O h �A V1 v1 v1 v1 V1 vl aa�7�• " �" 0�0 r �O V�i V�i Vrl V�1 V�1 y$ W o 7 U k" R V N O N 7 b O� N O. b 00 r O r O O0 r'R r O N- 00 - - - M b 00 O\ (V N O � � w ° 3 W T U G O N W o C U0q q o U d a oro 00 0o rn M m `hi' n OWOWv v 0r0 00 00 > U o 0 o rn o0 00 0 0 0 rn O.O\ ��0000 000000 rnrnrn �kcUU O ° U W � N ut ut O O� 00 O, M 7 b r N 7 r 'It V) O. O N l� M oo O M O y N y W g W 4—v- > o ° 0 gj 00 Wo o U v g o e r a o e� rri g�rnrn°oeCU � U N A r A .. U r .w " z z 00 00 00 0\ O\ M M t 00 .-r M r 7 V1 11 r 00 O� O� O V r C: M o o '=v U 'd > 60 O O U �"' i p 8 p 8 C, M 00 pM M O N N p N p T T 00 O O O O a D\ N N 8 00 g r w w M M M O 5 U U ; c n ONO o o rn O00 r r r r (CI) .�. r r r r r r r U ❑l C ow w o� rn N t N cn r r .. v o t e rn 1� 00 .. 0 0o O; cn M r 0 \° o N vi W O\ O (V M V V1 V1 V1 �G r 1� fV t�i M 7 Vi Vi V1 I� O� D\ O y N y 0 w °� 3 o u oCp .p OD U v > U U o U ff, OMO OMO 00 b j j �j N N WM �.n+ O; O\ Fl;�VO1 �Vp1 r r O Y 0 U pu ,^.*. W w T U O N p � W � N N p0 pr+ O U r>.' .00P N ? pr Vpot O� M r M r M r NM 00 w M m r m \O N ON4 N ON b O� 1N r Vp1 N N 00 00 r M M M M M M cn N N N •N V �+ U 7 7 N �0. rn91 qq G4 [� y U U ° U ° yio >yq X o.3; w u 1 0 v aT 84 ci v g 6 � �s -5 4, .��� �> � 0�3t � 0-S�� ��-2 1 1 � N M M v v 7? �.r W A Vl 00 'O '.' N M M aJ �' 7 7 3 w 3°° U U 3 V] 3 VJ 3 3 V1 VJ 0 o 0rnGo o �w �'°a��3 °333,IIi3 o O o O U. !si W U U W W W 00 h s Go r (915 41 m m m 20 0 m z m m 0 el 9 m z N r w Cf)4 m m Match Line Sta. 14+00 See Sheet 36 (/;I (D (D f.t• Match Line Sta. 18+50 See Sheed 38 O C y s -• a i » w r m N j+ j II{++pp11 Aj 3 A f O+ O r III o o $ o a n c 0 0 o m c Cp O 3 3 a x tea° > w k � K N 4 f N 0 as 79154 Match Line Sta. 18 + 50 See Sheet: 3 P.C. Ste. 18+82.13 -4rm>ro _.. t#F3 a.:. _:.:__... _.._ 0' SPRINGBROOK /.E..3,50 51 GE: .60 r �' CREEK QTI �►'riatch Line �-uL III n 8% N 0 :E: r C C 0 1 + AO I/ +775 $1Se Sj)e Sheet 39 ... ., .... .. -- ._.. ... :' ...: : : .. i .... _ ... i_... I .. .. .. . .. .. :: :.: _.._.�.__._..._._... .. .: .. .. -. ... .. _.. j .---- .._.. :.. �. .. :I .. :.. ... .. .. __.._. ..:�:. i ... _. t4_+00 f... ...... 0 _. . ...... /...-.... _.. �: E.KC�.Sto.24.30 l7'9154 u� 33 ni ni n1 • 3) u) r ni _ �i c� _ 37 )' rL r�ri � .p M mM 0 m `• q nl 3' nl 2: M" D m < 0 2 N W O O V O m .n d (n � • � m n 'D a Aal L� +�d to at n 3 5 r: r one o r x O N 3 m . mAo m W r t m -1 1�, e U •I. .� ,� y» O d � A O Match Line Sta. 23 + � 5 See ;Sheet 38 P•T. ;ita. 23- 79.08 y—heat 40 Match Line Sta. 2a+00 See S 10 IN iA 10) Co 791,154 m m c m m U) m m m 90 v a z m 2 0 m m z C� G i 40 2 CD 4h- m m m Match Line Sta. 28+00 See Sheet 39 N N r* Co I Sta. 30 + 60 I.A. 2 2' Begin Transition Sts. 31 +60 Lt. 28' End Transition Match Line Sta. 32+00 See Sheet 41 W 0 O C.)O .1 i b T ry O' 0 ro e C O N y N e » w0 k a n Gi xa N .. .0 , m y L + a q C4 < 0 ? 3a: &(I rTn y -4 K p r ro le 0 k o� Y -n m 3 3 1 m s G A o Wr se a m 1791541 a R "a z 0 0 { r N Q m I It ®r.�r_�� 77, r "C-4e .. 77 '."tf. .0':..' .. .. .... lf�R(d' M 1777 FpC. X# llirs Match Line Sta. 32+00 See Sheet 40 3ta. 36+00 See Sheet 42 Gutter u. a Rt. 0 0 A •• T •+ -� y 07 CI T + N W y + N A C) 1 1 w 1 � 1 N S 1 1 O 1 1 O O O O . ......... O. N W N W ' O N ' W :. .. .�. O s a ...... ......... ......... .. ..: :: .....: — N N O V O CIO 'O N O V O p W In n _7 O A r N I' T L m o r M r k b m R p r N W O _ _ W.~ w D O O 4 A W N Ui n N m O. y O. O O ] y ic a t' -- - — c ; m �) n _= C •.._-_._ -- 1 Q ; 1 1 O OI . S Y A S Y ^ ] O Q._ .� O O 2 C Y e z O O » s W R R R .................. y....... 34+50 MATCH LINE G.E. 17.26 w m o V MH 374 65 32'R N N t N S1V27th�STRANDER BLVD. i0 — w M S 4r�h N N ct 44. S p/0 w FWFR �0R ao cn -1.2 79.1 R FLOW MH 394-14.5 37'R B• 4 c m V i 43+10 RB L Storm Inlet G. E. 17.34 NIH 43435.5 32' R M—.H. 45+63.50 32'R iT MA.45+69.50 37 I w 0 E:#3iH S 89°.40'25"E i lco-- 43+00 r�IryyO4 s^ x to .J " r N 2 lei N �o N .N{ tD D O � O n O V A S.W. 29th ST. INV. 8 !� --82' L INV. 9.15 73' L S 88. 24' 47"E 46+50 MATCH LINE ly SEE SHEET r/: lll,I'ii,' Itil1 I1 I�iII' Ii II'14 i I'I' i :Iii?, ..... ..... . . ...... .... .. 1 ICI L'� Ilrli i . llll illl ! �+, ,,:i 1�it Lit.......... .. .... .... it 11 i;l! it ji It It I, x r it ..72; 1:. ji .... ..... .... . X. . .... . . ........ .. ..... .... .... III. I f i � ,... I ; I �l�j ;Ili III rl 1 . ' 14 ' i.il i � Irrl' � 'Iilit I ' ' .' ... .... .. ..... .... . ..... ... .... . . , It � I li�! .... .... .... !J .......... 1q: hit To ... .... ... II III I II iI`I it ji. it it i } I I ' .IIII I,I! I i Ni 1,; It I � i! { i ' ;1 i1 +j 1l!'T it hill ;!I'll; :ii!RI11.1... 11. 1 i it V. I,I >.I i I ............... Vil �.... .............. ...!.; . . ......... . .... ................................. .. .............................. .... .... .... .... .... Ji, it T 1 Ili; illl it IM111111 zill I . : i it :tl r m > 0 'jl, IIII ll, Ii I I �i ;o rn Z it m oti m^(:'Ihlii ;d UwF Ln 0 < -4 0 r rn > 0 -q '1: z r o 0 OD I c rrl r Z.!. J ii q 0 0 (A 0 -n 0 nijii rnN oz it 58 450 MATCH LINE SEE SHEET 3 Ij rp /, iv \ J - � r. gCCA�T(, FdR OVERFLOW p o 70 T .4 D 3 uIN rn 0 r Cn D co o Z o m r � r � z� S u na � 3 0' mn 000 yNo � � m � ••e �•�p R N ;D 'y0. 7- A o i I �`�' `• A381S ylt,2 •M•S - z o r, - z� r Jr N v{ a C) { 7 29 z8 ' m ~ o � fit, N i Si z 4 AS j = n Q 2R a ki i n a (� -4 D a i D m� Z0 ofm `- .o � Z yrn > 3 s � Z H ` �r Ul 00 p co s m m O N m 4 T p S s 6 $ Fl cz LN 9 1`n m Z ID_NU r1E N 67. 3W 08` x 17 �Q x w _ IIt%.-M aWVALe I 3 r ply h �`t g:m p m tSae�^ aai�n I 9 1 yY i INSTALL UNDER EXISTING TRACK y u r o = D � Om 84 th AVE. S. U 3 N N O� G O N O N Npp ff/N i m Om DN uVN cir3�r O .O frlZ yy ♦, V m j "n N �K < xm m E1.00 MATCH LINE n mr i _ V / p A, QO Q i � N V tl� n� n / 1 10"-154' PT _� TTNTN—tN 'Imp mCfA Fey �C xTx N 3T m g F i y2+ 02 m pn m Ci ``0nn y~N ,< x �^ o m v� m O "x py D Z m ��-�_'0� 0-00 zz z : z � -- - Z UINp .. -- M AVENUE WPf N N � + +pp Ivy k I N+ / / D Z Z g� m � � x r J0 N m \ \ ++p 'gym_ i ,s II0 N + 9s,4n o Lys77 A- A a`r �r 14+32 27'R 9J. Gr I-12 45' Berta MJ -w 30 <o 5w Cti rn f I� a s x L I � N / N N_ No / N N � I x rn o CL to o I � o � coo U? s i Ln S Cnn `.1 M ; �\ \` N No \ c \ a \ y N + + r (A (A om_ 4 0 a N t� Nam.- .. G3 O N - < 0 - )A 2 V.- F" -J - i r 23123 11 E 9+95.11 z 0 00 r• m - 4 th sw au rn r. �l O co 9 F N 8+00 MATCH LINE 1Iw 7 UD N + 0 co N I X�Qj F ,°p '0 .O o _ x a N W f i A .4 N; 7 : P ; . ...... ... ............ (A . ......... . .......... ....... ... 0'; Ulf .L- , I 1 1 I 411' Ti 7 Al ji. .... . .............. ................... .... ... I. ......... ... T. ... .. . .... ... . ......... .... .. . ... .. .... .. .. .. . . id �:I. Cil .I, IIIH ill ill ... ... . .... .... ......... ... ... I l' -- .... .... .... .... .... ..... jII III 'I III 111,1 j:1 a; II .;I. J. 1MIIIIII .... ... .... .... ......... ..... Ll' !! �j11 :11I'li! 7 $7 1 „I� If II 111 � # ' ' ' U. I':'. ill rn . .. ......... .. P ki lb, L 1.:. !A . .... ........ .... .. .... .... ... 'l C c wIII I fillll'' I IIII' li' ll'�µi ...... ...... .. .. ... ....... II Il .... .... .... . f... ::I II ! I I Ill 1, II lil i1 ..... .... .... .... .. R Of.j.;;. .... ......... .... ... .... .... .... . ;j li. lll I I I t,ll III Ill, !I I IIII I ('' I ` ILI .. . .... ... ��jl . .... .... . !1 i U ... .... .... tit!.... .... .. .. .... .... .. . .. ........ -J; 11, ... ..... . .. Ij ............. fA fill ........... ... ... .4 _7 I. . . . . . . . . . . . . :d1ill ....... ... . . ..... .... ... .... .... .... ..... . In IIJ,GII!'ll' .. .... .... . > n 7r, z 0 I f I!� f�f'� 1� -0 rn 0 "Il ' r :IA; r m ocm"• .f( I I a) z M 0 11 0 r F\) ;lE 0 0 rT1 0 z m c j;1 1 34+50 MATCH LINE SEE SHEET MH 34 64 37t m 0 FL 0 c S-6 M CD 0 Yss6 96 2 28 28 I:0 UD 36400 N6 + Stor G.E. Inlet 17.26 15" J MH 374 65 32'R Op SW27'h/STRANDER BLVD. N S 89*40'25'E /0 0 38+91.2 79.1 3 . —FLOW 244 '10- MW 11'.94-14.5- 37'R Os AV' R pO 41, roCA N, 4A G) N 91 41 400 2el 2 V7 -4 c �5 CD w --4 0 c: M co CD 43+IOR9L 43+00 Storm Inlet G. E. 17,34 MH 43+35.5 32'R If 3J O elu In ID A Zi 0 c" 0 22 jr, (0 O S.W 29th ST. %d.45+64.50 32'R 4 INV., - 3-15 -82'L M.K45+69.50 ffTw— 0' INV. 9.15 73'L S 88* 24' 47"E 46+ 50 MATCH LINE SEE SHEET WC11" nlbWA AND M11M dAt,M.IAjgM My., r• M+►r+iMY+At rl.wrr�'��Ar�q�oollur�ee.olww�A�rwr•ew��a.M M.ro1 10 10N) lh MH I UM JLINE STA 41 +50 Z 0 m � � O D rc—D n 2 < o �o m a c)8 m + 5 O rn Z Z N En O 5 c> m N S �o i I I I I I D m 0 wZ OD -� +� �o v m OD n — HP 2'1 3 lk VI N R• A 0 PROJECT NAME STRANDER hi Vrn r-x•rcnieinpo MATCHiiii LINE STA 41 +50 SEE DWG RP2 P N ♦ f1 � y.. N # � � G � _. � � u .. m A m c A m z z _ z �� m m y D O H O N S� O m �� xxxxxSR$ 8� r -�ata x x x x ryA� I A N A x x x x xxxx xxxx PPP -SS -TT CONCRE iE ss — 15�0 ss S \ 8 \ W. all tUVROW MVMK wo W* 0. 07, 70M•121$M M A1nwA�riwwrrwMM�t /w8� �%�'� MAlDN71d.IA la7M fhnr: 7o't . l6 T 0 0 Iu' I0 IN MATCH LINE STA to I I I I I I I I I I I I I I I I L� 3+00.00 21. i I � I I I I I i I I I ( I I I I I 1 I c I I I� I I I � I I I h I � I I I I 1 I I L- 21. I I I I I Ib I I I L I I I I I MATCH LINE STA 46+00 PROJECT NAME STRANDER [§Lvrn FXTr-mclnnl MATCH LINE STA 46+00 SEE DWG RP-3 PPP-SS-TTT I .O L PROJECT NAME STRANDER [§Lvrn FXTr-mclnnl MATCH LINE STA 46+00 SEE DWG RP-3 PPP-SS-TTT I .O L UCM%0ffE MOWAt r0 PAM 0k 07, 20M4. f2la" 1M �'t"12 h.Mry tf*Mr�jp(,I�pp-AMIDO_CM w.t�mwnf.t.st tt7.ul Mwf.:fpf rn n Lo $ 0 4 e &jq II 0 III N 1 D z 0 m c/> X o $ �O � o >7 �cn mm N a z� m oz F, z a r� D G) m Iv 8 1-0 ji�n Itoo It') Ln MATCH IINF qTe &r-Lnn o 0 �+ V III I I I I I I GRADE I BREAK I I I' I' I� I I I I I I I I � 0 I I I I I � � 1 I I I 1 I I I I I ( I I I I I I I I I I I I I I I I EL - i. I I I I — MATCH LINE STA 50+50 ICD I� PROJECT NAME STRANDER �LVD EXTFNSInN MATCH LINE STA 46+60 SEE DWG RP2 I I s ° J0' 0 I � � I I U CI I M Q "lJ G hrTT lJ LJ c�, 1 j,f BP • < 0 MATCH LINE STA 50+50 SEE DWG RP4 I.,f PPP-SS-m n . x 0 O z cn 58 c O z z O[C114! AOw[ Me M/N Oa101, ]OW • 1:}q.� M1- J.1t�_pw�}pµ.p�yy«,M1S J �-M M�MMw`1DOJM.1CA00_dtAMMM�yM}�,��.�.w,� �MMMY�c r�M C11 L4 V �N I" ICA MATCH LINE STA �rn.Lrn I I I I I g i n • I I I I I I I I _ I i I I � o 0 x # N(n G �n F) � c� I i I I I I �xxI • X 4 I � I C EL I E BREAH N <o A I I .� x I I I EL - I I � I� I I I o ti I I I I MATCH I LINE STA 55+00 Imo' Im Z 0 cl) m mco 0 < o c gig m0 zm D I _7 G) N S _7 7 7 T", im's, PROJECT NAME STRANDER LAI Vn r-vrmKic%t^p,, MAW a BP ' i g x �z o a I N � I I I I I I ++ I N N � I I � 1 9 I so MATCH LINE STA 55+00 SEE DWG RP5 PPP-SS-TTT O R "CMO D IRC.•t NO F.tN Oa 20M • 122" Fr•JAT--DMy02p444.•y~jjF�1bVV-4'MADD FWWCADC�DRA w>Mauey.NDMAt•I,h� 1.1.y11y.r,1v01 D Z 0 cn m m N O -V Co OO 2 0 T o D zm m� O0 Z Z o. 0 D m m N S- i i PROJECT NAME STRANDFA %I vr) I=YTeKie1nf,1 PPP -SS -TT' MATCH LINE STa 55+00 SEE DWG RN ' .30' J I ( sow _► s W --- X � i x NI � I� • I I x I , x / l Iy . - � x , D x x r x �I t , x ' I I I � I X � X 1 t I � M I � o I I � �I x N I I I N Io I I x I x I I 30' so MATCH LINE STA 59+50 SEE DWG RP6 0 r+ m -- AIKH L fW"-AM R \01 . !M nc - -<1.4 0-- WWWmPwI"M=__ pN%..j VA F rn q n Z n rn m m s . 1� a co. R /w O^CIFIC AIL.WA 1 L.WAU� �E - � �' C"k AG© M -- - BURL-1 C7h O RT F-I E R l�l R WAY R _�/ ----- --- ----------- - -- - CHANNEL Sd7TOMy°- _ PERMANEN•i- ES MT. 1 1 � O o m ; y � 60 ti y m zA ,1 o 0 co 0 C z -1 LA � S a Ocr a d ao i N W J � J J > o W U)LLI N z W US �i a h U c >- a Nro w� wa �a C �3 N J W W h :.owu zo N Ld yo~ W m ¢mV. O- 2 OzUW ' N FQ Ja.W twit URWM aZN 2 u d Z z WN a' w N T N LL W oir VUQ rmz 09 K NO N� pa O m m Nr �ZU JOX x ad O v_3 N w t� OUW a NN gNN Oa Q ni '�� —f-- 3NIl3dld OId WAl0 „bl rc t m/s a 1Hon 83MOd CINnOS-Lllfld xko 7 / l W 1 w I p� W o 3NIl 3Sa3Atl 1. ; l�;.. N �a '1 WS3 'Wa3d 01 � :d M/a 1HOIl Ha3MO4 ONf105 1300d _ � I rc / W u in I O w a'a 0Id61d j-JnVd'1S-33Mnvm-IIW-OOVOIHOcr aN Ial I x°i z 2 rN \.\ 1 R a r I o Q w O W =N pl I rcN J J 2> a N az e N OND N tU � U v 1 I �I ` . o O ( �I p / Q O '1WS3'a1SNOO 8W31 ,0£ N xr /�/ h 0 ¢ h u d a s N83H1a0N N010NIlaf1B a fl h \� N I I iY� z gro Q ��\ o N. �a gFFh%� h d0ad MHVd a3IOtll9 3ON3d 3NIMBa'OB { awl, .jA 8 I ti 2 0 4. 0 0 0 0 I I 0 O C FD 8 0 b O 11 w U 1 1 l 1I I I i i i I I I I I I 1 I i I I I I � D I ° f EQUATION- 19+00 AHD= 18+80.16 BK. CO D M � z M W M aa D m m Cl) _ O 0 ❑ cn in M y � � I M — o m 7 m U O o � r D � r CO cn c� D 0 Z T 0 r r rn D Iz < M o� N 2° 07' 50" E Fr C cn 0 � c I I 0 _+ N c n m I D O m z m x M M " D Z (A -1 M N f m M f m ' m C) D c O z D n Iv rzo N C� O < T V O �c� me —i z -D 0 oM m� 0 0 �c :O z MO O � M mX x� D 07 �r om Z N a m� 10'UTLaTy �I EA7�MIT r D t— rn rn Z C 35 t00 MATCH LINE- 5EE AI�VE ev 28' T IM 31 yT 45T, Gi E0° 2q' 2q" E 37+g3.73 43' G.5t I-12"LRO�h MJ I.12'•IORP-9LKER °E O,,ATTC VAwe MJ I-12' CC��ppA'.VbLVE kJ vj (ONC VAULT �KLE 70 CR03°'i 30+00 4?,' R I-12" W TEE HJ+PL. 15' MVO�FlFE Fhv. hbvK 30+10 43'R M 1-0 4ATE VALVE MJ H/CONG VAULT u [ 0 OT' 57' 39"E D W P;q + 3tx.09.4 PT Y4-cCTION LINt Z a � � O Ib' UTILITY E:AO McN7 D r z v 0 1 D Q M , = < • § - E" = Z 40t70 43'R I-IE'*Id?CC HJr Dy I-5" MVO FIRE NYO m = 40w149'�'K I 10'�EE+MJ� t. <<o F v 2"TAP �.� m ;n 3 '4 i O 422'PMJ \Y e' TAP gz �m o C � Z N Z `V 2At00 MATC �iEE hHEe"I 1?W *711-15T. 31+37 43 K I-l2'4FM10 NJ I RENTON CITY LIMITzi '11JKvlILA CITY LIMM2 2/n+15 *J- 20R AR 14PON EX • laP.1,0VALVC CONNMT TD eX. lo' VALVr 12"x 10' RC'X(,m MJx Pe. 12. 11 `49 mND PE,*MJ. F.&OWC M. NY0 31' L I-I2"•b'TcTs MJ•FL I-Iz' PLuy 2q + 10 l5" /• L RELOCATE EX. HYDRANT, T0' hl' L q*02.52" 50 t70.7)5 2' K ". 12"LAP '04ge 2'R L"ILAPDeNAPJ b4+05..02• _ ° A3`� Sr. ; .oi e8 8: s3s.-e Nip, AB�R N$C ate" q q�TS 9 '29'27'E A o, N 5^y 4 = S 9->�; g,a Inn.'(7J)j4 TT � s )61%6 4, I-43'IC - 34't'a'o.02 N'L = "» " -12'yATE' I-W-OTEE MJ*FL ; y a s q gsa a ,$ x M) n/ I-5' MVO FlRt WP A55Y VAULT II=1 MJ. »8� 8' ate; 3'- ryr 'F- 1>5+LYE MATCH UNC' s'_n� E ? x _ a IIF o f s R = e s N n n ID =!� E3 83 R 8 :3" .� ni ^`EC oz -C4A r 33^ � N 3004 41-12-92 DLO to I* I* A a L 00 O * « 1 j N N r, I ro I O D mzyAO a z r-i+ �mtaz O ot,$mc0 Nu+ � MA�CHLI � 40+1-77 0 4 ZO = S.W- -� fN + f ` w CD s lm� z ul Rm1 +> AbD 2O N...W A I On c: Do + OG W N V ° 8 ca to I ieD$, Tp o I UmN I m NON I I � zro o `2 A D 0 �D IN m z z r -4 v mD 5 O I a ° mzF +mp?= c Omni uu+O m �o+ 14 m N Z i O y� N I o op.. m z mA 1 ^ 0 }o O� 1 D Z dIF ,n M Y.l°o o m +O CO, j O N �� Hoo iD co C;D �x gzZ mg ?fryvN V m O �m 0z cp NZr VONZ �O CG1 8N �NNA O Z Z V o o, Al m 14 R. 1 4 W ImI�11 {Zn D A z ooczi al^ I o, ro 8. z� f�D % < �ZZ � 1m� mZ, oOI M. pWDZ AO�oDDC 1 O(� (v Z OA =1 OA+mq I; 1 NV.2 .o VO m 1 1 .I CA V' cnuw 4 I I m rn I npUI1 � 41 Z o 1 1 I 1 III`( Q 1 O I ID g aI� Q I tF�O RI 4 mL. P m o m II t 1 I J !�— P.CI OJ uF 10 RtA„WS: MR[r: PLOT an: PWr sou, P. R SPMQ RI. .pS MW. CPS MO.— I:\RA008\RA008019 5-40-1999 O 12:10 V CD a u g SWP-27-2707 AS SHOWN -.M, °AnM !® CITY OF —7� RENTON Planning/Building/Public Works Dept. Gregg Zmmermon P.E.. Administrotor S.W. 27th STREET CULVERT REPLACEMENT PROJECT UTILITY RELOCATION ;,o, A, — Go I 0 ISSUED FOR BIDS 17 99 C-3 NO. REVISION BY DATE APPR ��a• PLAN AND PROFILES 1 1 w I v mUl I ' mz Wf ?5 ° w ° p 2c I I S2$a $ K R I _ �i~ A i. -fig= °z i c 2 $ z A 4 >Q I zN; I q ^'0 ����f=•I�y��y G i �N�1 3N�p�d.��0i $v12NZi� Z:ZO-Z K C ra tM'a > 1A C> , Rzhrc.z 2: R >8 Z92yog ° gg �N2 ti m D a z -0 1. 0 � 0 z .D 0 q MICA P to 7 �N rs No V M D Ln in- 10 AL 47a vn � 1 � 2 Mgt z 4� FN �AI O N A M Z H TI zl f m ° X r D m .; z N_ O 9"cl 0 p cxi w -- — N rnm i> z EL a c nlH g a pq Z o Tog 0M -ZM L�a€��IN IrjO i z� � V _ y a - Mr- m p od �p WHY OQ L' r•ZH �M m� �����LL��v�p �1�1 • �• 4i W Z J `� 130 1 Will 115 `1 R R = 55.00 - _ _ _ _ Brush - 90.00 00 Tall • _ Gras. , Tall Gras L = 86.39 s SEATTLE TIMES COMPANY 04 a' SEA LE TIMES COMPANY TEL ao - -- TEL EAVE Brush UTILITY R�LOCATtON NOTES-,` ----- - ES DAL Ln Brush A SD TEL , •_- M. Brush - a° RECON t�IECT EXlSTIP1G STDRM SEG. CB o NEW i?iPES ADD 'FITTINGS fi .4 g TELEPHONE TQ KRELOCATEp AS' �+ CB -12_ REQUIRED,: c' IN �ERSECTION � RECONNECT EXISTING WATERM 8+00 STA. M60+ 19. 19 NEW PIPES AND FITTINGSM5 +00 APPROX. LIMITS OF /7(�) •.• •••,;•:;•••;•;• ,• --- EXCAVATION (TYP) 2 f 5 RELOCATE EXISTING :GAS LINE • ................ . ..-... , .. 1' N REQUIRED 60+00 .•.... . . . . . . . . . . . .......................•.•.•.•.•.•.•............ ------ . c® � �APPROX. LIMITS OF RECONNECT EXISTING GAS LINE WITH 72" METRO � EXCAVATION(TYP) W NEW. PIPE$ AND FITTINGS _ 5 in, Brush 0 '�- C B am Q 8" S S / - y �--- 7 2 'J 10 . / - 8„ SS _ 11 F=__1 � � / Brush s 13 t Brush -77 --- -- _ , - - R - .- 55 00 • R55.00 B LINGTO NORTHERN RAILROAQ90.00,00 �s M k Brush ►� 0 90°00 0 / E3N F�4E __ PLAt' S c.2 T 20 60 }' SCALE 1 = 20 / I J g9i 30' 3 0 t - - ao ' "�'"••"" , rush .. .. B 4 I �1AN SCALE IN FEET (1 "=20') } 4* FOR UTILITY LOCATIONS IN KING COUNTY, CALL 1-800-424-8§55 BEFQRE CONTRACTOR WARNINGI t�v eAot�wo nurY LOC Wmf AM ---- — -- 130 . xrwA ME oNMAr MALL � VER Y ALL Un rY LOCA 8 r0 AA/E ANY COINIUL C Z Uj 3 z Z M �n a Z CQ� = M Uj Q CENTERLINl -OF ROAp Z CENTERLINE OF PIPELINE ~ �z X 0 , s W ♦ '2 � • f� 115 H- r 110 W z _ U m i— `j o� - 1 00 04 aCe 10 " SS ® 0.048% N c I CALES H RZ. 1" 2 a VE T. 1 " 5' >_ 58+00+QQ 60+00 Al REVISED TO REFLECT KWG COUNTY CONSTRUCTION RECORDS 7/96 NO: REVISION BY DATE ' ?,� ?. .4 1 .4 1 • See original file copies for submittal anc approval signatures, and or engineer's professi n I seal .�IENGR: r } lul ` Y di Aa. i kv A G p n 4 ,