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Home My WebLink AboutCT 04-18; OCEAN MIST CONDOMINIUMS; HYDROLOGY AND DETENTION DESIGN CALCULATIONS PROPOSED 5 UNIT CONDOMINIUM PROJECT; 2005-06-17Resource Development Corporation CIVIL ENGINEERING • SURVEYING • PLANNING 150 2 A / JNO1-021G June 17, 2005 Page 1 of 14 nJ HYDROLOGY AND DETENTION DESIGN CALCULATIONS PROPOSED 5 UNIT CONDOMINIUM PROJECT 335 OAK AVENUE, CARLSBAD Hydrology and Drainage Design Calculations by: RESOURCE DEVELOPMENT CORPORATION Brian Donald, RCE 26175 License Expires 3/31/06 a ¢AA tiO CIV/4 h BRAN ='r Do 6,1O No. 26-17 5 CIVIL Professional / CA Q4 es ot 914 N. COAST HIGHWAY 101 SUITE E • ENCINITAS, CA 92024 • TEL (760) 942-1106 • FAX (760) 942-1146 Th f dItc..ut Mso Reitibuyi i re "2111' • amt. • , , Vilk-y Cats • La' Esmn; • Onsbad • Lah, ,11..11403 17,crc,14.1 F+4 • t G.tif by • ' SOtit I 411.44:( DM$ ..• • tiann;anli war..43, ,17.,or4 • , OM, ti4 Sdu V,'77 nn."4.1 C1.1).41t144 7."'? knewii AilOrP ., ..— I.rionctimt 1,A700ii.1.1. * F.I C'tiwi ,....'•, .,,,,,C‘;17,7I,L4**:,,,,,,i'*'-.4:i4I4.. ..`.;;' * F41 it nth., Pity,. (LAI 0.1, W4JI -70:11 1.5W1 I an. GLI/ 111130t1 : Aulfmil E.3. GRivR so ,,, ,••• .. amar : ....r.'• Wu..., 4.1 Arra . 447 jZff OW ; %PI', z-, •• ,-.; , II. t. ,or :.,Grv, . -, ,....,.. ,,,..4_1.3:_a vi:4t: ,.. t.,t....,atr,,,,, ,,,..• ..' r.:,,,, iiionlvet,htai, . , .. ,,...!; 141er,-, - . f7inaltr,V.7,11: AqL7:4:31britt to717q.,1.1 t,,.1.0113 County of San Diego Hydrology Manual Soil Hydrologic Croups Legend ___ Group A S Group B wig Group C Group D _ Unricitetrninod (Made or Urban or Guided or Escarpments) Data Unavailable Map P.,Inte !Ailey:die 4IUft5I1It Zundi. 14/47133 CI eihui edit: June la 2031 M170 BE USED FOR DESIGN CALCJLA-IONS 7 5 RESOURCE DEVELOPMENT CORP. 914 North Coast Highway 101 Suite E ENCINITAS, CALIFORNIA 92024 (760) 942-1106 bdonald@rdc2000.com JOB e)1. 0 2 l SHEET NO OF CALCULATED BY DATE t2/� ie CHECKED BY DATE SCALE County of San Diego Hydrology M anual 100 Yea+Rliriall Evert 61-bus i^ Jsopuvial (inches) P6 = 2.5 INCHES ID Ndea 9ampWeP olvt Z. wioe3 Chalon Wall* 222001 Ma TcsEus®Kn 0(610N 0.1.anAT1 S onfi MILES rnec ' RESOURCE DEVELOPMENT CORP. 914 North Coast Highway 101 Suite E ENCINITAS, CALIFORNIA 92024 (760) 942-1106 bdonald@rdc2000.com JOB 1 "1/ EP SHEET NO OF CALCULATED BY .?0 DATE _A C 1 CHECKED BY Cr/pet, SCALE DATE County of San Diego Hydrology M anual RaiNall I sopluvials. 100YeanintaltBrent 24 Hwls !� Isopl wial (inches) P24 = 4.0 INCHES Mao Ndes &maple., RopL Zones, NAL 3 (Melon IAleuhe 22. am Na T®EUSIO RII INEIIQ1 042CRAT1SS e MILES c JOB o1 -c72t RESOURCE DEVELOPMENT CORP. 914 North Coast Highway 101 Suite E ENCINITAS, CALIFORNIA 92024 (760) 942-1106 bdonald@rdc2000.com SHEET NO5. OF CALCULATED BY Z / '/ DATE C . / 47 CHECKED BY DATE SCALE Table 3-1 RUNOFF COEFFICIENTS FOR URBAN AREAS Land Use Runoff Coefficient "C NRCS Elements County Elements. :Soil Type % IMPER. A B C D Undisturbed NaturalTerrain Low Low .Low Medium Density Residential Medium Density Residential Medium Density Residential Medium Density Residential High Density Residential High Density Residential Commercial/Industrial Commercial/Industrial Commercial/Industrial Commercial/Industrial Conmercial/Industrial Permanent:Open Space Residential, 1.0DU/A or less Residential, 2.O DU/A or less Residential, 2.9 DU/A or less Residential, 4.3 DU/A or less Residential, 7.3 DU/A or less Residential, 10.9 DU/A or less: Residential,14.5 DUTA or less Residential, 24.0 DU/A or less Residential, 43.0 DUJA olt less Neighborhood Commercial General Commercial Office Professional/Commercial Limited Industrial General Industrial 0* '10 20 25 30 40 45 50 £5 80 80 85 90 90 95 0.20 0.27 0.34 0.38.... 0.41 0.48 0.52 o.55.... 0.66 0.76 0.76 0.80 0.83 0.83 0.95 0.25 0.32 .41 0.45 0.51 0.54 0.58 0.77 0.80 0.84 0.84 0.95 0.30 0.36 0.42 0.45 0.48 0.54 0.57 0.60 :_ 0.69 0.78 0.78 .,... 0.81 0.84 0.84 0.95 0.35 0.41 0.46.. 0.A9 0.52 0.57 0.60 0.63 0.710� 0.79 0.79 0.82 0.85 0.85 0.95 • *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, co, for the soul 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 id Cleveland National Forest). DU/A = dwelling units per acre . [ ..•1 NRCS = National Resources Conservation Service t-a01- atop/reed-- -s La!h 4 ilia 4- Al CO)4 6S)-E61) bOEt 6t-4-TET 2=1- .v)rc[,.t Lea+a.1) -= O.85' C CornL e 5to CAI CA JOB OL —OZ1� RESOURCE DEVELOPMENT CORP. 914 North Coast Highway 101 Suite E ENCINITAS, CALIFORNIA 92024 (760) 942-1106 bdonald@rdc2000.com SHEET NO CALCULATED BY 51) CHECKED BY OF DATE DATE Gyl'7/v:i SCALE f RE - DEVELOPMENT STORM RUNOFF CONDITIONS • Berm AJIENJ •s f�. DUST BLDG ,-(-` 1 600 SQ FT , —ul®I — 10,700-ssft 0.25;acres N� °a z 0 1 rn SITE , ` Al o,000-keft = o 0 ! ll� l TI +s s Berm / TOTAL SITE AREA: 16,800 SQ FT EXISTING IMPERVIOUS AREA: 2,300 SQ FT (14%) RUNOFF COEFFICIENT FOR TYPE B SOIL = 0.38 SCALE: 1° = 40' 0 20 40 60 80 100 JOB C 1 "o2 , RESOURCE DEVELOPMENT CORP. 914 North Coast Highway 101 Suite E ENCINITAS, CALIFORNIA 92024 (760) 942-1106 bdonald@rdc2000.com SHEET NO j CALCULATED BY V CHECKED BY SCALE OF DATE e..0/17/L)5 DATE 500 ro .4? 400 z w 300 U a 3 200 re w 3 100 0. N EXAMPLE: Given: Watercourse Distance (D) = 250 Feet Slope (s) = 0.5%-- Runoff Coefficient (C) = 0.70 Overland Flow Time (T) _ 14.3 Minutes SOURCE:. Airport:Drainage, Federal Aviation Administration; 1965 _o 1 70 c0.90 9 60 50 INa z z w O LL 30re 0 20 T_-1:a(1:1-c) D s Rational Formula - Overland Time of Flow Nomograph HezMadCounty Hydro9eology Manual/Overland FIow.FHl CLAY 1 -rr-rvn A 10 0 �kt FIGURE 3-5 `i °7 JOB 01 w21 RESOURCE DEVELOPMENT CORP. 914 North Coast Highway 101 Suite E ENCINITAS, CALIFORNIA 92024 (760) 942-1106 bdonald@rdc2000.com SHEET NO. OF CALCULATED BY ri".' J DATE C/1 I eyt,� CHECKED BY DATE SCALE Pre -Development Site Drainage Areas 6/17/2005 Area No. Area (Acres) Description Drains to: 1 0.14 W'ly from ridge W'ly P/L - Sheet Flow 2 0.25 E'ly from ridge Ely P/L - Sheet Flow Pre -Development Drainage Area Flow Calculations Q100 = C * 1 100 *A Tributary Area A total C 1100 Tc Q 100 (Acres) (in / hr) (min) (cfs) Al A2 0.14 0.38 0.25 0.38 5.30 7 0.28 4.50 9 0.43 RESOURCE DEVELOPMENT CORP. 914 North Coast Highway 101 Suite E ENCINITAS, CALIFORNIA 92024 (760) 942-1106 bdonald@rdc2000.com JOB n lZ SHEET NO OF CALCULATED BY DATE • t"VC, CHECKED BY DATE SCALE POST - DEVELOPMENT STORM RUNOFF CONDITIONS Z21 � s — ;— — 'p Berm OAK AVENUE. m 4 00 I» - '1 111 a` RENT \t, J 51TE PRt1POSID BLDG 2 Niv s a�> Be, + TOTAL SITE AREA: 16,800 SQ FT EXISTING IMPERVIOUS AREA: 10,125 SQ FT (61%) RUNOFF COEFFICIENT FOR TYPE B SOIL = 0.67 SCALE 1n = 40' 0 20 40 60 B0 100 60 50 40 5 0 30 0 Z 5 0 20 0 FIGURE 3-5 RESOURCE DEVELOPMENT CORP. 914 North Coast Highway 101 Suite E ENCINITAS, CALIFORNIA 92024 (760) 942-1106 bdonald@rdc2000.com JOB d I `vZ L SHEET NO. 10 OF /' / �} / CALCULATED BY V DATE C,/ 1 l /d S CHECKED BY DATE GGG SCALE 500 400 z W 300 U z Q ' 13 O K ' U 200 100 O`er CQ n .t C, i-i b /._lr, 70 o d o ry el e�= b P EXAMPLE: Given:. Watercourse Distance (D) = 250 Slope (s) = 0.5% Runoff Coefficient (C) = 0.70 Overland Flow Time (T) = 14.3 Minutes Feet SOURCE: Airport Drainage, Federal Avia6on.Administration, 1965. T = 1.8-(1.1-C) D � s Rational Formula - Overland Time of Flow Nomograph H Mat/County Hydropeolopy Manual/OverlandFlow.FM6 m to JOB dl ...-C77 RESOURCE DEVELOPMENT CORP. 914 North Coast Highway 101 Suite E ENCINITAS, CALIFORNIA 92024 (760) 942-1106 bdonald@rdc2000.com OF CALCULATED BY , V DATE CO/ I Ve).5 CHECKED BY DATE SCALE SHEET NO 1Dp11►`.►1M1I1111111I11111111I a p y p oa ►O`R12►2lB�:C:�11111111 11ON1NCgii11:119111 110b11:111u111111111111 11I11I111I1111111111111 I 1 1111111 IIIIIIIIIIII11111111111 111111111111111111111111 IIIIIIIIIIIIIIIIIIIIIIIIIIIU111111111IIIII11II11111 I IIIIIIIIIIIIIUUUUIIIIIII1IIIIIIIIIII IIIIIIIIIII 1 IIIIIIIIII EQUATION IIIIIIIIII I I 11111 I 11 I Directions for Application: (1) From precipitation cps dotarirue 6 n1.nd 24 N Amounts for the selected frequency These maps are inducted in the : County Hydrology Mul°.50,and100yrmap.indud.d - 5 p 1■1,111,11111. io.h!1 i! III II I11I 11111II11II III 1 c 7 4 PB D-0.645 III 1 (2) 64) in sDesign and Ptocedura t6 hi pre PitabO (if necessary) so that 8 is within a 0 111111!W 1111w'II II IIIIII! 111111101IlIII P6 F 6J4nu Pre.040O (n) IIII the g of 45 to65% f the 24 hr preapilaCon (not b Desert) \ , �1 1 1 11 111 1 II D F Duration (min IIIIII ppl pl . tfihr on the e of the 1221011 1111i11111�1110111111111I 11111111l��III!. II 1111111111111III 5ght W eepontpantbon hePoCadInes 011111N1111lIIIM191 it I ! i i! 111ii �111111111111111 1 I ')D alli eCroeup o (5) is the nta ,y.d nlon curve for 61e location ,011:11111111111111!111111II 11!Ig1.1Ii1 niU ii W111 „111111111111ll ailine n IIIIII,\. �IIIIilI1!!II 11 III I11111111111111111111111 ii III!!li!m 111 I1111 II!u1111! 1 111 1 II 1111111P111111 `\YI I I Application Form: I (a) Se .d d tieq nay l�.er g 0 �'�'�I'I�I'1111II�II \Ill 'III II IIIIIII II ' IIII (IIIIIII IIIII 111tl 14 II MV11 gill ib1'Ill�11111! R1! 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IIII IEI :: • III nl 1 0 16 10 so U 60 z . 36 a 60 as 2se 00 Las 5 ]89. sb 3 2.39 9Iili 1 20 3146s39 b e6__ 0 40 a] Z A0, 7 3 4120 ] 465 i 3 660 ass 7241.66 am 2.40200 ] se . 96 03 34 202 6 3 3.45 07413 060 090 -w 8 D EB M Za 206 lYi 359 0 OM as 33169186) 2 236266 2.92 318 - O,e2 45 4 6 w t.a Z. 11111 IIIII 11111111 f11 1111111111111111111 11111111 1 11■■■■ 1111Etl II 11111111 11 1 1 1 1 `1m 6: 0a6 .r"'0s s3 ia2 94 12,. 111111i11111111I111111111111111111I11{111111111111I111111111111 6 3 a D 10 t5 1111111111111111 30 40 Minute 11111111111111111111 50 Owalion.l 11.NN■110111111111111111111 IIUi111111111111111111111111) Hairs 3 . 4 160 1 000 010 20'044 060 0 3 owe m' 1 a 1.62 re09606205s 0.721.0.911 w a 1.44.fa. 013 04J 61 035 0is 010 094 0a 8 .10 019 020 J/4 042 O. 060 Dxs 0850a4. 1 air'025 am 642 ban 6se 0.6r-O:is-Ora 022 I00• A ,c `t1 yard) t= Inten.ity-Dura9ion D..Ipn Chart -Template C " 00 We T'y4W r,- tro 6 Y,ermrAL 1) Cac �4.-(4 1 t vh,+C1 CA lc 1944 A9,,..,X,, ( , cocyr..gv ryx. at".13e1.- CArri y (Clr'� �e-tu-A u�/ =15 rr►, n = ,.�, c2—Ci' fi.n/1 �r 9c1 n^.e' 'P.O.— rCx7 4�t �)1 � 8e- �aCCa t'ems ►ram 44Pua % 1 w� . CAn,e4--Ntat,� e,1 o1.5›.1 me- 2 l� Pix tin %/ € 0 vy tr, . ( to i ne. `A( e51.c te-) --)-: re1= ( 6c. _- Go "f m +r, alt. T 1 z 5 .5,n/6— JOB p1 -VL RESOURCE DEVELOPMENT CORP. 914 North Coast Highway 101 Suite E ENCINITAS, CALIFORNIA 92024 (760) 942-1106 bdonald@rdc2000.com SHEET NO. �+ OF CALCULATED BY Tap DATE <e/i 1/0 S CHECKED BY DATE SCALE Bio-Filter Channel Flow Calculations Open Channel Discharge Facto K' = [Q n] / [ ( b**(8/3)) * (S** (1/2)'] Q = 1.16 cfs n = 0.20 b = 6.00 ft s= 0.01 ft/ft K' = From King's Handbook D / b = Flow Depth = Flow Area = (b*D) = Flow Velocity = Q / A = Channel Length = Flow Timms in Bio-Filter Channel = L/V = 0.01952 0.07 0.42 ft 2.52 ft^2 0.46 fps 185 ft 401.9 sec Trapazoidal Section Trapazoidal Section 6.70 min mr\ Inc p a s l IDA-7e2, on es in; l'.NtA•2tel or) JOB RESOURCE DEVELOPMENT CORP. 914 North Coast Highway 101 Suite E ENCINITAS, CALIFORNIA 92024 (760) 942-1106 bdonald@rdc2000.com SHEET NO 1.5 CALCULATED BY 1 0'D OF DATE C.AVi7 lc 5- CHECKED BY DATE SCALE Post Development 100 Year Storm Runoff Site Drainage Areas Area No. Area (Acres) Description 1 0.05 Driveway 2 3 4 0.08 0.08 0.07, 0.07 Roof Roof Rear & W'Iy Side Yard Rear & E'ly Side Yard Drainage Area Flow Calculations 6/17/2005 Drains to: Grate Drain then Sump Pump then Bio-Filter then Storm Drain Rear & E'Iy Side Yard then to Curb @ NE'ly Corner Site Rear & W'ly Side Yard then Bio-Filter then Storm Drain Bio-Filter then Storm Drain Planters then surface flow to Curb @ NE'ly Corner Site To Sump Pump Outlet To NE'ly Site Corner To Bio-Filter To Storm Drain Tributary Area Al A2 + A5 Al + A3 + A4 Al + A3 + A4 A total (Acres) 0.05 0.15 0.20 0.20 Notes & Assumptions 1 Assumed Min Tc 2 Ignore Tc on Roof - Conservatively Assume Tc = Yard Overland Flow Time Only 3 Assume Tc min = 5 Min - Ignore Driveway & Roof Plow Time - Use to Calc Flow lime in Swale Use Calc'd Swale Flow Time; Ignore Driveway & Roof Flow Time 1.00 0.85 0.88 0.88 Q100 = C * I 100 * A I 100 Tc (in / hr) (min) 6.60 5 4.00 11 6.60 5 5.50 6.7 Q 100 (cfs) 0.33 0.51 1.16 0.97 Notes (See Below) 2 3 JOB dl -c221 RESOURCE DEVELOPMENT CORP. 914 North Coast Highway 101 Suite E ENCINITAS, CALIFORNIA 92024 (760) 942-1106 bdonald@rdc2000.com SHEET NO CALCULATED BY 1=3D CHECKED BY SCALE OF DATE </ t 7/ei.°5- DATE SITE DRAINAGE AREAS & Q100 +s, OAK AVENUE � Dorm EXISTINS PUBLIC STORM DRAIN / • INLET and PIPE TO PUBLIC STORM DRAI rnr +"re, DRAINAGE AREA No. 4 BIO-FILTER LOCATION (TYP)' GRASSY SWALE ( O RAINAGE ARf* No..1 0.06 AC Q • INLET (.9c 0 0 INLET-PtfMP-- Qin = Qm,,t = 0.33 cfs 1 w 11 L \ 3 DRAINAGE A 1 DRIVEWAY—, 2 Ely 1/2 o 00Fj 3 Wily 1/ of-R09 / 4 REAR & W SIDE YARD 5 'REAR & E' Y SIDE;YARD sToI `moo ! Berm I t. W1 SCALE: 1" = 40' 0 20 40 60 80 100