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Parks Plaza
The following Study Was Prepared For: Parks Plaza, LLC. 17490 Arrow Blvd. Fontana, California, 92335 DR # 02 -017 The following Report Was Prepared By: Patrick P. Liu, P.E. 4826 E. Somerton Avenue Orange, CA 92867 Tel: (714) 283 -2940 - /s;gc -I N 9 - � l < 1� Z� No, C47547 EXP. 12/31/07 * _ V - 1 \- /\ CAL- Prepared By: Patrick Liu, P.E. Job No.: GCO31204 February 10, 2004 ITMVED 0 0 t Table of Contents I. INTRODUCTION II. HYDROLOGY CALCULATIONS A. Methodology B. 100 -Year on site hydrology III. APPENDICES A. Summary of design data and criteria B. References C. Supporting Documentation from San Bernardino County Hydrology Manual IV. EXHIBITS A. Hydrology Map • 0 0 • I. INTRODUCTION This Hydrology Study was prepared for development of commercial shopping strip at 17490 Arrow Blvd., Fontana, CA 92335 and legal description is Parcel 1 of Parcel Map 5212 as shown on a map filed in Book 23, Page 42, recorded in County of San Bernardino. The site is located at northwest corner of Arrow Blvd., and Tamarind Ave. The proposed watershed is approximately 1.3 acres on Parcel 1 and 0.52 acres on Parcel 2. The primary objectives of this study are based on the approved site and grading plans to calculate 100 years design flow. There are two existing catch basin. One of catch basin is located at Arrow Blvd. and another is located at Tamarind Street of the northwest corners of both streets. They will collect storm water by passing Arrow Blvd. to curb open outlet of the southwest side of Tamarind Street to continue the street flow. This street flow will be drained to Santa Ana River to Pacific Ocean. 0 c II. HYDROLOGY CALCULATIONS A. Methodology Hydrologic calculations to determinate 100 years design discharges were performed using the San Bernardino County Rational Method from the San Bernardino County Hydrology Manual, Dated August 1986. The Rational Method is an empirical computational procedure for developing a peak runoff rate (discharge) for small watersheds for storms of a given recurrence interval. The Rational Method equation is based on the assumption that the peak flow rate is directly proportional to the drainage area, rainfall intensity, and a runoff coefficient "C" which is related to land use and soil type. The 100 year and 10 year design discharges were computed at intermediate points by generating a hydrologic model, which divides the area in drainage sub areas. Each area is tributary to a concentration point that is determined by the existing terrain or proposed site layout. The following assumptions /guidelines were applied for use of Rational Method: 1. The Rational Method Hydrology includes the effect of infiltration caused by soil surface characteristics. These soil map ratings are based on a scale of A through D is the least pervious, providing the greatest storm runoff. The soils map from the San Bernardino County Hydrology Manual indicates that the study area consists primarily of soil type "A ". 2. The type of vegetation or ground cover and percentage of impervious surfaces also affect the infiltration rate. The runoff coefficient "C ", obtained using standard runoff coefficient curve, was used to describe the proposed site infiltration characteristics for the on -site condition. 3. The time of concentration for initial area Nomograph of the San Bernardino County Hydrology Manual was used to determine the time of concentration (Tc) for initial upstream sub areas. Initial sub areas were drawn to less than 10 acres in size and less than or equal to 1000 feet in length per San Bernardino guidelines. 4. Standard intensity duration curve data was obtained from standard intensity duration curve data of San Bernardino Hydrology Manual for the southwest portion of County. ® 0 k B. 100 -Year On Site Hydrology III. APPENDICES A. Summary of Design Data and Criteria 1. Rational Method 2. Soil Group "A" 3. 100 -Year Storm B References 1. County of San Bernardino, Hydrology Manual, Dated August 1986. C Supporting Documentation from the San Bernardino County Hydrology Manual 1. Hydrologic Soil Group Map for Fontana Area. 2. Time of concentration for initial sub area. 3. Standard Intensity- Duration Curve Data. D Use Manning Equation to calculate the pipe size of storm water. SAN BERNARDINO COUNTY STUDY NAME: F74- o AAR 01-Vi) 7 , C%tj 7 c HYDROLOGY MANUAL LS,, -Y EAR STORM MOM RAINIVAt ( /, L • E • o. 6 ° `"._ Committals* Am (Acres) =NN De% T T I Fs No 0 l i Pet Slope V fba.... hist Sobers* Total TO Typo olio. *lo. laeo► io/to ono. Tatty 2 75 tt, ?t. tthsc. Notes c 2. 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Illy. ,•-•-••••.•---...,,. ,... 1. i •• •, 4 II ..t ttl ::.1'... : fl.f..) - 1 . • '''''' ---- • - 4 ••••-' ?•-••• 4 - F • :I.., ......, - .. .... .. A • J... y :1/4 '..... 1',.; )... ,. ••• .:,.. • .1 v• ••• • :" ' ' • Arrimmerr' mraniummormiremaro , . 0 o . ' ' I ■ . ..:, 1 . ■ ! ! ACTUAL IMPERVIOUS COVER Recommended Value For Average . i. Land, Use (1) ' Range-Percent Conditions-Percent (2) . • I ,, " Natural or Agriculture • ' , 0 - 0 0 Public Park 10 - 23 13 ;,, .1 "; 'ft School , !, ! ict,! 30 - 50 • 40 ,, ir . l' • . Single Family Residen+lal: (3) . li LI 1 2.5 acre lots , ' .'. ' 5 . - 15 10 1 acre lots 1: I :. : , 10 - 25 20 2 dwellings/acre ! i 20 - 40 _ ---.. 3-4 dwellingqacr , l r- '(r 30 . --- 50 40 3-7 dwellingS/acr 1: 35 - 55 50 8-10 dwellings/ac a ' 50 - 70 60 More than 10 dwellings/acre 63 - 90 80 • Multiple Family ;Resilientiab, Condominiurns ' Y ' ' 45 - 70 65 Apartments I , : ! 65 - 90 80 "(6 Mobile Home Park :' ,!• 60 - 85 75 Commercial, DOWntn Business or Industrial '; ":. ;',11 80 - 100 90 10.', ,! ' 1, ' • . ;!, • Notes: , . 1. Land use Should be based on ultimate development of the watershed. Long range maser plans fOr the County and incorporated cities should be reviewed to insure rpasonable land use assumptions. III , lq 2. RecommeridedValuet are based on average conditions which may not apply to a particular st:Oy area. The percentage impervious may vary greatly even on comparable sized lotadue to differences in dwelling size, improvements, etc. Landscape,,pra tices should also be considered as It Is common in some areas to use orname tal grayels underlain by impervious plastic materials in place of lawns and shru a. A !field investigation of a study area shall always be made, T and a review of 'aerial photos, where available, may assist In estimating the percentage of impervious cover in developed areas. 3. For typical equestrian, subdivisions increase impervious area 5 percent over the values recommended in the table above. • .. ., 1 N(-(° • SAN BERNARpINO COUNTY ACTUAL IMPERVIOUS COVER • HYDROLOGY .;MANUAL ;1.. DEVELOPED AREAS , . . d .!; c-8 Figura C-4 '! I f I 37 `n a ge0. ' A `' Vii. ' ' ,, = 2 � g Pl. {-f = 3, . H T�' ; !' ' I q T • LIMITATIONS] C ----- �°. � n /,d 2100 I. Maximum length • 1000 Feet, Tc • 1000 *- 90 2. Maximum area • 10 Acres ( W ill • 900 1.; �► .,i i 7 0 800 ' .. I 6 ' • Y w a * g r-2g% -300 A 700 —too 7 N — . 2 i. - l°o c 600 ....5o1 , b eo i o r40 , ' / l r.. 3° I . g —1� o • 5 00 � j; s! - I it'll K Pj. 11 .8 400 I - 30 1 1 i° Undeveloped 0 .. = 3 s - E Good - — _ 12 I I 350 r L 261 1 ! Undeveloped . c = 13 a I i`' Fair Cover _ — I 300 ' : Undeveio d _ 4 1 i 2 �f S 9 • ! 1 i ;i Il! Poor Cover c = ' 3 l 16 9 $ A-). 18 1. 1; Single Family - „ - E 230 l : 17' ' (s -7 ou/*C) _ R *.. ; ,� •a 18 5 .� 16 - - e d) - 80 • 19 I- • 200 t I3 ;; . i / 1 L H- Tc -K -Tc' a • -J i • 12 Z1 ` ft. • 11 o 25 a ' pevelopment 150 'f' 9 '' Q- Apartment 0 1.. i' 8 , ' A i - Mobile Home 30 . 7 ;1, ( 5- Condominium E • '' 0 - Single Family-5,000 ft Lot F 7 + ,' ,, 4 0- Single Family -1/4 Acre Lot 35 * „, • ± t0- Single Family -I Acre Lot 4- 6 1 i 0 - Single Family -21/2 Acre Lot 100 ' I i ' ' EXAMPLE' 40 +" 5 A I) Li 550, HsS.0', KS Single Family (5 -7 DU/AC) li'.evelo Tcs f, 12.6 min. 4 i ' ;N2) Ls 550', Hs 5.0', Ks Commercial i men De elopt, Tcs 9.7 min. SAN BERNARDIt O COUNTY TIME OF CONCENTRATION NOMOGRAPH HYDROLOGY MNUA►L;. FOR INITIAL SUBAREA Figure 0 -1 D-4 ' 1 Q i I-: (76 FT, 91-_. 2.4- I,. Tc ;•,1:1' LIMITATIONS* G - 5' �� n ,...1 ._ 1 ,i`l. 1. Maximum length • 1000 Feet, Tc 1000 90� 2. Maximum area • 10 Acres 5 900 1A'80, ' lir V w 800 .70 •-- u A. 111 6 ,k I . 1 x M g ` 60 I . i ,� o „. - 300 • 700 , e a Imo 600 1 1 Ii'j i 3• C ti: ' at-_ o : 1 : , I ' 1ali «. I ' r1 b0 500 1 .. • '�� 10 .. � 35' I � 4 ; . i o o. �- e g ^.e K pl':- 11 I s 5 400 X30 ' Und — wbped.,_0 - _ = ! G ood Cover 12 0 350 s 25 ;, I Undewb • • ....0 = ° !i 13 t 15 E Fair er _ • ii /14 ` M a i • r . • evelo d . Ill 15 • ' r 3w , k g s .; 0' 1 �', • • • r Co w w c 0 - 1 - 19 —so 2 16 5 o -; Et nge amy a.. R & 250 t 7 (5 -7 owac) i7 18 ` 5 C C rclal i •9 19 ° • "14 1 P +.1 (Paved) 80 • ! _KEY..., _KEY..., ZO E- ° 200 t 03 III • i L -H -1 -K -Tc' o , i :12 ! 0,N , ... l " o i � X11 '! 25 f . "10 i t • evelopment 150 E 9 :- Apartment .. 11' Ill' ! .: - Mobile Home 30 0 r ,. . ;65- Condominium • . • • • • ; 16 Single Family-5,000 ft Lot F 7 ! ' 4'0- Single Family -1/4 Acre Lot i ,20- Single Family-1 Acre Lot 35 ' ' .6 ! 1 . � 0 - Single Family -21/2 Acre Lot • 100 !I' . 40 B G� ! a 'ii�F ', ' i '1) Ls 550', Ha 5.0 Ks Single Family (5 -7 ou /AC) .Cl Tcs12.6 min. 1 ; t 4 •2) Ls 550', H115.0; Ks Commercial ' 4 D elopment, Tcs 9.7 min. Y SAN BERNARD 6 '`0UNTY TIME OF CONCENTRATION NOMOGRAPH HYDROLOGY M4NU ly I, ! FOR INITIAL SUBAREA h'' � h l' ' ' Figure 0 -1 � , 4 D-4 1 ! 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PROJECT Le, MN: ARROtn) el--0 A , , i 4 :1 . . ,1, , ` il i 1, INTENSITY - DURATION ) SAN 8E1, A DINO COUNTY , i CURVES . i 1 1 , HYDROL' OG M NUAL CALCULATION SHEET 1 , ,, , , .... '7' r, ,t, :, _...a i: ; ' ' ' FIGURE 0- 3 D- 8 1 . 1 ' I, 1, IIL 9.0 e.o 7D 6 5.0 4.0 - - - Mm 3.0 0 lu mom smonecon son �sfsftmnwu 2_O w . malomwe� III loom ..sI 11$ �a •..i - 11111 )- _MamlI,uuunhI , • M. —=;ii;i� .,. II . ._ail _ Dom __.__ - *&____.__....._..._.___._ . 09 1- 0.8 07 _.I I S rn • *.0aaafl.SS.t...I -J Li.. a5 1 ===== m 04 O3 - ; 02 "EE Fe i 5 - IsH one ulot :EL ... 1 I. Ll I uaa . --- .mjIm Ij sIs4t� pup il 1 .mai.j H N3R2ITh! 1 I•IP1SIN1ITW ISSUNI* — fl3U1411 hil IilhIl2L t ..sIrfls.flR lHhIUUII 1 .q$IuuIIuuue.m PIJINLZIIII MIUUIIUS*UIHsu uIMaINuIi .nIuu___ - %IIuTtNlM.a . 2 3 4 1 6 T S 9 10 20 30 40 50 60 TO 10 10 L 1 STORM DURATION (M DESIGN SI j'ENCY: 10 Y ONE HOUR P0 NFALL t).? INCHES ;I 0IJ I- % TAFPJ SAN B NO COUNTY INTENS R , RATlON HYDROLQG 4AL CALCULATION SHEET D-8 FIGURE 0-3 Q Q • Circular Channel Analysis & Design Solved with Manning's Equation Open Channel - Uniform flow Worksheet Name: ARROW & TARMARIND Comment: STORM DRAIN PIPE SIZE Solve For Full Flow Slope Given Input Data: Diameter 1.00 ft Manning's n 0.014 Discharge 4.68 cfs Computed Results: Full Flow Channel Slope 0.0200 ft /ft Full Flow Depth 1.00 ft Velocity 5.96 fps Flow Area 0.79 sf Critical Depth 0.90 ft Critical Slope 0.0176 ft /ft Percent Full 100.00 % Full Capacity 4.68 cfs QMAX @.94D 5.03 cfs Froude Number FULL Open Channel Flow Module, Version 3.43 (c) 1991 Haestad Methods, Inc. * 37 Brookside Rd * Waterbury, Ct 06708 Q 4 Circular Channel Analysis & Design Solved with Manning's Equation Open Channel - Uniform flow Worksheet Name: ARROW & TAMARIND Comment: STORM DRAIN PIPE SIZE Solve For Full Flow Slope Given Input Data: Diameter 1.00 ft Manning's n 0.014 Discharge 3.66 cfs Computed Results: Full Flow Channel Slope 0.0122 ft /ft Full Flow Depth 1.00 ft Velocity 4.66 fps Flow Area 0.79 sf Critical Depth 0.82 ft Critical Slope 0.0123 ft /ft Percent Full 100.00 % Full Capacity 3.66 cfs p/( QMAX @.94D 3.94 cfs Froude Number FULL Open Channel Flow Module, Version 3.43 (c) 1991 Haestad Methods, Inc. * 37 Brookside Rd * Waterbury, Ct 06708 Circular Channel Analysis & Design Solved with Manning's Equation Open Channel - Uniform flow Worksheet Name: ARROW & TAMARIND Comment: STORM DRAIN PIPE SIZE Solve For Full Flow Capacity Given Input Data: Diameter 1.00 ft Slope 0.0070 ft /ft Manning's n 0.014 Discharge 2.77 cfs Computed Results: Full Flow Capacity 2.77 cfs Full Flow Depth 1.00 ft Velocity 3.52 fps Flow Area 0.79 sf Critical Depth 0.71 ft Critical Slope 0.0095 ft /ft Percent Full 100.00 % Full Capacity 2.77 cfs y a, 32 �s o/c @.94D 2.98 cfs Froude Number FULL Open Channel Flow Module, Version 3.43 (c) 1991 Haestad Methods, Inc. * 37 Brookside Rd * Waterbury, Ct 06708 IV. EXHIBITS A. Hydrology Map - - - --- — -- — — - 4 .40 L 1276. 0 RIM ..—. i \ \ f / ,, , ' , ail 7 4 - _ . • . L_____o , 1 N I ■ ,, ati% SCALE IN FEET \ i i 1i 1 . 1275.1 INV Iiii 1 inch = 40 ft. 0(100 2.32 CFS I • ........._.:3_ _a__.._• ....._ — • • 1 - ' — Tc=6.9 MIN. — I X kl LEGEND 1 , '1 1274.86 FL tirk --..--- • 06.6 ',MEM' -- DRAINAGE AREA BOUNDARY N 1273.38 INV L=176 ' ‘ Q(100)=3.66 CFS 0 R100) 1.57 CF 141. / I — ' 1\3 . =730 MIN. Tc-;5.,60 _ IN. : — DRAINAGE AREA DSIGNATION a - - - - ) \ 1 I, 1 B1 - . ___-...... A . . 0.52 AC 03 k co m 4 o , 1 ........ ,;: © • ` I 1B co. 1. 0.42 AC N *1 ACRES oilp ° /I\ e 0 NODE DESIGNATION $ i INI■ N'. %.,, , tv o . _.. LO II I 1 _1274 a / 1 —0— DIRECTION OF FLOW 127203 INV e .--,-. . 0 , I 0.30 L LENGTH OF FLOW PATH '-'& r 114 \ _° '''- I F '• • ; - P - I 1 I N. l it ri ,[z=7.69 AC ( , i . • Q(100) CALCULATED RUNOFF (cfs) 1 --.\ i E • , , -■ 1, 1 II .09 I Tc TIME OI O P FC N O T NCERNTRATION (min.) ilin ' I ' 1279 H H.P. HIGH .11-lio, .. Nri. 1 ( 271. 0 V i i . ' Ais 0 8 A C Al 1276 1 " V ,ti ,,Q. 7% =449' I. e ------- . . j280.44 HP( ViJo(00)=' 75 CFS __ N Q07249 • -,... , i'' Tc=7 84 ) N. — ' — ' ' — — ------'— -------- --- 767orrm Ls r — —GB— -- —G.— V ---- --- --- -- — en ---- 1277 - - — .■..- .■_. 0 12_71.' • /NV ___ -- . — —1 — 000C9=2.28 CFS TA i ND AVE. Tc=9 04 MIN. 1 0 2 49 W 1 i ----- / I I 06/14/05 14 Patrick Liu & Associates HYDROLOGY MAP SHEET Civil • Surveying • Plannin 17490 ARROW BLVD. 1 4626 E. Somerton Avenue OF Orange. CA 92867 FONTANA, CA 92335 (714) 283-2940 CAI (714) 283-3469 1 PARKS PLAZA, LLC. _ C \drawings \Gaon?* K Chou \GCO3120.