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1991-2833 G 6/~5 Category d t<3:3 Name q Plan ck. # recdescv Street Address I 3,~ 1 C;¿( Serial # I Description Year ,. . ~~ SOWARDS AND BROWN ENGiNEERING 2187 Newcastle Ave., Suite 202 CARDIFF BY THE SEA, CALIFORNIA 92007 JOB IHEET NO.---1 CALCULATED BV (2....s OF DATE if ('l,tlq { CHECKED BV DATE ICALE .~ì~==~~t~~Bü1l . Iii I ! I Ii' I ! ¡ ! . i I I I 1 ¡ i j I i I ': ¡, ¡ I ¡ i ¡",~~"¡//' $'..IIJ,<"k^.'l'll ¡'I' ............,........ .......................... ........,... ....;.............t..........f.......... ......t.. .....................' I , ., """"r"""""r"""""'r""""'l"" """'i,""""""'!""""'!"""""" ....... j f..... ..¡...........: .............,.......1....... ........j............. ¡'+""""'i"""""""f"""dEPl"'Gf....f?~BLf' . 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(2)Where actual conditions deviate significantly from the tabulated impervious- ness values of 80% or 90%, the values given for coefficient C, may be revised by multiplying 80% or 90% by the ratio of actual imperviou~ness to the tabulated imperviousness. However, in no case shall the final coefficient be less than 0.50. For example: Consider commercial property on D soi I. Actual imperviousness a 50% Tabulated imperviousness a 800" Revised C = 50 x 0.85 = 0.53 80 '. "~ ., IX-A Deleted APPENDIX IX-B ELEV. FACTOR 0-/500 lOO 1500-3000 1.25 3000-4000 /.42 4000-5000 1.60 5000-6000 1.10 DESERT /..25 To obtain correct inttnsity, multiply intensi1y on chart by. factor for design eleva1ion. - Z ~ 0 '" Z 0 en c - z ~ ~ 0 ~ ~--C I ::u O~::U 0 J> - ,., < C Z PI ::u ì: (b U) þ þ :j r- z 0 r- » 2 z -U PI I -U G) ." 111 0 ::u Z PI 0 £) - C X '" ~ z n ~ M INUTESDURATrON 20 30 40 5 0 .----+--- '----+h'~ ,r-.1I":~ HOURS 2 3 ... - HID: ~I~ - 0 ffi c Za:: «::> (1)0 -J: -+- T -';'4- i' .- :-.1:-+ 2_0 . >0:: t-UJ -Q. 1.0 (I) 0.9 ~ U) 0.8 t- ~ O. 7 ~~0.6 0.5 0.4 _HH+ - FfW --'-':~ ~ 0.3 f-- -- -f V1HH i 11nr t ~~ tt - t-~u - t -- ------..I- - , 2 0.2 e'" 5 ~ 20 30 40 50 MINUTES DURATION I¡UHH~II:: 4 5 6 7 8 9 10 - ¡ .. ~...- ., III-- J' . + f' .. I 3 4 HOURS No.. ~ :~f=Ej - -~~ -- -- ~I t--F- ~ ¡ i11Iti£ 6 7 8 9 1O 5 ..1 '- §&~ [90§@@ C-.-- 1 ....... IlVO(~> 1)M'N46~ - . . . 'P? A-'5. I .,)