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HomeMy WebLinkAboutCT 75-09B; Lot 44 of Map 9958; Hydrology Study; 1988-12-17_- ENGINEERING DEPT. LIBRARY City of Carlsbad 2075 Las Palmas Drive Carlsbad, CA 92009-4859 4 a" C' HELMING ENGINEERING, INC. Civil Engineers & land Planners OCEANSIDE, CALIFORNIA 92054 1919 Apple Street, Suite N (619) 967-4300 SHEET NO. CALCULATEDBY “zKTE 12-/7-h9f CHECKED BY DATE SCALE- ............. ...... ....... ... ........... , .. .................. ....... ........ .... .................. ........................... ..................................... HELMING ENGINEERING, INC. Civil Engineers lt Land Planners OCEANSIDE, CALIFORNIA 92054 1919 Apple Street, Suite N (619) 967-4300 JOB SHEET NO. CALCULATED * BY OF DATE 13- 17-8y CHECKED BY DATE SCALE ......... .... .. CT 727-9 .......................... .,... ....... ~;. ...... .................................................... ......... VD/y/gr ‘i ‘L ”.”‘.-!^. ..- . 6t? 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CALCULATEDBY \l-l7-PY CHECKED BY DATE SCALE ,. ,.'.' ......... ,. .... : ........ 1 ........ j ..... ...,... . ... .......... .. ............. .. ... . ........... .. ........... ~ sm!. .. .. .+.+6..5-. : .. .. s..m. S7-A .R, t.70.. .... - R*!PJ ..... ; .Qlao.(chr - 8:&13 - . QI.,'(&) -. ........ ..4~~3 .. ~Q~oJ. - It{>.). /I;/' .~. , ................... .... ..... ........................... .. . .......................... ... .... .... :4 ............................. 2 1.08 - .. c ,/! 91 .... n .. 3.94 ......... .. ................................ .. .... .... .. . , ..... ..... .A + ............................. ........ .....,.... pB.c . (a. '& ~ %. . y /c I L .A"--- ~~ -I ........................... ....... c3 " ........... .., 4 471 -/3 ................ ,... ........ .. ........... fb,4 , /3E-:b7=. e M/D/J&G I ' ' " "' "" .. ... .. ................................. ' A- = O.D'I, .. ) ....................... 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". ... .. .. ...... ..................... .... .............................................................. .................. .. a,, LfSE 12 "X, 0 4" 13 1;1A 1.d P6-S T.-dJ?'-.K .. ... ............. .. ........... ...................... ....... .. .... ............................. ....................... , .......................... .................................... ...... > ............... .. .. ....... HELMING ENGINEERING, INC. Civil Engineers & Land Planners OCEANSIDE, CALIFORNIA 92054 1919 Apple Street, Suite N (619) 967-4300 SHEET NO. CALCULATEDSY Il-Il-fY. - CHECKED 8V DATE SCALE , ................................... ........ ...... .. ......... ..... .... .. . ...... ~ .. ........... COUJC ..... D,,~A,//,J~~E 'SLJA~~' AC,QO.?.> ../5.,8 .7m1749 ....... ................. ........... L//J& - .................... 1'6 . ~ ... sn. .. - ... ............. 'nod 1. [4IOd .r "1. ....... ............ 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I ..... .. . .. :.. ... .. ,. . . ... .. .. ..... . .. . .. . . . . . . . . . .. . ... .. .. . . . HELMING ENGINEERING, INC. Civil Engineers & Land Planners OCEANSIDE, CALIFORNIA 92054 1919 Apple Street, Suite N (619) 967-4300 JOB 7 SHEET NO. CALCULATEDBY -"P- I3 - L1- fY CHECKED BY DATE ...................................................... ........................................................ ...... .,. .............................. ,. ............... .......... .... ...... /<!N.G s. . 4 O.Ao.o< rad& 7-14 c3.T - d ,,3 I ..j, .......... .I ... ..~. ..... ...... ... ............................... ........ ... ............. ... 4, =, , 8.0 I L&/+'' 3/A-';/ ; ~d = Z# . 5: )/"TI" hj,.c I .............................. . .I . . I .. ... .... ., . " .................. ..... ...... .................................... .............. j ASSM". ..... zl hkQ& I = 4J' "+A. ) ....... => Q'' = o,,@ ..... .............. ..,.. ..... ..;. .Dd . ~ ., ............................ ................ SYZ) ...I .-... ...... 5.011- Qkfi.) .................... .. " - .. L__ ............... .;. ..................... ,... ...... ,.. .... ................................................ I ......... I 1. ..o... ............. bl'f ......... 3 9b.85 . 01 156! ZL. 48 ........... JOE 1280 HELMING ENGINEERING, INC. civil Engineers & Land Planners OCEANSIDE, CALIFORNIA 92054 (619) 967-4300 SHEET NO. Q&- OF 1919 Apple Street, Suite N CALCULATED BY DATE 13 - 17-%'v - CHECKED BY SCALE k\yDQAU.L.\CS DATE I ..... CWAC I TY 4+ /3,qoo~, ~/tc/-i , ,, ,,,, D , - 73- ...... TPC . .'>3.. 'I ... ... -. ... ... .. ..... ... .... .... ..... .... ..... ... .... ..... ... .... .... -I HELMING ENGINEERING, INC. Clvli Engineers & Land Planners OCEANSIDE, CALIFORNIA 92054 1919 Apple Street, Suite N (619) 967-4300 JOB IZ80 SHEET NO. OF CALCULATED BY DATE 13-17-8r CHECKED BY DATE - Date Job No. Page NO. I/ ".".I.. - - ... __ - ...... ... 4YS7iLH - ............. T . ......... ". . _ . .... - .... .- /MET " Job No. a .I . ..... Page NO. L ". . _. ,. .- ". . - - - ." - - ........ .- ................. . -. .... - -~ ." . .. .... . ...... " ............ - ....... .... -. - " ". __ ... ~ .. ". ..... -. .. .... ........ _.. - ._ - ..... .............. ... -. .. ." ..... ._ .. ... - Date Job No. 6935 Page No. /3 .... .. - -. . " ...... I - __ .... ..... ..... L2i"H E =#fl ._ L ...... ~ ... /NL ET - ........................ - " ". ". " - -. - .... .. ...................... ". - .. - " - " . ." ..... .- " ... " ............... -. .- ." . - - .............. , ..... ................... - .- -. - . - ...... RUKOFF COEFFICIENTS (RATIONAL METHOD) Undeveloped Residential: Rural Single Family Multi-Units Mobile Homes (2) Commercial (2) 80% Impervious Industrial (2) 90% Impervious NOTES : - . Soil Group (1) Coefficient, C - A .3U .so .40 .45 .45 .70 .BO - B .35 .35 .45 .50 .so . 75 .a5 C .40 ._ .40 .50 .60 .55 .BO . ‘30 (1) Obtain soil group from maps on file with the Department of Sanita?:.o:l and Flood Control. (2) Where actual conditions deviate significantly from the tabulated C, may be revised by multiplying 80% or 90% by the ratio of actual imperviousness values of 80% or 90%, the values given for coefficiezt , imperviousness to the tabulated imperviousness. However, in no case shrrll the final coefficient be less than 0.50. For example: Cor?s:Jor commercial property on D soil group. Actual imperviousness = 50% Tabulated imperviousness = SO% Revised C = X 0.85 = 0.53 m t 40 I" *00# SAN DIEGO COUNTY NOMOGRRH FOR DETERMINATTION DEPARTMENT OF SPECIAL DISTRICT SERVICES OF TIMEWTONCENTRATION (TC) FOR NATURAL WATERSHEDS DESIGN MANUAL @PROVED #j, /d ,/&+A e-- APPENDIX X--A~ u 0 e .oar a ?ku L WUIV . C AW ea a w WC, v C %I" LCC n N .m cv I"- Li G.- n rn U In 6-Hour Precipitation (inches) otnotnom 0 In 0 v) 0 ... rn m I . '- 0 z I -