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I . . - � I -,46, ,-�.. ; � .1-110 1"�Q crv;zr-� 4 1 =,,7 1 i �� , I . NOTE: SAWCUT. & APPLY TACK . st I B AS". w11B COURTS . � :� .� � ; . . 8426 188th Street SW . t .. I .__1 ,I ; .. . cws t>000r -Npi�,� I C,t�;) I . ./ ZI .. .. ... - p � . I I -I... I /� , I . . 3 MAX* EXISTING PAVEMENT SURFACESO . 1. . __ . f . � -11, . . , /0��zz-1011�/0100._�zo� 1�1 * . . 17 .� : . . - .�%j . .. .,A- ..-...- 11e, . . �. I / . : . 1 . -j I -1 - . ,;; I I/ .,_� I I - . q it � I : I . � ,e , . 4 % . -m� :11C -A .� / . I'll � I- �_ _/ : , ��Nr .: I . . -/ - , . . I r � 1-11 � I ON. � 1� . Fw:�w - . , %) I � A13, 1 ; I �, I I! IF 1� .d�Z ' , I � VARIES 5' VARIES VARIES . . N-) -S-0 I L. czIRA4.,r)r--� . . �%. 010 co 7 . I - . 'A .j k . I I - No - - - I . . � I � I : . - . . 1_1 . . . . . ��Ey I c.;.=- ( 102� LE6AL ESGRIPTIONI _� � . ff. . .. . � . �,�o . � - . , , . . . .. .% ., , , " _. . �. - ..' -- � I ; PATH 3 MAX@ ". .. . - I - - - I .. 6�/ ., // -�.-., "11,-_-.1 �.. ..., ".. .1. . . . '. I . ".,. ...._,�1�11.�". .."�"'110 -..'��.. I.. .;:�-�l : . � a �1�1��,� .. , , " " ... 0 .10'0 __1111111111 --- ______ I . - : - ,� I ., "I, .."...'.... � . . . 11 . , ,..e��, " .m. � _ , ,.� . c� .1 � .i PLANTING PER L1_ i�s F) . . � � / 1, " - I I . .� � a . . � , I I I , / .,.-' - " _�, d 461, - L..j &mm,,.....,j . 1%1j ; 0 Ck:: _� ffiffffiv . . LANDSCAPE PLAN- . ;f,//zy5r (12 lzovez2g . m . 11111111 = . � . .. .. .. , . I , . I 41111100' .. . .0 ." , I . '. .. . . .. .-.a � ..: - I. ... � ...4 .. - . � k . '\ 11,1111111,oll i . Uj 1 0 .. ., ... ... - �.. I I . . . 1011, /,= 17��,%Jjj *Iwl� 1..,i 'Z\ I i I 0 . �ow PARCEL A: 111111111111 L LEVEL , . 4 Om . . 11 % % 1. 11-*14�5,7- AIP�=-: . ; 0 1 lc� 1 `CZ6. ciao <1 . 1111 � ___ - - ____ - - ... N%%j BOTTOM LJLJI . . 4a : Qk zm lcz� oz. ,a . ,I 12 to cmp 0 . .� L� 7 Vt/ 7' OA4 .-�-� THE NORTH 315 FEET OF TRACT 22, EDMONDS SEA VIEW TRACTS ACCORDING TO THE FLAT . _`oo"""` I h� � �� - I of. I. :. . <a . 4zi . mmw� . . 4z IQ6 . I - - . .. %% .. % A.j /c:9 41 . p ; / /\ %/ /\ Y 0 _�'' 41 f I I - -_ - I /o . I I . % � . � THEROF RECORDED IN VOLUME 3 OF FLATS, PAGE '16, RECORDS OF SNOHOMISH COUNTY .1 � 1% 111.0 I N � ; �� , � _� �, I I / I . . ... z I . : . 77 � : .. I 11 I -�, ,% " : - � . . fit . . . i. � ;� / \ z 1% �� : � . 16-OASHINGTON I . I � . . 1 ". . ". 1 1 .1� . . . . I � ''1111,1111 . 10 1 5 Mt'�A. I il fill 11 1� 11,� I ; 5 MAX. . - . Z ASPHALT CONCRETE - ; : <________00TLer *= -.. DATE . i I /f,\/ /,.,'% / . , T4 PARCEL 5: . . � 211 ! I . COMPACT SUBGRADE TO . CL. 8 . . ! 4`0 . . �.. . �� I - : I - 2 1 . . . . � . -I � 95% MAX. DRY DENSITY, . I I LOT 113,, EXCEPT THE NORTH 23120 FEET OF THE LUEST 21OA3 FEET: - - . . � -SEE LANDSCAPE . I- .---- 2" CRUSHED SURFACING . � - _.r�'��_ 11 � . � . . .. w ."r ! PLAN FOR PATH PROOF ROLL AND REMOVE . LOT 20, EXCEPT THE NORTH 1350FEET OF THE �A,��T 100 FEET AND EXCEPT THAT PORTION " , . 1. . � : I . ,4% = � " t . ib :94477- --fw::6--" . . .. I 10.1 w jor .. %.. .",.-� . 1. "Y.A. - ,�._ I .� � . . I "I ! SECTION AND REPLACE SOFT AND/OR . .� - ; %. %� ft I OF THE E*45T 150 FEET OF SAID LOT 20,,'LYIN NOF;�TH OF A LINE 8 FEET NORTH OF THE . I.. 4.. �. ,.#� -� 1., 11� � .m . . I - .. -.1 . . . I . . . . % . j__3 - b . .. 1: _8UErtALTE:,mi, ., �. ! I.,:. . ;V CR : . op SOUTH LINE.. AND SOUTH Cf t4,. LINE-13$, FEE;,,.SOUTH`OF THE NORTH LINE: 18 11 '41t - . '. . ORGANIC AREAS WITH USHED SURFACING - � " _ . , .�. - . .11. . . . I .-V - . .. , .. . I I .1 . . _r . " .. 4!� \1/m . I 11 1. . .�jw �! �t: 41;r. , .k�-" 11 ! 'I � . < � 3 Y2 a6 . , . i�: �.,t 1.1� -0- :,.... ,7: I -..,- - - : � ��l . . FACING. BASE COURSE : I �-. . �,,-. '�� If d_ ;., 7p . ; . Qw 1�., . - V'. i�, I . . - - 4�1 . I .. .. .. . - i . ,� . . . . . .... L��V_ ., 'j�' .. .,� 8. . - ! -, . 64 % 197 PARCEL C: 1"! ��i_�, V. : - - DRAWN BY,.; GMH - V., 4 ww"�Vo"` . I ! . : I _. i-� .. 1 1� I ",;m 4� ; - _� ��Ivft .., . - 4 � .. � , ': - . . <::��Iflcr___ . _�14��. , --L. w ..... '. .. i . � d.- ' -! , I .* . _ Z' *I-- -;, �i .. t�111 - 4 . - CHECKED BY : GMH LIA . i . . . . , . p ""' !��'�'� �� .,,�a,7 �77 � i . %4 THE NORTH 20 FEET OF THE 5AST 202.1 . � . i %, *%Iz � DS SEA VIEW TRACT5? t . . .. . I m I . I . . . I ACCORDINCz TO THE FLAT THEREOF,, RECOR.DED IN'VOLUME 3 OF FLATS., PAGE 16'RECORD:7 : I - I 4 -1 - - - 11- . I I ; . ,_ . . I . ! . " SNCHOM15H COUNTY, WAB 4-NGTON. � . : . . ; . * .4'� . . Or dm.� .:� . " . .! . . I & . , x 6 . I . . ; , . Q% . - "; - . . , , . . . ; . ! 71 . .. 1� ,�! 1� . . I � . 41�� 1.-,:.� I EL as � I ! JL a . . a . .* _ k� !?�� I fL) N& a - . . . . . SITUATE IN THE COUNTY OF'SMOHOMISH. ST�,ATE OF WASHINCzTON. w%m �m . I m" . i 1� 4 `� ..: ", � Imm :- .. � % r% .0 c ; ,I'- .. _. , ��! . . I - 1b :� 't�...� .i " . . " . I k.0% - � ,&_ � � -,: ... 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I I . � � . . . . . . . . I .1 .1 . , , . , - .. . .. . . M �J S f i F Drainage Report For Se view Elementary Basketball Play Area Edmonds, Washington Permit Submittal September 18, 1998 V � d I EXPIRES 1/18/ 95 � • Prepared for: Edmonds School District #15 Prepared by: SvR Design Company Address: 1008 Western Ave. #301 Seattle, WA 98104 Phone: (206) 223-0326 SvR1 98055 C JL a 1 C t.. 1 c • t v ure with a 8Y2" diameter orifice plate connected to the 12" outlet pipe in sufficient peak flow rate restriction to meet the city's release requirements for the site. See attached detail. The existing drainage feature Swale (DRNGFEAT) is sufficient to contain the nominal storage volume resulting from the controlled the release rates. Result Summary The existing condition parameters used for the field basin runoff analy in the Drainage Report for time of concentration calculation for the basin and curve numbers were used again, however, ally defined sis were initi Seaview Elementary, Permit Submittal., dated June 20, 1996. The basin limits were modified to account for a small portion of the original basin vvh a Overview Edmonds School District is proposing the, construction of a new basketball playing area at the existing Seaview Elementary site. According to the City of Edmonds Storm Water Management Ordinance, the site must meet existing peak runoff release rates for the 10-year and 100-year storm events,, Per a discussion with a City of Edmonds engineer, there are no stream erosion r v � control restrictions for the 2-year storm event since the site outfalls to a closed City conveyance system. The calculations from the Drainage Report for Seaview Elementary, Permit Submifttal, dated June 20, 1996 were used to determine existing conditions and supplements this report. Several basins combing to form the outfall from the site. See attached drainage basin map. The new basketball play area is proposed in the field basin. The field basin combines with the runoff from the drainage feature basin. The project proposes to place a flow restrictor in an existing catch basin, identified as Structure 15, at the outfall of the drainage feature basin', to compensate for the additional runoff from the field area.h�Accordin� to our calculations that follow., a tee fitting control struct CB 15 will provide s ich bypasses • 1 L the drainage feature. The basin area parameters were adjusted under proposed conditions to account for the addition of the basketball court pavement. See attached analysis. The total drainage feature basin is a combination of five sub -basins. Four sub -basins were defined in the Drainage Report for Seaview Elementary, Permit Submittal, dated June 20, 1996 and one newly defined field basin (FLDA). The computed hydrographs for sub -basins CB 13 (area near CB 13), NWVV-RF (northwest side of west rood, PLAY (combined play area), SWWRF (southwest side of west rood, and FLDA were combined to generate a total hydrograph for runoff reaching the drainage feature. The only sub -basin modified under proposed conditions is the FLDA basin. There are no changes proposed to the other sub -basins. The modeled release rates are shown below for the existing 12" outlet pipe (12"PIPE) and the proposed tee fitting with a 8Y2" orifice (ORIF), j IL 0 'W + Drainage Feature Sub -Basin Runoff Analysis: 10-yr Existing Cond: 100-yr Existing Cond: 10-yr Proposed Cond: 0 100-vryProposed Cond: 0.65 cfs L29 cfs 0.65 cfs 1.23 cfs 1 ne anaysis, snows inaL unaer proposed conditions existing release rates are matched for the I O- yr storm and reduced by 0.06 cfs for the 100-yr storm event. These results indicate that the city's ments will be met with this proposal. fldmg.let.'.doc . release rate require File: 98/98055/bba 3 a a 4 11 r i t r a i r � 1 3 r ti o F V, u FIGITR.E 1 - VICINxTy A/1AP PL 7 114TH IS P% ST �1 . cy.� • — . . i.q! t . a • F !. .y.F. wi �� ... 4. w..I t • - • + R i . •� •� r!. * dl Mrw�, I T iFl: t i* • # L�C1fT' '*. Sw 41 4.. N 04, � 186TH 7%j 0% 10 ::c 1% Or IF :m A pX :9 181S" OLrpW MA Iwo 13Z Lim 'a X1 RIM IF 11 PL 41 sw alllibmbo- ad.. Rim A r rr i. ,F •....rr • F ! 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' MW a w f Sw s T F SDI' It K ALDER T Rom+ 2 I CEDAR T q -PXU � � T er .... a SP4roz;JC # RD 'v� + " r 7 I x Sw a .+ st &'+ l *, 14 S Z ,. Z15T S3 14TH T w i T :mb ow115 PL 21 old Im rEy :lob -w-mmmp� �r30 + �Y w soMOCRIAL 1 l . E04Ma C tmi ry COLLEGE aX LEG E KAC SW �+ S Na d RIVE l OIST ., 20 2 Sw 214rr# Sr T 0m r.F:r jr( T9 ST S 201SI 203RD Ft Sw ..04 TH T 20 H ST SW. ZVI 9 �,..�..... ol _ ;.. ..w 20WH t ST T SW , CL Q,, PJC 2 to 0 I rn � Ill • p son T 212T lo ]TH PL SW lST 0 . Ir e w FIGURE 2 - TOPOGRAPHICAL 1\/LAP dp OF + / 0 l � Area r i # i +t5�— licems i *I p a s — r e - i ip rhf 4 -.OP a4�- # At moft"W S A f k a ' f q, # FIGURE 3 -SOILS MAP USDA Soil Survey for Snohomish County Area classifies the soils in the vicinity of the site as 4 Alderwoodw Urban land complex, with 2 to 8 percent slopes on the southeastern portion of the site and 8 to 15 percent slopes on the northwestern portion of the site. 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F I ■ I I • C r r IQ 46- 1413 Cy-j + a f � Q346N C CD h—v a �t ity,•` .....� .. . ,� � � .. .�-� k { + a CD Pk�j d C3 Ell Lin + F y T ��_...._ .��Y, +. ,W a_i. �,� _.+a..r._r ._ ....� ii'f •�_._ ._� Y,�� ++�—_� .a_�_Yy �w�i-,i�r�r }_� Y+CID i TT ieaL � _rt ,f _ � r — • T — __ r�.+.w r__ f _ +aa• t, t.� +�_ � ��_ a. ira r+r • E_a { _wr r -- _�. 4,00 Rev Al 4..,wF iT�r �..wr anlW • t ,� fnw • • a a # 0 i Date 91'n118 � Project SeaIviatooem.4a.�a,�� ... DESIGN C O M P A N Y Civil Engineering jobg 980S Planning Landscape Architecture page of ❑ Phone Lag Individual Organization Area (ode/Phone Fax ❑ Fax [pages] From; ❑ Memo/Info ❑ Meeting Notes: To: El Field Visit �'l,e-• _ Designed By J — Checked By Subject: '�S i � �(�( S� Mods 'ec� FIEI! SjAa� rowle � ae,%ecL cerwi no.�••a ^ �c r', I Aul 44A es U � J twoo Atlr nb FLU -A Tam A.-c� = i�TL 2.87 Ac 1, 4AF* A C. mom 'm�w V'O vas fk`eo.. = 03S A c � r4v4CM 89 __P2r��a.,s Ar�ar� = Z•8 7 — 0.35 = Z.5 q� �v;o„s C N3 Unz VVUI Ou"rivlv%W�L (5- C-OO 4 Uor a OON Q ro_ ¢.j COAci i 1 Jib f = Ov2Z Ac q rAWit +o.zic. �i —0.4 3 Ar _. �Q-�_ Oa,,,,a�: t� = �a.2z X 89 � 0*23 x 98� � 93 _ re4e,V$... ovj_ /%rea = 2.87-0.43 = 2.4q_Rc � J Action Required: 1008 Western Avenue, Suite 301 Seattle, WA 98104 Phone.-- 206.223.0326 Fax: 206.223.0125 email: svr@svrdesign.com . ■ 4 Ln M7,00 CID Ln L" C007 0 0 J r 9/18/98 1:58:44 pm SvR Design Company page 1 r NEW SEAVIEW ELEMENTARY New Basketball Court Swale modif ication Basin: PLAY1 SvR N. 98055 7�* �! fib i �Yif i•Yhf i iiri iYi i�� i �i �� ► �f _` �� ! �i �E �F �i � 1�l� iE #!� i � i i �I�if �E �! !r• i� �!� �T! �� iiir !!r! i•!f �� i �i rl� iiYf �� iy i� � i� irk !i I!� �F �••r! �� E ii �! �� 7TE � �� BASIN SUMMARY � � i � � � � � � � � � � � � � � � � �� 4 �! � i•ii iYii �i �!! �! ii� i•Y� �� ! �M !! �F #*E �M �f i �F �!! �M �� #�� i•iF ii� YYf il••if �� i4E �••••M! !�f iiif iiYf� � � $ASIN ID: CB1310 NAME: 10 YR NEAR CB 13 SBUH METHODOLOGY TOTAL AREA....... : 0.25 Acres BASEFLOWS: 0,00 cfs RAINFALL TYPE.... : TYPE1A PERV PRECIPITATION.... : 2.00 inches AREA..: 0. 1a Acres TIME INTERVAL.... : 10. 00 min CN a 0 86,900 TC a 9 5.00 min ABSTRACTION COEFF: 0.20 TcReach - Sheet L: 34.00 ns:0.0110 p2yr:' 1.50 s: 0.0060 PEAK RATE: OL-6 O� f s VOL: 0. 02 Ac-f t TIME: 480 min BASIN ID: CE13100 SBUH METHODOLOGY NAME: 100 YR NEAR CB13 TOTAL AREA.......: 0.25 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE....: TYPE1A DERV PRECIPITATION....: 3.00 inches AREA..: 0.10 Acres TIME INTERVAL....: 10.00 min CN 86,oOO TC9 5.00 min ABSTRACTI.ON TcReach - PEAK RATE: BASIN ID: COEFF: 0920 Sheet L : 34.00 ns:0.0110 p2yr o.11 cfs. VOL: 0.04 Ac-f t FLDAO 1 OE NAME: 10 YR Field SBUH METHODOLOGY 'DOTAL AREA.......: RAINFALL TYPE:...: PRECIPITATION....: TIME INTERVAL....: ABSTRACTION COEFF: TcReach - Sheet L: PEAK RATE: 0.25 cf BASIN ID: FLDA010P SBUH METHODOLOGY 1.50 s:0.0060 TIME: '480 min IMP 0.15 Acres 90.00 4 5.00 min IMP 0.15 Acres 90400 5.00 min to Drng . Feat. Ex.' 2.87 Acres BASEFLOWS: 0.00 cfs TYPE1A DERV IMP 2.00 inches AREA..: 2.52 Acres 0.35 Acres 10.00 min CNO d 86000 89.00 TC 62o77 min 62.77 min 0.20 34.00 ns:0.0110 p2yr: 1.50 s:0.0060 VOL: 0.21 Ac-ft TIME: 490 min NAME: 10 YR Field to Drng. Feat. Pr. 1V1HL ruca.�.. 0 �.+si acres rsti5�r'i.,uw5: u a vu cis RAINFALL TYPE....: TYPE1A PERV PRECIPITATION.... : 2.00 inches AREA.. : 2.44 Acres TIME INTERVAL:... : 10,0 00 min CNO 0 0 * : 86900 TC 0 0 0 0 : 62.77 min ABSTRACTION COEFF: Oa20 TcReach - Sheet L: 34.00 ns:0.0110 p2yr: 1.5o s:0.0060 PEAK RATE: Oo28 cfs VO0.22Ac-ft TIME: 490 min IMP 0.43 Acres 93.00 62.77 min n a 7 • 4P � t s i 4 ' i + 9/18/98 1:58:44 pm NEW New Basketball Court swale SvR Design Company SEAVIEW ELEMENTARY modification Basin: PLAY1 SvR No. 98055 BAS IN SUMMARY BASIN ID: FLDA100E NAME: 100 SBUH METHODOLOGY TOTAL AREA.......: 2.9 87 Acres RAINFALL TYPE.... : TYPE1A PRECIPITATION.... : 3.00 inches TIME INTERVAL.... : 10, 00 min ABSTRACTION COEFF: TcReach - PEAK RATE: BASIN ID: Sheet L : 0.57 cfs FLDAI 0 0 P SBUH METHODOLOGY TOTAL AREA.......: RAINFALL TYPE....: PRECIPITATION....: TIME INTERVAL....: ABSTRACTION COEFF: TcReach - PEAK RATE: BASIN ID: Sheet L: 0.50 cfs NWRF 10 SBUH METHODOLOGY TOTAL AREA.......: RAINFALL TYPE....: PRECIPITATION....: TIME INTERVAL....: ABSTRACTION COEFF: TcReach - PEAK RATE: Sheet L: 0.02 cfs YR Field to Dfng Feat. Ex BASEFLOWS: 0.00 Cfs PERV AREA..: 2.52 Acres CN# 86.,00 T C 62.77 min o.ao 34.00 ns:0.0110 p2yr VOL: 0.40 Ac-.Lzt NAMES 100 vp Fi 1.S0 s:0.0060 TIME: 490 min _ _eld to DrngFeat. Pr0 2.87 Acres BASEFLOWS: 0000 cfs TYPE1A PERV 3.00 inches AREA..: 2,44 Acres 10.00 min CN# 0 4r 086.00 TC16 * a 62.."77 min 0,20 2 IMP 0.35 Acres 89,000 62.77 min 34.UU ns:U.ollO p2yr: 1.50 s:0.0060 VOL: 0.42 Ac-ft TIME: 490 min NAME: 10 YR RUNOFF NW OF WBLDG 0.07 Acres BASEFLOWS: O.OO cfs TYPE1A PERV 2.00 inches AREA..: 0. 00 Acres 10. 00 min CNN 19 0 86. 00 TC 0. 19 min 0.20 34.00 ns:0.0110 p2yr: 1. 50 s:0. 0060 VOL: Os-01 Ac-ft 4 80 min TIME: BASIN ID: NWWRF100 NAME: 100 YR RUNOFF NW OF W8LDG SBUH METHODOLOGY TOTAL AREA.......: 0.07 Acres BASEFLOWS: 0. 00 cfs RAINFALL TYPE....: TYPE1A PERV PRECIPITATION....: 3.00 inches AREA..: 0.00 Acres TIME INTERVAL....:. 10. 00 min CN & 0 a 86.0 0 TC a 6 0 0.19 min ABSTRACTION COEFF: 0*20 TcReach - Sheet L: 34.00 ns:0.0110 p2yr: 1. 50 s: 0.0060 PEAK RATE: 0.03 cfs VOL: 0.01 Ac'-ft TIME: 480 -min e 0 • IMP 0.43 Acres 93wOO 62.77 min 0.07 Acres 90.40 5.00 min IMP 0.07 Acres 90000 5.00 min s 9/18/98 '1 : SvR Design Company page 3 NEW SEAVIEW ELEMENTARY New Basketball Court Swale modif ication basin: PLAY1 SvR No 98055 BAS IN SUMMARY BASIN ID: PLAY10 SBUH METHODOLOGY NAME: 10 YR COMBINED PLAY AREA TOTAL AREA... ....: 1. 25 Acres BASEFLOWS: 0. .00 cfs RAINFALL TYPE. 0 0 0 lei TYPE1A PERV IMP PRECIPITATION,...: 2. 00 inches AREA..: 0. 78 Acres 0. 47 Acres TIME INTERVAL....: 10, 00 min CN 6 0 10 86. 00 97000 TC 5. 00 min 5.00 min ABSTRACTION COEFF o. 0.20 TcReach - Sheet L: 34. 00 ns:0. 0110 p2yr: 1.50 s:0. 0060 PEAK RATE: 0.32 cfs, VOL: 0.12 Ac-ft TIME: 480 min BASIN ID: PLAY100 NAME: 100 YR COMBINED PLAY AREA SBUH METHODOLOGY TOTAL AREA.......: 1.25 Acres BASEFLOWS: 0*00 cfs RAINFALL TYPE....: TYPE1A PERV IMP PRECIPITATION....: 3.00 inches AREA..: 0. 78 Acres 0.47 Acres TIME INTERVAL....: 10.00 min CN a a 86*00 97-000 0 * TC 0 a a 0 5.00 min 5.00 min ABSTRACTION COEFF: 0.20 TcReach - Sheet L: 34.00 ns:0.0110 p2yr: 1.50 s:0.0060 PEAK .RATE: 0.57 cfs VOL: 0.21 Ac-ft TIME: 480 min BASIN ID: SWWRF10 NAME: 10 YR RUNOFF SW OF WBLDG SBUH METHODOLOGY TOTAL AREA.......: 0. 15 Acres BASEFLOWS: D. 00 cfs RAINFALL TYPE....: TYPE1A PERV IMP PRECIPITATION....: 2. 00 inches AREA.:: 0.00 Acres 0.15 Acres-, TIME INTERVAL....: 10.00 min CNO 86.00 90,00 TC 0.19 min 5. 00 min ABSTRACTION COEFF e. 0.20 TcReach - Sheet L: 34.00 ns:0.0110 p2yr: 1.50 s:0. 0060 PEAK RATE: 0.04 cfs VOL: 0.01 Ac-ft TIME: 480 min BASIN ID: SWWRF100 NAME: 10 0 YR RUNOFF SW OF WBLDG SBUH METHODOLOGY TOTAL AREA..,....: 0. 15 Acres BASEFLOWS: 0. 00 cfs RAINFALL TYPE....: TYPE1A PERV IMP PRECIPITATION....: 3.00 inches AREA..: 0.e 00 Acres 0. 15 Acres TIME INTERVAL....: 10, 00 min CN 0 86.00 90600 TC 9 0. 19 min 5. 00 min ABSTRACTION COEFF 0.20 TcReach - Sheet L: 34. 00 ns:0. 0110 p2yr: 1.50 s: 0.0060 PEAK RATE: 0.a7 cfs VOL: 0.02 Ac-ft TIME: 480 min • r7 E a 9/18/98 58:44 pm SvR Design Company page 4 NEW SEAVIEW ELEMENTARY New Basketball Court sw l e modification+ Basin: PLAY1 Sv-R No. 98055 #r !� �f ii� eu•rf !W �� !� iii i �M �f �f W� �f �f �4 �� !� �! �i � !� �f �� ••�� r �K � 7!! !� ire i� �� f �� 4 � �f �� !rE i #f �! !! i i� �� irri �f �f #�F #rr•rr �r �M �r �4 �f �i � #•!* �� HYDROGRAPH SUMMARY �r �� ! i i�i� �!F �r !1� �f !E �� i i iii r�r �! �! !�! �f �E i1••M1� � �r �L �i �Y� �4 �� TT� �! �E �� i � � � � � � � � � � � � � � � �� i W � � � � W* �! i �� f + PEAK TIME VOLUME HYD RUNOFF OF OF Contrib NUM RATE PEAK HYDRO Area • cfs min. cf \AcFt Acres Jr EX to-vR 1 0l651�480 16105 cf 4 59 L:sx 00%"yk 2 1.310 480 30132 cf 4. 59 P Ro R 0-W y 9 3 0 . 675 480 16605 cf 4 . 59 rioP. j Q0-*Y9 4 Yl ,3_3_9.�480 30754 cf 4. 59 61.iaYRRB11 0.639 `'}, 490 16105 cf 4,,59 C8-x,tpa,yk g vzZ 2 .291� 490 30132 cf 4.59 tor. io- YRREt13 0.652�°�'; 490 16605 cf 4.59 tao?'(60mYx 96U4 1.227,,E% 500 30754 cf 4.59mulw 4 a 0 C f d ,A- r • 9/18/98 58:44 pm SvR Design Company page 4 NEW SEAVIEW ELEMENTARY New Basketball Court sw l e modification+ Basin: PLAY1 Sv-R No. 98055 #r !� �f ii� eu•rf !W �� !� iii i �M �f �f W� �f �f �4 �� !� �! �i � !� �f �� ••�� r �K � 7!! !� ire i� �� f �� 4 � �f �� !rE i #f �! !! i i� �� irri �f �f #�F #rr•rr �r �M �r �4 �f �i � #•!* �� HYDROGRAPH SUMMARY �r �� ! i i�i� �!F �r !1� �f !E �� i i iii r�r �! �! !�! �f �E i1••M1� � �r �L �i �Y� �4 �� TT� �! �E �� i � � � � � � � � � � � � � � � �� i W � � � � W* �! i �� f + PEAK TIME VOLUME HYD RUNOFF OF OF Contrib NUM RATE PEAK HYDRO Area • cfs min. cf \AcFt Acres Jr EX to-vR 1 0l651�480 16105 cf 4 59 L:sx 00%"yk 2 1.310 480 30132 cf 4. 59 P Ro R 0-W y 9 3 0 . 675 480 16605 cf 4 . 59 rioP. j Q0-*Y9 4 Yl ,3_3_9.�480 30754 cf 4. 59 61.iaYRRB11 0.639 `'}, 490 16105 cf 4,,59 C8-x,tpa,yk g vzZ 2 .291� 490 30132 cf 4.59 tor. io- YRREt13 0.652�°�'; 490 16605 cf 4.59 tao?'(60mYx 96U4 1.227,,E% 500 30754 cf 4.59mulw 4 a 0 C f d ,A- r • a 9/18/98 1:58:44 pm SvR Design Company NEW SEAVIEW ELEMENTARY New Basketball Court swale modification page 5 Basin: PLAY1 SvR No. 98055 i� FYI �! � � iif rY �� i .....,, ,....,� !!� � �� ..._ .,.� i � �r i.r.. !F �� .� �! � � � 7iE � � ._ �� _.,,. �!!� i .... �� ._.i. .�.. �� i+...� ,_..� �� .�..� �.._.. �.+. ii* � #� �� i �� i• �� 0 �0 � �� i = = i fE = �� !E = �4 = = i ii= �+ i!t = i = = = = i = = = = = = = = = i = = = = = = = = = = = = = = = = = Yi i = = • TRAPEZOIDAL BASIN Description: 210 LF, Length: 210 0 00 ft. Side Slope 1: 5 Side Slope 2: 5 Infiltration Rate: STAGE STORAGE TABLE i ID No. DRNGFEAT 2' AT BOT * 5H: 1V SIDES Width: 2.00 ft. Side Slope 3: 5 Side Slope 4: 5 0.00 min/inch J TA ----STORAGE----> SWAGE ----S ORAGE- -- SWAGE ---- T0RAG .._-- STAGE < -- - R ,._i- � � �i 4F Fri �! �F �W �k rM rFr � �f Ty � � � FW i i� ! i! ! ! �4 � � i� ! ! rf i � �w r ! �f ! � ! � � �i i•W i• 39 . Y 0.0000 0.0000397.40 0.0809 399.00 11 0.3051 400.60 301251 395.90 524633 0.0012 31907.50 3941 1 i # 10 14127 ■? i �/j f i 31430 i 1 396.00 126.67 0,0029 397.60 4385 0.1007 399.20 14992 0.3442 400.80 32767 0.7522 396 . 10 222.30 0.0051 '7.7 0 4853 0.111415884 0.3647 0 1 V o 7 3 396.20 339.73 0.0078 397.80 5347 0.1227 399.40 16805 0.38581. • 3 Os8157 396.30 479. 17 0.0110 37 • 0 585 134 6 399.SO 1774 0.4076 401.10 1J 9 8 396.40 4, 8 0.0147 398 . 00 6409 0.1471 399.60 171 0.4300 401.20 38426 0.8B21 396.50 824.B3 0.0189 398.10 6979 0.1602 .7 19 738 0.4S31 41.1 i V 39921 0.9165 396.60 1031 0.0237 398'. 20 7574 0.1739 399.80 20773 0.4769 401.40 1 47 0.9515 396,70 1261 0.0289 398.30 8196 0.1882 399. 91 21838 13 401.5 43%007 0.9873 39 . 8 1513 0.0347 398.40 8843 0.2030 400.CO 22932 0.5264 401.60 44598 Is 0238 396.90 1789 0.0411 398.50 9518 0.2185 400.10 24056 0.5522 401.70 4 223 1.0611 397.00 288 0.0479 398.60 18218 0.2346 i . 25209 0.5787 401.80 47880 1.0992 397.10 2411 . 553 398.70 10946 0.2513 400.30 2 393 0.6059 401.90 4 571 1.1380 397.20 i.f! '7 0.0633 398#80 11700 0.2686 400.40 27606 0.6337402.00 - 51295 1s177 397.30 3128 0.0716 398.90 12482 0.2865 4 V 0 i 50 28850 0.6623 • • • 0 d i ! 1 G ! 9/18/98 1:589.44 pm SvR Design Company p NEW SEAVIEW ELEMENTARY New Basketball Court Swale modif ication 6 13asi.n: AY1 SvR No,, 98055 i STAGE DISCHARGE TABLE . DISCHARGE LIST Description: 12" ID No. 12"PIPE PIPE OUTLET @ 20 SLOPE 'I STAGE - - D I KAR- - - TA - - D I ERG -- - - TAG if - - �jor ..6C HAF. %;- - i TAG -- - D I AR - 5 t — f — — — ( f t ) r _ _ c _ _ ( t f ti! i �F f iF Mi Y i Y V ! — ri r! i ��'� �� F � i � i � Tf +/4t i! !T! � � w w' w w w w !' � �� i � i � � �! rF w w � w w w w � E �� a i i w � � � � i � � � � � i i i � i � i�l� !� w •! it = 395.80 0.0000 ��a�11 9 i 90.2700 # aL��} • {f�j -00 :� . i� ■V396.25 i .M"T 3 # J r 7 C • • 0 F 3 # i F r 9/18/98 1:58:44 pm SvR Design Company NEW SEAVIEW ELEMENTARY page New Basketball Court Swale modification Basin PLAY1 SvR.No. 98055 �r4 4rr �r �f �� i �� !� !�! �M #ram i�F ice! r� iiF� �f �F #�� ► �t � �� i� ilrr i�r wry � �� i� 1�!! ii� ii! �! �! �F 7�� iiif i�YiYi � #1� i iif � �i �i �ii �ih� iYYi iif Yi �!! �F �� 7�F !!�� Fes+ �! �f �� STAGE DISCHARGE TABLE MULTIPLE ORIFICE Description: Orifice Outlet Elev: 395s80 Elev: 394.s80 ft ID No. ORIF Control orifice Diameter: 8.5000 in. STAG - - I CMG - - TAG -- - I HAR- - - , STAGE <--DISCHLARGE--->'T ► - - D I % . HARG - - - - - 1.r - - r # r it 4..r ) - - - CfS - r r r - - it r r ) r rr r - wl� 4W rr M a m. M. ( - - 395.80 0 39 . 0 1.5187 397-00 2.1478 397.60 2.6305 3 .90 0.6200 396.50 1.6404 397.10 2.2355 397o7O 2,7026 396.00 . # 396.60 1.7537 397.20 2.31997•2.7728 396.10 .073J 396.70 1.8600 397.30 s 1 397.90 1 396.20 1.2400 396.80 1.9606 397.40 s 398i 0 2.9081 396.30 1.3864 i ■ 396.902.0563 397■ 0 NolFb. ?e, eQ,.assuA,.¢.S �re¢j`�jC. S'�b.Qd.-C�.iSthO 0 39(Vv 10. r Gond�tii o n S m)�e e o\; 4 elevA I v ki & � I Mf D 1% . 71% are, re , Iz" Ft PC 7 7 4d 9/18/98 1: 4-5- pm SvR Design Company NEW SEAVIEW L M N ARY New Basketball Court Swale modification Basin: PLAY1 SvR No. LEVEL POOL TABLE SUMMARY .MATCH INFLOW -S -- -- I - <-P.-.'AK-> OUTFLOW STORAGE ---___��-DESCRIPTION -------#- ( f ) ) --i - --i - - I ] ( VOL ( ) 10 YEAR EXISTING i i ■ ■ i * i i • • i ♦ i 0.65 0.65 RN G F EA lit 11 P ■ V ,+. AJ • 4 F n V 1 YEAR EXISTING .#�#■■i#■... 1.31 �1 F'. D N AT 1 1' I E .1 1 1. i%0 10 YEAR PROPOSED 0.65 D.67DRNGF AT ORIF 395.91 13 0.65 6 1i74 V 100 YEAR PROPOSES ....i■,.i■i■ 1.31 1.34 DRNGFEAT ORIF 396-19 14 1.23 330.37 cf s r t 11 [no] 7 Now: As .�o�d on OR �F s-t(�scl�argst i�ble P��c,e.dr�g , �Gl�a..p�' Pno�ra.�. assU•Its a �Fme o��-lc� Coond�iio a� ou�l�bl- ae.A4o.I . Y pz0.� 11SLr ; Red ; � �1�2 (tee,! �ool sum, �,-,ar'"( move P�oPose� co',d'i�io.• are... ;naccv�.. i�2 LPaa�c s{�a.� �d�t��eG� �s fir[. awcovwJ' o� 1^a" a6ovp. `�Q ovi-`Q� Wdt!(� 2,�WA.t�On �av��,P.'�- QiBfJ, p�c.r Pn� : ii¢ o c«,!c vlc�c. ahlic�2�vred % ac�n�a 4t44 ��urs e, td5� dao ufl�, �.J s or�'d[c¢. P.Q2u�.�o� . , 10 - YR. P�OPOS€1� P�1� S7�9C�r = 'L 3Y(,63 + �395.9t-395.8� = 396.14 i0Qv4h%JA ?A0PdSED FGAV.. SrAGF = ^- 39�.12 +�39G.19 -39Sa� = 35GI,91 a