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HomeMy WebLinkAbout02932 - Technical Information Report, _ _ _ _____ • ac o lme l �S iN� 27 2 �� 2 Renton, Washington Technicallnformation Report Prepared For: Accord, Inc. G �,.� � Prepared By: �`� ''q� Pacific Engineering Design, Inc. J '� 1� 861Y ���� ���� �� ����� ��p1 __�. .��...�.._.. May 17, 2000 PEDI Job No. 99030 .`� - �.��-- - . ,,,�. �,����.� _ .� .,_ _ _.. � RE�� D FEB 21 2001 BU�LDING DIVI310N 2 932 TABLE OF CONTENTS Pa e 1. PROJECT OVERVlEW......................................................................................1 - 7 11. PRELIMINARY CONDITIONS 3UMMARY.........................................................8 - 9 m. OFFSITE ANALYSIS .....................................................................................10 12 IV. RETENT{ON/DETENTI�N ANALYSIS AND DESIGN...................................13 - 37 V. CONVEYANCE SYSTEM ANALYSIS AND DESIGN.......................................38�9 Vi. SPECIAI. REPORTS AND STUDIES....................................................................40 Vtt. BASIN AND COIIIIMUNII'Y PLANNING AREAS...................................................41 Vlil. OTHER PERMITS.................................................................................................42 IX. EROSION/SEDtMENTATiON CONTROL DESIGN ..............................................43 X. BOND QUANTITIES WORKSHEET, RETENTION/DETENTION FACILITY SUMMARY SHEET AND SKETCH, AND DECLARATION OF COVENANT..........................................................................44 Xl. MAINTENANCE AND OPERATIONS MANUAL...................................................45 f I. PROJECT OVERVIEW P:\Project Files\9903019930 drainage report.doc � Proict Narrative�Taco Time(2"d Avenue) This project is located on 2 parcels of land encompassing a total of 1.61 acres at the southeast corner of the intersection of Rainier Avenue South and South 2°d Street. One parcel encompasses 1.05 acres that is owned by Taco Time. The other pazcel is leased from the Seattle Public Utilities and encompasses 0.56 acres. The site is zoned Commercial-Arterial (CA). The surrounding properties include a Wendy's restaurant to the south and a newly remodeled Super Safeway to the east. The site currently serves an existing Taco Time restaurant with a drive-thru and parking (47 stalls) situated on the northwest portion of the site. The remainder of the site is undeveloped and mostly bare dirt. The site gradually slopes off to the east and south. There is an existing sediment pond and outfall located in the southeast corner of the property. This pond was installed in the late 1980s as part of earlier planned development that was never completed. The soils,as classified on the Soil Conservation Service Maps, are listed as Beausite gravelly, sandy loam, 6%-15% slopes (BeC)bordering on Urban Land(Ur). The proposal is to construct a new Taco Time restaurant with a drive-thru and added parking, and to convert the existing building into another restaurant (walk-in only). Improvements will include paving the remainder of the site that is currently undeveloped, with the addition of 36 new pazking stalls and landscaping. Utility work will include installation of a wet vault for storm detention and water quality treatment, an 8" sanitary sewer extension to sewer both the new and existing buildings, installation of a new grease interceptor, and new domestic and irrigation water meters. Offsite improvements will consist of removing 2 existing entrances and adding 1 new entrance along Rainier Avenue, and the addition of 1 new entrance along 2"d Street. A 10' wide landscaping bufFer will also be created along both Rainier Avenue and 2"a Street. There is a possibility that a connection to Safeway's parking lot will be added in the design phase, although this is not currently depicted on the plans. Construction will involve minimal excavation and embankments. At this time it is estimated the quantity of material in fills or excavation will be less than 1000 c.y. � � � • . 1 • Page t of 2 K(ng County Butiding and Land Developmertt Dtvision TECHNICAL INFORMATtON REPORT (TIR) WORKSHEET - . . . - . . . - . � . . Projeci Owner P�CaQA) 1�: Projeci Name TP�C�C��i i�y�� Address �� ���-� ��-�� �y�'''�`f Location Phone - 2'L�v- CoCoSCo Township �.3� Projed Engineer � Range 5 E Company ��-i�C ��-ti��� Section �$ Project Size �70�13U Sfi AC I•�v� Address Phone ¢�'�S� ��� ��� Upsiream Orainage Basin Size AC ?t�-43i-�1Tc� SEPTTI.E i�c:?+• `IaiP� • • • Q Subdivision Q DOF/G HPA 0 Shoreline Management � Short Subdivision 0 CpE 404 0 Rodcery 0 Grading � DOE Dam Safety Structura!Vaults � Commercial 0 FEMA Fbodplain Other Q Other � COE Wetlands 0 HPA • �,� � . � - Community �-�� I Orainage Basin -i .. 0 River 0 Floodplain � Stream 0 Wetlands � Critical Stream Reach Q Seeps/Springs . � OepressionslSwales Q High G�oundwater Table � Lake Q Groundwater Recharge ' I � Steep Slopes — � Other _—_--- I � Lakeside/Erosion Hazard L -- �. --� - - : ,y,�,:.._.' „_a_ - .E:- So:i Ty;y Slop�s Erosion Potent��J Erosive Veloci;ies ��1��Si� — --- - � -����t---- —O`7'o-3�.---- �" ------ �.� -— � Sra1`�`j t-'�'� - ---- -- ; G,`'/c--15 aif�S�5 -- --- -- � __; Add�t�onal Sheets Attatched '- ------ --- - - - - --- - ---- - �--- ------- - - - — -- ----------- � Page 2 ot 2 King County Butlding and Land Development Dtvlslon TECHNICAL tNFORMATION REPORT (T[R) WORKSHEET . . . REFERENCE UMITATIO(V/S1TE CONSTRAIf�tT � Ch.4-Downstream Analysis � 0 � � 0 Q Addi6onal Sheets Attatched � MI1�lIMUM ESC REC�UIREMENTS MINIMUM ESC REQUIREMENTS DURING CONSTRUCTION FOLLOWING CONSTRUCTION 0 Sedimentation Fadlities � Stabilize Exposed Surface � StabiC¢ed Construdion Enlrance Remove and Restore Temporary ESC FaaliGes � Perimeter Runoff Controt Clean and Remove All Silt and Debris � Clearing and Grading Restrictions Ensure Operation of Permanent Faa(ities � Cover Pradices 0 Flag Limits of NGPES - Construdion Sequenca _ _ � Other ::_-- - - - Other _�= _ . . � � Grass L�ned Channel � Tank 0 Infiltration.- Method of Malysis � Pipe System [� Vault Q Depression 5�:�1 ��� � Open Channel 0 Energy aissapator � Flow Dispersal CompensaGoNMitigation � Dry Pond_.-�:.._:� � WeUand _ , � Waiver o(Eliminated Site Storage • Q WetPond ^���'= � Stream � RegionalDetention , 8rief Description of System Operation �li�� c�Y�P"�-"� S`(ST�W1 C71��%ZEn Tc � O�51TE , trJ�T YP�cUL7 `-t ���J 1.1to A v��sze�'1 �l� STr�2nl �`ts��'''1 I Facitity Related Site limitations Q Additio�al Shests Attatched � Reference Faciliry Limitatio� I __� I � 1. ' I �+1 � � 0 Drainage Easement ' � Cast in Place Vault � Other � Acc,�ss Easemenl � � Retaining Wall � Native Grovrth Protection Easemen; � 0 Rockery>4'High � Tract � i 0 Strudural on Steep Slope � Other �? � - . - . . � ��- f o�a civil ettgineer under my supervision have visited the site. Acival site conditions as observed were incorporated into this worlcsheet and the ; ,�_� attatchments. 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Ur Ur � • �` ` 'AgC' i I •�/ :� P� � � . :12a` i A � a z�` � v •t ' A D ,f/ •� ��• , M 16� .'• . ..i� � 8 l 2� 455 �aaQ��. �i�,� � Pu 9 ' i I � " 9 � PN r��==�i� I � } i ` ,". �C+ ° w L i�� ,�,� I Uf :•• • �� . �i � PU nD9� •� �'. . ��ongacre91� • •j• ,.. ,`�i i i i Pu . 0•01 \ SIS • �� A� ��.�, ;; R�''�� i •- __„;• ' i � f ' � Ur ��� � � Wo ep Wi ���BeCt � , 1 IY`� �1�� I �M p. I I � O � ;� I U • q� .MI�� � \�D � i i «,� Track �� .�� YJ` • � � $�"« ~i - 29T.�-�f�� -- -- - - - - 210 B -�- -----=`>!�`` ----- �6- --- ,� �� ;; Ur � D I �^` � � NR ( �❑ R 5 rvoir 0° AgC � L_ ! 2 Z�- = PY . � Tu i �D ... � � . • � 2 W � Pu � "� Sk � j PU w� j � M � • 1 i � u I � " '� ' � � � 25 � _:�' sM �29� ' •' ■ ' `�Zos �s. � i� �� � ti � Py ` • I f ' •�• • o . 451 \� � (1 �.,,. . ,Sk •� . _ f . �. . II. PRELIMINARY CONDITIONS SUMMARY P:1Project Files19903019930 drainage report.doc v Core ReQuirements: 1. Discharge at the Natlual Locations: The project slopes naturally to the south and east. Drainage then enters an existing TESC pond where it is conveyed to an existing 24" storm drain traveling south along the east property line. The proposed discharge point of the detention vault is at this connection point to the existing 24" system. Therefore this core requirement will be sa.tisfied. 2. Downstream Analysis: A Level 1 Analysis of the downstream drainage is included in this report. 3. Runoff Control: The proposal will utilize an underground cement concrete detention/water quality vault with metering orifices to limit the developed conditions peak rates of runoff to the predevelopment peak rates for the 2 year and 10 year storms and routing the 100 year storm. The vault will incorporate water quality dead storage to meet bio-filtration requirements. 4. Conveyance System: At this preliminary stage, CB inverts and pipe slopes have not yet been determined. The conveyance system will be analyzed for the 25-yeaz storm event based on the Rational Method. This information will be added to the TIR when plans are submitted for building permit review. 5. Temporary Erosion and Sedimentation Control: At this preliminary stage,temporary erosion and sedimentation control has not yet been addressed. This information will be added to the plans and the TIR when plans are submitted for building permit review. These plans shall include BMP's which will minimize erosion and sedimentation onto adjacent properties. Saecial Requirements: Special requirements 1-10 do not apply to this proposal. Requirement 11 (Geotechnical analysis and Report) and Requirements 12 (Soils Analysis and Report)have been waived by city staff. � III. OFF-SITE ANALYSIS P:1Project Files\9903019930 drainage report.doc �(� +' ' ♦ Level 1 Downstream Analysis Following on-site detention and water quality treatrnent, storm runoff exits the site via a 24" storm drain located just off-site,parallel to the east property line. This system runs south-southwest approx. 500 feet, following the old Lake Ave right-of-way to the intersection of Sunset Boulevard(S 3`d St) and Rainier Ave P� s. It then crosses the intersection where it travels west approx. 700' along the south side of the Sunset Boulevazd to Hardie Ave. SW. It then follows Hazdie Ave. SW south approx. 1600 feet to where it crosses under the Burlington Northern right-of-way,just north of SW7"' St. There it crosses Hardie Ave. SW and travels west along the south side of the Burlington Northem right-of-way for approx. 700' where it turns southwest and intersects the system in S W 7`� St. This system follows SW 7�' St for approx. '/2 mile where it daylights into an open water channel known as the P 1 Channel (approx. 1.4 miles downstream of site). � � ' E3 - ? 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I.Oi-� G3 • 19 T23N R5E W 1/2 Q _ Qoo 4Q0 e' ��� °� UTILITIES DIVISION ---- R°ntoa ���, �� 1,480o F 3 - e� � ' � ' ria�w �c�xxic�, ssavicBs c�� as � Lo ..�, ��N,�o ��� ��►� � � 18 T23N R5E W 1/2 IV. RETENTION/DETENTION ANALYSIS & DESIGN P:1Proiect Files19903019930 drainage report.doc �� �F�AINpGE �E�IGN I�he prop�sal is to construe;t a new i ac� �I iilie restaurant witl� a drive-thru and added parkin�. and to convert the existing building into another restaurant(walk-in only). Improvements will include paving the remainder of the site that is currently undeveloped, with the addition of 36 ne�� parking stalls and landscaping. Storm draina���e ���orl: «�ll includz iTl�tallation of a ��-rt ��auit t��r storm detention and water quality treatment. Drainage flow is generally towards the east into an existing I�SC pond installed in the late 1980's under an earlier building permit that has since lapsed. This pond is connected via an overflow pipe to the existing 24" storm pipe near the southeast property corner. Proposed construction will remove this TESC pond. On site storm drainage will be collected in a series � catchbasins which will route runoff to the detention/water quality vault. Only runoff from new impervious paving and structures will connect to the vault. Existing pavement and structures � be connected directly to the existing storm drainage system offsite. The proposed detention an� water quality vault will connect to the existing 24"pipe at approx. the same location as the existing TESC pond does today. The project will comply with CorP R��,�;YPmPnr� i_; �r�n� the Special Requirements from 1-12 appeaz to apply to this project Calculations to size a storm drainage detention vault were done usi�.� :.�� �. :�. �., �, .;:. program based on the SBLTH/SCS hydrograph method. The pre-developed 2-year and l i hr. storm events were matched with the post-developed 2-year and 10-year/24 hr. events determine the required storm detention vault volume (see attached calculations` �,�� � � : designed to route the 100-year storm without detaining per the ]990 KCSWM. P�\Prnirrt FiIrclOQn�(1199�(1 rlrainavr rrmrt�inr. �� „(G A.D/�'N Ol I� �Ol��C'P U �v '^ � � �I � '�.P�Id612�p � � _ 80llTFi SECOPp 9TF�T �sro"�`�c f"��? - �_ _ _ __ _ � _ _ _ _ _ _ _ _ - - sel9Y7et � an� �ur 4 mrn Qw • Y _ T�- _ ': _ � -�-r � _ � _ _ - _ ' _ _ _ _ _ _ _ _ _ _ ��_ I � EX:STW(:ST/Yi4�AM�H0.E � � � � f 1 56.98 �, -�T � � �� W wv-xs.ax,b��r,C-�"� ,y' JnSixW bidlY�aE � a C � I�M�29��6.�MC-� � A \ My 29.8�B�GOIIL-N)1 �/ �5�' �3�� � � � � � rwm��(ie'tovc-etw� �'� �� . jj _��o ce j�srne�m�u ww�ac V Z F Q -� - - ^� • � 1 / / WV�?S.MIB"WIC-5) /�NV�177E(t8'MS-0� �� FO', O O - I . _� ' ” �� '. ... . . \\ • � '! . . . ' /'. " /j wwt��efie'ca+c-w�s) � 2 U � •• ' . ; . 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TOF OF 111E�21.0 � � "' fr � `� I ��UV� U '� I wv.(�rpur.Yi.so r � � ° �� LL• � gpTTpY Oi vMJLT�DD.O r � n (��T W��T�> PROP06�PAYEYQiT � /�� � 99030 tM�irp�fl�y� � / Ow� PROJECT NO. � �.i�r W d cv �C�1�/ Y � « oA�wri ar s = Z4,894sf (e.571� a�� ' � 3-15-00 � � � ISSUE DwTE � i • � 1' 7-OS-00 I � / SHEET REVISION '1' '`'l �.1 1 ,w� �� CHECKm FOR CdAPUANCE R6COlOBNTD� aa�oonotuwa `= - - - - _ _ = Z O'�9 3 ro arr sr,v+n�os roa ePPeovec - - _ _ _� _ _f�o. ICo2 �►�,� , oa�. Q �: � � J � � Date BY: � � � Date_ BY: � � PACIFIC E NGIIVEERtNG DESIGN INC. o CiYIL ENGINEERING AN� .�; � `� PL.�NNING CONSULTANTS � TECHNICAL INFORMATION REPORT TACO TIME RENTON, WASHINGTON May 17, 2000 PREPARED FOR Accord, Inc. 3300 Maple Vailey Highway Renton, WA 98058 (425) 226-6656 PREPARED BY PACIFIC ENGINEERING DESIGN, INC. 4800 S. 188T" STREET, SUITE 360 SEATTLE, WASHINGTON 98188 {206) 431-7970 � � � � • � • .�.•� sa ` ' � � � � q � ' i �,��"�'r�'�','��� . �� _��` � ��,� , � • �:�� � �I/ �`� � �� ' � ��,,,• _ ������.� ; � �r : ��� , �� � . �, � �.��� _ � , �� j ,�� � F^ �� � �� �1� . . e��..� �. � . ��. 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' �'`��_ � � � . �' � - � � r _ . ��� � _ �. � ,�� �1i, ���' ��'' � E �'` � ��1�►. r � . . � � � � _ � � __ ..,0� � ���� �� , �t�i'��,��'a y� 1u1. ','►�i�1►`�� , ,F ����/ �t�4��,����71��� � �� `\� , ��u�� �1�� v�'1V � _ �f ;�' `� � '�E �w��"'"�������� �l��-\1 � { � . . � �� � �� � ' � � . .�� � ,� � :� . .�� � . ..,�i��� � ���� '��, , � � �'' � `�.'�_..'7�rr . �.� , *, �� ��� � - ��� �� � , ���'""�4 - _ �w��� � �►. . . � � `. I� ������ �'r �� , <\--�c�w� �� �;�, 1, �� � . ���� � � � �� �� ,� � ,. � �� �� , � m �_�, ,�� ����~i �I���� ,������ � ��,�r� '� ��� , ��.��� ,.�, �� . � � .. ��"�'� � ' �� � � , . � � � � ��. �� � , �� ��� . F � ..� , a �:!�� � � .'a�■� _- - �, ..�� . - , .. �' ��/,� . .� ��-�`� . : ,. � � • n�...����� / ,�� j�- � .� , � _ �� r ��i, _� � � ,s� .� ' I�� � �t, ��' i �� %M � � m � � � ' .. � � �� 9, � • . �..�,�� � ,{ • i ,, . .. ai�/������� . - , . . . • . . . � ��I�(��/1�� • � �� I�i�:�:' . � . • . �� . , �.��'wil�.'��� - � • ! . / \ � , '�'""" � . — _'_ -------- � , .• ... 8/30/00 1 : 14 :55 pm Pacific Engineering Design Inc page 1 Taco Time - Renton Pr�ject No . 99030 --------------------------------------------------------------------- --------------------------------------------------------------------- BASIN SUMMARY BASIN ID: EX-10 NAME: EXISTING 10 YR SBUH METHODOLOGY TOTAL AREA. . . . . . . : 0 . 73 Acres BASEFLOWS : 0 . 00 cfs RAINFALL TYPE. . . . : TYPElA PERV IMP PRECIPITATION. . . . : 2 . 90 inches AREA. . : 0 . 73 Acres 0 . 00 Acres TIME INTERVAL. . . . : 10 . 00 min CN. . . . : 86 . 00 0 . 00 TC. . . . . 11 . 46 min 0 . 00 min ABSTRACTION COEFF: 0. 20 TcReach - Sheet L: 215 . 00 ns : 0 . 0600 p2yr: 2 . 00 s : 0 . 0180 PEAK R.ATE: 0 .23 cfs VOL: 0 . 10 Ac-ft TIME: 480 min BASIN ID: EX-100 NAME: EXISTING 100 YR SBUH METHODOLOGY TOTAL AREA. . . . . . . : 0 . 73 Acres BASEFLOWS : 0 . 00 cfs RAINFALL TYPE. . . . : TYPElA PERV IMP PRECIPITATION. . . . : 3 . 90 inches AREA. . : 0 . 73 Acres 0 . 00 Acres TIME INTERVAL. . . . : 10 . 00 min CN. . . . : 86 . 00 0 . 00 TC. . . . . 11 .46 min 0 . 00 min ABSTR.ACTION COEFF: 0 . 20 TcReach - Sheet L: 215 . 00 ns : 0 . 0600 p2yr: 2 . 00 s : 0 . 0180 PEAK RATE: 0 .38 cfs VOL: 0 . 15 Ac-ft TIME : 480 min BASIN ID: EX-2 NAME: EXISTING 2 YR SBUH METHODOLOGY TOTAL AREA. . . . . . . : 0 . 73 Acres BASEFLOWS : 0 . 00 cfs RAINFALL TYPE . . . . : TYPElA PERV IMP PRECIPITATION. . . . : 2 . 00 inches AREA. . : 0 . 73 Acres 0 . 00 Acres TIME INTERVAL. . . . : 10 . 00 min CN. . . . : 86 . 00 0 . 00 TC. . . . . 11 .46 min 0 . 00 min ABSTRACTION COEFF : 0 . 20 TcReach - Sheet L: 215 . 00 ns : 0 . 0600 p2yr: 2 . 00 s : 0 . 0180 PEAK RATE : 0 . 11 cfs VOL: 0 . 05 Ac-ft TIME: 480 min r� T. �=: 8/30/00 1 : 15 : 10 pm Pacific Engineering Design Inc page 1 Taco Time - Renton Project No. 99030 --------------------------------------------------------------------- --------------------------------------------------------------------- BAS IN SUNlMARY BASIN ID: DEV-10 NAME: DEVELOPED 10 YR SBUH METHODOLOGY TOTAL AREA. . . . . . . : 0 . 73 Acres BASEFLOWS : 0 . 00 cfs RAINFALL TYPE. . . . : TYPElA PERV IMP PRECIPITATION. . . . : 2 . 90 inches AREA. . : 0 . 16 Acres 0 . 57 Acres TIME INTERVAL. . . . : 10 . 00 min CN. . . . : 86 . 00 98 . 00 TC. . . . . 5 . 00 min 5 . 00 min ABSTRACTION COEFF: 0 . 20 PEAK RATE: 0 .40 cfs VOL: 0 . 15 Ac-ft TIME: 480 min BASIN ID: DEV-100 NAME: DEVELOPED 100 YR SBUH METHODOLOGY TOTAL AREA. . . . . . . : 0 . 73 Acres BASEFLOWS : 0 . 00 cfs RAINFALL TYPE. . . . : TYPElA PERV IMP PRECIPITATION. . . . : 3 . 90 i�ches AREA. . : 0 . 16 Acres 0 . 57 Acres TIME INTERVAL. . . . : 10 . 00 min CN. . . . : 86 . 00 98 . 00 TC. . . . . 5 . 00 min 5 . 00 min ABSTRACTION COEFF: 0 . 20 PEAK RATE : 0 . 56 cfs VOL: 0 . 21 Ac-ft TIME: 480 min BASIN ID: DEV-2 NAME: DEVELOPED 2 YR SBUH METHODOLOGY TOTAL AREA. . . . . . . : 0 . 73 Acres BASEFLOWS : 0 . 00 cfs RAINFALL TYPE. . . . : TYPElA PERV IMP PRECIPITATION. . . . : 2 . 00 inches AREA. . : 0 . 16 Acres 0 . 57 Acres TIME INTERVAL. . . . : 10 . 00 min CN. . . . : 86 . 00 98 . 00 ' TC. . . . . 5 . 00 min 5 . 00 min ABSTRACTION COEFF: 0 .20 PEAK RATE: 0 . 26 cfs VOL: 0 . 10 Ac-ft TIME : 480 min n � ��, 8/31/00 3 :41 :5 pm Pacific Engineering Design Inc page 2 Taco Time - Renton Project No . 99030 --------------------------------------------------------------------- --------------------------------------------------------------------- STORAGE STRUCTURE LIST RECTANGULAR VAULT ID No. VAULT-1 Description: VAULT Length : 32 . 00 ft . Width: 18 . 00 ft . voids : 1 . 000 - � 8/31/00 3 :41 :5 pm Pacific Engineering Design Inc page 3 Taco Time - Renton Project No. 99030 STAGE STORAGE TABLE RECTANGULAR VAULT ID No. VAULT-1 Description: VAULT Length: 32 . 00 ft . Width: 18 . 00 ft . voids : 1 . 000 STAGE <----STORAGE----� STAGE <----STORAGE----> STAGfi <----STORAG&----> STAGE <----STORAGE----> (ft) ---cf--- --Ac-Ft- (ft) ---cf--- --Ac-Ft- (ft) ---cf--- --Ac-Ft- (ft) ---cf--- --Ac-Ft- 21.50 0.0000 O.D000 22.30 464.80 0.0106 23.10 921.60 0.0212 23.90 1382 0.0317 21.60 57.600 0.0013 22.40 518.40 4.0119 23.20 979.20 0.0225 24.00 1440 0.0331 21.70 115.20 O.D026 22.54 576.00 0.0132 23.30 1037 0.0238 24.10 1498 0.0344 21.80 172.80 O.D040 22.60 633.60 0.0145 23.40 1094 0.0251 24.20 1555 0.0357 21.90 230.40 0.0053 22.70 691.20 0.0159 23.50 1152 0.0264 24.30 1613 0.0370 22.00 288.00 0.0066 22.80 748.80 0.0172 23.60 1210 0.0278 24.40 1670 0.0383 22.10 345.60 0.0079 22.90 806.40 0.0185 23.70 1267 0.0291 24.50 1728 0.0397 22.20 403.20 0.0093 23.00 864.00 0.0198 23.80 1325 0.0304 �� V J 8/31/00 3 :41 : 5 pm Pacific Engineering Design Inc page 4 Taco Time - Renton Project No. 99030 --------------------------------------------------------------------- --------------------------------------------------------------------- DISCHARGE STRUCTURE LIST COMBINATION DISCHARGE ID No. COMBO Description: RISER+ORIFICES Structure : ORIFICE Structure : Structure : RISER Structure : Structure : MULTIPLE ORIFICE ID No. ORIFICE Description: MULTI-ORIFICE RISER Outlet Elev: 21 . 50 Elev: 19 . 50 ft Orifice Diameter: 2 . 0713 in. Elev: 22 . 90 ft Orifice 2 Diameter: 2 . 6500 in. RISER DISCHARGE ID No. RISER Description: RISER Riser Diameter (in) : 12 . 00 elev: 24 . 00 ft Weir Coefficient . . . : 9 . 739 height : 24 . 50 ft Orif Coefficient . . . : 3 . 782 increm: 0 . 10 ft n q I _-r 8/31/00 3 :41 :5 pm Pacific Engineering Design Inc page 5 Taco Time - Renton Project No. 99030 STAGE DISCHARGE TABLE COMBINATION DISCHARGE ID No. COMBO Description: RISER+ORIFICES Structure : ORIFICE Structure: Structure : RISER Structure: Structure : STAGE <--DISCF3ARGE---> STAGE <--DISCHARGE---> STAGE <--DISCHARGE---> STAGE <--DISCHARGE---> (Pt) ---cfs-- ------- (ftl ---cfs-- ------- (ft) ---cfs- ------- (ft) ---cfs-- ------- 21.50 0.0000 22.20 0.0974 22.90 0.1378 23.60 0.3282 21.60 0.0368 22.30 0.1041 23.00 0.2029 23.70 0.3431 21.70 0.0521 22.40 0.1104 23.1D 0.2325 23.80 0.3574 21.80 0.0638 22.50 0.1164 23.20 0.2562 23.90 0.3709 21.90 0.0736 22.60 0.1221 23.30 0.2767 24.00 0.3840 22.00 0.0823 22.70 0.1275 23.40 0.2952 22.10 0.0902 22.80 0.1327 23.50 0.3123 n c �� 8/31/00 3 :41 :5 pm Pacific Engineering Design Inc page 6 Taco Time - Renton Project No. 99030 STAGE DISCHARGE TABLE MULTIPLE ORIFICE ID No. ORIFICE Description: MULTI-ORIFICE RISER Outlet Elev: 21 . 50 Elev: 19 . 50 ft Orifice Diameter: 2 . 0713 in. Elev: 22 . 90 ft Orifice 2 Diameter: 2 . 6500 in. STAGE <--DISCHARGE---� STAGE <--DISCHARGE---> STAGE <--DISCHARGE---> STAGE <--DISCHARGE---> fftl ---cfs-- ------- Ift) ---cfs-- ------- (ft) ---cfs-- ------- (ft) ---cfs-- ------- 21.50 0.0000 22.20 D.0974 22.90 0.1378 23.60 0.3282 21.60 0.0368 22.30 0.1041 23.00 0.2029 23.70 0.3431 21.70 0.0521 22.40 0.1104 23.10 0.2325 23.80 0.3574 21.80 0.0636 22.50 0.1164 23.20 0.2562 23.90 0.3709 21.90 0.0736 22.60 0.1221 23.30 0.2767 24.00 0.384D 22.00 0.0823 22.70 0.1275 23.40 0.2952 22.10 0.0902 22.80 0.1327 23.50 0.3123 ! n n . , 8/31/00 3 :41 : 14 pm Pacific Engineering Design Inc page 7 Taco Time - Renton Project No. 99030 LEVEL POOL TABLE SUMMARY MATCH INFLOW -STO- -DIS- <-PEAK-> STORAGE <--------DESCRIPTION---------> (cfs) (cfs) --id- --id- <-STAGE> id VOL (cf) EX-2 TO DEV-2 ....... ......... 0.11 0.26 VAULT-1 COM80 22.45 10 548.91 cf EX-10 TO DEV-10 ..... ......... 0.23 0.40 VAUI,T-1 COMBO 23.09 11 916.61 cf RODTE 100 YR ................. 0.38 0.56 VAUI,T-1 COMBO 23.69 21 1264.29 cf i I r' 8/31/00 3 :43 : 5 pm PaciTic Engineering Design Inc page 1 Taco Time - Renton Project No. 99030 --------------------------------------------------------------------- --------------------------------------------------------------------- RCUTING �EPCRT RECTANGULAR VAULT ID No. VAULT-1 Description : VAULT Len.,- : _- �_ - _ COMBIiVATION DISCIiARGE ID No. CC Description: RISER+ORIFICES Structure : ORIFICE Structur Structure � -�-��� -� � ���- �-��� Structure � � ROUTING CUR' � sraca sTORr,cs ou-. � (ft) (cf) ;c'_s) cfs-m=n ,=.i ;csi ;c's� .:�s-mi:, ;�ti cz; (cfsi cis-mir. 21.50 0.0000 0.0000 0.0000 22.60 633.60 0.1221 2.2341 23.70 1267 0.3431 4.5671 21.60 57.600 0.0368 0.2288 22.70 691.20 0.1275 2.4315 23.80 1325 0.3574 4.7734 21.70 115.20 0.0521 0.4361 22.80 748.80 0.1327 2.6267 23.90 13$2 0.3709 4.9789 l 21.80 172.80 0.0638 0.6398 22.90 806.40 0.1378 2.8256 24.OD 14 0.3840 5.1840 21.90 230.40 0.0736 0.8416 23.00 864.00 0.2029 3.0829 24.10 1498 0.7045 5.69fi5 22.00 288.00 0.0823 1.0423 23.10 21 0 0.2325 3.3045 24.20 1555 1.2797 6.4637 22.10 345.60 0.0902 1.2422 23.20 979.20 0.2562 3.5202 24.30 1613 2.0206 7.3966 22.20 403.20 0.0974 1.4414 23.30 1037 0.2767 3.7327 24.40 1670 2.8236 8.3916 22.30 460.80 0.1041 1.6401 23.40 1094 0.2952 3.9432 22.40 �518� 0_1104 1.8384 23.50 1152, 0.3123 4.1523 \ 22.50 576.00 0.1164 2.0364 23.60 1210 0.3282 4.3602 fl� . , . 8/31/00 3 : 43 :5 pm Pacific Engineering Design Inc page 2 Taco Time - Renton Project No. 99030 LEVEL POOL ROUTING TABLE EX-2 TO DEV-2 MATCH Q (cfs) . 0 . 11 INFLOW Q (cfs) : 0 . 26 PEAK STAGE (ft) : 22 .45 PEAK OUTFLOW . 0 . 11 PEAK TIME : 520 . 00 min. INFLOW HYD No. : DEV-2 OUTFLOW HYD No. : 10 LEVEL POOL ROUTING TABLE I1 I2 2S1 SUM O1 02+252 STAGE TIME <---------------------- cfs min ---------------------> (ft) (min) �0 . 0000 O . OQ07 0 . 0000 0 . 0007 0 . 0000 0 . 0007 21 . 50 70 . 00 0 . 0007 0 . 0028 0 . 0006 Q . 0041 0 . 0001 0 . 0040 21 . 50 80 . 00 O . OQ28 0 . 0056 Q . 0034 0 . 0118 0 . 0006 0 . 0112 21 . 60 90 . 00 0 . 0056 0 . 0081 0 . 0094 0 . 0231 0 . 0018 0 . 0213 21 . 60 100 . 00 0 . 0081 0 . 0102 0 . 0178 0 . 0361 0 . 0034 0 . 0327 21 . 60 110 . 00 0 . 0102 0 . 0121 0 . 0274 0 . 0497 0 . 0053 0 . 0444 21 . 60 120 . 00 0 . 0121 0 . 0150 0 . 0373 0 . 0643 0 . 0071 0 . 0572 21 . 60 130 . 00 0 . 0150 0 . 0181 0 . 0480 0 . 0811 0 . 0092 0 . 0719 21 . 60 140 . 00 0 . 0181 0 . 0199 0 . 0603 0 . 0983 0 . 0116 0 . 0868 21 . 60 150 . 00 0 . 0199 0 . 0213 0 . 0728 0 . 1140 0 . 0140 0 . 1000 21 . 60 160 . 00 0 . 0213 0 . 0229 0 . 0839 0 . 1281 0 . 0161 0 . 1120 21 . 60 170 . 00 0 . 0229 0 . 0241 0 . 0940 a . 1410 0 . 0180 0 . 1229 21 . 60 180 . 00 0 . 0241 0 . 0250 0 . 1032 0 . 1523 0 . 0198 0 . 1325 21 . 60 190 . 00 0 . 0250 0 . 0263 0 .1112 0 . 1625 0 . 0213 0 . 1412 21 . 60 200 . 00 0 . 0263 0 . 0272 0 .1184 0 . 1719 0 . 0227 0 . 1492 21 . 60 210 . OQ 0 . 0272 0 . 0278 0 . 1252 0 . 1801 0 . 0240 0 . 1561 21 . 60 220 . 00 0 . 0278 0 . 0287 0 . 1310 0 . 1875 0 . 0251 0 . 1623 21 . 60 230 . 00 0 . 0287 0 . 0294 0 . 1362 0 . 1944 0 . 0261 0 . 1683 21 . 60 240 . 00 0 . 0294 0 . 0322 0 . 1412 0 . 2028 0 . 0271 0 . 1757 21 . 60 250 . 00 0 . 0322 0 . 0349 0 . 1474 0 . 2145 0 . 0283 0 . 1862 21 . 60 260 . 00 0 . 0349 0 . 0356 0 . 1563 0 . 2268 0 . 0300 0 . 1968 21 . 60 270 . 00 0 . 0356 0 . 0365 0 . 1651 0 . 2372 0 . 0317 0 . 2055 21 . 60 280 . 00 0 . 0365 0 . 0368 0 . 1725 0 . 2457 0 . 0331 0 . 2126 21 . 60 290 . 00 0 . 0368 0 . 0373 0 . 1784 0 . 2524 0 . 0342 0 . 2182 21 . 60 300 . 00 0 . 0373 0 . 0476 0 . 1831 0 . 2680 0 . 0351 0 . 2329 21 . 60 310 . 00 0 . 0476 0 . 0581 0 . 1958 0 . 3014 0 . 0371 0 . 2643 21 . 60 320 . 00 � a . 0581 0 . 0594 0 .2249 0 . 3423 0 . 0394 0 . 3029 21 . 62 330 . 00 0 . 0594 0 . 0606 0 . 26Q6 0 .3805 0 . 0423 0 . 3383 21 . 64 340 . 00 ' 0 . 0606 0 . 0617 0 .2934 0 .4157 0 . 0449 0 . 3708 21 . 65 350 . 00 , 0 . 0617 0 . 0627 0 .3235 0 .4479 0 . 0473 0 . 4007 21 . 67 360 . 00 0 . 0627 0 . 0611 0 .3512 0 . 4750 0 . 0495 0 . 4255 21 . 68 370 . 00 ', 0 . 0611 0 . 0593 0 . 3742 0 .4946 0 . 0513 0 . 4434 21 . 69 380 . 00 ', 0 . 0593 0 . 0597 0 . 3909 0 . 5099 0 . 0525 0 . 4574 21 . 70 390 . 00 I 0 . 0597 0 . 0604 0 .4041 0 . 5242 0 . 0533 0 . 4709 21 . 71 400 . 00 ' 0 . 0604 0 . 0613 0 .4168 0 . 5385 0 . 0541 0 .4844 21 . 72 410 . 00 0 . 0613 � . 0616 0 .4296 0 . 5525 0 . 0548 0 .4976 21 . 72 420 . 00 I 0 . 0616 0 . 0993 0 .4420 0 . 6029 0 . 0556 0 . 5473 21 . 73 430 . 00 O . Q993 0 . 1382 0 .4888 0 . 7263 0 . 0585 0 . 6678 21 . 75 440 . 00 0 . 1382 0 . 1404 0 . 6027 0 . 8812 0 . 0651 0 . 8161 21 . 81 450 . 00 0 . 1404 0 . 1967 0 . 7437 1 . 0808 0 . 0724 1 . 0084 21 . 89 460 . 00 0 . 1967 0 . 2544 0 . 9275 1 . 3785 0 . 0809 1 . 2977 21 . 98 470 . 00 �^ 8/31/00 3 :43 : 5 pm Pacific Engineering Design Inc page 3 Taco Time - Renton Project No. 99030 LEVEL POOL ROUTING TABLE LEVEL POOL ROUTING TABLE I1 I2 2S1 SUM O1 02+2S2 STAGE TIME <---------------------- cfs min ---------------------> (ft) (min) 0 .2544 0 . 2589 1 . 2a55 1 . 7188 0 . 0922 1 . 6266 22 . 13 480 . 00 0 .2589 0 . 1871 1 . 5229 1 . 9689 0 . 1037 1 . 8653 22 . 29 490 . 00 0 .1871 0 . 1134 1 . 7540 2 . 0544 0 . 1113 1 . 9432 22 .41 500 . 00 0 .1134 0 . 114a 1 . 8296 2 . 0569 0 . 1136 1 . 9433 22 .45 510 . 00 0 . 1140 0 . 1081 1 . 8297 2 . 0517 0 . 1136 1 . 9381 22 .45 520 . 00 0 . 1081 0 . 1024 1 . 8247 2 . 0352 0 . 1135 1 . 9217 22 .45 530 . Od 0 . 1024 0 . 1029 1 . 8Q87 2 . 0140 0 . 1130 1 . 9011 22 . 44 540 . 00 0 . 1029 0 . 0870 1 . 7887 1 . 9785 0 . 1123 1 . 8662 22 . 43 550 . 00 0 . 0870 0 . 0710 1 . 7549 1 . 9128 0 . 1113 1 . 8015 22 . 41 560 . 00 0 . 0710 0 . 0711 1 . 6923 1 . 8344 0 . 1093 1 . 7251 22 . 38 570 . 00 0 . 0711 0 . 0717 1 . 6183 1 . 7611 0 . 1068 1 . 6543 22 . 34 580 . 00 0 . 0717 0 . 0715 1 . 5497 1 . 6929 0 . 1046 1 . 5883 22 . 31 590 . 00 0 . 0715 0 . 0716 1 .4859 1 . 6290 0 . 1024 1 . 5267 22 . 27 600 . 00 0 . 0716 0 . 0687 1 .4264 1 . 5667 0 . 1003 1 . 4664 22 . 24 610 . 00 0 . 0687 0 . 0657 1 . 3681 1 . 5025 0 . 0983 1 .4042 22 . 21 620 . 00 0 . 0657 0 . 0658 1 . 3081 1 .4396 0 . 0961 1 . 3435 22 . 18 630 . 00 0 . 0658 0 . 0655 1 . 2497 1 . 3810 0 . 0939 1 . 2871 22 . 15 640 . 00 0 . 0655 0 . 0660 1 . 1953 1 . 3269 0 . 0918 1 . 2351 22 . 12 650 . 00 0 . 0660 0 . 0662 1 . 1452 1.2773 0 . 0899 1 . 1874 22 . 10 660 . 00 0 . 0662 0 . 0595 1 . 0994 1 . 2251 0 . 0880 1 . 1370 22 . 07 670 . 00 0 . 0595 0 . 0528 1 . 0510 1 . 1633 0 . 0860 1 . 0773 22 . 05 680 . 00 0 . 0528 0 . 0529 0 . 9936 1 . 0994 0 . 0837 1 . 0157 22 . 02 690 . 00 0 . 0529 0 . 0534 0 . 9345 1 . 0408 0 . 0812 0 . 9596 21 . 99 700 . 00 0 . 0534 0 . 0531 0 . 8809 0 . 9873 0 . 0787 0 . 9086 21 . 96 710 . 00 0 . 0531 0 . 0531 0 . 8320 0 . 9382 0 . 0765 0 . 8617 21 . 93 720 . 00 0 . 0531 0 . 0536 0 . 7872 0 . 8939 0 . 0745 0 . 8194 21 . 91 730 . 00 0 . 0536 0 . 0533 0 . 7468 0 . 8537 0 . 0725 0 . 7811 21 . 89 740 . 00 0 . 0533 0 . 0533 0 . 7105 0 . 8170 0 . 0707 0 . 7463 21 . 87 750 . 00 0 .0533 0 . 0538 0 . 6774 0 . 7845 0 . 0690 0 . 7155 21 . 85 760 . 00 0 .0538 O . Q534 0 . 6480 0 . 7552 0 . 0675 0 . 6878 21 . 84 770 . 00 0 .0534 0 . 0535 0 . 6216 0 . 7286 d . 0661 0 . 6625 21 . 82 780 . 00 0 . 0535 0 . 0471 0 . 5976 0 . 6982 0 . 0649 0 . 6333 21 . 81 790 . 00 0 . 0471 0 . 0403 0 . 5699 0 . 6573 0 . 0634 0 . 5939 21 . 80 800 . 00 0 . 0403 0 . 0403 0 . 5328 0 . 6134 0 . 0611 0 . 5523 21 . 78 810 . 00 0 . 0403 0 . 0404 0 .4935 0 . 5742 0 . 0587 0 . 5155 21 . 76 820 . 00 0 . 0404 0 . 0404 0 .4589 0 . 5396 0 . 0566 0 .4830 21 . 74 830 . 00 � 0 . 0404 0 . 0404 0 .4282 0 . 5091 0 . 0548 0 .4543 21 . 72 840 . 00 ' 0 . 0404 0 . 0437 0 .4012 0 .4853 0 . 0531 0 .4322 21 . 71 850 . 00 0 . 0437 0 . 0474 0 . 3804 0 . 4715 0 . 0518 0 .4197 21 . 70 860 . 00 0 . 0474 0 . 0474 0 . 3688 0 . 4636 0 . 0509 0 .4128 21 . 69 870 . 00 0 . 0474 0 . 0471 0 . 3624 0 .4569 0 . 0504 0 .4065 21 . 69 880 . 00 0 . 0471 0 . 0475 0 . 3567 0 .4512 0 . 0499 0 .4013 21 . 69 890 . 00 I 0 . 0475 0 . 0475 0 .3518 0 .4468 0 . 0495 0 . 3973 21 . 68 900 . 00 � 0 . 0475 0 . 0472 0 . 3481 0 .4428 0 . 0492 0 . 3936 21 . 68 910 . 00 0 . 0472 0 . 0476 0 . 3447 0 .4394 0 . 0489 0 . 3905 21 . 68 920 . 00 0 . 0476 0 . 0477 0 . 3418 0 .4371 0 . 0487 0 . 3883 21 . 68 930 . 00 0 . 0477 0 . 0473 0 . 3398 0 .4347 0 . 0486 0 . 3862 21 . 68 940 . 00 � � � 8/31/00 3 :43 :5 pm Pacific Engineering Design Inc page 4 Taco Time - Renton Project No. 99030 --------------------------------------------------------------------- --------------------------------------------------------------------- LEVEL POOL ROUTING TABLE LEVEL POOL ROUTING TABLE I1 I2 2S1 SUM Ol 02+2S2 STAGE TIME <---------------------- cfs min ---------------------> (ft) (min) ----------------------------------------------------------------------- ----------------------------------------------------------------------- 0 . 0473 0 . 0477 0 . 3378 0 .4328 0 . 0484 0 . 3844 21 . 68 950 . 00 0 . 0477 0 . 0478 0 .3361 0 .4316 0 . 0483 0 . 3833 21 . 68 960 . 00 0 . 0478 0 . 0372 0 . 3352 0 .4201 0 . 0482 0 . 3719 21 . 67 970 . 00 0 . 0372 0 . 0274 0 . 3246 0 . 3891 0 . 0473 0 . 3418 21 . 67 980 . 00 0 . 0274 a . 0274 0 . 2966 0 . 3514 0 . 0451 0 . 3063 21 . 65 990 . 00 0 . 0274 0 . �270 0 . 2638 0 . 3182 0 . 0425 0 . 2756 21 . 64 1000 . 00 0 . 0270 a . 0274 0 . 2354 0 . 2898 0 . 0403 0 . 2495 21 . 62 1010 . 00 0 . 0274 0 . 0274 0 . 2112 0 . 2660 0 . 0383 0 . 2277 21 . 61 1020 . 00 0 . 0274 0 . 0340 0 . 1911 0 . 2525 0 . 0366 0 . 2158 21 . 60 1030 . 00 0 . 0340 0 . 0410 0 . 1811 0 . 2561 0 . 0347 0 . 2214 21 . 60 1040 . 00 0 . 0410 0 . 0410 0 . 1857 0 . 2677 0 . 0356 0 . 2321 21 . 60 1050 . 00 0 . 0410 0 . 0410 0 . 1950 0 . 2771 0 . 0371 0 . 2400 21 . 60 1060 . 00 0 . 0410 0 . 0411 0 . 2024 0 . 2845 0 . 0376 0 . 2468 21 . 61 1070 . 00 0 . 0411 0 . 0411 0 . 2087 0 . 2908 0 . 0381 0 . 2527 21 . 61 1080 . 00 0 . 0411 0 . 0378 0 . 2141 0 . 2930 0 . 0386 0 . 2544 21 . 61 1090 . 00 0 . 0378 0 . 0341 0 . 2157 0 .2876 0 . 0387 0 . 2489 21 . 61 1100 . 00 0 . 0341 0 . 0341 0 . 2106 0 . 2789 0 . 0383 0 . 2406 21 . 61 1110 . 00 0 . 0341 0 . 0469 0 .2029 0 . 2840 0 . 0377 0 . 2463 21 . 61 1120 . 00 0 . 0469 0 . 0342 0 . 2082 0 . 2893 0 . 0381 0 . 2512 21 . 61 1130 . 00 0 . 0342 0 . 0218 0 . 2127 0 . 2687 0 . 0385 0 . 2303 21 . 61 1140 . 00 0 . 0218 0 . 0346 0 . 1934 0 . 2498 0 . 0369 0 . 2129 21 . 60 1150 . 00 0 . 0346 0 . 0342 0 . 1786 0 . 2475 0 . 0343 0 . 2132 21 . 59 1160 . 00 0 . 0342 0 . 0342 0 . 1789 0 .2474 0 . 0343 0 .2131 21 . 60 1170 . 00 0 . 0342 0 . 0347 0 . 1788 0 . 2477 0 . 0343 0 . 2134 21 . 60 1180 . 00 0 . 0347 0 . 0343 0 . 1791 0 . 2480 0 . 0343 0 . 2136 21 . 60 1190 . 00 0 . 0343 0 . 0343 0 . 1793 0 . 2478 0 . 0344 0 . 2134 21 . 60 1200 . 00 � . 0343 0 . 0347 0 . 1791 0 . 2481 0 . 0343 0 . 2137 21 . 60 1210 . 00 0 .0347 0 . 0343 0 . 1793 0 .2484 0 . 0344 0 . 2140 21 . 60 1220 . 00 0 .0343 0 . 0343 0 . 1795 0 . 2482 0 . 0344 0 . 2137 21 . 60 1230 . 00 0 . 0343 0 . 0347 0 . 1794 0 . 2484 0 . 0344 0 . 2140 21 . 60 1240 . 00 0 . 0347 0 . 0343 0 . 1796 0 . 2487 0 . 0344 0 . 2143 21 . 60 1250 . 00 0 . 0343 0 . 0344 0 . 1798 0 . 2485 0 . 0345 0 . 2140 21 . 60 1260 . 00 0 . 0344 0 . 0348 0 . 1796 0 . 2487 0 . 0344 0 . 2143 21 . 60 1270 . 00 0 . 0348 0 . 0344 0 . 1798 0 . 2490 0 . 0345 0 .2145 21 . 60 1280 . 00 0 . 0344 0 . 0344 0 . 1800 0 .2488 0 . 0345 0 . 2143 21 . 60 1290 . 00 0 . 0344 0 . 0348 0 . 1798 0 . 2490 0 . 0345 0 . 2146 21 . 60 1300 . 00 0 . 0348 0 . 0344 0 . 1800 0 . 2493 0 . 0345 0 . 2148 21 . 60 1310 . 00 O . Q344 0 . 0344 0 . 1802 0 . 2491 0 . 0346 0 . 2145 21 . 60 1320 . 00 0 . 0344 0 . 0311 0 . 1800 0 . 2456 0 . 0345 0 . 2111 21 . 60 1330 . 00 O . Q311 0 . 0278 0 . 1771 0 . 2361 0 . 0340 0 . 2021 21 . 60 1340 . 00 0 . 0278 0 . 0278 0 . 1696 0 . 2252 0 . 0325 0 . 1927 21 . 60 1350 . 00 0 . 0278 0 . 0274 0 . 1617 0 . 2170 0 . 0310 0 . 1860 21 . 60 1360 . 00 0 . 0274 a . 0278 0 . 1560 0 . 2113 0 . 0299 0 . 1814 21 . 60 1370 . 00 O . Q278 0 . 0279 0 . 1522 Q . 2079 0 . 0292 0 . 1787 21 . 60 1380 . 00 0 . 0279 0 . 0274 0 . 1500 0 . 2053 0 . 0288 0 . 1765 21 . 60 1390 . OQ 0 . 0274 0 . 0279 0 . 1481 0 . 2034 0 . 0284 a . 1750 21 . 60 1400 . 00 0 . 0279 0 . 0279 0 . 1469 0 . 2026 0 . 0282 0 . 1745 21 . 60 1410 . 00 n � ,, , 8/31/00 3 :43 :5 pm Pacific Engineering Design Inc page 5 Taco Time - Renton Project No. 99030 LEVEL POOL ROUTING TABLE LEVEL POOL ROUTING TABLE I1 I2 2S1 SUM Ol 02+252 STAGE TIME <---------------------- cfs min ---------------------> (ft) (min) ----------------------------------------------------------------------- ----------------------------------------------------------------------- 0 . 0279 0 . 0275 0 . 1464 0 . 2017 0 . 0281 0 . 1737 21 . 60 1420 . 00 0 . 0275 0 . 0279 0 . 1457 0 .2011 0 . 0279 0 . 1731 21 . 60 1430 . 00 0 . 0279 0 . 0279 0 . 1453 0 . 2011 0 . 0279 0 . 1732 21 . 60 1440 . 00 0 . 0279 0 . 0137 0 . 1454 0 . 1870 0 . 0279 0 . 1591 21 . 60 1450 . 00 0 . 0137 0 . 0000 0 . 1335 0 . 1473 0 . 0256 0 . 1217 21 . 60 1460 . 00 0 . 0000 0 . 0000 0 . 1021 0 . 1021 0 . 0196 0 . 0825 21 . 60 1470 . 00 0 . 0000 0 . 0000 0 . 0692 0 . 0692 0 . 0133 0 . 0560 21 . 60 1480 . 00 0 . 0000 0 . 0000 0 . 0470 0 . 0470 0 . 0090 0 . 0380 21 . 60 1490 . 00 0 . 0000 0 . 0000 0 . 0318 0 . 0318 0 . 0061 0 . 0257 21 . 60 1.50Q . 00 0 . 0000 0 . 0000 0 . 0216 O . Q216 0 . 0041 0 . 0175 21 . 60 1510 . 00 0 . 0000 0 . 0000 0 . 0146 0 . 0146 0 . 0028 0 . 0118 21 . 60 1520 . 00 0 . 0000 0 . 0000 0 . 0099 0 . 0099 0 . 0019 0 . 0080 21 . 60 1530 . 00 0 . 0000 0 . 0000 0 . 0067 0 . 0067 0 . 0013 0 . 0054 21 . 60 1540 . 00 0 . 0000 0 . 0000 0 . 0046 0 . 0046 a . 0009 0 . 0037 21 . 60 1550 . 00 0 . 0000 0 . 0000 0 . 0031 0 . 0031 0 . 0006 0 . 0025 21 . 60 1560 . 00 0 . 0000 0 . 0000 0 . 0021 0 . 0021 0 . 0004 0 . 0017 21 . 60 1570 . 00 0 . 0000 0 . 0000 0 . 0014 0 . 0014 0 . 0003 0 . 0012 21 . 60 1580 . 00 0 . 0000 0 . 0000 0 . 0010 0 . 0010 0 . 0002 0 . 0008 21 . 60 1590 . 00 0 . 0000 0 . 0000 0 . 0007 0 . 0007 0 . 0001 0 . 0005 21 . 60 1600 . 00 0 .0000 Q . 00QO 0 . 0004 0 . 0004 0 . 0001 0 . 0004 21 . 60 1610 . Q0 0 . 0000 0 . 0000 0 . 0003 0 . 0003 0 . 0001 0 . 0002 21 . 60 1620 . 00 0 . 0000 0 . 0000 0 . 0002 0 . 0002 0 . 0000 0 . 0002 21 . 60 1630 . 00 0 . 0000 0 . 0000 0 . 0001 0 . 0001 0 . 0000 0 . 0001 21 . 60 1640 . 00 0 . 0000 0 . 0000 0 . 0001 0 . 0001 0 . 0000 0 . 0001 21 . 60 1650 . 00 0 . 0000 0 . 0000 0 . 0001 0 . 0001 0 . 0000 0 . 0001 21 . 60 1660 . 00 0 . 0000 0 . 0000 0 . 0000 0 . 0000 0 . 0000 0 . 0000 21 . 60 1670 . 00 0 . 0000 0 . 0000 0 . 0000 0 . 0000 0 . 0000 0 . 0000 21 . 60 1680 . 00 0 . 0000 0 . 0000 0 . 0000 0 . 0000 0 . 0000 0 . 0000 21 . 60 1690 . 00 0 . 0000 0 . 0000 0 . 0000 0 . 0000 0 . 0000 0 . 0000 21 . 60 1700 . 00 0 . 0000 0 . 0000 0 . 0000 0 . 0000 0 . 0000 0 . 0000 21 . 60 1710 . 00 0 . 0000 0 . 0000 0 . 0000 0 . 0000 0 . 0000 0 . 0000 21 . 60 1720 . 00 7� J '� 8/31/00 3 :43 :5 pm Pacific Engineering Design Inc page 6 Taco Time - Renton Project No. 99030 --------------------------------------------------------------------- --------------------------------------------------------------------- ROUTING REPORT RECTANGULAR VAULT ID No. VAULT-1 Description: VAULT Length: 32 . 00 ft . Width: 18 . 00 ft . voids : 1 . 000 COMBINATION DISCHARGE ID No. COMBO Description: RISER+ORIFICES Structure : ORIFICE Structure : Structure : RISER Structure : Structure : ROUTING CURVE STAGS STORAGS OUTFIAW 0+25 STAGE STORAGE OUTFLOW 0+25 STAGfi STORAGE OUTFLOW 0+25 (ft) (cf) (cfs) cfs-min (ft) (cf) (cfs> cfs-min (ft) (cf) (cfs) cfs-min 21.50 0.0000 0.0000 0.0000 22.60 633.60 0.1221 2.2341 23.70 1267 0.3431 9.5671 21.60 57.600 0.0368 �.2288 22.70 691.20 0.1275 2.4315 23.80 1325 0.35'74 4.7734 21.70 115.20 0.0521 D.4361 22.80 748.80 0.1327 2.0`287 23.90 1382 0.3709 4.9789 21.80 172.80 0.0638 0.6398 22.90 806.40 D.1378 2.8258 24.00 1440 0.3840 5.1840 21.9U 230.40 0.0736 0.6416 23.00 864.00 0.2029 3.0829 24.10 1498 0.7045 5.6965 22.00 288.00 0.0823 1.0423 23.10 921.6 0.2325 3.3045 24.20 1555 1.2797 6.4637 22.10 345.60 0.0902 1.2422 23.20 979.20 0.2562 3.5202 24.30 1613 2.0206 7.3966 22.20 403.20 0.0974 1.4414 23.30 103"7 0.2767 3.7327 24.40 1670 2.8236 8.3916 22.30 460.80 0.1041 1.6401 23.4U 1094 0.2952 3.9432 22.40 �18.4 0.1104 1.8384 23.50 1152 0.3123 4.1523 22.50 5'16.00 0.1164 2.0364 23.60 1210 0.3282 4.3602 r, ^ ,,i 8/31/00 3 :43 :5 pm Pacific Engineering Design Inc page 7 Taco Time - Renton Project No. 99030 LEVEL POOL ROUTING TABLE EX-10 TO DEV-10 MATCH Q (cfs) . 0 .23 INFLOW Q (cfs) : 0 .40 PEAK STAGE (ft) : 23 . 09 PEAK OUTFLOW . 0 .23 PEAK TIME: 510 . 00 min. INFLOW HYD No. : DEV-10 OUTFLOW HYD No. : 11 LEVEL POOL ROUTING TABLE I1 I2 251 SUM Ol 02+252 STAGE TIME <---------------------- cfs min ---------------------> (ft) (min) 0 . 0000 0 . 0005 0 . 0000 0 . 0005 0 . 0000 0 . 0005 21 . 50 50 . 00 0 . 0005 0 . 0023 0 . 0004 0 . 0032 0 . 0001 0 . 0031 21 . 50 60 . 00 0 . 0023 0 . 0069 0 . 0026 0 . 0118 0 . 0005 0 . 0113 21 . 60 70 . 00 0 . 0069 0 . 0124 0 . 0095 0 . 0288 0 . 0018 0 . 0270 21 . 60 80 . 00 0 . 0124 Q . 0167 0 . 0226 0 . 0517 0 . 0043 0 . 0474 21 . 60 90 . 00 0 . 0167 0 . 0202 0 . 0397 0 . 0767 0 . 0076 0 . 0690 21 . 60 100 . 00 0 . 0202 0 . 0233 0 . 0579 0 . 1014 0 . 0111 0 . 0903 21 . 60 110 . 00 0 . 0233 0 . 0259 0 . 0758 0 . 1249 0 . 0145 0 . 1104 21 . 60 120 . 00 0 . a259 0 . 0305 0 . 0926 0 . 1490 0 . 0178 0 . 1312 21 . 60 130 . 00 0 . 0305 0 . 0355 0 . 1101 0 . 1761 0 . 0211 0 . 1550 21 . 60 140 . 00 0 . 0355 0 . 0377 0 . 1300 0 . 2032 0 . 0249 0 . 1783 21 . 60 150 . 00 0 . 0377 0 . 0393 0 . 1496 0 .2266 0 . 0287 0 . 1979 21 . 60 160 . 00 0 . 0393 0 . 0413 0 . 1660 0 . 2466 0 . 0318 0 . 2148 21 . 60 170 . 00 0 . 0413 0 . 0428 0 . 1802 0 . 2643 0 . 0346 0 . 2297 21 . 60 180 . 00 0 . 0428 0 . 0437 0 . 1928 0 . 2793 0 . 0369 0 . 2424 21 . 60 190 . 00 0 . 0437 0 . 0452 0 . 2046 0 . 2934 0 . 0378 0 . 2556 21 . 61 200 . OQ 0 . 0452 0 . 0462 0 . 2168 0 . 3082 0 . 0388 0 . 2694 21 . 61 210 . 00 0 . 0462 0 . 0467 0 . 2296 0 . 3225 0 . 0398 0 .2826 21 . 62 220 . 00 0 . 0467 0 . 0479 0 . 2419 0 . 3364 0 . 0408 0 . 2957 21 . 63 230 . 00 0 . 0479 0 . 0488 0 . 2539 0 . 3506 0 . 0417 0 . 3088 21 . 63 240 . 00 0 . a488 0 . 0532 0 . 2661 0 . 3681 0 . 0427 0 . 3254 21 . 64 250 . 00 0 . 0532 0 . 0577 0 . 2814 0 .3923 0 . 0439 0 . 3484 21. 65 260 . 00 0 . 0577 0 . 0588 0 . 3028 0 .4192 0 . 0456 0 . 3736 21 . 66 270 . 00 0 . 0588 0 . 0602 0 .3261 0 . 4452 0 . 0475 0 .3977 21 . 67 280 . 00 0 . 0602 0 . 0607 0 . 3484 0 . 4694 0 . 0492 0 .4202 21 . 68 290 . OQ 0 . 0607 0 . 0616 0 . 3693 0 .4916 0 . 0509 0 .4407 21 . 69 300 . 00 0 . 0616 0 . 0786 0 . 3883 0 . 5285 0 . 0523 0 .4762 21 . 70 310 . 00 0 . 0786 0 . 0955 0 .4218 0 . 5960 0 . 0544 0 . 5416 21 . 72 320 . 00 0 . 0955 0 . 0971 0 .4835 0 . 6760 Q . 0581 0 . 6179 21 . 75 330 . 00 0 . 0971 0 . 0985 0 . 5554 0 . 7509 0 . 0625 0 . 6884 21 . 79 340 . 00 0 . 0985 0 . 0998 0 . 6223 0 . 8205 Q . 0661 0 . 7544 21 . 82 350 . 00 ' 0 . 0998 0 . 1010 0 . 6850 0 . 8858 0 . 0694 0 . 8164 21 . 86 360 . 00 0 . 1010 0 . 0980 0 . 7440 0 . 9429 0 . 0724 0 . 8705 21 . 89 370 . 00 a . 0980 0 . 0948 0 . 7957 0 . 9884 0 . 0749 4 . 9135 21 . 91 380 . 00 0 . 0948 0 . 0951 0 . 83b8 1 . 0267 0 . 0767 a . 9499 21 . 94 390 . 00 0 . 0951 0 . 0959 0 . 8716 1 . 0626 0 . 0783 0 . 9842 21 . 95 400 . 00 0 . 0959 0 . 0971 0 . 9044 1 . 0974 0 . 0798 1 . 0176 21 . 97 410 . 00 ' 0 . 0971 0 . 0973 0 . 9363 1 . 1307 0 . 0813 1 . 0495 21 . 99 420 . 00 i 0 . 0973 0 . 1562 0 . 9668 1 . 2204 0 . 0826 1 . 1378 22 . 00 430 . 00 0 . 1562 0 . 2168 1 . 0517 1 .4247 O . Q861 1 . 3386 22 . 05 440 . 00 0 .2168 0 .2193 1 . 2449 1 . 6810 0 . 0937 1. 5873 22 . 15 450 . 00 n � �-- 8/31/00 3 :43 :5 pm Pacific Engineering Design Inc page 8 Taco Time - Renton Project No . 99030 LEVEL POOL ROUTING TABLE LEVEL POOL ROUTING TABLE I1 I2 2S1 SUM O1 02+252 STAGE TIME <---------------------- cfs min ---------------------> (ft) (min} ----------------------------------------------------------------------- ----------------------------------------------------------------------- 0 . 2193 0 . 3057 1 .4850 2 . 0099 0 . 1023 1 . 9076 22 .27 460 . 00 0 . 3057 0 . 3937 1 . 7951 2 .4944 0 . 1125 2 . 3819 22 . 43 470 . 00 0 . 3937 0 . 3989 2 . 2557 3 . 0483 0 . 1262 2 . 9221 22 . 67 480 . 00 0 .3989 0 . 2873 2 . 7600 3 .4461 0 . 1622 3 . 2839 22 . 94 490 . 00 0 . 2873 0 . 1736 3 . 0542 3 . 5151 0 . 2297 3 . 2853 23 . 09 500 . 00 0 . 1736 0 . 1743 3 . 0554 3 .4033 0 . 2299 3 . 1734 23 . 09 510 . 00 0 . 1743 0 . 1650 2 . 9584 3 . 2977 0 . 2150 3 . 0828 23 . 04 520 . 00 0 . 1650 0 . 1562 2 . 8800 3 .2012 0 . 2028 2 . 9983 23 . 00 530 . 00 0 . 1562 0 . 1567 2 . 8169 3 . 1298 0 . 1815 2 . 9483 22 . 97 540 . 00 0 . 1567 0 . 1324 2 . 7795 3 . 0686 0 . 1688 2 . 8998 22 . 95 550 . 00 0 . 1324 0 . 1079 2 . 7433 2 . 9835 0 . 1565 2 . 8270 22 . 93 560 . 00 0 . 1079 0 . 1081 2 . 6889 2 . 9049 0 . 1381 2 . 7668 22 . 90 570 . 00 0 . 1081 0 . 1089 2 . 6306 2 . 8476 0 . 1363 2 . 7113 22 . 87 580 . 00 0 .1089 0 . 1085 2 . 5764 2 . 7938 0 . 1348 2 . 6589 22 . 84 590 . 00 0 .1085 0 . 1086 2 . 5254 2 . 7425 0 . 1335 2 . 6090 22 . 82 600 . 00 0 . 1086 0 . 1040 2 .4768 2 . 6895 0 . 1322 2 . 5573 22 . 79 610 . 00 0 .1040 0 . 0994 2 .4264 2 . 6299 0 . 1309 2 .4990 22 . 76 620 . 00 0 . 0994 0 . 0996 2 . 3697 2 . 5687 0 . 1293 2 .4394 22 . 73 630 . 00 0 .0996 0 . 0991 2 . 3117 2 . 5103 0 . 1277 2 . 3826 22 . 70 640 . 00 0 . 0991 0 . 0998 2 . 2564 2 .4554 0 . 1262 2 . 3292 22 . 68 650 . 00 0 . 0998 0 . 1000 2 . 2044 2 .4042 0 . 1247 2 . 2795 22 . 65 660 . 00 0 .1000 Q . 0899 2 . 1562 2 .3460 0 . 1234 2 . 2226 22 . 62 670 . 00 0 . 0899 0 . 0798 2 . 1009 2 .2705 0 . 1218 2 . 1488 22 . 59 680 . 00 0 . 0798 0 . 0799 2 . 0291 2 . 1887 0 . 1197 2 . 0691 22 . 56 690 . 00 0 . 0799 0 . 0805 1 . 9517 2 . 1121 0 . 1174 1 . 9948 22 . 52 700 . 00 0 . 0805 0 . 0800 1 . 8796 2 . 0401 0 . 1152 1 . 9250 22 .48 710 . 00 0 . 0800 0 . �801 1 . 8119 1 . 9720 Q . 1131 1 . 8589 22 .44 720 . 00 0 . 0801 0 . 0807 1 . 7478 1 . 9087 0 . 1111 1 . 7976 22 .41 730 . 00 Q . 0807 0 . 0802 1 . 6884 1 . 8494 0 . 1091 1 . 7402 22 . 38 740 . 00 0 .0802 0 . 0803 1 . 6329 1 . 7934 0 . 1073 1 . 6861 22 . 35 750 . 00 0 . 0803 0 . 0809 1 . 5805 1 . 7417 0 . 1056 1 . 6361 22 . 32 760 . 00 0 . 0809 a . 0804 1 . 5321 1 . 6935 0 . 1040 1 . 5895 22 . 30 770 . 00 0 . 0804 0 . 0805 1 .4870 1 . 6479 0 . 1024 1 . 5455 22 . 27 780 . 00 0 . 0805 0 . 0708 1 .4446 1 . 5959 0 . 1009 1 . 4949 22 . 25 790 . 00 0 .0708 0 . 0606 1 . 3957 1 . 5271 0 . 0992 1 . 4279 22 . 23 800 . 00 0 . 0606 0 . 0606 1 . 3310 1 .4522 0 . 0969 1 . 3553 22 . 19 810 . 00 0 .0606 0 . 0606 1 . 2610 1 . 3822 0 . 0943 1 . 2880 22 . 16 820 . 00 0 . 0606 0 . 0607 1 . 1961 1 . 3174 0 . 0918 1 . 2256 22 . 12 830 . 00 0 . 0607 0 . 0607 1 . 1361 1 . 2575 0 . 0895 1 . 1679 22 . 09 840 . 00 � .0607 0 . 0656 1 . 0807 1 . 2070 0 . 0873 1 . 1197 22 . 06 850 . 00 0 . 0656 0 . 0711 1 . 0344 1. 1711 0 . 0854 1 . 0857 22 . 04 860 . 00 0 . 0711 0 . 0712 1 . 0017 1. 1439 0 . 0840 1 . 0599 22 . 02 870 . 00 0 . 0712 0 . 0706 0 . 9769 1 . 1186 0 . 0830 1 . 0356 22 . 01 880 . 00 0 . 0706 0 . 0712 0 . 9536 1 . 0954 0 . 0820 1 . 0134 22 . 00 890 . 00 0 . 0712 0 . 0713 0 . 9323 1 . 0748 0 . 0811 0 . 9938 21 . 99 900 . 00 0 . 0713 � . 0707 0 . 9135 1 . 0555 0 . 0802 0 . 9753 21 . 98 910 . 00 0 . 0707 0 . 0714 0 . 8959 1 . 0379 0 . 0794 0 . 9585 21 . 97 920 . 00 �.� yy . y —r- � - � �� � � PACIFIC ENOINEERINa �E31QN INC. � � �e.�4' � t��1�' ����:���,.; M ; ;� ,f.� CIVIL ENGINEERING AND PIANNING CONSULTANTS ��� I �F I � I �, y� .��� cucuu��n er �, �.��•.•��—�= ave , _ .. _. _ _......_�'�1`��� ��.�`�a�--�'�! ..;.`�►'�1�.�.�E..-�'4,`�E�z+�..4�....,..... .�'� 4 �t'�L�..i� ......: _ ; _ . .. _ _._._ . ..._ _ _ _ �'=�t4h�....._ 'G.�_.�'� ��4! , G� _� C� ��'��_ 9`G . _ _ ... — -- -. _ ...--- --- _ _ r _._... _ ......._ _ .._., .., ..._ ._. _ ..`.. ' .:... _ : - �-� ---� �-�-- -.._.. -- --.... _ .._ -- -... : _....:���'"'31�,�r��G ; � ���.���•�°t''� .. _... . _.... _ _... .. _.. __ -.. _ , _ .... -- '._......� ��.t,�:..�'�a��*.�'-,�� ...��'P�� ���.. .�'r'�E..v �'�� i'���; t °/a b� �;,o�,'�"�.1'�U'�'►�.�c� . _Ir��� ���,..�� r�.�'c� _ : ..._ . _.. ....{.��. �• ` ... >..... .. . ._._ ._....------ --......;........ _ _.. ___ �_ � ��-. �t!�J t .C'�Q� ���� � �'�_ C�.r�C..� ���'' �`` �(c..� : , �1&�3�` ��.'��St7 y�. --�.6.r`��i�►�E��........ F._.... _ ..f.._.:......, .. . ......._. �. ...... ._.... ._ ..._..... ._ __ .._.. . .. ._.. _...._ _... ... - �. . . .__.. .... __. .....:. ....._. . . . ._... . . ...... ...... . _ _ .... _ _. .'. ':�%__-�-�J�a�.�. . �o�:��vt� �k.. :_;-tcx.j':._ �3��.'�. �r� '�'� `��'�..�`�...,_ . . , _..._ :�-:'�.��_� u��J�.__��'�.:.T,-r-� 2��, r���, ; _ ._..:_...... . ;... . _ . ... _ ° .._ ._.I _...�.'��s �_":,��� � . �.o f E c.���� � b�g� ._.._ ;_..._ ��4�,�.,� .."rktE:..W�'�t�Wa��._ c`�.�� � �. ..����k.f��. ������'.�` _ ..._ 5 t.3�.a� .�� 4� Co� I i.� �4�. `�`��E� _....: .: ....._.....�._....,..:.�.... . . . __. ._. _ . .. .. . _ .. . . G�.�,,,.�� _..._._°....:.. .... - ---..�._.._-��-�---._:. . _ ._ .. _ : ^ , :.. ... � . ..:... : 1� � '��:� =� O.� o`��� �� �... ��G�`�:.._.._._ .... _ .._._._._ _: ._........ - - —._.. . c� ...... _ . _ ta .._ , L- � .. ... :.. _. _. .'�� G.',flEp~'�'3 � ���>` �^�".;�. .. � �J�' ��' �E•�• "�`a.•�^� : 1-'-LS�lD� ......._. .._...... . _ , .... '+- . __ ' 'r ' _. ;._.__ ... ,..._ __ ,_.. __ . --'' ' _ _ f..,� ,_ _ ,._ _ _ , _ ..... , ....... . ._ .. ilOf'l!-1 C �1 OOTLJ CT CI IITC '�CI'l CC/�TTI C \A//�CL-lli�lf=`Tf'll�l OC7� Qq '�f-lG'//1'�'I _��7f-1 C/�Y//1'7-1_�07r-. 8/30/00 1 : 28 :32 pm Pacific Engineering Design Inc page 1 Taco Time - Renton Project No. 99030 BASIN SUMMARY BASIN ID: WQ NAME: WATER QUALITY SBUH METHODOLOGY TOTAL AREA. . . . . . . : 0 . 73 Acres BASEFLOWS : 0 . 00 cfs RAINFALL TYPE. . . . : TYPElA PERV IMP PRECIPITATION. . . . : 0 . 67 inches AREA. . : 0 . 16 Acres 0 . 57 Acres TIME INTERVAL. . . . : 10 . 00 min CN. . . . : 86 . 00 98 . 00 TC. . . . . 5 . 00 min 5 . 00 min ABSTRACTION COEFF: 0 . 20 PEAK RATE: 0 . 06 cfs VOL: 0 . 02 Ac-ft TIME : 480 min �'�,� �. �I � � � V. C�NVEYANCE SYSTEM ANALYSIS � DESIGN Considering the small area to be developed on this site, and the simple piping system, by inspection the conveyance system is adequate. Check: A = 0.73Ac Pervious = 0.16--► C = 0.25 } c = 0.75� lmpervious = 0.57 --► C = 0.90 P�= 3.4"/hr, iR = aR(Tc) �R For 25-year storm, aR= 2.66, bR = 0.65 Assume T� = 6.3 min. iR= 2.66 (6.3} �.65 = 0.804 Ix - P25�R= 3.4x0.804 = 2.73 Q = CIA = 0.757x2.73x0.73 = 1.51 cfs The flow going into the detention vault is split between two pipes, with the least slope being 6.54%. QF= .463/n d�s'"� _ .463/.013 (1)�(.0654)12 = 9.11 cfs > 1.51 cfs ��� � � f ' � . � � � � � n• ' 1 f��T ����. � y l,� . �'�����1+�'��,;,�����������' � �!���� � -�' '�`. _.�`�r j `� � �J`� , � �,' '1 -*��I � J�`.��� � � . .- � � � � ���l��t, ����a �- �� , . �Gr��.�'�� � �..�� �', ...ir1F■.-s�� ���1i '7 ��� �. ���w�� � , � �L �� � o �����.��.� ���C� ���� , - - �,�— � � � ��,�) . �� � 1� � ��•'�' �� =�� ���..,�' �� � f�► ��,�+ � ���`��; rw-« fl►1��� `�J � ..� � ��• � ,�� � �� � :��_...I��!/_��, � ���P .� � ,.. - --., �� :� � � . �!�! � �::��. � ��es �1��! �► � . ro�•� �r� r Ef��w�.�i��r. �' `������ � ��� � .`' - �:_�•-����,� ��,�� � .�,�� � � ,�.� ► � �, � . \��'�� _ '� '�`��• .�������t�.�� ■, ! �' =.��, �� '� ���s �3. .+�'�� �i� � ��� �;�i�r ''�`�'i��V.�.- „����. �� �r� �' r � � ��� . ►� , �� . f �/' , � �� �,,����,� '� ���� �i��` �-� ��f��� -- � (r��,��► ., t•1�., �� � � � � 'I � ,•�^� ��� : �,, ,,�j , - � .. _�. t � . � . �� � �� � � � � � , �,�, �,�� - r���►�.�� , .:::,��� �. � ti�:�,y,�� , �j�i���►.. � , � ., a.�� ., � � . _ r � ►� �1,�, �,..� �► �-�, ��;�� !��� _-� �'�—�"'-=� -� `t � Ij ♦ \ Y ,� � �� .�'�i� � �Ik ".�� ` _ ��� � �— T� '�, ��� ��I L''ir�:_ ` � _ � � � ' � � � i► �•♦ � .i { � � �� � �� �, � � � �\. �,- �� ��� � � �� . � � r ' ������ � �� . v���'��� � �i � t. � ��� � �. ' � � � � '� .. � it � � , � �,�� , �E ._��� \w i�` r' ��=lE� �� ����f'`� • �� � �_���1 '�� ������ �'�!i�l�, , �-,�� �� �. � 1`���1�1 �� "��� � ' � � �' � � 1 _ +°1 � � .� � ���� ����� , � � i,y , �� � � �il��� '� �s- �� � , ���j,�� ���a��c�►.�� � �I� �: �I��- �� ' � � � � � �� � �:, �(— � � . � L ..� � ���� ; ;�� ��� ��,� � , �� r: �� „-- R� , .,� . � �� � . � � , � ; � .� �� � �� , = �I�:������', ., - . - , . . . . . , . , �. ��IEt�.��'�!��� - � - w�r�.����� _ � , , . . . ��.w� �r���' , `�I�-' . • • ,,,� � . - . � _ . , . - �� VI. SPECIAL REPORTS & STUDIES Not Applicable. i�, P:\Project Files19903019930 drainage report.doc VII. BASIN & COMMUNITY PLAN AREAS Not Applicable. �� P:\Project Files199030\9930 drainage report.doc VIII. OTHER PERMITS Not Applicable. %1 r� P:\Project Files�9903019930 drainage report.doc 1X. EROSION/SEDIMENTATION CONTROL DESIGN A. Approx. 530 LF of siit fence wili be instailed along the south and east perimeter of the site to prevent silt laden water from exiting the property. B. A 24' x 100' x 12� rocked construction entrance consisting of 4Adia. —8°dia. quarry spalls will be installed at 2 locations. One at the the west entrance to the site off Rainier Avenue South. The other will be Iocated at the proposed north entrance off South Second Street. C. The existing sediment pond located in the southeast area of the site will be cleaned and utilized for storage of interim storm runoif during construction. A check of tfie sizing calcs for a temporary sediment trap show tha#this pond is more than adequate for this site: Per K.C.S.W.M. 1990 (94 Update) Section 5.4.5.1 Required Surface Area = 2 x Q�/0.00096 Q2 = 0.111cfs (Per Drainage Report) 2 x 0.1110.00096 = 229.17 SF Surface Area Required = 229 SF Ex. Surface Area Provided = 1900 SF The existing riser pipe in the pond will be used for overflow control. This pipe connects to the existing 18" storm line in the Safeway planter strip just east of our east property line. Approx. 430 LF of Interceptor `V' Ditch will route silt laden runoff to the existing sediment pond. ;��, . X. BOND QUANTITIES WORKSHEET RETENTIONIDETENTION FACILITY SUMMARY SHEET AND SKETCH, AND DECLARATION OF COVENANT Not Applicable. i �'� , � d ' !X. MAINTENANCE & OPERATI4NS MANUAL � Not Applicable. � "r ���