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HomeMy WebLinkAboutSWP272274(1) i -ZT p zz- Short Plat (SKPL# REQUEST FOR PROJECT , Prelim_ Plat (PP# CAGE' i To: Technical Services Date WOg Green# From: Plan Review/Pro ect Manager i✓�� `�" J g J Project Name C T ��(� + ► {(' (70 characters max) Description of Project: fa� Vic? c2-LA L U-� ti>i✓ �� t_ooP Circle Size of Waterline: 8" 101, 12" Circle One: New or Extension �;� { tC Circle Size of Sewerline: V 101, 12" Circle One: New or 1.Ex n < Circle Size of Stormline: 12" 15" 18" PY� 24" Circle One: New or Ion 0 rV S , ©mil 1 Address or Street.Name(s) Dvlpr/Contractor/Owner/Cnslt: �� , , . '/;`,/l; k` f t? �c� y j� �o I�/f v, 5��p h ec 6a�e, (70 dmractcrs max) � VVl'o , Gam, z,� � z -7 / S- Check each discipline involved in Project Ltr Drwg # of sheets per discipline Trans-Storm i�-a� (Roadway/Drainage) (offsite improvementsxinclude basin name) (include TESC sheets) Transportation (Signaliution, Gtannelizati Lighting) Wastewater 'Private (Sanitary Sewer Main)(include basin name) L a 6,F S yi ie , 41-fe V&hle,f, Water (Mains,Valves,Hydrants) (Include composite&Horizontal Ctrl Sheets) TS Use Only "I0 o ��� -oL I RU- Z41 (z>LUP— r� S- c�,�,7y t) - a-�-7Lf Approved by TSM Date: Conns/misc/92-090.DOC/CD/bh r q� WHEN RECORDED RETURN TO: WETLANDS PRESERVATION pro�eet: AL,I III 1heater Office of the City Clerk pID_ 125360-0030 Renton Municipal Building AND MONITORING EASEMENT 200 Mill Avenue South Grantor7imothy Reed,;VP Renton,WA 98055 sTR: Sec. 30 & .31-23-5 Street Intersection: E. Valley Hwy & SW 41st Street Grantor, EASTGATE THEATRE, INC. and ; [plosse print or type Grantors)Na (s)) and , for and in consideration of mutual benefits hereby grants and conveys to the City of Renton, a Municipal Corporation, Grantee herein, an easement for the purpose of monitoring wetland areas, including the right of ingress and egress, over, across, and through the following described real estate situated in the County of King, State of Washington: See Attached Exhibit "A" for Legal Description 0ITY OF RENTON � r M rn r>7 —0 n SEP 3 0 1996 _ c� rn a >- 4? �D �i M IN WITNESS WHEREOF, this instrument is executed this��day of 19?4,��,o ��_,,,� �,� � C� Appro ed and Accept By: (,,) City of R nton BY: Its: Mayor City derk �1� ,�vrrrAt. 3 PROPERTY MGMT. *IMUAL FORM OF ACKNOWLEDGMENT STA OF ) SS COUNTY OF u.L4 I c ify that I know or have s tory evidence thath _ is the person who appeared before me, and s 'd person acknowledged that(he/s ' ed this instrument and acknowledged it to be(his/her) free and voluntary act for to uses and purposes mentioned in the instru i Dated _1 Notar Public in and for the State Or'FC1FwSEAL ,���r n�, of residing at ;"' O� (✓ 5 C7' NO iY P�i'LiQ-ORSGON Notary (print): S rolbi A Vn Or fR W 4- CCM69L,"i0 I o.C:i31 es My appointment expires: Ct i�QA:� � �.C2oa My COMMIssIOM 1f3ES APR,L 17,zaX �— REPRESENTATIVE FORM OF ACKNOWLEDGMENT STATE OF WASHINGTON ) ) SS COUNTY OF KING ) I certify that I know or have satisfactory evidence that signed this instrument, on oath stated that he/she/they was/were authorized to execute the instrument and acknowledged it as the of to be the free and voluntary act of such party/parties for the uses and purposes mentioned in the instrument. Dated Notary Public in and for the State of Washington residing at Notary (print): My appointment expires: CORPORATE FORM OF ACKNOWLEDGMENT: STATE O N dMF0 ) COUNTY OF.7INC�— M u.,i1 0SS On this (Q day of ¢ h b , 19'7(p , before me personally appeared 1 In to me known to be \,�c� � � _of the corporation that executed the withininstrument, and acknowledge the said instrument to"be the free and voluntary act and deed of said corporation, for the uses and purposes therein mentioned, and each on oath stated that he/she was authorized to execute said instrument and that the seal affixed is the corporate seal of said corporation. mm SAPID-RAR VVNITE Notary Public in and for the State of*A� 6 0•� It- C OF` C �D�A d -U ,d Notary (Print) rn 1�(� L 41� `!�.Gbos7G'SEXPIRES 17,200o My appointment expires p`�c Q 17 �ooa Horton Dennis &Associates, Inc. ti G HDAjw , Consulting Engineers, Planners & Surveyors ° 9 fMe EXHIBIT A LAN9 WETLAND AREAS EMM 9/2Z/ T7 LEGAL DESCRIPTION THOSE PORTIONS OF LOT 3, CITY OF RENTON LOT LINE ADJUSTMENT AS RECORDED IN VOLUME 106 OF SURVEYS AT PAGE 180 UNDER RECORDING NO. 9511299006 RECORDS OF KING COUNTY, WASHINGTON, BEING MORE PARTICULARLY DESCRIBED AS FOLLOWS: PARCEL "A": COMMENCING AT THE NORTHWEST CORNER OF SAID LOT 3; THENCE SOUTH 01 050'09" WEST 30.00 FEET ALONG THE WEST LINE OF SAID LOT 3 TO THE POINT OF BEGINNING; THENCE SOUTH 88009'51" EAST 90.15 FEET; THENCE SOUTH 01050'09" WEST 155.00 FEET; THENCE NORTH 88009'51" WEST 101.41 FEET TO A POINT ON SAID WEST LINE AND POINT "A"; THENCE ALONG SAID WEST LINE NORTH 28033'51" EAST 25.04 FEET; THENCE CONTINUING ALONG SAID WEST LINE NORTH 01 050'09" EAST 132.63 FEET TO THE POINT OF BEGINNING. ryi PARCEL "B": ?r ALSO COMMENCING AT THE ABOVE DESCRIBED POINT "A"; THENCE ALONG SAID WEST LINE OF LOT 3, SOUTH 28033'51" WEST 56.94 FEET TO THE POINT OF BEGINNING; THENCE SOUTH 88009'51" EAST 54.20 FEET TO POINT "B"; THENCE SOUTH 01050'09" WEST 104.55 FEET; THENCE SOUTH 43009'51" EAST 38.68 FEET; THENCE NORTH 88009'51" WEST 118.04 FEET; THENCE NORTH 01 050'09" EAST 3.85 FEET; THENCE NORTH 28033'51" EAST 51.95 FEET; THENCE NORTH 01050'09" EAST 55.59 FEET TO A POINT ON SAID WEST LINE; THENCE ALONG SAID WEST LINE NORTH 28033'51" EAST 29.19 FEET TO THE POINT OF BEGINNING. PARCEL "C": ALSO COMMENCING AT THE ABOVE DESCRIBED POINT "B"; THENCE SOUTH 88009'51" EAST 40.00 FEET TO THE POINT OF BEGINNING; THENCE NORTH 01050'09" EAST 6.00 FEET; THENCE SOUTH 88009'51" EAST 32.82 FEET; THENCE SOUTH 01°50'09" WEST 97.90 FEET; THENCE NORTH 88°09'51"WEST 32.82 FEET; THENCE NORTH 01 050'09" EAST 91.90 FEET TO THE POINT OF BEGINNING. ALL THE ABOVE LOCATED IN SECTIONS 30 AND 31, TOWNSHIP 23 NORTH, RANGE 5 EAST, WILLAMETTE MERIDIAN, KING COUNTY, WASHINGTON. 320 Second Avenue South, Kirkland, Washington 98033, Phone (206) 822-2525, Fax (206) 822-8758 Kirkland 0 Wenatchee 9 Burien ------------------------------------------------------- ---------------- EXISTING BERM i d EX 4 o.: i EXISTING WETLANE*EA AND TV NOI'50*09"E EXISTING BERM N88*09'51"W 20_ 18 LL 11L N D/ / /j j Al L ARCEL d alp. 0 ul) 0 25' WETLAND BUFFER / �/�/ ,j I N S28*33'51"W-218.70'- U. 15.00 —13,00 ACCESS TO WATER QUALITY POND— 11.0 10.00 SEE DETAIL, SHEET 9 N016.00,*50'09"E WATER QUALITY POND NO. 3 J N88'09'51"W 40.00' FILTER FABRIC FENCE--,, E N8 *09*51'W 54.20' 32.82' 91.90' 01 o O a �i � N v PROPOSED DETENTION BASIN SEE STORM DRAIN PLAN C! C! LOT T 01", C E L EO/� 04 SFI 2Z KNIM40 OTTIM FLAW FOR 51 BUIRLEMS20H 32.82' 1301? I9®e Ind - og .� N01*50"09"E I EX. 30' ACCESS EASEMENT .00 15.00- 10.00 11.00 x'o p QG 41 A = 52"12'09" C) R = 120.00' WATER QUALITY POND NO. I T = 58.79' I 13.00 L = 109.33' T-a—0- 01 17.50 5' CONIC. SIDEWALK:;::�. o 7 77, 16 Lo 6 =F= 78 6+47.87 an F�n ss�'E--- __177Z—-- -------------- ----—----- y SITE AREA TRIBUTARY TO HOME BASE DETENTION BASIN SITE AREA TRIBUTARY TO HOME BASE DETENTION BASIN AREA O 15 ACRES • I III} AREA = 0.11 ACRES IIAT o OFF SOARER TRIBUTARY TO BASIN a N a W BIINaoaNG SITE FLAN FOR mUmII.aN¢aT®N N®a3amIRN AREA = 0.002 ACRES ESP NO.Oa4-Be R y ENSTNG BERM I I I DRAINAGE DIVIDE 586n9's1•E-a75.52 IXEx C9 T MSTINC WETLAND AREA E105nNC � Ir xi � .o OxYO CONCRETE PAD CB N0.26 CB 110.27 CNO. •W •',�-i�T,• • �' iz•P SD II'-uNvvc SD w 93'-,2"PVC 5D w w E%.12"o '�1'At6R1�At.., ', •.,�t,•• ,'y• .'�`. q• E%15TNC BERM ',2-V't[e0C 6D• N 'CB •� LOT 7 OUIFALL N0.25A �- W BINDING SITE FLAN FOR \ - - - - 20 a CBMH Tif Rep NO.014-�m SDCO N0.37 e' •PVC so +s)t °)""' o 50x ]?• ZO Z 129'-IXUss unEo _'--,e 37 sb H SMA(E O 0.4)x / DRAINS ORx I 1 y0 ll ( p1 W is DRAINAGE DIVIDE I 27•-8'PVC 5D6Z22x / t p a +Z 1 CB NO.29 8 6 3 49 I ! f� OUTFALL N0.24C 2sp� Q } 6I II PROP°SFD EARTH 9ERM 2 PVC 5° � BYPASS AREA = 0.45 ACRES Y TOP-1750 CB N0. 4B SDCO NO,37 (/ 25'WERAND BDEFER INTAKE NO.24E u+ '� o \ CB 0.3 528'JJ'61•W-2t8.)D' ly 182'-12"PYC SD 11 e'-12•PVC SD 145'-1•PVC SD•1.59x E%CB _ 1 >e'-4•vvc m e 2.05x 12 I 6 W 39TH 7VC SD CB $ NO.31 1T-12�rw SD WA rn 5 Tp1 DUALITY POND ND.3 OUTFALL NO. 24D CB NO.24 1 INTAKE NO.4H LF OUTFALL NO,24A QQQ r, (( ,,y �.• • au +[oo I. µ d �. a r w Ix• 41Yyp- 5'12•PVC S OUTFALL NO.4G (v D DRAIN) ' v� a iii li[Y•r� STREET�� � , J'_ BYPASS AREA = 0.04 ACRES } SDCO N0. 36 S"CP SD % C NN CT1 �j'� �- a .• ....., � t�1GHT TO BE RELOCAD I IED.STNFET T acry /e i � O , ,2•PVC SD 118',2VC"P SD / ac. WA DUAI)tt 143'-ptA,SS-UNED Q 1 P 2\ OUT-FALL' -0;.52x INTAKE N0. 4F / CB NO.2 V-12"PVCUTF N A m 1 C N0.14 (POND 'CB D�9OUF RN O z 15•PVC SD `D% _B P C SD O 2.00x p 19'-8---5°(PIXID MAN) ♦ 1 M1O / d W 15•PVC SD(OVFAFLOW� (/(�' P" \ F, WA1ER DUAUtt POND NO.1 SDCO N0.34 RIM NO. 33 V 1 I r�-1 2-12 PVC SD (tY[-•1 ,Vo EK CB c 91'-12"PVC SD I I6 zo \\\`wll De 4z•-lzvvc SD _, 20 (Ifn 80'-I•PVC 50 I 45'-e'PVC 50 a 2wx CB N0. 10 "O B 11 N0. t I 1! 42'-12"CP 51) )B 198'-12"PVC SD V41- C -16�_� 16 480D0'25'6� O EX CB(((NH gq• y _��� le WIC �.`.__ 18 , 18 - l• CB NO,4 � a RZ H1w,MT 1 T-12'PVC SD �FC yb 1 N W CB N0.fi e INTAKE N0.10A CB N0.9 INTAKE NO.4B CB NO.7 e / CB NO. 18 CB N0,4A CB NO.5 169'-,'PVC ID P' t�so & V � 1°n px•E-q AccEss To wATEe auAutt P°ND -� 1 INTAKE N0.4D SEE DETAIL,b EET 9 NO1'S0'12'E-20.00' �_ 18 _10 15'-12'PVC SD I80'-iz•PYC SD CB NO. 78 o 1e INTAKE NO.18A INTAKE NO. 4C e;ee-3''°7"r-166 sT NW3T3)'w te6.?)' 0 EX. ONE STORY CONCRETE BUILDING -�----- -- -- NP _ aw BYPASS AREA = 0.07 ACRES 4 ° DEVELOPED OFF SITE AREA BYPASSING BASIN = 0.25 ACRES i 60'-t YPYC SD DRAINAGE DIVIDE OFF SITE AREA TRIBUTARY TO BASIN I \ _ 8 AREA = 0.005 ACRES ° �N I �a Du xxrwP eo'-1 vc sD � � 84DW4 1 I n l I E%Q ATfR MH TOTAL AREA OF PROJECT SITE:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12.28 ACRES LESS BYPASS AREA . . . . . . . . . . . . 0.60 ACRES LESS BYPASS AREA TRIBUTARY TO HOME BASE DETENTION BASIN. 0.26 ACRES ° +18.86 8`mow gee 3)'0 E-105.6Y o- °� EX CBNH TOTAL AREA OF PROJECT SITE TRIBUTARY TO DETENTION BASIN . . . . . . . . . . . . 11.42 ACRES PLUS OFFSITE WETLAND MITIGATION AREA. . . . . . . . . . . . . . . . . . . 0.28 ACRES - - PLUS OFFSITE AREAS (HOME BASE AND EX. WAREHOUSE). . . . . . . . . . . 0.01 ACRES LOT 6 (BSP 014-92) wlN[ S88'49'45'W-39.11' [�wP.NT„N.[ -� PLUS AREA OF LOTS 4 AND 6 (BSP 014-92) TRIBUTARY TO DETENTION BASIN. . . . 1.52 ACRES AREA 076 ACRES DRAINAGE AREA MAP TOTAL AREA TRIBUTARY TO DETENTION BASIN. . . . . . . . . . . . . . . . . . . . . . . . .13.23 ACRES = . �'"�„roR BYPASS AREA = 0.04 ACRES FOR LOT 4 (BSP 014-92) ACT Iil THEATERS S. W. 41 S T STREET AREA = 0.76 ACRES SCALE: 1" ■ 100' SITE AREA TRIBUTARY TO HOME BASE DETENTION BASIN SITE AREA TRIBUTARY TO HOME BASE DETENTION BASIN AREA\ 0.15 ACRES AREA = 0.11 ACRES OFF SIIKREA TRIBUTARY TO BASIN ®a>o a IBIISNIDIIFT43®II7CI9 ffII.E1RT IC®8 8U8IIeII1J¢87P0Y3 8®8q°ffiIDBPd AREA = 0.002 ACRES D 1901?me.oIl4-as 7CSII®7CII8@�]H®![i BOBrm I_u DRAINAGE DIVIDE ai S88'09'S1'E-875.52 SRNC WEIUND AREA Ew511NG CONCRETE PAD CB N0.26 CB N0.27 C � �• 8�01M�i • • w w W EX 1Y eiM(4/!•• . . • ' •'� ♦�• •> 1YPNC 5D 11'-12•PVC SD 9]'-i x'PVC SD . �. Ew511NG BERM •••��e�,•�• • r '.�• '�••' •5 .�' E%C6 IL®°1C T I OUTFALL NO.23A .f- 1 -�20 u'u�,rq 1 EXwCBNN ]BiJBII°IIY307C®P3 7d®89Cffi�BFd � � .�{��--y(� z 1a�• [' 38F 390.M4-9% SDCO NO.37 6• 35 .,..1' I �' sailC+r(7 .,.. a eos 6,•,1Z°4o •� Z I SWAL GRASS-L NED -i6 OC 37 SWALE a 0.47% 2-B'PVC ROOF 1 1 _Ir ®N r DRAWS a 2.00% LLJ it DRAINAGE DIVIDE 2T-ePVC .822% U 0 8 pppyyy $y Z 1q'1.�-�tI CB N0. 3 C tlif p '3 I OUTFALL N0.24C -i f "(, "!{ S) '• �'a S..„•1 Q PROPOBFD EAR 6FAN "'-,YPVD BD BYPASS AREA = 0.45 ACRES h`� i0P 17.50 CB N0. 4B SDCO N0.37 t ' I INTAKE N0.24E / 51 26'neTUND BuftER 3 j!' \ t CB 0.3 r're;ii nr h s]A'33'at'w-2/e.)o• j •~. 162'-12'PVC 5D u6'-u'Pvc 90 Iu'-arovc m a Taflx SW 39THrz'CB ' CB NO,3 � I � x.w•q ez caw s 't 0 I / ex ` �R/v tvc 17-12 OC SO WATER WAIIIY POND N0.3 OUTFALL N0.24D fimm 09 NO.24 y 8 •4 a amea wDu - Ill e � 1p a asm / I 1 INTAKE N0.4H OUTFALL N0. 4A i,An n Al s YY �an } 4. I 1S1 aY E OUTFACE N0.40 ( D DRNN) •A „ �i STREETS BYPASS AREA = 0.04 ACRES 1 �j D N 36 J-15'CP N <.� f LIGCONCRETE ELOITD 51RFET N aN �111111 LIGHT TO BE RO.00ITED. , '-12'PVC SO N6'-1�roVC SO / ul WA WAIJtt 113'-GRASS-DNED O / d Q _ NIz 0.2 SWAIF a 0.52% 4 12 I \� INTAKE NO.4F CB N0.2 4 n'-1YPvc so R 25'-12'PVC SD CS N0, N 1 NO 14 (POND DRAIN) ` I a #, 5 3 D' � ' I� OUTALL2-e'POC ROOF ' p J B '� I I'v 16'PVC 5o OUTFALL NO.4E DRAWS a z00% ; / 8 W 16 19'-e'm SD(POND DRAN) �O (\\�`� 0 d g I6'-15'PV0 SO(OIWLOW) 29•-e'P1C eD a z.00% ✓f EI t{ 13 I R WATER OUAUtt POND NO.1 SDCO N0.34 SD 0 N V 1 - . i INV IS.50 • I e<tY a-w 1e ^ 1e� (' �y�Tr" EX.C9 '- 162'12'P\C SD lie'1 SO N 91 12'PVC SO ` OR az-lYPvc s0 __ ao I -- •s'-erovc SO aoox .L• 42'-ITCP SD IB IN'-12'PVC 9D 1141 N0.10 tA��NG CB N0.11 989'05'25=384.21 v� 16 -16� N8BV525�"� O -1e aq caw �- 16 to w2r / ) I CB N0.4 unlr�AyT ex,w IT-IYPVC SD \�S)� R W I CB NO.6 CB C NO. INTAK NO.10A 6 °C 1 INTAKE N0.48 N0.7 I e OB NO.18 C 2,: NO,4A co NO.5 16fl'-72'M so P so h '! Ir,s�v -s1 } ACCESS To WATER awn POND +1 T3•-11 I-- P L M INTAKE NO.4D SEE DETAR,MEET B Noi So'1YE-2o.00' •`1 1e =1B~ 15'-1YPVC 50 Ie°'-tYPVC SO 9 CB NO.78 501'50'YW-fl 16.))' 1e INTAKE N0.18A RY w is}{r¢) INTAKE NO.4C NDB'3 '�7 wtaB.P,7 EX. ONE STORY CONCRETE BUILDING �1- II 07 ACRES i (R DEVELOPED OFF SITE AREA BYPASSING BASIN = 0.25 ACRES BYPASS AREA = 0. 'SO.-SO DRAINAGE DIVIDE OFF SITE AREA TRIBUTARY TO BASIN \ AREA = 0.005 ACRESE:,:. Tau 9 � V:4 la \ NW W sop%r.oa4.9r, I � F +�®:�NOD.sas-9•i i TOTAL AREA OF PROJECT SITE:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12.28 ACRES I 1 " LESS BYPASS AREA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.60 ACRES LESS BYPASS AREA TRIBUTARY TO HOME BASE DETENTION BASIN. . . . . 0.26 ACRES 586'37'OYE 16.66' 6_ SeB J>'D -105.67 s+- xe EX CBMN TOTAL AREA OF PROJECT SITE TRIBUTARY TO DETENTION BASIN . . . . . . . . . . . . 11.42 ACRES "°°"�� o-� -- <. �� ��,,,,� PLUS OFFSITE WETLAND MITIGATION AREA. . . . . . . . . . . . . . . . . . . . . . . . . . . 0.28 ACRES - PLUS OFFSITE AREAS (HOME BASE AND EX. WAREHOUSE). . 0.01 ACRES ¢ V eR•N.,.E b S"°'"` W79 PLUS AREA OF LOTS 4 AND 6 (BSP 014-92) TRIBUTARY TO DETENTION BASIN. . . . 1.52 ACRES LOT 6 (BSP 014-92) DRAINAGE AREA MAP TOTAL AREA TRIBUTARY TO DETENTION BASIN. . . . . . . . . . . . . . . . . . . . . . . 13.23 ACRES AREA = 0.76 ACRES EY.FA M1DRNlt BYPASS AREA = 0.04 ACRES FOR LOT 4 (BSP 014-92) ACT III THEATERS S. W. 41 S T STREET AREA = 0.76 ACRES SCALE: 1" = 100' r o HDA File No. 9566.00 DRAINAGE CALCULATIONS FOR ACT III THEATRES CITY OF RENTON, WASHINGTON Prepared By: Bryant O. Mercil, P.E. HORTON DENNIS & ASSOCIATES, INC. 320 Second Avenue South 4S�F w Kirkland, Washington 98033-6687 Phone: (206) 822-2525 ��'� z� Fax: (206) 822-8758 `� o a 'A 27991 May 15, 1995 �'GIS�SEtF' Revised July 14, 1996 L E� 81SM6 Revised August 8, 1996 EXPIRES 6/27 f TABLE OF CONTENTS Introduction: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Summary of Results: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Basin Summaries: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Detention Basin Design Data: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Water Quality: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Drainage Area Map: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 INTRODUCTION The following computations present the preliminary design of a stormwater detention system for the proposed Act III Theater Facility. The proposed 12.28 acre development, comprised of a 56,896 square foot theatre with 13 screens and 3,584 seats, is located on the west side of East Valley Highway, north of SW 41 st Street in the City of Renton. EXISTING DRAINAGE CONDITIONS The project site is presently a vacant parcel (Lot 3 of the Northern Railroad Binding Site Plan No. 014-92). The parcel was filled approximately 18 years ago. The existing ground cover consists mainly of grasses in poor condition over the fill material. The western portion of the parcel has several low areas identified during early project review as wetland areas with low functional values. The site generally drains from east to west to the wetland areas at an average slope of 0.25 percent. The runoff curve number and time of concentration for the pre developed condition were obtained from the preliminary drainage calculations, prepared by Bush, Roed and Hitchings in support of the site plan application for the Pace warehouse development (SP-005-92). A copy of the preliminary calculations has been provided at the end of this report. PROPOSED DRAINAGE CONDITIONS Runoff from the parking area in front of the proposed building will be conveyed in a storm drain pipe system to a grass-lined swale in the proposed wetland buffer at the rear of the building. The swale has been designed with a flat slope to promote water quality through ponding prior to discharge into the detention basin. The swale will outfall into the first of three water quality ponds. These ponds have been designed using the methodologies for a combined water quality / detention basin as outlined in the 1992 edition of the King County Stormwater Management (SWM) Manual. While the above mentioned grass lined swale will provide some water quality benefits, site constraints precluded the design of a bio-filtration swale meeting the requirements of the King County SWM Manual. To compensate for use of a smaller swale, additional storage has been provided in the proposed water quality ponds. Additional water quality storage has also been provided to compensate for paved areas downstream of the proposed facility. Calculations for pond surface area and volume are detailed on page 13 of this report. 1 The proposed detention basin has been designed to maximize the volume available for storage of excess storm water runoff while maintaining the hydrology of the existing and proposed wetland areas. The detention basin has been designed to release flows at or below the pre developed_rates for the 2, 10, and 100 year storms per city of Renton standards. Detention storage has also been provided for development of Lots 4 and 6 of the Burlington Northern Binding Site Plan (BSP 014- 92), immediately south of the project site. The boundaries of the proposed drainage area tributary to the detention facility as well as limits of the bypass and off site areas are delineated on the drainage area map at the end of this report. The "Waterworks" program with the Santa Barbara Unit Hydrograph(SBUH)method and King County rainfall distribution (USER 1) was used in the design of the proposed facility. Control in the detention system will be provided by the following set inside of a 54 inch diameter catch basin manhole. • A 1 inch diameter orifice with an outlet elevation of 10.87 • A 3.5 inch diameter orifice with an outlet elevation of 15.00 • A 6 inch diameter elbow with an outlet elevation of 15.50 • An 15 inch diameter restrictor with an overflow elevation of 16.50 The control structure will discharge to a 15-inch storm drain pipe. The storm drain pipe will extend approximately 450 feet west to a connection with an existing 60-inch storm drain pipe on the west side of Lind Avenue. The 60-inch storm drain pipe continues approximately 1300 feet north, then 1,000 feet east to an outfall in Springbrook Creek. 2 SUMMARY OF RESULTS PROPOSED DETENTION SYSTEM Total Area of Project Site: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.28 Acres Less Bypass Area: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.60 Acres Less Bypass Area Tributary to Home Base Detention Basin: . . . . . . . . . . . . . . . . . . . 0.26 Acres Total Area of Project Site Tributary to Detention Basin: . . . . . . . . . . . . . . . . . . . . . 11.42 Acres Plus Offsite Wetland Mitigation Area: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.28 Acres Plus Offsite Areas (Home Base and Ex. Warehouse): . . . . . . . . . . . . . . . . . . . . . . . . . 0.01 Acres Plus Area of Lots 4 and 6 (BSP 014-92) Tributary to Detention Basin: . . . . . . . . . . . 1.52 Acres Total Area Tributary to Detention Basin: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.23 Acres 1 YEAR STORM (WATER QUALITY) Peak Discharge for Pre Developed Conditions: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . N/A Peak Inflow to Basin: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.17 cfs Proposed Release Rate: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.05cfs Design Water Surface Elevation: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.01 Approximate Volume of Storage Provided: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14,800 cf 2 YEAR STORM Peak Discharge for Pre Developed Conditions: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.66 cfs Peak Inflow to Basin: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.53 cfs Proposed Release Rate: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.55 cfs Design Water Surface Elevation: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15.61 Approximate Volume of Storage Provided: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52,800 cf 10 YEAR STORM Peak Discharge for Pre Developed Conditions: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.76 cfs Peak Inflow to Basin: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.94 cfs Proposed Release Rate: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.03 cfs Design Water Surface Elevation: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15.95 Volume of Storage Provided: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63,400 cf 100 YEAR STORM Peak Discharge for Pre Developed Conditions: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.28 cfs Peak Inflow to Basin: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.66 cfs Proposed Release Rate: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.37 cfs Design Water Surface Elevation: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.38 Volume of Storage Provided: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85,300 cf 3 SUMMARY OF RESULTS HISTORY OF HYDROGRAPH ACTIVITY Date of Session: 8/8/96 11: 12:34 am LPOOL 1 "WATER QUALITY STORM" B1-WQ-1 B1-WQ-1 S-4 D-4 1 Description MatchQ PeakQ Sto Dis PkStg OutQ hyd Volume WATER QUALITY STORM 0.00 1. 17 S-4 D-4 14.01 0. 05 1 14819.61 cf LPOOL 2 "2 YEAR STORM" B1-EX2 B1-DEV2 S-4 D-4 2 Description MatchQ PeakQ Sto Dis PkStg OutQ hyd Volume 2 YEAR STORM 0.66 4.53 S-4 D-4 15. 61 0.55 2 52822.37 cf LPOOL 3 "10 YEAR STORM" B1-EX10 B1-DEV10 S-4 D-4 3 Description MatchQ PeakQ Sto Dis PkStg OutQ hyd Volume 10 YEAR STORM 1.76 6. 94 S-4 D-4 15.95 1. 03 3 63440.51 cf LPOOL 4 "100 YEAR STORM" B1-EX100 B1-DE100 S-4 D-4 4 Description MatchQ PeakQ Sto Dis PkStg OutQ hyd Volume 100 YEAR STORM 3.28 9. 66 S-4 D-4 16.38 1.37 4 85360.08 cf 4 BASIN SUMMARIES 5 1 BASIN SUMMARIES PRE DEVELOPED CONDITIONS BASIN ID: B1-EX2 NAME: BASIN 1, EX. 2YR STORM SBUH METHODOLOGY TOTAL AREA. . . . . . . : 13.23 Acres BASEFLOWS: 0. 00 cfs RAINFALL TYPE. . . . : USER1 PERV IMP PRECIPITATION. . . . : 2. 00 inches AREA. . : 13.23 Acres 0.00 Acres TIME INTERVAL. . . . : 10.00 min CN. . . . : 81. 00 0.00 TC. . . . : 60.00 min 0.00 min ABSTRACTION COEFF: 0.20 PEAK RATE: 0.66 cfs VOL: 0.67 Ac-ft TIME: 520 min BASIN ID: B1-EX10 NAME: BASIN 1, EX. 10YR STORM SBUH METHODOLOGY TOTAL AREA. . . . . . . : 13.23 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE. . . . : USER1 PERV IMP PRECIPITATION. . . . : 2. 90 inches AREA. . : 13.23 Acres 0.00 Acres TIME INTERVAL. . . . : 10. 00 min CN. . . . : 81. 00 0.00 TC. . . . : 60.00 min 0. 00 min ABSTRACTION COEFF: 0.20 PEAK RATE: 1.76 cfs VOL: 1.36 Ac-ft TIME: 490 min BASIN ID: B1-EX100 NAME: BASIN 1, EX. 100YR STORM SBUH METHODOLOGY TOTAL AREA. . . . . . . : 13.23 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE. . . . : USER1 PERV IMP PRECIPITATION. . . . : 3. 90 inches AREA. . : 13.23 Acres 0. 00 Acres TIME INTERVAL. . . . : 10. 00 min CN. . . . : 81. 00 0.00 TC. . . . : 60.00 min 0. 00 min ABSTRACTION COEFF: 0.20 PEAK RATE: 3.28 cfs VOL: 2.25 Ac-ft TIME: 490 min 6 BASIN SUbMRIES POST DEVELOPED CONDITIONS BASIN ID: B1-WQ-1 NAME: BASIN 1, WATER QUALITY STORM SBUH METHODOLOGY TOTAL AREA. . . . . . . : 13.23 Acres BASEFLOWS: 0. 00 cfs RAINFALL TYPE. . . . : USER1 PERV IMP PRECIPITATION. . . . : 0.67 inches AREA. . : 2.87 Acres 10.36 Acres TIME INTERVAL. . . . : 10.00 min CN. . . . : 81.00 98.00 TC. . . . : 39.80 min 14. 85 min ABSTRACTION COEFF: 0.20 TcReach - Sheet L: 190.00 ns: 0.2400 p2yr: 2. 00 s: 0. 0100 impTcReach - Sheet L: 20.00 ns: 0.2400 p2yr: 2. 00 s: 0. 0200 impTcReach - Sheet L: 50.00 ns:0. 0110 p2yr: 2.00 s: 0. 0120 impTcReach - Channel L: 990.00 kc:42. 00 s:0.0038 impTcReach - Channel L: 165.00 kc: 17. 00 s:0. 0045 PEAK RATE: 1. 17 cfs VOL: 0.41 Ac-ft TIME: 480 min BASIN ID: B1-DEV2 NAME: BASIN 1, DEV. 2YR STORM SBUH METHODOLOGY TOTAL AREA. . . . . . . : 13.23 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE. . . . : USER1 PERV IMP PRECIPITATION. . . . : 2.00 inches AREA. . : 2. 87 Acres 10.36 Acres TIME INTERVAL. . . . : 10.00 min CN. . . . : 81.00 98.00 TC. . . . : 39.80 min 14.85 min ABSTRACTION COEFF: 0.20 TcReach - Sheet L: 190.00 ns:0.2400 p2yr: 2.00 s:0.0100 impTcReach - Sheet L: 20.00 ns: 0.2400 p2yr: 2. 00 s: 0. 0200 impTcReach - Sheet L: 50.00 ns:0. 0110 p2yr: 2. 00 s: 0. 0120 impTcReach - Channel L: 990.00 kc:42. 00 s:0.0038 impTcReach - Channel L: 165.00 kc:17.00 s:0.0045 PEAK RATE: 4.53 cfs VOL: 1. 68 Ac-ft TIME: 480 min BASIN ID: B1-DEV10 NAME: BASIN 1, DEV. 10YR STORM SBUH METHODOLOGY TOTAL AREA. . . . . . . : 13.23 Acres BASEFLOWS: 0. 00 cfs RAINFALL TYPE. . . . : USER1 PERV IMP PRECIPITATION. . . . : 2.90 inches AREA. . : 2.87 Acres 10.36 Acres TIME INTERVAL. . . . : 10.00 min CN. . . . : 81.00 98.00 TC. . . . : 39.80 min 14. 85 min ABSTRACTION COEFF: 0.20 TcReach - Sheet L: 190.00 ns:0.2400 p2yr: 2. 00 s: 0. 0100 impTcReach - Sheet L: 20.00 ns:0.2400 p2yr: 2.00 s: 0. 0200 impTcReach - Sheet L: 50.00 ns:0.0110 p2yr: 2.00 s: 0. 0120 impTcReach - Channel L: 990.00 kc:42.00 s: 0. 0038 impTcReach - Channel L: 165.00 kc: 17.00 s:0.0045 PEAK RATE: 6.94 cfs VOL: 2.60 Ac-ft TIME: 480 min 7 BASIN ID: B1-DE100 NAME: BASIN 1, DEV. 100 YR STORM SBUH METHODOLOGY TOTAL AREA. . . . . . . : 13.23 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE. . . . : USER1 PERV IMP PRECIPITATION. . . . : 3. 90 inches AREA. . : 2. 87 Acres 10.36 Acres TIME INTERVAL. . . . : 10.00 min CN. . . . : 81.00 98.00 TC. . . . : 39. 80 min 14.85 min ABSTRACTION COEFF: 0.20 TcReach - Sheet L: 190.00 ns:0.2400 p2yr: 2. 00 s:0. 0100 impTcReach - Sheet L: 20. 00 ns:0.2400 p2yr: 2.00 s: 0. 0200 impTcReach - Sheet L: 50.00 ns:0. 0110 p2yr: 2.00 s:0. 0120 impTcReach - Channel L: 990. 00 kc:42. 00 s:0. 0038 impTcReach - Channel L: 165. 00 kc:17.00 s:0.0045 PEAK RATE: 9. 66 cfs VOL: 3. 65 Ac-ft TIME: 480 min 8 DETENTION BASIN DESIGN DATA 9 • STAGE STORAGE TABLE CUSTOM STORAGE ID No. S-4 Description: PROPOSED DETENTION BASIN STAGE <----STORAGE----> STAGE <----STORAGE----> STAGE <----STORAGE----> STAGE <----STORAGE----> (ft) ---cf--- --Ac-Ft- (ft) ---cf--- --Ac-Ft- (ft) ---cf--- --Ac-Ft (ft) ---cf--- --Ac-Ft- 13.00 0.0000 0.0000 14.20 18550 0.4258 15.40 46350 1.0640 16.60 97350 2.2348 13.10 1470 0.0337 14.30 20475 0.4700 15.50 49450 1.1352 16.70 102750 2.3588 13.20 2940 0.0675 14.40 22400 0.5142 15.60 52550 1.2064 16.80 108150 2.4828 13.30 4410 0.1012 14.50 24325 0.5584 15.70 55650 1.2775 16.90 113550 2.6067 13.40 5880 0.1350 14.60 26250 0.6026 15.80 58750 1.3487 17.00 118950 2.7307 13.50 7350 0.1687 14.70 28175 0.6468 15.90 61850 1.4199 17.10 124350 2.8547 13.60 8820 0.2025 14.80 30100 0.6910 16.00 64950 1.4910 17.20 129750 2.9787 13.70 10290 0.2362 14.90 32025 0.7352 16.10 70350 1.6150 17.30 135150 3.1026 13.80 11760 0.2700 15.00 33950 0.7794 16.20 75750 1.7390 17.40 140550 3.2266 13.90 13230 0.3037 15.10 37050 0.8506 16.30 81150 1.8629 17.50 145950 3.3506 14.00 14700 0.3375 15.20 40150 0.9217 16.40 86550 1.9669 14.10 16625 0.3817 15.30 43250 0.9929 16.50 91950 2.1109 STAGE DISCHARGE TABLE MULTIPLE ORIFICE ID No. 0-4 (USED IN DEVELOPMENT OF STAGE-DISCHARGE LIST D-2) Description: CATCH BASIN NO. 4A Outlet Elev: 10.87 Elev: 8.87 ft Orifice Diameter: 1.0000 in. Elev: 15.00 ft Orifice 2 Diameter: 3.5000 in. Elev: 15.50 ft Orifice 3 Diameter: 6.0000 in. STAGE <--DISCHARGE---> STAGE <--DISCHARGE---> STAGE <--DISCHARGE---> STAGE <--DISCHARGE---> (ft) ---cfs-- ------- (ft) ---cfs-- ------- (ft) ---cfs-- ------- (ft) ---cfs-- ------- 10.87 0.0000 12.30 0.0325 13.80 0.0465 15.30 0.2392 10.90 0.0047 12.40 0.0336 13.90 0.0472 15.40 0.2680 11.00 0.0098 12.50 0.0346 14.00 0.0480 15.50 0.2935 11.10 0.0130 12.60 0.0357 14.10 0.0488 15.60 0.6255 11.20 0.0156 12.70 0.0367 14.20 0.0495 15.70 0.7747 11.30 0.0178 12.80 0.0377 14.30 0.0503 15.80 0.8927 11.40 0.0198 12.90 0.0387 14.40 0.0510 15.90 0.9941 11.50 0.0215 13.00 0.0396 14.50 0.0517 16.00 1.0847 11.60 0.0232 13.10 0.0405 14.60 0.0524 16.10 1.1674 11.70 0.0247 13.20 0.0414 14.70 0.0531 16.20 1.2442 11.80 0.0262 13.30 0.0423 14.80 0.0538 16.30 1.3161 11.90 0.0275 13.40 0.0432 14.90 0.0545 16.40 1.3839 12.00 0.0288 13.50 0.0440 15.00 0.0552 16.50 1.4485 12.10 0.0301 13.60 0.0448 15.10 0.1609 12.20 0.0313 13.70 0.0457 15.20 0.2051 STAGE DISCHARGE TABLE DISCHARGE LIST ID No. D-4 Description: CATCH BASIN NO. 4A STAGE <--DISCHARGE---> STAGE <--DISCHARGE---> STAGE <--DISCHARGE---> STAGE <--DISCHARGE---> (ft) ---cfs-- ------- (ft) ---cfs-- ------- (ft) ---cfs-- ------- (ft) ---cfs-- ------- 13.00 0.0000 13.90 0.0489 14.80 0.0580 15.70 0.7700 13.10 0.0400 14.00 0.0500 14.90 0.0590 15.80 0.8733 13.20 0.0411 14.10 0.0510 15.00 0.0600 15.90 0.9767 13.30 0.0422 14.20 0.0520 15.10 0.1200 16.00 1.0800 13.40 0.0433 14.30 0.0530 15.20 0.1800 16.10 1.1600 13.50 0.0444 14.40 0.0540 15.30 0.2400 16.20 1.2400 13.60 0.0456 14.50 0.0550 15.40 0.2650 16.30 1.3200 13.70 0.0467 14.60 0.0560 15.50 0.2900 16.40 1.3850 13.80 0.0478 14.70 0.0570 15.60 0.5300 16.50 1.4500 10 WATER QUALITY I1 WATER QUALITY Reference: King County Surface Water Design Manual BIOFILTRATION Section 1.2.3 Core Requirement No. 3 Threashold for Biofiltration: Maximum Allowable Impervious Area Subject to Vehicular Traffic, A imp: . . . . . . . . . . . . . . . . . . 5,000 SF Proposed Condition: Total Impervious Area Subject to Vehicular Traffic, Aimp: . . . . . . . . . . . . . . . . . . . . . . . . . . . . 290,400 SF Biofiltration is required. Because of constraints on site grading, the surface area proposed in the grass-lined swale outfall to the water quality ponds does not meet the design standards outlined in the manual. In order to compensate for the loss of biofiltration area, the proposed wetponds have been enlarged to provide additional surface area and storage volume. The calculations for the proposed wetponds are presented on the following page. 12 SPECIAL WATER QUALITY CONTROLS Section 1.3.5 Special Requirement No. 5 As outlined in the introduction, the proposed detention system outfalls to an existing storm drain pipe system in Lind Avenue for eventual discharge into Springbrook Creek, a Class 2 stream. Since the project site proposes discharge within a one mile radius of a Class 2 Stream, a wetpond is required. The engineering plans propose a three cell combination wetpond - detention basin. Since the surface area of the proposed grass lined swale could not meet the requirements outlined in the SWM Manual, additional surface area and storage volume has been proposed in the wetponds. As shown in the following calculations, the proposed wet ponds provide over four times the required wetpond surface area and over two time the required wetpond storage volume. This additional surface area and storage volume is intended to compensate for the limited surface area in the proposed grass lined swale. WETPOND DESIGN Required Water Surface Area, Awq: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3,496 SF Awq = One Percent of Impervious Area Impervious Area, Aimp: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 349,600 SF Act III Project: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 290,400 SF Lots 4 and 6 (BSP 014-92): . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50,000 SF Access Driveway to Lind Avenue: . . . . . . . . . . . . . . . . . . . . . . . . . 9,200 SF Proposed Water Surface Area, Awq: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11,900 SF Ratio of Proposed Water Surface Area to Required Water Surface Area: . . . . . . . . . . . . . . . . . . 3.40 Section 1.3.5(2) Storage Volume Required Storage Volume, Vwq: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17,775 CF Vwq = Total Volume of Runoff from the Mean Annual Storm Vwq=0.408 Acre-Feet x 43,560 (See Page 4 for Storm Routing) Total Drainage Area, A: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.48 Acres Act III Project: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.71 Acres Lots 4 and 6 (BSP 014-92): . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.52 Acres Access Driveway to Lind Avenue: . . . . . . . . . . . . . . . . . . . . . . . . 0.25 Acres Proposed Storage Volume, Vwq: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27,350 CF Ratio of Proposed Storage Volume to Required Storage Volume: . . . . . . . . . . . . . . . . . . . . . . . 1.54 The volume calculations for the proposed wetponds are presented on the following page. 13 • • 8/8/96 1:13 PM WATER QUALITY PONDS VOLUME CALCUALTIONS POND NO. 1 WS Area Avg. Area Depth Inc. Volume Total Volume Elevation Square Feet Square Feet Feet Cubic Feet Cubic Feet 10.00 3,500.00 0.00 3,850.00 1.00 3,850.00 11.00 4,200,00 3,850.00 5,050.00 2.00 10,100.00 13.00 5,900.00 113,950.00 POND NO. 2 WS Area Avg. Area Depth Inc. Volume Total Volume Elevation Square Feet Square Feet Feet Cubic Feet Cubic Feet 10.00 2,500.00 0.00 2,800.00 1.00 2,800.00 11.00 3,100.00 2,800.00 3,750.00 2.00 7,500.00 13.00 4,400.00 10,300.00 POND NO. 3 WS Area Avg. Area Depth Inc. Volume Total Volume Elevation Square Feet Square Feet Feet Cubic Feet Cubic Feet 10.00 600.00 0.00 700.00 1.00 700.00 11.00 800.00 700.00 1,200.00 2.00 2,400.00 13.00 1,600.00 1 13,100.00 Total Surface Area Provided:............................................................... ................ 11,900.00 Square Feet Total Volume Provided:........................................................................................ 27,350.00 Cubic Feet 14 WQSTOLXLS COALESCING PLATE OIL/WATER SEPARATORS Section 1.3.6 Special Requirement No. 6 Threashold for Coalescing Plate Oil/Water Separators Maximum Allowable Impervious Area Subject to Vehicular Traffic, A imp: . . . . . . . . . . . . . . . . . 5.00 Acres Maximum Number of Vehicle Trips Per Day: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,500 Trips Proposed Condition: Total Impervious Area Subject to Vehicular Traffic, Aimp: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.67 Acres Proposed Number of Vehicle Trips Per Day: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,272 Trips See page 15 of the Traffic Impact Analysis for the proposed theatre project (copy attached). 15 — 65/31/96 11:00 FAX 20674 3688 TRANSPO Group 2002 Traffic Impact Analysis for Act Ill's East VeNey Cinema December 15. 1995 Table 4. Project Trip Generation Daily Trips Peak Month Peak Month Peak Month Avg Month Size _ Mcn-Thur' Friday' Avg Weekday Avg Weekdays Cinema 3,584seats 1,900 2.903 2,100 1R72 Friday Peak Hour Trips Peak Month Peak Month PM Peak Hour Theater Peak Hour _ (4:30--5:3fi�m•); (74 p.m.), Size in Out Total in Out Total Cinema 3,584 seats 148 67 215 444 309 753 1 Based on average customertickei data from Ju•y f io 14, 1995. 2 Aojusled based on a weigrted average of Monday to Friday cunddrons. 3 Adusted based on average monthly ticket sales data witfr Jrdyticket sales reyrssenbing 13.75%o!the yearly sales. Project Trip Distribution and Assignment The trip distribution in the Pace Warehouse study were based on the travel fore- casting model developed by TRANSPO for the VaLleg Transportatirn Benefit Assessment Dis- trust analysis. To derive the trip distribution for the cinema project, the Pace Warehouse distribution was adjusted based on the traffic patterns associated with the surrounding street system and review of population and empioymcnt in and around the area. The resulting trip distribution for the Renton East Valley Cinema is shown on Figure 7. Forty(40) percent of the project traffic would be oriented to the north via Lind Avenue SW, E Valley Road, and SR 167, Another 15 percent would be oriented west via SW 43rd StreeL Approximately 35 percent would be oriented to areas south of the project site via E Valley Road and SR 167. The remaining 10 percent would be oriented to and from the east via SW 43rd Street. The project-generated trips were assigned to the vicinity street system based on the distribution pattern, local travel pattems in the area. and the location of project driveways, The resulting assignment is shown in Figure S. Sixty-eight(68) percent of the project traffic was assigned to the two driveways on E Valley Road, while 25 percent of the project traffic was assigned to the driveway on SW first Street:. The retaining 7 percent was assigned the proposed access driveway on Lind Avenue SW. Traffic Volumes The project-generated.traffic was added to the 1996 baseline traffic volumes without the project to Produce traffic volumes for 1996 with-project conditions during the weekday PM peak hour_ Additionally, since the proposed project would add an access road from the site to Lind Avenue SW, a redistribution of HomeBase trips was also incorporated into the 1996 with-project traffic conditions. The resulting weekday PM peak hour volumes are shown on Figure 9. A cornpanson of project traffic to total traffic at study area intersections is presented in Table 5, 95331.00/JLS195331Rf The TRAISPO Group,inc. Page 15 16 DRAINAGE AREA MAP 17 SITE AREA TRIBUTARY TO HOME BASE DETENTION BASIN SITE AREA TRIBUTARY TO HOME BASE DETENTION BASIN I I • � AREA - 0.15 ACRES AREA = 0.11 ACRES LOT a OFF SIisREA TRIBUTARY TO BASIN - BINDING SITE PLAN FOR BURLUNG}T®N NORTHERN AREA = 0.002 ACRES 88?No.Om-as R H$DDTUNGk HON3 HA81 U.FIRE HIDRANi R M I DRAINAGE DIVIDE ° f I nT I I I I I I I EXISTING BERM--L� 588b9'S1'E-875.52 IX[x ce T I I I E)US11NG WETLAND AREA I I 0GN P� (� CB N0.26 CB NO.27 SO ••' B.T • •> -12'PW SD ti'-12rPw:SD R 9J'-12'PVC SD < < E1112" •'(.'A1BR14A1N•• •, ••,'S.• ,• • ••q� q a EXJSTNC BERM ••zr-12 pdC'6o•'IB. �• W p •: �• •S• V 4 SLOT'a OUTFALL N0.25A' r- q •• •• -_ 20 ,n.(Yq W 33NDXNCF 67T3]PLAN IF®H 7S Lu D1RMMOT®N NORTHERN � '•J F; � � `'6�• IX°.9 ff s SDCO NO.37 ]®eF NO.GOIl4-at I. •`PVC 5D Z 1 mv---I"0- a Sox 2. SWAIE O 0.% / 2-0'PVC ROOF IB S7 ,5b W y DRAINAGE DIVIDE DRAWS C 2.00x RM .90 SEE PUIMBIN0 PUNS INV-1.20 20//'I(�II,\\ N Z 8 r FOR PA FO 2]'-8`PVC •2211L ; I IZ I R 2 CONCRETE U 8 4 EY CBMH CB N0, 29 OUTFALL N0.26Ci j ) C B d J IB TRICK LOADING FOR L •:.l - 6 d PROPOSED EARTH BERM t]'-12'PVC SD SEE AR°WTE°1URAL By[�, BYPASS AREA 0.45 ACRES Lf + TOP iJ 50 CB NO. 4B PUN FOR DETAILS SDOO NO.37 h f� RIM.21.40 (/ ZS'WE BUFFER \ CB O.32 49 WV-21.40 $ Fat Or M 526'JJ'et'W-21 e.]0' J ' 1484 162'-12"PVC SD 116'-12'PVC SD / 146'-47VC SO O 1.- SB ]B'-4^vvc sD a z.Dex -SW 39TH / /=A a b a Co SEE PLUMBING PUN FOR CONTNUARON ACCESS TO WATER WALITY PDND 6 ROOF GRAIN IN BULDWG 1I SEE DETAIL SHEET 9 I B °E cawf kgtDp n awu D.1 WATER QUALITY POND NO.3 -12'PVC SD 6TA:Oa30.16-21.t6'RT. 24 INTAKE NO.4N C11,7 •' 5n _z_ 4N I <,ar a+�s 1R I 2'-12'PVC S 1111€IY E ♦ PDND GRAN) ' FX.Ipyp- YJ. E n1 tb m OUTFALL N0.4G TFALL 0.24 t ..,f 1 SDCO NO 36 STREET"-, j °, BYPASS AREA = 0.04 ACRES rI d ~U s RIM 2200 LU.IGHT CONCRETE EPADLO LAND STREET ■r" 6D ` I „ Q tl'S / INV 1p.50 OCHi TO BE RFLOCtTED.x �Ilva�awM_ •t< '�' � � 5'CONC.SIDEWAL oK OaNALAI COi _ / f- I - SS �1 � t '-u'Pvc so ne'-t2'Pvc sD ' WATER WMlTS 131'-ORASS-UNED SEE ARCHITEMRAL PUNS �� / a 'PO\`\ POND N0.2 SWALE O;.5]x FOR DETAILS OF SIDEWAIJ( y�/ / QCB N0.2 \s6\ I]'-t2'PVC so \ JCB N ,2 .B INTAKE N0.4F SEE AI L11TECC TURIL I 25-12"PVC SD ' l SEE PRCNITEETU S a Z I I (POND CRAN) PLAN FOR OETNL6 hhd GRATIS COX SEE P V BIND PLAN 8 t FOR CD ATON a 2 +6 14'_t YPVD sD OUTFALL N0.4E - 1 W 19'-e"PVC SD((POND GRAIN)) 26'-8'PVC SD ta'-t5'PVC SD(0YII2PLo'AT SOLO NO.34 SO 0 N0. 33 • F+'1 11 WATER AUTY POND NO.1 RIM 21.90 RM'. WV 16A6 INV ' J , WA _ CB NO. 16 DL- tt6 �ti Q 91'-12'PVC 5D 182'-127VC 5D '-1'PVC 50 +r \ 42_12PVC `_ 20 / aeBIYM 60'-1'vvc sD _ a5'-B'PVC so a 2aox I CB NO. 10 � CB N0.11 42'-12'CP SD tB IBB'-12'PVC SD F t�2�Pyr; ,B 9e g L, 18 16 -- N89 25�Y.� OMH 16 _- ` 16— 6 IqB V W ,Pl�jy CB N0.4-- 17-12'PVC SD \I'C� Lu 4+10.00-10.16 RT'NO. CB N0.6 CB ND.9 150'-91ALLDw ALE a 1.00x B CB N0.7 INTAKE N 10A SEE DETAL e,,s�CWT 6 I INTAKE NO.4B 5+11 J6-11.19 RT. CB N0. y 4+43A8-54.60 T. 6+0281-11,19RT. p CBS B N0.4A 5+11.36-31.1 LT. / __..CO-LT CB NO.5 169'-1rPVC 50 1 P2-VC SD ACCESS TO WATER OUAUTY POND j3'_ 1 Y INTAKE NO.4D SEE DETAIL SHEET B NOV50'12'E-20.00' -- 16 1B_- IS'-12'PVC 50 60'-t2'vVC 5° < 8 4+50.]e-5ese LT. CS NO. 78 a le ujr Nf s01•eo'1Yw-9e.n• INTAKE N0.16A j}}�� pf 8+02.6J-J1.19'LT. INTAKE N0.4C Nae'S'OTr•-i66 s]' NSB'37;]w168.R1' 4+59.4B-48A4 LT. ,-I I F --.-- EX. ONE STORY CONCRETE BUILDING 1 SEE'---SSHDETALOW-S AB 11.00x BYPASS AREA = 0.07 ACRES aa. I I I i 0 DEVELOPED OFF SITE AREA BYPASSING BASIN = 0.25 ACRES i I I {6D._12.1VC SO -1B \ DRAINAGE DIVIDE OFF SITE AREA TRIBUTARY TO BASIN AREA = 0.005 ACRES I I I a II 180'-i VC m F / fll.TIRE NKRANI aa. TAW is I 31 •.GY!a � \ RAr,n � I W. n l E%WAIFA MM B I � I I •�,' � I I • ••� • V , I >3 TOTAL AREA OF PROJECT SITE:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12.28 ACRES I LESS BYPASS AREA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.60 ACRES LESS BYPASS AREA TRIBUTARY TO HOME BASE DETENTION BASIN. . . . . . . . . . . 0.26 ACRES 15, 6eB 3]o]'E 16.66 �19_ 6ee 370 E-IOSBY o- >r �� F%CBNH TOTAL AREA OF PROJECT SITE TRIBUTARY TO DETENTION BASIN . . . . . . . . . . . . 11.42 ACRES "°"°♦°"R" - f- FM , o- 6 e.:f It*pi PLUS OFFSITE WETLAND MITIGATION AREA. . . . . . . . . . . . . . . . . . . . . . . . . 0.28 ACRES ®_ - PLUS OFFSITE AREAS (HOME BASE AND EX. WAREHOUSE). . . . . . . 0.01 ACRES �- ,9�„IW MIT4WPL b S6B'49'45•W-39.11' PLUS AREA OF LOTS 4 AND 6 (BSP 014-92) TRIBUTARY TO DETENTION BASIN. . . . 1.52 ACRES LOT 6 (BSP 014-92) DRAINAGE AREA MAP TOTAL AREA TRIBUTARY TO DETENTION BASIN. . . . . . . . . . . . . . . . . . . . . . . '13.23 ACRES AREA = 0.76 ACRES �,ao;,Y�Na, 4 FRE XWP.WI BYPASS AREA = 0.04 ACRES FOR LOT 4 (BSP 014-92) ACT 111 THEATERS S. W. 41 S T STREET AREA = 0.76 ACRES SCALE: 1' • 100'