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HomeMy WebLinkAboutHMP 15-01; MARTIN RESIDENCE; PRELIMINARY DRAINAGE STUDY; 2016-12-13RECORD COPY Initial Date RCEaV L. JAN O 5 2017 C CARLSBAD PLANNING DIVIsION I I I I I PRELIMINARY DRAINAGE STUDY FOR MARTIN RESIDENCE ADAMS STREET APN: 206-200-03 I I I I I I I I I I I I I I PREPARED B SOWARDS AND BROWN ENGINEERING, INC. CONSULTING ENGINEERS 2187 NEWCASTLE AVENUE, STE 103, CARDIFF, CA 92007 (760) 436-8500 13-036 12/13/16 U)C 14 .Vt1....P.L..&.i4 OJUit!7,.1- LJO6Y A-iA rA A J A A-' 17 4./v....11....1/ QLLJ ..c.....c..4 tó JOB SOWARDS AND BROWN ENGINEERING SHEET 2187 Newcastle Ave., Suite 202 CALCULATED BY CARDIFF BY THE SEA, CALIFORNIA 92007 CHECKED BY_ SCALE________ OF DATE DATE ROOuCr2O4-1 nc., Grnton, Mast 01471 oticr 204-1 /7 Inc.. Groton, Mii& 01471 I JOB SOWARDS AND BROWN ENGINEERING SH EET NO. 1+ OF 2187 Newcastle Ave., Suite 202 CALCULATED BY____________________ DA I CARDIFF BY THE SEA, CALIFORNIA 92007 CHECKED BY CA 000CT 204-I Inc. 004cc. Mccc. 01471 ,vpg4o; V L7 FLo Col J To YI4E LA 400,, .4 .i).2-.]....F.......O 4..7.A............ ............. (o ) 4...C 1..... (6 s)ôy t1'1 KI' e41 )A)j (kIJ •7O - IA/A "5 I SOWARDS AND BROWN ENGINEERING 2187 Newcastle Ave., Suite. 202 I CARDIFF BY THE SEA, CALIFORNIA 92007 I I I I I I I I I I I I I 1 I I I PR0JC1204-I i7 Inc.. Cn4on, Man 01471. JOB SHEET NO. OF_ CALCULATED BY DATE CHECKED BY_ DATE SCALE F 1A1Ps JOB O. SOWARDS AND BROWN ENGINEERING SHEET N 6 OF 2187 Newcastle Ave., Suite 202 CALCULATED BY____________________ DATE____________ CARDIFF BY THE SEA, CALIFORNIA 92007 CHECKED BY DATE SCALE O 7IIC J/'4,A4'F P /f L1,N(,ttf,A4 :0 F A. -re, Rl, Al" kA7't(2- J PLE4! a Inc. Gmton, 01471. I SOWARDS AND BROWN ENGINEERING 2187 Newcastle Ave., Suite 202 I CARDIFF BY THE SEA, CALIFORNIA 92007 I I I I I I I I I I I I I I I I I JOB SHEET NO. 7 OF CALCULATED BY________________________ DATE_____________________ CHECKED BY DATE SCALE - PRODUCT2O4.l lnc. Gmton, Mass 01411. i SOWARDS AND BROWN ENGINEERING I 2187 Newcastle Ave., Suite 202 CARDIFF BY THE SEA, CALIFORNIA 92007 SHEET NO. OF_ CALCULATED BY________________________ DATE CHECKED BY DATE SCALE . ..,....P..:.. VG'... ...P t............................................................................. ...... ............L?AJ/ C- .....A°.••.....................•....I......../............................................................9.... . ...............................................................................................................................................0 / ' C.............. 0, -1,716 Oc7 i o a 01 1 6,;q 01 Lf 6 - - - 7 S_7) 6' 9 a2r C) 29 PRODUCT204-I G,uton, M. 01471. SOWARDS AND BROWN ENGINEERING SHEET NO. OF_ 2187 Newcastle Ave., Suite 202 CALCULATED BY DATE CARDIFF BY THE SEA, CALIFORNIA 92007 CHECKED BY_ DATE SCALE PRODUCT 2041 Inc. Won, M,c 01471. - - - - - - - - - - - - - - - - - - - ? 1- cô• W'LY FLOWL/NE — — — — — — — — — — — — — — — — — — — r 25 IC - I x 26.33' 105.46' = .020 Mile E'LY FLOWLINE I SOWARDS AND BROWN ENGINEERING 2187 Newcastle Ave., Suite 202 I CARDIFF BY THE SEA, CALIFORNIA 92007 I I I I I I I I I I I I I I 1 I I SHEET NO. ) 2_ OF_ CALCULATED BY DATE CHECKED BY DATE SCA'E_ ..... ' /41 ................'.1 '.1 'i................ z(i.kj..:............ ..riJ...................................................................... ......................... ...............................................................'O7.....,i.J ................. P&f 5F/cc7 t (4 O,6t1FI -' 15 t'fvQ fc/ 5/F7 I?, q,, . 6 6 rJ 9 ........JE L 1% .......... ,' Jh'LE7 ( A )O.!i(F) z') PE J/F7 /, I oc cr ' PRODUCT 204.1 Gmton, U, 01471. I I I I 1 I I I I I Circular Channel Analysis & Design Solved with Manning 's Equation Open Channel - Uniform flow Worksheet Name: Comment: 6" PVC @ 1% Solve For Full Flow Capacity Given Input Data: Diameter ..........0.50 ft Slope .............0.0100 ft/ft Mannings n .......0.011 Discharge .........0.66 cfs Computed Results: Full Flow Capacity 0.66 cfs - Full Flow Depth ........0.50 ft Velocity..........3.38 fps Flow Area .........0.20 sf Critical Depth 0.41 ft Critical Slope.... 0.0099 ft/ft Percent Full ......100.00 % Full Capacity.....0.66 cfs QMAX ®.94D ........0.71 cfs Froude Number .....FULL I I I I I I Open Channel Flow Module, Version 3.21 (c) 1990 1 Haestad Methods, Inc. * 37 Brookside Rd * Waterbury, Ct 06708 I I I I I I I I I I I I I I I I I I I I I Circular Channel Analysis & Design Solved with Manning's Equation Open Channel - Uniform flow Worksheet Name: Comment: 6" PVC @ 2.5 Solve For Full Flow Capacity Given Input Data: Diameter ..........0.50 ft Slope .............0.0250 ft/ft Manning's n .......0.011 Discharge .........1.05 cfs Computed Results: Full Flow Capacity 1.05 cfs Full Flow Depth ........0.50 ft Velocity..........5.34 fps Flow Area .........0.20 sf Critical Depth 0.48 ft Critical Slope.... 0.0217 ft/ft Percent Full ......100.00 ' Full Capacity.....1.05 cfs QMAX @.94D ........1.13 cfs Froude Number .....FULL Open Channel Flow Module, Version 3.21 (c) 1990 Maestad Methods, Inc. * 37 Brookside Rd * Waterbury, Ct 06708 469200 469300 4694(3) 469500 469600 469700 469800 469900 33o 532 N Hydrologic Soil Group—San Diego County Area, California 8 5, 33 554 N 469200 469300 469400 469500 469600 469700 4698130 469900 S\ I GaF 470000 470100 \ ' t ' 4 470000 470100 339 5 54' N 33 S 32 N Map Scale: 1:4,740 f printed on A landscape (lix 8.5") sheet. Meters N 0 50 100 200 300 __________Feet F:' 0 200 400 800 1200 Map prnjection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 1 1 WGS84 Natural Resources Web Soil Survey Conservation Service National Cooperative Soil Survey 1/23/2014 Page 1 of 4 Hydrologic Soil Group—San Diego County Area, California MAP LEGEND MAP INFORMATION Area of Interest (AOl) C The soil surveys that comprise your AOl were mapped at 1:24,000. Area of Interest (AOl) 0 C/D Soils Warning: Soil Map may not be valid at this scale. Soil Rating Polygons 0 Enlargement of maps beyond the scale of mapping can cause A j Not rated or not available misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting AID Water Features soils that could have been shown at a more detailed scale. B Streams and Canals Transportation Please rely on the bar scale on each map sheet for map BID Rails measurements. C Interstate Highways Source of Map: Natural Resources Conservation Service C/D Web Soil Survey URL: http://websoilsurvey.nrcs.usda.gov US Routes Coordinate System: Web Mercator (EPSG:3857) 0 Major Roads Maps from the Web Soil Survey are based on the Web Mercator Not rated or not available Local Roads projection, which preserves direction and shape but distorts Soil Rating Lines distance and area. A projection that preserves area, such as the Background Albers equal-area conic projection, should be used if more accurate 0 A -. Aerial Photography calculations of distance or area are required. - - AID This product is generated from the USDA-NRCS certified data as of B the version date(s) listed below. ,o B/D Soil Survey Area: San Diego County Area, California Survey Area Data: Version 7, Nov 15, 2013 C Soil map units are labeled (as space allows) for map scales 1:50,000 CID or larger. - D Date(s) aerial images were photographed: May 3, 2010—Jun 19, Not rated or not available 2010 Soil Rating Points The orthophoto or other base map on which the soil lines were Q A compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting o A/D of map unit boundaries may be evident. O B/D l:SD,\ Natural Resources Web Soil Survey 1/23/2014 Conservation Service National Cooperative Soil Survey Page 2 of 4 Hydrologic Soil Group—San Diego County Area, California Hydrologic Soil Group Hydrologic Soil Group— Summary by Map Unit - San Diego County Area, California (CA638) Map unit symbol Map unit name Rating Acres in AOl Percent of AOl CbC Carlsbad gravelly loamy B 5.7 5.4% sand, 5 to 9 percent slopes CbD Carlsbad gravelly loamy B 7.4 7.0% sand, 9 to 15 percent slopes GaF Gaviota fine sandy loam, D 11.6 11.0% 30 to 50 percent slopes LfC Las Flores-Urban land 0 18.6 17.6% complex, 2 to 9 percent slopes LG-W Lagoon water 30.4 28.9% LvF3 Loamy alluvial land- D 4.3 4.1% Huerhuero complex, 9 to 50 percent slopes, severely eroded MIE Marina loamy coarse B 27.3 26.0% sand, 9 to 30 percent slopes Totals for Area of Interest 105.2 100.0% USDA Natural Resources Web Soil Survey 1/23/2014 Conservation Service National Cooperative Soil Survey Page 3 of 4 I Hydrologic Soil Group—San Diego County Area, California Description Hydrologic soil groups are based on estimates of runoff potential. Soils are assigned to one of four groups according to the rate of water infiltration when the soils are not protected by vegetation, are thoroughly wet, and receive precipitation from long-duration storms. The soils in the United States are assigned to four groups (A, B, C, and D) and three dual classes (A/D, BID, and CID). The groups are defined as follows: Group A. Soils having a high infiltration rate (low runoff potential) when thoroughly wet. These consist mainly of deep, well drained to excessively drained sands or gravelly sands. These soils have a high rate of water transmission. Group B. Soils having a moderate infiltration rate when thoroughly wet. These consist chiefly of moderately deep or deep, moderately well drained or well drained soils that have moderately fine texture to moderately coarse texture. These soils have a moderate rate of water transmission. Group C. Soils having a slow infiltration rate when thoroughly wet. These consist chiefly of soils having a layer that impedes the downward movement of water or soils of moderately fine texture or.fine texture. These soils have a slow rate of water transmission. Group D. Soils having a very slow infiltration rate (high runoff potential) when thoroughly wet. These consist chiefly of clays that have a high shrink-swell potential, soils that have a high water table, soils that have a claypan or clay layer at or near the surface, and soils that are shallow over nearly impervious material. These soils have a very slow rate of water transmission. If a soil is assigned to a dual hydrologic group (AID, B/D, or C/D), the first letter is for drained areas and the second is for undrained areas. Only the soils that in their natural condition are in group D are assigned to dual classes. Rating Options Aggregation Method: Dominant Condition Component Percent Cutoff. None Specified Tie-break Rule: Higher I I I USDA Natural Resources Conservation Service I Web Soil Survey National Cooperative Soil Survey 1/23/2014 Page 4 of 4 I 1 I I I I 1 17 I I I I I - - - - - - - - - - - - - - - - - - - San Diego County Hydrology Manual Section: 3 Date: June 2003 Page: 6of26 Table 3-1 RUNOFF COEFFICIENTS FOR URBAN AREAS Land Use Runoff Coefficient "C" Soil Type NRCS Elements County Elements % IMPER. A B C D Undisturbed Natural Terrain (Natural) Permanent Open Space 0* 0.20 0.25 0.30 0.35 Low Density Residential (LDR) Residential, 1.0 DU/A or less 10 0.27 0.32 0.36 0.41 Low Density Residential (LDR) Residential, 2.0 DU/A or less 20 0.34 0.38 0.42 0.46 Low Density Residential (LDR) Residential, 2.9 DU/A or less 25 0.38 0.41 0.45 0.49 Medium Density Residential (MDR) Residential, 4.3 DU/A or less 30 0.41 0.45 0.48 0.52 Medium Density Residential (MDR) Residential, 7.3 DU/A or less 40 0.48 0.51 0.54 0.57 Medium Density Residential (MDR) Residential, 10.9 DU/A or less 45 0.52 0.54 0.57 0.60 Medium Density Residential (MDR) Residential, 14.5 DU/A or less 50 0.55 0.58 0.60 0.63 High Density Residential (HDR) Residential, 24.0 DU/A or less 65 0.66 0.67 0.69 0.71 High Density Residential (HDR) Residential, 43.0 DU/A or less 80 0.76 0.77 0.78 0.79 Commercial/Industrial (N. Corn) Neighborhood Commercial 80 0.76 0.77 0.78 0.79 Commercial/Industrial (U. Corn) General Commercial 85 0.80 0.80 0.81 0.82 Commercial/Industrial (O.P. Corn) Office Professional/Commercial 90 0.83 0.84 0.84 0.85 Commercial/Industrial (Limited I.) Limited Industrial 90 0.83 0.84 0.84 0.85 Commercial/Industrial (General I.) General Industrial 95 0.87 0.87 0.87 0.87 *The values associated with 0% impervious may be used for direct calculation of the runoff coefficient as described in Section 3.1.2 (representing the pervious runoff coefficient, Cp, for the soil type), or for areas that will remain undisturbed in perpetuity. Justification must be given that the area will remain natural forever (e.g., the area is located in Cleveland National Forest). DU/A = dwelling units per acre NRCS = National Resources Conservation Service 3-6 b - - County of San Diego 3330 Hydrology Manual ._.p .. . -...-.. ., N__:... .... ... ... .... .. ,., 0 Rainfall isopluvials / 3315------ / 100 Year Rainfall Event 6 Hours OCEANSIDE N. - .: ---. -- - - ... -.- -sopluvial (inches) ~sc 100 CARLSBAD / ........... QJ ENCINfAS SOLAI4 BEACH PO V COLJN 33'00' EL MAR .) ••.,...--.. . ........... ..,. NTEE AND CAj I I J 32'45' -- -_ A 3 J 3245 - IMPERIAL BEACH ....... 3230' 3230' 3 0 3Miles b En o rn County of San Diego ____ ____ Hydrology Manual 3330 : IQ Rainfall Is opluvials 33 15------------- 40 3315 100 Year Rainfall Event -24 Hours o . OCEANSIDE vi / ...'•__•/_•.. .• sopluvial (inches) SID CARLSBAD\ d? '( , 7.Pj -41 .. ... .. ..\ . ,.. ..... Ic Th ., ENCINITAS C 0 a 3300- _______ 3300 _____________ SOLNN BEACH ...• . .. . ... DEL MAR ANTEa AN DIE cp ...-.::::........ 32M5 E i 15 7 • ' QIR ?0 . FCLR .... .. . ...... SD GIS N MPERIALBEAC 3230 3230 3 0 3MiIes 100 30 w I- Ui z LL z Ui o - z Ui 4: I- w (I) U.. O 0 10 z 4: 0 -J Ui 0 EXAMPLE: Given: Watercourse Distance (D) = 70 Feet Slope (s)=1.3% -r- 1.8(1.1C)V5 Runoff Coefficient (C) = 0.41 - 3V-- Overland Flow Time (T) = 9.5 Minutes SOURCE: Airport Drainage, Federal Aviation Administration, 1965 jr"- 0 0--MM 20 !~ AAVA 3m3 - - - - - - - - - - - - - - - - - - - FIGURE Rational Formula - Overland Time of Flow Nomograph L EQUATION AE / L11_9LO.385 Feet Tc = E) -5000 Tc = Time of concentration (hours) I = Watercourse Distance (miles) h.400° LE = Change in elevation along effective slope line (See Figure 3-5) (feet) 3000 Tc I— Hoursl Minutes 2000 _L 240 3 1 180 —1000 900 800 _______ 2 120 ,T0 100 60\ 90 _50U'\ 80 —400 ' 70 60 —300 50 \ —200 40 L \ Miles Feet 30 —100 4000 20 18 3000 16 -50 0.5--14 -40 \\ 2000 12 1800 1600 10 30 1400 \ 9 1200 8 .20 1000 900 800 6 700 5 6 00 -10 500 4 400 3 300 —5 1200 L Tc SOURCE: California Division of Highways (1941)and Kirpich (1940) FIGURE Nomograph for Determination of Time of Concentration (IC) or Travel Time (It) for Natural Watersheds 3.4 PRE- DE VEL OPMEN T DRA INA GE MA P SCALE: 1"=10' / I/I I/I I/I PRE-DEVEL OPMEN T DRAINAGE JOB NO. 13-036 12/13/16 SOWARDS & BROWN ENGINEERING CONSULTING ENGINEERS 2187 NEWCASTLE AVENUE SUITE 103 CARDIFF BY THE SEA, CA., 92007 TEL. 760/436-8500 - FAX 760/436-8603 . ---••-•.• .. . ...--.-. ................................. ... ...........-...-..-.. .... --- --- .--- .H . . - H II II I POST —DEVELOPMENT DRAINAGE MAP SCALE. 1"=10' i I p . I I / .•I / I I / I .1' I 'I .7 .: I / .1 / LID / R I ASIN /7 Al = 11 584 SF = 0,036/AC; ,Ci= 0.57 / Iioo 6.59 IN/HR / Qioo =/ 0.14 CFS : 61 It / I? / * I .1 1 I e I I I * • . I I / S I I 1' Ii / / I / / I I* I '. S I / / S 1 / * / / / / / / / / if' BA SIN 4 A4= 41 213 S)= 0.097 AC C4= 0.82 Iwo = 6.59 IN/HR Qioo= 0.52 CI S C.', 34.30 31.55 gik FE JE OUT JJ. 30 is 31 3428 fr /5 \ I 4QQQ 1E 49 32 J.! I . UNDERGROUND VAULT I I, BOTTOM 2980 / I OUT 33 33 jI it, r I I I I I J / / I CIV I' \ / Ij•* I I/I I/I I/I is WASIN 2 I \,5',4 5'//.J 3 * A21= 1,333 SF = 0.031 AC I A3 = 1,490 SF = 0.034 A C N(kLN C TION 1 1 i. J!, 0.80 C3 = 0.85 * Qioo = 0.35 CFS * Iioq = 6.59 IN/HR Iwo = 6.59 IN/HR : Q i ôo = 0.16 CFS Q100 = 0.19 CFS 5"- POST-DEVELOPMENT DRAINAGE JOB NO. 13-036 12/13/16 SOWARDS & BROWN ENGINEERING CONSULTING ENGINEERS 2187 NEWCASTLE AVENUE SUITE 103 CARDIFF BY THE SEA, CA., 92007 TEL. 760/436-8500 FAX 760/436-8603 ..--. .-.---.--. _________________ _______________________...-. __________________........________________ .-.-.-..-....-.-..-... __________ __.• ............ .•••........................ . ....__-.__-_.. .. .......--...-.--- ...... ........ ....,. E i ..i ..