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HomeMy WebLinkAboutCT 81-10; Crivello Corporate Center; Drainage Study; 1990-11-16‘~ KAHR AND ASSOCIATES CKL\QSLL3 c, JkM & (z&E ccx3JT-e p 5500 AVENIDA ENCINAS ‘L-T II cizc, '1-7j40/30 :‘j/bj70 SUITE 133 FE 2,=!3,‘-1”,~ wJ& 317-T CAALSBAD, CA 92008 ?A&& IJw-l~EQ I I I z z 3 4 5 6. 1 OF S.n-E. ,.,, .i_.:I .-.-. I I-_,, ~.-,_.~ q!y*<:~“~ ‘-‘x-t? 1 KAHFt AND ASSOCIATES Cl2~Jc3An cow-v&n@ C&k M#)o AVENIDA ENCINAS Lu-r 11 cfvu4am T2c3sAU CTL ~$@k~, SUITE 133 ~RISBAD. CA 92008 127 t~ojoo s/2.6/90 FF ST3 OY % LOT- It , CT Sl-IO MAP NO. 10330 I&h) USE ~~DUST&IAL LAFJD U&E E ~FCotic&~7iz~/o~ /D~rz,qjon/ (0) .+s;::,:, ;.+ :..i+.. .” ii ~~ : ..i,. .~ . *;,p,,, : ;;:i.;. <’ -~~ ; .: .,^ :., ~: ., 5 D~ryffi &&5IN G/2&4 ‘0 il j.-’ II’ The Qfulitd,Q&~ BA-s/~V /wLe/+s , 1.u hCLLG5 ) k&5 /0v/a/c47&m _- ~~ II: on/ 74e ‘NUKED IauiNA~~ RSA- /WV? 3. I -c l’M w,; ~,( .,,,, ,,,/pe ,:, i -nr. ‘i ;, 7T.K I. KAHR AND ASSOCIATES -- ‘., 5600 AVENIDA ENCINAS .,, SUITE 133 i mc :~ CARLSBAD. CA 92008 ..,: . ,., - LR\~)sLLo COQ~G& &hK.R Lcrr \\, 04n.Ls3AB CSSEJS,;, LT’A. I21 190,cn S/26/=10 FT- 9 . ,,,= c3;,0 -4 -~’ J qyy- : -~’ :i ~“- ?.$y;, e,,i- ,, .*~.‘,$ ..\,‘,‘, ,’ 72 ,?,..“mL_~ .~... ,,; ;w WV_ ..r__ _ ..L, ..- ,_~,’ A&g+% ‘.;:.~,. ,: : ~:‘+ ~~~~.,;k~~,~~‘:~kT ..,.~.,’ Ii : ~. ;-, 1 &$L++& 1. ._. ,.__“~ ,,~ _ ,, - ,.. KAHR AND ASSOCIATES SSOO AVENIDA ENCINAS S.UITE 133 to~ll, cTq(-IO’, MAi’lS33@ c (z. lUGLl0 C~k(Cwz a-Q PE 2.90!~5 CAALSBAD. CA 92008 -ymE Of CCtiC&tJT~Tlclh9 CALL5 t)sE “Wri3A~ *wLt 5 OJtR&AuD ilMti5 OF F;LOIE.I c~nu& 5” FROM CLW OF 5-D. “bsh,%~k& D~$~JJ HWIL 1 yw en, -.- TV _~.’ s= “‘&,= -9% :a ‘&=I5 M,IAIuT~S ~<,,f% ‘~ ,;. $-&z -& ,: %:~I#. - itI= Lv3K. :a:- ..++;mf~yz.b~=5,3~ -; 5 = 5*?&= l,3-/= 0’; &= /o filJae$ .,L-- Cii.5 I,~, M.zkl R= I& 4c &g+307,% 7?vlzq7 (&’ $= g=/&$= I,2 % .b c,= II b-liUU~< .. .L-, 5zs’ i -1 .I ii -1’ j j I -i 4 f -. -; ! -. L&W USE ‘RUSOFF COEFFICIENTS (RATIOSAL XETHOD) Undevelupe-1 Residential: Rura 1 Coefficient, C Soil Group t:l) B c 0 G .- .35 .4O , ‘j A .3C . 32 .jj .4c .-5 .4j .5C ..5j .50 .60 .-,’ .SG .S5 c- -J .75 .S? -23 Sir.gle Family .40 Multi-Units .4S ?lobile Homes -(;1) .Jj Commercial (2) . ic Indktrial (2)) L. 905 Impervious Commercial (2) (dY$Ys; e ..-:I: e .BC :_ .SI .9c (3 8.- XOTES : (1) Obtain soil group from maps on file with the @e?artmezt cf Sanitar-.::I and Flood Control. (2) Where actual conditions deviate significantly frcm the tabuIs.ted iqerviousness values of 30% or 90%, the values given for coefficierr C, may be revised by multiplying 604 or 935 by the ratio cf asf.zi inperviousness to the tabulated imperviousness. Eo:;e:er, in no c252 ' shall the f;nal coefficient be less than O.SB. For esamr.r!:e: c, q<. c3,....15I commercial property on D soil group. Actual imperviousness = jOTa Tabulated impervicusness = SO”, Revised C = So I O.SS = 0.5.3 TJ pi.. 1, .=12 i;pp ,;;;3 .A,:,:,;;;Ay:j de;! 1.,!2nc~%?71a:A-.,E, &it0 ; 37 ^,.,.,G.>.> C. ““,m.j _.._....._-. L.n u;i- ,‘.L‘:,firz,Li; /: : , I ' TNTE~tSIT&JRjITlOk~ GESI& CHART I 1 I 1 I I 1 I)TmflibnfC I .I I ‘II. ).~l:*.L Equation: I = 7.44 P6 D 1 = '6 a 6 Hr. Precipitation (In.) ;ilj,,-!.D = Du+ion (Min.) Dirhctions for Application: 1) 2) 3) 4) 5) From precipitati.on maps determine 6 hr. and 24 hr. amounts for the selected frequenc:l. These maps are printed in the County Hydrology Manual (10, 59.and 100 yr. maps included in tt Design and Procedure tlanual).- Adjust 6 hr. precipitation (if necessary) so that it is within the range of 45% to 652 of the 24 hr. precipitation. (Rot aprlicable to Desert) Plot 6 hr. precipitation on the right side of the chart. Draw a line through the point parallel to the plotted lines. This line is the intensity-duration curve for the location being analyzed. Application Form: 0) Selected Frequency 100 yr. 1) P6 -5: in., P24’ 6& s h= s%* 2) Adjusted *P6= 9.8 '24 in. 3) t,= min. 4) I= in/hr.~ *Not Applicable to Desert Region 10 15 20 30 40 50 1 2 3 4 56 1 I I I C~ TY ( ~‘YIN _ oh0 1 1 1 DEPARTMENT OF SANITATION t FLOOD COtlTROL 33’ 45’ l x Ldl I’ 30’ 1 3i.F SAN Cl 15' i in '- - .' I 45’ 1 _ Prepn Aby V,Y&~? !I’ !. \ y2 I I ;01 1’5’ I 118’ 45’ 117' '15' 30' 1;1 ilb" 0 '~I(- v ., ; ~, ,, 1 nppf:f!t~i ‘.r 1: I I 1 I COUNTY OF SAN DIE& I I DEPARTMENT OF SANITATION 6, ilO-iEAR’ 24hOr)i~ PitClbisrAtlOfi ’ ’ ” FLOOII CONTROL 45 ’ 30’ 15’ 33’ 45’ I’RECIPITATIOH IFI )“EFilTIiS OF Al3 IPJCII _. . . ..- llr.si ,-1~.,1 1 I!:?~ i+!l’l’liHIIIY XI-II - -.. - - - - __ .- - -’ 700 --.-~‘~-*;-I: , _ __-. 609 500 wa MD 200 loo 0 m 60 Y, c EXAMPLE: c;i(VEM: i.-ENGTt-1 OF FLOW = 400 FT. 5LOPcz = I.0 46 COEF~ICIEr4T OF RJIcrCf F c = . ~70 X.EAi> : OVWLA+-ID FLOW’rlm~ = I5 ;L,ll,r.zlui:Ej 2~ F~<~Jw, cl~j~~.‘,‘,~~~~~“f?_=“= ;:.~;~,;1-~3~Au~*ir~ II I-P-i- \qJ,+ eL;rrl=h), 3 hl,;= A rFl3 -~, .- $zgj .: ,~i~ ~.. . . -, - - ‘. .~ - - JOB TITLE: zy5J p6 /s”~6~=j Pb 72-g 0 - STORM SEWER C 00 +,,, cza.43 D-0v6-y~5 TIME OF CONCENTRATION (UNIMPROVED) DES.BY Fi= CHK.BY DAT Design Flaw: v = tps. I a+.04 @ pJ _ .- @ 0, q0z.y 7o(#z!J US -. . ..i a-723 3&Z *48, ~_. .c;/ eFl+os’b r ,“-. z* I ‘\7-Tls.s6 Bz+. ?$j$$ ; .:~:Tg .+?&JJ .:_ --_--- -. -zL.,Z~~ :, . --__~ .-__ ( ; : ; ~:fSHT.~OF~ PVC:’ :, ..,. -? i . . . .:. _. :. i -_ 2’ F. / / ~-_ i’ ‘~~ P c?- u/lows ql-rc?s . ~SSU~,s.x 17 &. e/f %P *AL IA II? f&T 4-r al.9 a@ Se-e r,,,f=K cd.f%m7%, t&N r-c. / f-b21 /ic s-tq, \Q QF =a- 6e ~\2 cPwIP44~~~ 6, c-ALL/ &,fLl 4 c = D,BSe ~, h&k +-La AL,,. L.-J<,,, <-A Lk ,/L P,,,-7c/. +A. = 4% 8 ATrr5 of s&A A.4.1 j&w, &f%,fJ &, = 035 A = (o~J(25~(5/9~) ,' lltc3 A . _ @.85J~2.97)Wr9 AC) = 13LOcfG _‘a:: -~ ;--’ i.;, ,c_ ‘, : :.-A-... :~. .::, .A+.;< _ ;g-.+ ~. ,- :a,, ., Ikkr; I\ OP I2 .,., 4.i4-P .cc& w5-e * *2_5 I f-s /a. 5.7 ,O+- Y5 = 170-7 cf; +-n ff-f3/-0 c+s c9Lb4q e/c f& dr-fnedo 9rP9. I ,. .~ _, ,._ .~. Fwr~ IZOF 12 ::. ,&&Y+&,