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799, Gradling and as built drainage, Studies & ReportsStudies & Reports HYDROLOGY STUDY & HYDRAULIC CALCULATIONS FOR 2 APPALOOSA LANE, ROLLING HILLS, CA. JN 2007449 OCTOBER 14, 2010 B & E ENGINEERS 24 W. ST.JOSEPH STREET, ARCADIA, CA. 91007-2854 TEL. (626) 446-4449 • • • • • 2 Appaloosa Lane, Rolling Hills, California Background In 2009, there was erosion at the subject property, along the east side of Appaloosa Lane, toward the northern portion of the property. The property owner, Dr. Jim Black, consulted with the City of Rolling Hills so he may mitigate the erosion and prevent any further erosions that may cause any damages to his property. The outcome of the consultation with the City was that he may import up to 500 cubic yard of fill material to grade the eroded area for mitigation purposes. As a result, a little less than 500 cubic yard of fill material was imported from a nearby construction site, and was used to fill the eroded slope. Additional grading was done to a limited extent to promote a better drainage through the area. Existing 24" diameter storm drain pipe, that crosses Appaloosa Lane into Dr. Black's property, was extended approximately 22' to a new un-grouted rip rap of approximately 390 square feet. Additional pipe inlet was constructed on the east side of Appaloosa Lane and approximately 58' of new 24" diameter storm drainage pipe was installed to the newly constructed rip rap. Photographs of the current conditions are included on the following pages and the summary of grading work is as follows: • Cut Quantity: 368.1 cubic yard • Fill Quantity: 841.8 cubic yard • Import: 473.7 cubic yard • Total Affected Area: 19,300 square feet Dr. Black was recently contacted by the County of Los Angeles and has found that a grading permit was required for the completed construction work. A permit is also required from the Department of Fish and Games as the grading took place within a blue -line stream. B & E Engineers was hired to obtain required permits and obtain approvals from the City of Rolling Hills and County of Los Angeles and has prepared a grading plan and a hydrology study for this purpose. B & E Engineers was previously hired by Dr. Black in 2007 to perform boundary and topographic survey for the subject property. We recently have done an additional topographic survey to compare the pre- existing condition in 2007, prior to construction, and the current condition. The prepared grading plan depicts the changes in topography and construction of new drainage pipes as discussed above. Additionally, we have prepared hydrology study and hydraulic calculations to determine adequacy of the capacity of the 24" pipes. While it was determined that the pre-existing 24" diameter pipe and the inlet structure will cause spill -over to the street during a 50 year frequency storm, this is a pre-existing condition that was not affected by the recent construction. The newly constructed 24" diameter pipe and its inlet structure have a sufficient capacity to carry 50 year frequency storm runoff. B & E Engineers JN 2007449 • • • Photographs 1: Rip -Rap at the outlet of 24" diameter storm drain pipes. 2. New inlet to 24" storm drain pipe. B & E Engineers JN 2007449 • • • 3. Graded area. 4. Graded area. B & E Engineers JN 2007449 HYDROLOGY CALCULATIONS • • 20o1 44.P) oG ("1 I ID `S. itt,D `•C 1-Pc 1—o©,Sn. HYorzot.af,eiG DATA 5ot4`t 14-:!-:ir : 5(r)" ('.Th) cSolL Ck 9S - oaS Ts(P E* O F i 1a r1 v. APwt 7 = ku -- • • 33°52'30" Ras . try ar ''i�'. y.- ( 016 AREA SOIL CLASSIFIC.All0N 7.2 INCBES OF JL RAINFALL DEBRIS POTENTIAL AREA INGLEWOOD 1-H1.8 SAN PEDRO 1-H1.2 0 1 25-YEAR 24-HOUR ISOHYET REDUCTION FACTOR: 0.878 10-YEAR 24-HOUR ISOHYET REDUCTION FACTOR: 0.714 TORRANCE 50-YEAR 24-HOUR ISOHYET 2 Miles 1-H1.4 � CxJ �H a 33.45' 00" PUBLIC WORKS LONG BEACII Proportion Impervious Data Code Land Use Description 1111 High -Density Single Family Residential 1112 Low -Density Single Family Residential 1121 Mixed Multi -Family Residential 1122 Duplexes, Triplexes and 2-or 3-Unit Condominiums and Townhouses 1123 Low -Rise Apartments, Condominiums, and Townhouses 1124 Medium -Rise Apartments and Condominiums 1125 High -Rise Apartments and Condominiums 1131 Trailer Parks and Mobile Home Courts, High -Density 1132 Mobile Home Courts and Subdivisions, Low -Density 1140 Mixed Residential 1151 Rural Residential, High -Density •I 1152 Rural Residential, Low -Density 1211 Low- and Medium -Rise Major Office Use 1212 High -Rise Major Office Use f 1213 Skyscrapers 1221 Regional Shopping Center 1222 Retail Centers (Non -Strip With Contiguous Interconnected Off -Street 1223 Modem Strip Development 1224 Older Strip Development 1231 Commercial Storage 1232 Commercial Recreation 1233 Hotels and Motels 1234 Attended Pay Public Parking Facilities 1241 Govemment Offices 1242 Police and Sheriff Stations 1243 Fire Stations 1244 Major Medical Health Care Facilities 1245 Religious Facilities 1246 Other Public Facilities 1247 Non -Attended Public Parking Facilities 1251 Correctional Facilities 1252 Special Care Facilities 1253 Other Special Use Facilities 1261 Pre-Schools/Day Care Centers 1262 Elementary Schools 1263 Junior or Intermediate High Schools 1264 Senior High Schools 1265 Colleges and Universities 1266 Trade Schools and Professional Training Facilities 1271 Base (Built-up Area) 1271.01 Base High -Density Single Family Residential 1271.02 Base Duplexes, Triplexes and 2-or 3-Unit Condominiums and T HYDROLOGY APPENDIX D OA • Impervious 42 21 74 55 86 86 90 91 42 59 15 10 91 91 91 95 96 96 97 90 90 96 91 91 91 91 74 82 91 91 91 74 86 68 82 82 82 47 91 65 42 55 Prcgran Package Serial. Nu±er: 2099 06/29/10 FILE: PULLS IIEiTT DATA: English Units FAINFA1L SOIL FILE: Frglish (In) a r it DATA: Erglish Units PALE 1 IC6 AMEDES GOJNTY.EIDOD CCNTFDI, DISTRICT .. PROS F060114 MODIFIED RATIONAL Elmo Emma - SUM YEAR = 50 SOIL DATA FILE: E:\EELTI\2007449\cst_soilx_83.dat 2 APPALOOSA LANE 11OI,LD G BILIS CA 06/28/10 BR STCR4 DAY 4 SUBAREA SUBAREA TOTAL TOIAL OCNV OQIV OITI OQVV COW CONTROL SOIL. . FAIN "PCT LOCATION AREA(Ar;) Q(CES) ARFA(A.c) Q(CFS) TYPE IINTIi(Ft) SLOPE SIZE(Ft) Z Q(CFS) NAME TC ZLNE MTV 7449 lA . 26.9 , 46.82 26.9 . . 46.82 1 . 1050. .14762 . .00 .00 0..., 9 10 . A25 .10 7449 2A 19.8 36.43 46.7 . 77.40 4 75. .12907 2.00 .00 . O. 9 9 A25 ..10 7449 . 3B 6.6 15.41 6.6 15.41 4 58. .25103 2.00 .00. .0. 9 6 A25 .10 * 7449 4A TA 1157 Q1 77.28 CAB . 85.58 QB . 8.30 7449 4B TB 1154 •: 15.41 QPA 84.17 QA 68.76 * * 7449 4AB TAB 1156 CAB 87.49 QA 76.77 QB 10.72 SUBA.RII1. SUBAREA TOTAL 1OUAL CCTV CAN OCNV CCNV CCNV CONTROL SOIL P N ECT ILCATICN A.RFA(Ac) Q(CFS) AREA(k) (gas) TYPE INGUi(Ft) SLOPE SIZE(Ft) Z Q(CFS) NAME TC ZONE IMP/ 7449 4AB 6.6 15.41 53.3 87.49 0 0. .00000 .00 .00 O. 9 0 A25 .00 Project Subarea 7449 1 A 7449 2A 7449 3B T.C. CALCULATIONS Area (acres) I%imp Frequency Soil Type Length (ft) Slope (ft/ft) Isohyet (iri.) Tc-calculated (min.) Intensity (in./hr) Cu - Cd 26.91 0.10 50 9 1470 0.1803 5 10 2.15 0.7900 0.8000 19.81 0.10 50 9 1400 0.225 5 9 2.26 0.8000 0.8100 6.6 0.10 50 9 850 0.3114 5 6 2.74 0.8600 0.8600 • HYDRAULIC CALCULATIONS • B & E. ENGINEERS JOB NO Jr.4 20cc744-9r)ATE o7! t Iw 24 W. St. Joseph Street (626) 446-4449 PROJECT AfP&Loo$.s' Rat-Li"-3 Htus Arcadia, California 91007 FAX (626) 446-6566 ENG'R CHECK BY (71-4 TW : .11 P 69.5/1 INV/867.57 • A.C. BERM 73.57 TC 673.78 42 SHT OF B& E; ENGINEERS... 24 W. St. Joseph Street Arcadia, California 91007 Sic a5D (626) 446-4449 FAX (626) 446-6566 JOB NO PROJECT ENG'R .�W (2.00d416) . An'4.60 ! . .40$oGF t Ps aK• 24I PoPa. F'tf L IHE i yr„-i , ("M t01 0 0 0 • DATE Ro hai (!O CHECK BY (2-' ' 870 SHT ' OF i 1 12,4o1440) lacol 1--ti-t 1._____BLYDP-Autt_le ce41,..n.A.LATiect-t "Ti-m•• c-FS Ttie: 1:14A t•-1 Er_-. •ri.m 49F 11-M tr ro-PN4 T t-11),P2-1 -ro Tt-kr- Ter ePF -rt-k- &pal- ts "rt+5 Afrtot-t.OT CP A?Jlo oter.prri. T IS Asi,.) it et fzer46-41 THAT otitsp...ri..p v-tvue..D C-441- 11— AT 11-17-- 114171,. 74%-stx--; c-A-4„;c-tAt-Allodos t tMVS" MUM Pe;10ot,TThte-rNLT 50 16s of"6") A-0:46s TH--B- "'PP Oft V4A4,-1.- F Ttis otz-f-r T 41t0+6.'2•6r--stoi`• E:t-( A-40 cm,..cut.-A110A.3srr Peltio.z 40 .0 v,101..4 Py2-01,tc-i- ,4 MAxi MUM Hi-MOVJA-TsI . Ti--r-cv--s iG?z VAT sPtt-Lo(iatz. --roTh z'N,ne.:1". 15 -11, - r• 611 c-F5 • PFADING IJE NO 1 IS - }FADING LINE ND 2 IS - NEADING LINE NO 3' IS - F0515P WATER SUREICE PROFILE -TTnE, CARD LISTIlZ SIII M DPAIN ROADIES LINE "1" 2 APPAICCSA IN FOILING HTTTR EN In1.INP B& E EMINIERS MERE BY B.R. 06/29/10 PPG NO 3 ATE: 7/ 6/2010 TflE: 10:31 F0515P WPTER SURE PROFILE - C1 I L =ICH LISPING CARD SECT CAI NO OF AVE PIER 1EIGHP 1 EASE ZL ZR INV Y(1) Y(2) Y(3) Y(4) Y(5) Y(6) Y(7) Y(8) Y(9) Y(10) OCCE • NO •TYPE PIERS • WIDrH - DINIE7 TrT UTH ." DROP CD 1 4 2.00 F 0 5 1 5 P ATIR SOME PPOFTIE - ELE= CPBD USING ELEVINf NO 1 IS A SYSTEM dna * * ' * U/S DATA STATION INVERT SETT - 0.00 855.32 - • 1 • ELEMENT NO 2 IS ARACE . *. * U/S DATA STATION INVEitf SEI:f 75.00 867.37 1 aaD1T NO 3 IS A SYSTEM HIMIEB iS U/S !YYlA STATION' , INVERT . SECT 75.00 867.37 1 NO EOTr MPS CN IS KW =TING ** WRUNG NO. 2 ** - HATER SUREPLE EEEVAATICN GIVEN IS IESS TIPN CR DxP.IS INUET{r ELEVATION.IN HLWLS, W.S.EIIVV = INV + CC PPt£ NO 2 W S ELE1 0.00 N RADIUS ANGLE AN G PT AN H 0.013 . 0.00 0.00 0.00 0 W S ELEV 0.00 LICENSEE: B & E E1 EFS F0515P WITERSUREACEPPORIELLSTLNG SIC 4 DRAM BYI?PDLICS LINE "1" 2 APPALOOSA IN RCLIM MIS EN 1nl.INP B & E ENGINEERS EYTEPED BY B.R. 06/29/10 STATICN INVERT W.S. E[£V OF FICW E[LV I✓E1E1N S0 PPG Q VET, VEL ENERGY 511±A CRITICAL EST/ PASE/ ZL NO AVBPR HEAD ORD.EE. 111,V DERIIll DIA ID NO. PIER SF AVE HF NORM DEP1H . ZR 0.00 855.32 1.017 856.337 40.0 24.94 9.657 865.994 0.00 1.952 2.00 0.00 0.00 0 0.00 16.41 0.16067 .111434 1.83 0.930 0.00 16.41 857.96 1.054 859.010 40.0 23.81 8.803 867.813 0.00 1.952 2.00 0.00 ,0.00 . 0 0.00 12.20 0.16067 .098426 1.20 0.930 0.00 28.61 859.92 1.095 861.011 40.0 22.70 8.002 869.013 0.00 1.952 2.00 0.00 0.00 0 0.00 9.27 0.16067 .086850 0.81 0.930 0.00 37.88 861.41 1.138 862.544 40.0 21.65 7.275 869.819 0.00 1.952 2.00 0.00 0.00 0 0.00 ' 7.33 0.16067 .076733 0.56 0.930 0.00 45.21 862.58 1.184 863.768 40.0 20.64 6.615 870.383 0.00 1.952 2.00 0.00 0.00 0 0.00 • 5.96 0.16067 .067906 0.40 0.930 0.00 51.17 863.54 1.233 864.774 40.0 19.68 6.011. 870.785 0.00 1.952 2.00 0.00 0.00 0 0.00 4.93 0.16067 .060173 0.30 0.930 0.00 56.10 864.33 1.284 865.617 40.0 18.76 5.466 871.083 0.00 1.952 2.00 0.00 0.00 0 0.00 4.12 0.16067 .053407 0.22 0.930 0.00 ' 60.22 865.00 1.339 866.335 40.0 17.89 4.969 871.304 0.00 1.952 2.00 0.00 0.00 0 0.00 3.48 0.16067 .047505 0.17 0.930 0.00 63.70 865.55 1.397 866.952 40.0 17.06 4.518 871.470 0.00 1.952 2.00 0.00 0.00 0 0.00 2.93 0.16067 .042381 0.12 0.930 0.00 66.63 866.03 1.461 867.487 40.0 16.26 4.105 871.592 0.00 1.952 2.00 0.00 0.00 0 0.00 2.48 0.16067 .037960 0.09 0.930 0.00 69.11 866.42 1.530 867.954 40.0 15.50 3.732 871.686 0.00 1.952 • 2.00 0.00 0.00 0 0.00 2.08 0.16067 .034178 0.07 0.930 0.00 41 LICENSEE: B & E ENGBNEFRS F0515P WATER RUM PROFILE IJSTD1G SIUI DRAIN HYIRAGLICS, LINE "1" 2 APPAIIITA IN POLLING HIIIS EN lnl.INP B & E ENGINEERS EKED BY B.R. 06/29/10 .INVERT DEPTH W.S. .- Q VEL E1 OF FILW ELEV VEy EDGY SUFt. CRITICAL' HII�D CRD.EL EIkV DERDI NEE - 2 ELT/ EASE/ ZL ND AVBPR DIA ' ID N3. PER L/ELEN SO SF AVE HE NCPM DE9TH . . ZR 71.19 866.76 1.607 868.364 40.0 14.79 3.395 871.759 0.00 1.952 2.00 0.00 0.00 0 0.00 1.71 0.16067 .031024 0.05 0.930 0.00 72.90 867.03 1.694 868.726 .40.0 14.09 3.085 871.811 0.00 1.952 2.00 0.00 •0.00 0 0.00 1.33 0.16067. .028571 0.04 0.930 . 0.00 74.23 867.25 1.798 869.045 40.0 13.44 2.805 871.850 0.00 1.952 2.00 0.00 0.00 0 0.00 0.77 0.16067 .027661 0.02 75.00 867.37 1.952 869.322 40.0 12.81 2.549 871.871 0.00 1.952 ' *d zs 2,64S ll34, ttrl(as_') 1-1141. DG J; V -lit Clg�-3.ao 6�,v l ` CS11.►13 - Sfc'i'1) 5Ir,► 14v.t, "fr- 0.930 2.00 0.00 0.00 0 0.00 i.° si2-S" DrPTR-AteLie TY4 i)oNbi146 B.&E ENGINEERS 24 W. St. Joseph Street Arcadia, California 91007 (626) 446-4449 FAX (626) 446-6566 JOB NO. PROJECT ENG'R Q5'0=15.41ciS %c 'Z3, GCP FP S - • Gt2ct;it-4o \.� ......~` ,) u 2oo1 HATE 'M1'11 ro CHECK BY o2Sio \ \ (0 Vr max. "t l4DPS 2 SCALE: 1412P42, fur 2� 0 0 t 0 to G SHT OF 2 HEADING LINE NO 1 IS - FIEADE% LINE NO 2 IS - }EADING LINE NO 3 IS F0515P ma SORF7a PROFILE - TTIIE on LLSTIl% SHUN HYDRAULICS LINE "2" 2 =OSA IN RfILL NG. HMS FN 1112.1111, B S E FNGI S DUPED BY B.R. 07/01/10 PAGE NG 3 DATE: 7/ 1/2010 TflE: 8:25 F0515P Y R SURFT E FFCFIIE - OPIaIEL DE'rINITI(N MsrI G PACE 1 CARD SFIT Cal NO OF AVE PIER FEIQHr 1 EASE ZL ZR INV Y(1) Y(2) Y(3) Y(4) Y(5) Y(6) Y(7) Y(8) Y(9) Y(10) • CCCE NO TYPE PIERS. NIDIIi , DIFIffii . AIDIIi . EROP .... . . ® 1 4 2.00 F0515P WATER SURF-aE FROETIE - ELEI NT•CPPD LLSTING ELEMENT NO 1 IS A SYSTEM CUTLET . U/S DATA ' STATION INVER SECT 0.00..855.34 ....1.._ .. WSELEU 0.00 PPG ND 2 • EIDER NO ' 2 IS A REIM 0/S D STATION INVERC SETT N RADIUS PNQE PNG PT INN H 58.00 869.90 1 0.013 0.00 . 0.00 0.00 0 E iENT NO 3 IS A SYSTEMHE6r 5, U/S STATffiQ '..INVffd' sEcr 58.00 869.90 1 NO EDIT ERFDPS Fi CN IS NOW EIDGIIV ZING ** WPPN11G D. 2 ** - WITE1 SURFACE ELEZTION GIVEN IS LESS DEN CR EIS UM' E[EVATTCN IN EMS, W:S.EIEU = INV + DC • WSELEV 0.00 LICRISSEE: B & E ENGMERS E0515P PPE 1 MIER SUM PFDEII£ LIM% SICDRAIN}mums LINE "2" 2 APPALCCSA IN ULM EIIIIS EN 1n2.INP B fi E REIMS ENIE ED BY B.R. 07/01/10 STATIC 1 INVERT . TEEIH ...W.S. Q _ ..VEL VEL ENERGY . SUPER CRITICAL i r/ WSE/ ZL ND AVER REV V . OF EICW REV BEAD CAD. E L. EI&T DEPIN DIA ID N0. PIER ' L/ELFM S0 SF AVE HE Nam! DEPTH ZR 0.00 855.34 0.521 855.861... 15.4 23.66 8.689 '8E4.550 0.00 1.415' ' 2.00 0.00 0.00 0 0.00 2.23 0.25103 .207525 0.46 0.500 0.00 0 2.23 855.90 0.523 856.423 15.4 23.48 8.558 864.981 0.00 1.415 2.00 0.00 0.00 0 0.00 12.96 0.25103 ' .192359 2.49 0.500 0.00 15.19 859.15 0.541 .859.695 15.4 ' 22.38 7.780 867.475 0.00 '1.415 ' 2.00 ' 0.00 0.00 0 0.00 8.33 0.25103 ............:....._ .. _ .... .168318 ......1.40 .... 0.500 ..: O 00 23.52 861.24 0.560 861.804 15.4 21.36 7.084 868.888 0.00 1.415 2.00 0.00 0.00 0 0.00 6.01 0.25103 .147369 0.89 0.500 0.00 29.53 862.75 0.580. 863.333 15.4 20.34 6.426 869.759 0.00 1.415 2.00 0.00 0.00 0 0.00 4.63 0.25103 .129018 0.60 0.500 0.00 34.16 863.91 0.600 864.515 15.4 19.40 5.841 870.356 0.00. 1.415 . 2.00 0.00 0.00 0 0.00 3.70 0.25103 .112934 0.42 0.500 0.00 37.86 864,84 0.621 • 865.465 , 15.4 18.51 5.320 870.785 0.00 1.415 2.00 0.00 0.00 0 0.00 3.03 0.25103 .098902 0.30 0.500 0.00 40.89 865.61 0.643 866.248 15.4 17.64 4.832 871.080 0.00 1.415 2.00 0,00 0.00 0 0.00 2.53 0.25103 .086650 0.22 0.500 0.00 43.42 866.24 0.666 866.907 15.4 16.83 4.399 871.306 0.00 1.415 2.00 0.00 0.00 0 0.00 2.15 0.25103 .075907 0.16 0.500 0.00 45.57 866.78 0.689 867.469 15.4 16.04 3.996 871.465 0.00 1.415 2.00 0.00 0.00 0 0.00 1.84 0.25103 .066515 0.12 0.500 0.00 47.41 867.24 0.714 867.955 15.4 15.29 3.632 871.587 0.00 1.415 2.00 0.00 0.00 0 0.00 1.58 0.25103 .058310 0.09 0.500 0.00 1 LICENSEE: B & E ENGINEERS F0515P RATEEi SURFS PROFILE LISTDE siorm mAZ l HYDRADLICS LINE "2" 2 APPAIMSA IN FOLLNG BILIS FN 1n2.INP B & E ENGINEERS EN1FRED BY B.R. 07/01/10 PPE 2 STATION INVERT DEPTH W.S. Q VEL VEL MEWL SOPER CRITICAL MT/ EASE/ FL NO AVBFR ELEV OF FLOW EEE,V BUD GD,EL. EELV DEPTH DM ID D. PIER L/E[EA SO SF AVE HE NC FM IEPffi ZR 48.99 867.64 0.739 868.377 15.4 14.58 3.302 871.679 0.00 1.415 2.00 0.00 0.00 '0 0.00 1.37 0.25103 .051128 0.07 0.500 0.00 ' 50.36 867.98 0.766 868.747 15.4 13.90 3.000 871.747 0.00 1.415 2.00 0.00 0.00 0 0.00 1.18 0.25103 .044868 0.05 0.500 • 0.00 51.54 868.28 0.794 869.073 15.4 13.25 ' 2.727 871.800 0.00 1.415 2.00 0.00 0:00 0 0.00 1.04 0.25103 ` .039365 0.04 0.500 0.00....... 52.58 868.54 0.822 869.362 15.4 12.64 2.482 871.844 0.00 1.415 2.00 0.00 0.00 0 0.00 0.90 0.25103 .034558 0.03 0.500 0.00 53.48 868.77 0.853 869.619 15.4 12.05 2.255 871.874 0.00 1.415 2.00 0.00 0.00 0 0.00 0.79 0.25103 .030363 0.02 0.500 0.00 54.27 868.96 0.884 869.847 15.4 11.49 2.051 871.898 0.00 1.415 2.00 0.00 0.00 0 • 0.00 0.68 0.25103 .026678 0.02 0.500 0.00 54.95 869.13 • 0.917 870.052 15.4 10.95 1.863 871.915 0.00 1.415 2.00 0.00 0.00 .0 0.00 0.60 0.25103 .023456 0.01 0.500 0.00 55.55 869.28 0.951 870.235 15.4 10.45 1.695 871.930 0.00 1.415 2.00 0.00 0.00 0 0.00 0.51 0.25103 .020633 0.01 0.500 0.00 56.06 869.41 0.987 870.400 15.4 9.96 1.541 871.941 0.00 1.415 2.00 0.00 0.00 0 0.00 0.44 0.25103 .018168 0.01 0.500 0.00 56.50 869.52 1.025 870.548 15.4 9.49 1.400 871.948 0.00 1.415 ' 2.00 0.00 0.00 0 0.00 0.37 0.25103 .016013 0.01 0.500 0.00 56.87 869.62 1.065 870.681 15.4 9.05 1.273 871.954 0.00 1.415 2.00 0.00 0.00 0 0.00 0.31 0.25103 .014120 0.00 0.500 0.00 LICENSEE: B S E F1VGII�5 F0515P PAGE 3 MIER SORFFGE PROFILE LISTDIG ME £W*.IN HYDRADIICS LINE "2" 2 APPAIDOSA IN FOLLIN HIIIS IN 1r2.Il'IP B & E ENGINEERS ENTERED BY B.R. 07/01/10 ' STATI(N INVEID:. DEPTH W.S. Q VEL VEL ENERGY buitlt CRITICAL ELT/ BASE/ -a NO AVBPR E1EV OF STOW ELEV PFPD GFD.EL. ELFU DEPIR ' DIA ID NO. PIER 'L/E[24 SO SF AVE HF NCEM DEPIi ER 57.18 869.70 1.106 870.801 15.4 8.63 1.157 871.958 0.00 1.415 2.00 0.00 0.00 0 0.00 0.26 0.25103 • .012462 0.00 0.500 ' 0.00 57.44 869.76 1.150 870.910 15.4 8.23 1.052 871.962 0.00 1.415 2.00 0.00 0.00 0 0.00 0.20 0.25103 .011017 0.00 0.500 0.00 ' 57.64 869.81 1.197 871.008 15.4 7.85 0.957 871.965 0.00 1.415 2.00 0.00 0.00 0 0.00 0.16 0.25103... .009752 0.00 0.500............. .. 0.000.. 57.80 869.85 1.246 871.096 15.4 7.48 0.869 '871.965 0.00 1.415 2.00 0.00 0.00 0 0.00 0.11 0.25103 .008643 0.00 0.500 0.00 57.91 869.88 1.298 871.176 15.4 7.13 0.790 871.966 0.00 1.415 2.00 0.00 0.00 0 0.00 0.07 0.25103 .007676 0.00 0.500 0.00 ' 57.98 869.89 1.354 871.248 15.4 6.80 0.718 871.966 0.00 1.415 2.00 0.00 0.00 0 0.00' 0.02 0.25103 .006828 0.00 0.500 0.00 58.00 869.90 1.415 871.315 15.4 6.48 0.652 871.967 0.00 1.415 2.00 0.00 0.00 0 0.00 VW If r ./ cc.= I,G9. r. A, Ce.,2..I HfI .ram., la I4W • ROCK RIP -RAP APRON DESIGN • • JN 0-a17l4 -g o2 to l a$I ►a C 4 A Stc i4 Q► (sv) _ cFS coN \h%'.`S 1 e91•-4 5 0R t1 t,( t--44 4. ;1 cA -- r-itA s l - 0E- P-oe-}‹. Fkl P- i P A 4-11V2-. cp/ 9e.„ sfz- 4/ ,12- t A v. S I. ,14 26(14 C1�S$ tArsTr2. r t w IDT I 3 = 3��-=Cn ► Cam) -1-C 14)Sn 1 1 D') P LP6i CF. as ' 1P -r STan-vrt qv ± 15 = 55 C—A-l— -rr4-3 V T Do W: )..) 6 T 4— 7 V = Co , TES Cohn P147511, *)-1 Use iotibo3-S-�---.�T�a �%'l' t N1 110 e-fc- & II Di A ► C ' G�Ti RI P im T -1444. -6 2_01) 11 • • VELOCITY @ DS END OF APRON Worksheet for Irregular Channel Project Description Project File p:lautocad projectslby job number12007449 appaloosa In -rolling hillsldrainage.fm2 Worksheet NATURAL DRAINAGE COURSE Flow Element Irregular Channel Method Manning's Formula Solve For Water Elevation Input Data Channel Slope 0.130000 ft/ft EleVation range: 849.50 ft to 860.00 ft. Station (ft) Elevation (ft) 0.00 860.00 7.00 16.00 20.00 30.00 48.00 50.00 60.00 68.00 Discharge Results Wtd. Mannings Coefficient Water Surface Elevation Flow Area Wetted Perimeter Top Width Height Critical Depth Critical Slope Velocity Velocity Head Specific Energy Froude Number Flow is supercritical. 855.00 851.00 850.00 849.50 849.50 850.00 855.00 860.00 55.00 cfs 0.040 849.89 8.77 27.35 27.29 ft ft2 ft ft 0.39 ft 850.07 ft 0.030194 ft/ft 6.27 ft/s 0.61 ft 850.50 ft 1.95 Start Station 0.00 End Station 68.00 Roughness 0.040 1,13/10 FlowMaster v5.15 10:19:32 AM Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 (203) 755-1668 Page 1 of 1 Project Description Project File Worksheet Flow Element Method Solve For Cross Section @ DS End of Apron Cross Section for Irregular Channel p:\autocad projects\by job number\2007449 appaloosa In -rolling hills\drainage.fm2 NATURAL DRAINAGE COURSE Irregular Channel Manning's Formula Water Elevation Section Data Wtd. Mannings Coefficient Channel Slope Water Surface Elevation Discharge 860.03 858.0 856.0 854.0 0 0 w 852.0 850.0 848.0 0.0 10/13/10 10:30:17 AM 10.0 0.040 0.130000 ft/ft 849.89 ft 55.00 cfs 20.0 30.0 40.0 Station (ft) 50.0 60.0 70.0 FlowMaster v5.15 Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 (203) 755-1666 Page 1 of 1 L6a . Da • 50 - 40 Aa 20 /0 •� 0 ;; 0 /0 20 0 40 Ls = Aprch /Pr;gt/i D, = Diori7eter or wid / r • of orm' drain • RIP -RAP APRON LENGTH a FIGURE /0. 3.l • . . - a • • . . . • ---- -"--,-- :1.7-7: i . • ..%: .•.. . • •15:::: .•:•2,5•:*. 25 . 30. ' • •4a 50 ; £0 700 S0100 :• ISO ... 2C0. - 250 .• - • 1 • - i • -". - • . 1- - ----PRC9-1.-T--OF-GAPITAL-F-LOD.D PA.' Q. (P.) I, . . : ---.'.. .-"-. 1 . .... - ... . . ;• .. • .. _ .. , . 4.. - - : ..... . . __ • 1. •- . 1 • '." 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THE LARGEST DIMENSION SHALL NOT EXCEED 4 TIMES THE SMALLEST DIMENSION. • 2. THERE SHALL BE A GROUT BED OF AT LEAST 2 INCHES BENEATH THE FIRST LAYER OF ROCK. ALL THE VOIDS • BETWEEN THE ROCKS SHALL BE FILLED WITH GROUT. MAXIMUM SPACING BETWEEN ROCKS SHALL BE 2 INCHES. 3.. SURFACE ROCKS SHALL BE IMBEDDED FROM 1/2 TO 2/3 OF THEIR MAXIMUM DIMENSION NOTE: CONCRETE MAY BE SUBSTITUTED FOR THE GROUT. • EARTHWORKS CALCULATIONS • • 1O'EA COMMU 25' EAS COMMUNI • a co o0' Eg N V Vk„,4, U M 46 IlAWAS E A 111 1.4141tNlita "ft SOCIATION TO R.H. 111101011 " Or.44TVim BRUSH •,,.. r ,..-,-, ,: r` - ; ,-.. . -.." . • ( •-• - _ -1-- 828.5 _L DENSF VEGETATION J.N. "00 NO. CALC.BY LANIM CONTOUR.. 'READING • 0.4r7 • 1,6a AP. -A 6166 A PI Ec- TR.N6.t App4 s" .k) • DATE oJii SCALE 117- 4-c) PLAN AT t • VERAGE WIC :AM INTERVAL: VOLUME .ctir - FILL' 1 ' ) i ' 7. siF i ' i I "1 4\ 41. MAP INSERT SCALE: 1 "=500' RUNOFF TABULATION SUBAREA/ SUBAREA SUBAREA JUNCTION Q50B NO. (ACRE) (CFS) 1A 26.9 46.82 2A I 19.8 36.43 38 I 6.6 I 15.41 TOTAL AREA (ACRE) 26.9 46.7 6.6 TOTAL 0508 (CFS) 46.82 77.40 15.41 y F �5. t� ... 1 Q50B= 77.40 CFS LA=46.7 AC. °, ,\o 0 00cb 951.2 CP CP CP 03 "-O SEE MAP INSERT FOR COMPLETE TRIBUTARY AREAS \\\ DENSF— VEGETATION DENSE VEGETAT ON ROLLING HILLS PROJECT SITE 4 y 4'1Ac RqN o VICINITY MAP NOT TO SCALE LEGEND SUB AREA TIME OF CONCENTRATION (MIN) DRAINAGE SUBAREA S DESIGN "Q " FOR REACH A . DRAINAGE AREA /N ACRES — — ®— SUB AREA BOUNDARY 050B (cfs.) FROM SUBAREA Q50B= BURNED RUNOFF IN CFS FOR 50 YEAR STORM BRUSH DATA. HYDROLOGY MAP 1-H 1.4 d lL NO 009 TUDY FREQUENCY 50 YRS ISOHYET 5" D.P.A 6 FIRE FACTOR 0.8J B EY E ENGINEERS CIVIL ENGINEERING,SURVEYING, & LAND PLANNING 24 W. ST. JOSEPH STREET ARCADIA, CA 91007-2854 TEL(626)446-4449 HYDROLOGY STUDY FOR 2 APPALOOSA LANE LOCATED IN THE CITY OF ROLLING HILLS COUNTY OF LOS ANGELES, STATE OF CALIFORNIA DESIGN: B.R. DRAWN: B.R. DATE: 10-14-10 SCALE: JN 2007449 1 "40' SEIKO FUJIKURO RCE 68530 PLAN SCALE: 1 "=40' SHT. 1 OF 1 SHTS. B & E ENGINEERS CIVIL ENGINEERING SURVEYING LAND PLANNING 24 W. ST. JOSEPH STREET TEL 626-446-4449 ARCADIA, CA 91007 FAX 626-446-6566 TRANSMITTAL To: Ms. Yolanta Schwartz, Planning Director City of Rolling Hills ` t,,,� l [ \-T Address: 2 Portuguese Bend Road Rolling Hills, CA 90274 APR 2 9 2011 From: Seiko Fujikuro City of Rolling Hills Date: April 28, 2011 By Subject: 2 Appaloosa Lane — Fish & Game Application JN: 2007449 Message: Yolanta, Please find enclosed within, a copy of the application package sent to Fish & Game. The grading plan has been revised since the submittal to Fish & Game. However, the only change is the additional note regarding the curb constructed by the Community Association per plan check comment from the County. We do not have the previous version submitted to F&G, and therefore have included the new version for your use. Please let me know if any questions. Sincerely, Seiko Fujikuro, P.E. Project Engineer Date Received Amount Received FOR DEPARTMENT USE ONLY Amount Due I Date Complete Notification No. STATE OF CALIFORNIA DEPARTMENT OF FISH AND GAME NOTIFICATION OF LAKE OR STREAMBED ALTERATION Complete EACH field, unless otherwise indicated, following the enclosed instructions and submit ALL required enclosures. Attach additional pages, If necessary. 1. APPLICANT PROPOSING PROJECT Name Dr. James Black Business/Agency Street Address 22930 Crenshaw Blvd. #D City, State, Zip Torrance, CA 90505 Telephone (310) 749-0882 Email Fax I 2. CONTACT PERSON (Complete only if different from applicant) Name Seiko Fujikuro Street Address B & E Engineers City, State, Zip 24 W. St. Joseph Street Telephone (626) 446-4449 I Fax (626) 446-6566 Email 3. PROPERTY OWNER (Complete only if different from applicant) Name Street Address City, State, Zip Telephone Email 4. PROJECT NAME AND AGREEMENT TERM A. Project Name B. Agreement Term Requested C. Project Term Beginning (year) 2011 Fax I #2 Appaloosa Lane Rolling Hills, CA IE Regular (5years or less) ❑ Long-term (greater than 5 years) D. Seasonal Work Period Ending (year) Start Date (month/day) End Date (month/day) 2011 05/15 07/15 E. Number of Work Days 60.00 FG2023 Page 1 of 9 Rev. 7/06 NOTIFICATION OF LAKE OR STREAMBED ALTERATION 5. AGREEMENT TYPE Check the applicable box. If box B, C, D, or E is checked, complete the specified attachment. A. ® Standard (Most construction projects, excluding the categories listed below) B. ❑Gravel/Sand/Rock Extraction (Attachment A) Mine /.D. Number. C. ❑ Timber Harvesting (Attachment 8) THP Number: D. ['Water Diversion/Extraction/Impoundment (Attachment C) SWRCB Number: E. 0 Routine Maintenance (Attachment D) F. ❑ DFG Fisheries Restoration Grant Program (FRGP) FRGP Contract Number: G. ❑ Master H. ❑ Master Timber Harvesting 6. FEES Please see the current fee schedule to determine the appropriate notification fee. Itemize each project's estimated cost and corresponding fee. Note: The Department may not process this notification until the correct fee has been received. 1 2 3 4 5 A. Project repair and maintain bank, add rip -rap stabilization and culvert B. Project Cost C. Project Fee $10,000.00 $280.25 D. Base Fee (if applicable) E. TOTAL FEE ENCLOSED $280.25 7. PRIOR NOTIFICATION OR ORDER A Has a notification previously been submitted to, or a Lake or Streambed Alteration Agreement previously been issued by, the Department for the project described in this notification? DYes (Provide the information below) ®No Applicant: Notification Number: Date: B. Is this notification being submitted in response to an order, notice, or other directive Corder') by a court or administrative agency (including the Department)? ❑ No ❑ Yes (Enclose a copy of the order, notice, or other directive. If the directive is not in writing, identify the person who directed the applicant to submit this notification and the agency he or she represents, and describe the circumstances relating to the order.) ['Continued on additional page(s) FG2023 Page 2 of 9 Rev. 7/06 • NOTIFICATION OF LAKE OR STREAMBED ALTERATION 8. PROJECT LOCATION A. Address or description of project location. (Include a map that marks the location of the project with a reference to the nearest city or town, and provide driving directions from a major road or highway) #2 Appaloosa Lane, Rolling Hills, CA ❑ Continued on additional page(s) B. River, stream, or lake affected by the project. Blue line stream C. What water body is the river, stream, or lake tributary to? I Storm drain system to Pacific Ocean D. Is the river or stream segment affected by the project listed in the state or federal Wild and Scenic Rivers Acts? ❑Yes ® No ❑ Unknown E. County Los Angeles County F. USGS 7.5 Minute Quad Map Name G. Township H. Range I. Section J.'/. Section Torrance T5S R14W Rancho K. Meridian (check one) IL. Assessor's Parcel Number(s) 7569-010-011 ❑Humboldt El Mt. Diablo f]San Bernardino ['Continued on additional page(s) ❑ Continued on additional page(s) M. Coordinates (If available, provide at least latitudeilongitude or UTM coordinates and check appropriate boxes) Latitude: 33 45'49"N Longitude: 118 21'13' W Latitude/Longitude ® Degrees/Minutes/Seconds ❑ Decimal Degrees ['Decimal Minutes UTM Easting: Northing: ['Zone 10 ['Zone 11 Datum used for Latitude/Longitude or UTM ❑ NAD 27 ® NAD 83 or WGS 84 FG2023 Page 3 of 9 Rev. 7/06 NOTIFICATION OF LAKE OR STREAMBED ALTERATION 9. PROJECT CATEGORY AND WORK TYPE (Check each box that applies) PROJECT CATEGORY Bank stabilization — bioengineering/recontouring Bank stabilization — rip-rap/retaining wallgabion Boat dock/pier Boat ramp Bridge Channel clearing/vegetation management Culvert Debris basin Dam Diversion structure — weir or pump intake Filling of wetland, river, stream, or lake Geotechnical survey Habitat enhancement — revegetation/mitigation Levee Low water crossing Road/trail Sediment removal — pond, stream, or marina Storm drain outfall structure Temporary stream crossing Utility crossing : Horizontal Directional Drilling Jack/bore Open trench Other (specify): NEW CONSTRUCTION Vj tiq .❑ 0 0 REPLACE EXISTING STRUCTURE REPAIR/MAINTAIN EXISTING STRUCTURE ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ 0 ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ 0 FG2023 Page 4 of 9 Rev. 7/06 • NOTIFICATION OF LAKE OR STREAMBED ALTERATION 10. PROJECT DESCRIPTION A. Describe the project in detail. Photographs of the project location and immediate surrounding area should be included. - Include any structures (e.g., rip -rap, culverts, or channel clearing) that will be placed, built, or completed in or near the stream, river, or lake. - Specify the type and volume of materials that will be used. - If water will be diverted or drafted, specify the purpose or use. Enclose diagrams, drawings, plans, and/or maps that provide all of the following: site specific construction details; the dimensions of each structure and/or extent of each activity in the bed, channel, bank or floodplain; an overview of the entire project area (i.e., "bird's-eye view") showing the location of each structure and/or activity, significant area features, and where the equipment/machinery will enter and exit the project area. The recent drainage and grading improvement to the property was initiated by erosion that occurred during the storm season in 2009. The property owner has imported a little less than 500 cubic yard of fill material in order to grade the eroded area to mitigate the erosion and added drainage improvements to minimize future damages due to stormwater. The total area of disturbance from this grading and drainage improvements is 19,300 square feet We have enclosed a copy of the grading plan that is being reviewed by County of Los Angeles Building and Safety which shows the location of the new pipes, rip -rap and the location where the grades were smoothed out as required by the City. B. Specify the equipment and machinery that will be used to complete the project. Most of the work will be preformed by bobcat and hand tools. C. Will water be present during the proposed work period (specified in box 4.D) in the stream, river, or lake (specified in box 8.B). ❑ Continued on additional page(s) 0 Continued on additional page(s) ❑ Yes © No (Skip to box 11) D. Will the proposed project require work in the wetted portion ❑Yes (Enclose a plan to divert water around work site) of the channel? No FG2023 Page 5 of 9 Rev. 7/06 • NOTIFICATION OF LAKE OR STREAMBED ALTERATION 11. PROJECT IMPACTS A. Describe impacts to the bed, channel, and bank of the river, stream, or lake, and the associated riparian habitat. Specify the dimensions of the modifications in length (linear feet) and area (square feet or acres) and the type and volume of material (cubic yards) that will be moved, displaced, or otherwise disturbed, if applicable. The property owner has imported a little less than 500 cubic yard of fill material in order to grade the eroded area to mitigate the erosion and added drainage improvements to minimize future damages due to stormwater. The total area of disturbance from this grading and drainage improvements is 19,300 square feet. The total area of rip -rap is 936 sq. ft. B. Will the project affect any vegetation? 0 Yes (Complete the tables below) ® No Vegetation Type Tree Species ❑ Continued on additional page(s) Temporary Impact Permanent Impact Linear feet Linear feet: Total area: Total area: Linear feet Linear feet Total area: Total area: Number of Trees to be Removed I Trunk Diameter (range) ❑ Continued on additional page(s) C. Are any special status animal or plant species, or habitat that could support such species, known to be present on or near the project site? ['Yes (List each species and/or describe the habitat below) ❑ No ® Unknown ❑ Continued on additional page(s) D. Identify the source(s) of information that supports a "yes" or 'no' answer above in Box 11.C. ❑Continued on additional page(s) E. Has a biological study been completed for the project site? ❑ Yes (Enclose the biological study) 17INo Note: A biological assessment or study may be required to evaluate potential project impacts on biological resources. F. Has a hydrological study been completed for the project or project site? El Yes (Enclose the hydrological study) ❑ No Note: A hydrological study or other information on site hydraulics (e.g., flows, channel characteristics, and/or flood recurrence intervals) may be required to evaluate potential project impacts on hydrology. FG2023 Page 6 of 9 Rev. 7/06 • NOTIFICATION OF LAKE OR STREAMBED ALTERATION 12. MEASURES TO PROTECT FISH, WILDIFE, AND PLANT RESOURCES A. Describe the techniques that will be used to prevent sediment from entering watercourses during and after construction. Typical erosion and sediment control measures such as perimeter sandbags, check dams and tracking controls will be used during construction. After construction, affected slopes and exposed dirt will be immediately vegetated. ❑Continued on additional page(s) B. Describe project avoidance and/or minimization measures to protect fish, wildlife, and plant resources. The affected area in within a blue line stream that is not wet most of the year. No visible signs of fish or wildlife, protected or otherwise. There is no avoidance or minimization measures proposed at this time. ❑ Continued on additional page(s) C. Describe any project mitigation and/or compensation measures to protect fish, wildlife, and plant resources. No mitigation and/or compensation measures are planned at this time. ❑ Continued on additional page(s) 13. PERMITS List any local, state, and federal permits required for the project and check the corresponding box(es). Enclose a copy of each permit that has been issued. A. Los Angeles County DPW -local I Applied ❑ Issued B. ❑Applied 0 Issued C. ❑ Applied ❑ Issued D. Unknown whether ['local, ❑ state, or ❑ federal permit is needed for the project. (Check each box that applies) ['Continued on additional page(s) FG2023 Page 7 of 9 Rev. 7/06 • NOTIFICATION OF LAKE OR STREAMBED ALTERATION 14. ENVIRONMENTAL REVIEW A Has a draft or final document been prepared for the project pursuant to the California Environmental Quality Act (CEQA), National Environmental Protection Act (NEPA), California Endangered Species Act (CESA) and/or federal Endangered Species Act (ESA)? ❑ Yes (Check the box for each CEQA, NEPA, CESA, and ESA document that has been prepared and enclose a copy of each) No (Check the box for each CEQA, NEPA, CESA, and ESA document listed below that will be or is being prepared) ❑ Notice of Exemption ❑ Mitigated Negative Declaration El NEPA document (type): ▪ Initial Study ❑ Environmental Impact Report ❑ CESA document (type): ❑ Negative Declaration ❑ Notice of Determination (Enclose) ❑ ESA document (type): ❑THP/ NTMP ❑ Mitigation, Monitoring, Reporting Plan B. State Clearinghouse Number (if applicable) C. Has a CEQA lead agency been determined? D. CEQA Lead Agency E. Contact Person ❑Yes (Complete boxes D, E, and F) ❑No (Skip to box 14.G) F. Telephone Number G. If the project described in this notification is part of a larger project or plan, briefly describe that larger project or plan. Project is not part of a larger plan or project. ❑Continued on additional page(s) H. Has an environmental filing fee (Fish and Game Code section 711.4) been paid? ❑ Yes (Enclose proof of payment) ® No (Briefly explain below the reason a filing fee has not been paid) Note: If a filing fee is required, the Department may not finalize a Lake or Streambed Alteration Agreement until the filing fee is paid. 15. SITE INSPECTION Check one box only. ❑ In the event the Department determines that a site inspection is necessary, I hereby authorize a Department representative to enter the property where the project described in this notification will take place at any reasonable time, and hereby certify that I am authorized to grant the Department such entry. ® I request the Department to first contact (insert name) at (insert telephone number) to schedule a date and time to enter the property where the project described in this notification will take place. I understand that this may delay the Department's determination as to whether a Lake or Streambed Alteration Agreement is required and/or the Department's issuance of a draft agreement pursuant to this notification. FG2023 Page 8 of 9 Rev. 7/06 f NOTIFICATION OF LAKE OR STREAMBED ALTERATION 16. DIGITAL FORMAT Is any of the information included as part of the notification available in digital format (i.e., CD, DVD, etc.)? xQYes (Please enclose the information via digital media with the completed notification form) ❑ No 17. SIGNATURE I hereby certify that to the best of my knowledge the information in this notification is true and correct and that I am authorized to sign this notification as, or on behalf of, the applicant. I understand that if any information in this notification is found to be untrue or incorrect, the Department may suspend processing this notification or suspend or revoke any draft or final Lake or Streambed Alteration Agreement issued pursuant to this notification. I understand also that if any information in this notification is found to be untrue or incorrect and the project described in this notification has already begun, I and/or the applicant may be subject to civil or criminal prosecution. I understand that this notification applies only to the project(s) described herein and that 1 and/or the applicant may be subject to civil or criminal prosecution for undertaking any project not described herein unless the Department has been separately notified of that project in accordance with Fish and Game Code section 1602 or 1611. &// L71/ // Signature of Appliianr Applicant's Authorized Representative Date kD R.4 I r `K cr r� � Print Name FG2023 Page 9 of 9 Rev. 7/06 TOP VIEW OF EXISTING INLET PHOTO 1 L,II yam` oIr z EXISTING INLET PHOTO LOCATED ON OPPOSITE SIDE OF APPALOOSA LANE 2 F & G LSA NOTIFICATION NO. 1600-2011-0064—R5 #2 APPALOOSA LANE NEW INLET PHOTO 3 OW - NEW 24 INCH HDPE PIPE LOCATED ON PROJECT SITE 4 R/S CONNECTS TO EXISTING INLET -PHOTO 2 L/S CONNECTS TO NEW INLET PHOTO 3 F & G LSA NOTIFICATION NO. 1600-2011-0064-R5 #2 APPALOOSA LANE tti NEW INLETS LOCATED ON PROJECT SITE 5 F & G LSA NOTIFICATION NO. 1600-2011-0064-R5 #2 APPALOOSA LANE NEW RIP RAP @ BASE OF NEW AND EXISTING OUTLETS 7 RIP RAP AREA TO BE INCREASED PER LACDPW-B & S REQUEST BLUE LINE STREAM AND RIP -RAP 8 F & G LSA NOTIFICATION NO. 1600-2011-0064-R5 #2 APPALOOSA LANE • HYDROLOGY STUDY & HYDRAULIC CALCULATIONS FOR 2 APPALOOSA LANE, ROLLING HILLS, CA. JN 2007449 OCTOBER 14, 2010 B & E ENGINEERS 24 W. ST.JOSEPH STREET, ARCADIA, CA. 91007-2854 TEL. (626) 446-4449 • • 2 Appaloosa Lane, Rolling Hills, California Background In 2009, there was erosion at the subject property, along the east side of Appaloosa Lane, toward the northern portion of the property. The property owner, Dr. Jim Black, consulted with the City of Rolling Hills so he may mitigate the erosion and prevent any further erosions that may cause any damages to his property. The outcome of the consultation with the City was that he may import up to 500 cubic yard of fill material to grade the eroded area for mitigation purposes. As a result, a little less than 500 cubic yard of fill material was imported from a nearby construction site, and was used to fill the eroded slope. Additional grading was done to a limited extent to promote a better drainage through the area. Existing 24" diameter storm drain pipe, that crosses Appaloosa Lane into Dr. Black's property, was extended approximately 22' to a new un-grouted rip rap of approximately 390 square feet. Additional pipe inlet was constructed on the east side of Appaloosa Lane and approximately 58' of new 24" diameter storm drainage pipe was installed to the newly constructed rip rap. Photographs of the current conditions are included on the following pages and the summary of grading work is as follows: • Cut Quantity: 368.1 cubic yard • Fill Quantity: 841.8 cubic yard • Import: 473.7 cubic yard • Total Affected Area: 19,300 square feet Dr. Black was recently contacted by the County of Los Angeles and has found that a grading permit was required for the completed construction work. A permit is also required from the Department of Fish and Games as the grading took place within a blue -line stream. B & E Engineers was hired to obtain required permits and obtain approvals from the City of Rolling Hills and County of Los Angeles and has prepared a grading plan and a hydrology study for this purpose. B & E Engineers was previously hired by Dr. Black in 2007 to perform boundary and topographic survey for the subject property. We recently have done an additional topographic survey to compare the pre- existing condition in 2007, prior to construction, and the current condition. The prepared grading plan depicts the changes in topography and construction of new drainage pipes as discussed above. Additionally, we have prepared hydrology study and hydraulic calculations to determine adequacy of the capacity of the 24" pipes. While it was determined that the pre-existing 24" diameter pipe and the inlet structure will cause spill -over to the street during a 50 year frequency storm, this is a pre-existing condition that was not affected by the recent construction. The newly constructed 24" diameter pipe and its inlet structure have a sufficient capacity to carry 50 year frequency storm runoff. B & E Engineers JN 2007449 • Photographs 1: Rip -Rap at the outlet of 24" diameter storm drain pipes. 2. New inlet to 24" storm drain pipe. B & E Engineers JN 2007449 • • 3. Graded area. 4. Graded area. JN 2007449 B & E Engineers • HYDROLOGY CALCULATIONS • • N 2ooi ir-Ac cra ( s H tc-)n -c' SGTL-0 `I' FeNz- 2 /4' l..ou $ ../.44S. i4 11.1.-y CA 1-1 Fop^ 1A- N runt-aG DATA LSoi L C44, 9S Tr(P OF o ri IF-1.- tf t,,IIi PY2.oroo-i►DN. 1mP .:11-.touS • • • (016) 7.2 IN CUES OF fRAINFALL SOIL CLASSIFICATION AREA (DPA-6)ADREA FOTENTLAL 1-H1.8 SAN PEDRO 1—H1.2 0 7 25-YEAR 24-HOUR ISOHYET REDUCTION FACTOR: 0.878 10-YEAR 24-HOUR ISOHYET REDUCTION FACTOR: 0.714 TORRANCE 50-YEAR 24-HOUR ISOHYET 2 Mlles • Fci A , LONG BEACI yfra.,µ 1 1-H1.4 33'45'00" okO£ES co A!Mk"i PUBLIC WORKS 9 Proportion Impervious Data Code Land Use Description 1111 High -Density Single Family Residential I 1112 Low -Density Single Family Residential 1121 'Mixed Multi -Family Residential 1122 'Duplexes, Triplexes and 2-or 3-Unit Condominiums and Townhouses 1123 1Low-Rise Apartments, Condominiums, and Townhouses 1124 Medium -Rise Apartments and Condominiums 1125 'High -Rise Apartments and Condominiums 1131 'Trailer Parks and Mobile Home Courts, High -Density 1132 (Mobile Home Courts and Subdivisions, Low -Density 1140 Mixed Residential 1151 JRural Residential, High -Density 1152 Rural Residential. Low -Density 1211 Low- and Medium -Rise Major Office Use 1212 High -Rise Major Office Use 1213 Skyscrapers 1221 Regional Shopping Center 1222 Retail Centers (Non -Strip With Contiguous Interconnected Off -Street 1223 Modern Strip Development 1224 Older Strip Development 1231 Commercial Storage 1232 Commercial Recreation 1233 Hotels and Motels 1234 'Attended Pay Public Parking Facilities 1241 Government Offices 1242 Police and Sheriff Stations 1243 Fire Stations 1244 Major Medical Health Care Facilities 1245 Religious Facilities 1246 Other Public Facilities 1247 Non -Attended Public Parking Facilities 1251 Correctional Facilities 1252 Special Care Facilities 1253 Other Special Use Facilities 1261 Pre-Schools/Day Care Centers 1262 Elementary Schools 1263 Junior or Intermediate High Schools 1264 Senior High Schools 1265 Colleges and Universities 1266 'Trade Schools and Professional Training Facilities 1271 Base (Built-up Area) 1271.01 Base High -Density Single Family Residential 1271.02 (Base Duplexes, Triplexes and 2-or 3-Unit Condominiums and T HYDROLOGY APPENDIX D % Impervious 42 21 74 55 86 86 90 91 42 59 15 10 91. 91 91 95 96 96 97 90 90 96 91 91 91 91 74 82 91 91 91 74 86 68 82 82 82 47 91 65 42 55 1 • PLO Lan Package Serial Nu±er: 2099 06/29/10 FILE: RHILIS INPUT DATA: English Units PAINFAIL SOIL FTIE: English (In) OUTRTT DATA: English Units PAGE 1 IDS ANQES CCGNTY'FIOOD (, DISTRICT FROG F0601M NDDIFTED RATICML METHOD HYDROLOGY - STORg YEAR = 50 SOIL DATA FILE: E:\B .TI\2007449\cstsoilx83.dat 2 APPALC SA IPNE IOId ING HILLS CA 06/28/10 BR RORI DAY 4 SUBAMM SUBAREA • TOTAL TOTAL CPI CONY CCNV CCNV CCNV CCNIROL SOL PAW PCP IOCATICN AREA(Ac) Q(CPS) ABEA(Ac) Q(CFS) TYPE Ii\'GGigigi(Et) SLOPE SIZE(Ft) Z Q(CFS) NAME TC ZQ\E LTV 7449 lA 26.9 46.82 26.9 46.82 1 1050. .14762 .00 .00 0. 9 10 A25 .10 7449 2A 19.8 36.43 46.7 77.40 4 75. .12907 2.00 .00 0. 9 9 A25 .10 7449 3B 6.6 15.41 6.6 15.41 4 58. .25103 2.00 .00 0. 9 6 A25 .10 **************************************************************************************************************************** * OWr'II3FN Q'S * * 7449 4A TA 1157 QA 77.28 QAB 85.58 QB 8.30 7449 4B TB 1154 QB 15.41 QBA 84.17 ¢A 68.76 * * 7449 4AB TAB 1156 CAB 87.49 QA 76.77 QB 10.72 **************************************************************************************************************************** SUBAREA. SUBAREA TOTAL TOTAL CCNV CONV OCNV OONV CCNV CONTROL SOIL RAIN Fcr IACATICN AREA(Ac) Q(CFS) AREA(Ac) Q(CFS) TYPE INGr1(Ft) SIAPE SIZE(Ft) Z Q(CFS) NAME TC ZONE 110 7449 4AB 6.6 15.41 53.3 87.49 0 0. .00000 .00 .00 0. 9 0 A25 .00 • T.C. CALCULATIONS Project Subarea Area (acres) %imp Frequency Soil Type Length (ft) Slope (ft/ft) Isohyet (in.) ITc-calculated (min.) Intensity (in./hr) Cu Cd 7449 1A 26.9 0.10 50 9 1470 0.1803 5 10 2.15 0.7900 0.8000 7449 2A 19.8 0.10 50 9 1400 0.225 51 9 2.26 0.8000 0.8100 7449 3B 6.6 0.10 50 9 850 0.3114 51 6 2.74 0.8600 0.8600 • HYDRAULIC CALCULATIONS • • B & E ENGINEERS JOB NO. J1-4 Coo-144-S SATE 01I01119 24 W. St. Joseph Street (626) 446-4449 PROJECT n =fP/''j-O0 tam, (�6t,G1-+cam HILLS Arcadia, California 91007 FAX (626) 446-6566 ENG'R r CHECK BY (` TW : .11 /TP 69.5�1 /NV/867.57 T 8)2 /":5 8j>6 I 1 A.C. BERM � 73.5,7 TC 673.78 3 60.42 1 7V 759 \• 55.32 'BRUSH tt= r t SHT OF • • • B&E ENGINEERS 24 W. St. Joseph Street (626) 446-4449 Arcadia, California 91007 FAX (626) 446-6566 s to S50. JOB NO PROJECT ENG'R J1-►Q oi4 • D ATE Qt:4 i raj t 0 rb r— CHECK BY r`' 40,©G `4,4, ,x =. n2 ,6 FP E, 6rzDur-��i7 5�1� E✓bc • '24"1-1OP Pt fia Q 0 y 0 117 SGO S SHT 2' OF • 11 S TA,e'r 15 4 - 4o 3j � C--F5 . al lato lv • . ,v,F r! � rtun..4T t t1 T -i e' Tt To l ev F _ CR h-7J 1a 13te,.014. t i Is Ad1 Ti cl f 'T';- ► THAT _.. _. o- t t c T. i 4 s5 cA---cvt-ATia S t't" Vs i'' -re M,1%Imt t4 do A AT Tr z (r4ts-T rep ere o� a"' . W TtisTzP OF VIA- -z.. OF M€ . Lt THs. 14 44t /Au r14 w m r- �� Alto +6r F5%( C ,-CUL-A" a4.9S T s TIA�y� c�eo1 /02,1 44 kit t L L s P t -L. a 0ro T I HEADING LINE NO 1 IS - HEADING LINE NO 2 IS - HOMING LINE NO 3 IS - F0515P PACE NO 3 WATER SURFACE PROFILE - TITLE CARD LISTING STOPM DRAY] HYDRAULICS LINE "1" 2 APPALOOSA IN ROLLING HILLS EN Inl.INP B & E EINIGNER9 ENTERED BY B.R. 06/29/10 WE: 7/ 6/2010 TIME: 10:31 F0515P WATER SURFACE PROFILE - CE I DEFINTIICN LISTING ME 1 CARD SECT GN NO OF AVE PIER HEIGHT 1 EASE FL ZR INV Y(1) Y(2) Y(3) Y(4) Y(5) Y(6) Y(7) Y(B) Y(9) Y(10) CODE NO TYPE PIERS WIDTH DIAMETER WIDER DROP CD 1 4 2.00 • • F0515P PACE NO 2 MIER SURFACE PROFILE - EDEMT CARD LISTING EIDENT NO 1 IS A SYSTEM CUM' * * * U/S IlATA STATIC`1 INVERT SECT 0.00 855.32 1 WSEIV 0.00 ETIIII1T N0 2 IS A REACH * * * U/S DATA STATICI ThVEFT SECT N RADIUS ANGLE PANG PT MAN H 75.00 867.37 1 0.013 0.00 0.00 0.00 0 EX,FI,IT NO 3 IS A SYSTEM Iffy KS * * U/S BATA STATICV EWE SECT W S REV 75.00 867.37 1 0.00 NO EDIT ERRCES EI` CQ IS KW BEGINNING ** WAR LNG NO. 2 ** - WATER SURFACE ELEVATION GIVEN IS TFSS ULAN OR E JALS Mar ELEVATION 'IN MKS, W.S.EL V = INV + EC • • • LICENSEE: B & E ENGINEERS F0515P PIS 1 WATER SURF? I PROFILE LISTING SIMI DRAIN HYDRAULICS LINE "1" 2 APPAIDCFA IN TOLLING HIIdS El 1n1.INP B & E ENGINEERS ENTERED BY B.R. 06/29/10 STATI N INVERT DEPTH W.S. Q VEL VEL DERGY SUPER CRITICAL HGT/ BASE/ ZL NO AVBPR ELT OF FLOW ELEV HEAD CRD.a. E[EV DEPTH DIA ID NO. PIER L/ELE4 SO SF AVE HE NORM DF i ZR 0.00 855.32 1.017 856.337 40.0 24.94 9.657 865.994 0.00 1.952 2.00 0.00 0.00 0 0.00 16.41 0.16067 .111434 1.83 0.930 0.00 16.41 857.96 1.054 859.010 40.0 23.81 8.803 867.813 0.00 1.952 2.00 0.00 0.00 0 0.00 12.20 0.16067 .098426 1.20 0.930 0.00 28.61 859.92 1.095 861.011 40.0 22.70 8.002 869.013 0.00 1.952 2.00 0.00 0.00 0 0.00 9.27 0.16067 .086850 0.81 0.930 0.00 37.88 861.41 1.138 862.544 40.0 21.65 7.275 869.819 0.00 1.952 2.00 0.00 0.00 0 0.00 7.33 0.16067 .076733 0.56 0.930 0.00 45.21 862.58 1.184 863.768 40.0 20.64 6.615 670.383 0.00 1.952 2.00 0.00 0.00 0 0.00 5.96 0.16067 .067906 0.40 0.930 0.00 51.17 863.54 1.233 864.774 40.0 19.68 6.011. 870.785 0.00 1.952 2.00 0.00 0.00 0 0.00 4.93 0.16067 .060173 8.30 0.930 0.00 56.10 864.33 1.284 865.617 40.0 18.76 5.466 871.083 0.00 1.952 2.00 0.00 0.00 0 0.00 4.12 0.16067 .053407 0.22 0.930 0.00 60.22 865.00 1.339 866.335 40.0 17.89 4.969 871.304 0.00 1.952 2.00 0.00 0.00 0 0.00 3.48 0.16067 .047505 0.17 0.930 0.00 63.70 865.55 1.397 866.952 40.0 17.06 4.518 871.470 0.00 1.952 2.00 0.00 0.00 0 0.00 2.93 0.16067 .042381 0.12 0.930 0.00 66.63 866.03 1.461 867.487 40.0 16.26 4.105 871.592 0.00 1.952 2.00 0.00 0.00 0 0.00 2.48 0.16067 .037960 0.09 0.930 0.00 69.11 866.42 1.530 867.954 40.0 15.50 3.732 871.686 0.00 1.952 2.00 0.00 0.00 0 0.00 2.08 0.16067 .034178 0.07 0.930 0.00 • LICENSEE: B & E ENGINEERS E0515P PAGE 2 4>Aat SURFS PRGFIIE LISTING MOM GRAIN HYDRAULICS LINE "1" 2 APPALOCSA IN ROLLING RILLS Fit lnl.II�'P B & E ENGINEERS ENTERED BY B.R. 06/29/10 SPATICN INVERT LEMUR W.S. Q VEL VEL EIZRGY SUPER CRTrICAL HGT/ BASE/ EL NO AVBPR ELEV OF FEW ELEV HEAD GRD.EIL. ELEV NTH DIA ID NO. PER L/ELEM SO SF AVE IF N RM DEP E ZR 71.19 866.76 1.607 868.364 40.0 14.79 3.395 871.759 0.00 1.952 2.00 0.00 0.00 0 0.00 1.71 0.16067 .031024 0.05 0.930 0.00 72.90 867.03 1.694 868.726 .40.0 14.09 3.085 871.811 0.00 1.952 2.00 0.00 0.00 0 0.00 1.33 0.16067 .028571 0.04 0.930 0.00 74.23 867.25 1.798 869.045 40.0 13.44 2.805 871.850 0.00 1.952 2.00 0.00 0.00 0 0.00 0.77 0.16067 .027661 0.02 0.930 0.00 75.00 867.37 1.952 869.322 40.0 12.81 2.549 871.871 0.00 1.952 2.00 0.00 0.00 0 0.00 MSS h,c_ 2,645 3.4e4 i- Y4 j- 1^2 li°xr -F- vi.CG AN/ NGI-2 <°a 0,25' Dr:e rg^0E T4 B&E ENGINEERS JOB NO. JN `2C'©1 DATE °lie): 24 W. St. Joseph Street (626) 446-4449 PROJECT 2 /F1V-it.t. f-;r� Pet.J..1e-ICE Arcadia, California 91007 FAX (626) 446-6566 ENG'R � CHECK BY r2-A Qso = 15 .41 GCS 07-1 9)'. 's) 0 1- © p e•X.4Ll i4DP- 1— ►N 2 ►-ot'aa2, Iur 20 Vg2-1. , t°` = 10' SHT 7 OF 2 .� EVADING LINE NO 1 IS - EVADING LINE NO 2 IS - ENDING LINE NO 3 IS - F 0 5 1 5 P PAEE NO 3 WATER SURFACE PROFILE - TITLE CARD LISTING STORM FAIN HYDRAULICS LINE "2" 2 APPAL OSA IN FUILM RIIIIS EN 1n2.INP B & E ENGINEERS ENTERED BY B.R. 07/01/10 • • • DATE: 7/ 1/2010 TIME: 8:25 E0515P WATER SURFP E PIROME - CI-MINEL DEF ITTICN LISPING PAGE 1 CARD SECT CHN NO OF AVE PIER HEIM 1 BASE ZL ZR INV Y(1) Y(2) Y(3) Y(4) Y(5) Y(6) Y(7) Y(8) Y(9) Y(10) • Cam' NO TYPE PIERS WIDTH DIA^ETR WIDTH DROP CD 1 4 2.00 F 0 5 1 5 P PP.1"-c, NO 2 41ATER SURFACE PROFILE - EL 1'T CARD LISPING EtflENT NO 1 IS A SYSTEM CUTLET * * * U/S Da.TA STATION INVERT SILT 0.00 855.34 1 w s ELEV 0.00 ELEMENT NO 2 IS A RFACH * * * U/S DATA SIATICN INVERT SECT N RADIUS ANGLE ANG PT MAN H 58.00 869.90 1 0.013 0.00 0.00 0.00 0 ELEISIT NO 3 IS A SYSTEM HFADGI U/S DATA SIATICN INVERT SECT W S ELEV 58.00 869.90 1 0.00 NO EDIT EREUS ION IS NON BE 1M G ** WARNING N3. 2 ** - WATER SURFACE E[EVATICN GIVEN IS IESS THAN OR ECMIS EVERC E[EVATICN IN HEMS, W.S.ELEV = INV + DC • LICENSEE: B & E ENGINEERS F0515P ME 1 EVER SORF= PROM LISPING SIU4 DRAIN HYDRAULICS LBO "2" 2 APPAIECGA IN POLLING HILLS FN 1n2.INP B & E ENGINEERS ENTERED BY B.R. 07/01/10 SIATIGI INVERT DEPTH W.S. Q VEL VEL ENERGY SUP�Rr CRITICAL HGT/ BASE/ ZL NO AVBPR ETD OF FILE ELEV NE?D GRD.EL. ELEV DEPTH DIA ID NO. PIER L/Et 1 SD SF AVE Hi NORM DEPTH ZR 0.00 855.34 0.521 855.861 15.4 23.66 8.689 864.550 0.00 1.415 • 2.00 0.00 0.00 0 0.00 2.23 0.25103 .207525 0.46 0.500 0.00 2.23 855.90 0.523 856.423 15.4 23.46 8.558 864.981 0.00 1.415 2.00 0.00 0.00 0 0.00 12.96 0.25103 .192359 2.49 0.500 0.00 15.19 859.15 0.541 859.695 15.4 22.38 7.780 867.475 0.00 1.415 2.00 0.00 0.00 0 0.00 8.33 0.25103 .166318 1.40 0.500 0.00 23.52 861.24 0.560 861.804 15.4 21.36 7.084 868.888 0.00 1.415 2.00 0.00 0.00 0 0.00 6.01 0.25103 .147369 0.89 0.500 0.00 29.53 862.75 0.580 863.333 15.4 20.34 6.426 869.759 0.00 1.415 2.00 0.00 0.00 0 0.00 4.63 0.25103 .129018 0.60 0.500 0.00 34.16 863.91 0.600 864.515 15.4 19.40 5.841 870.356 0.00 1.415 . 2.00 0.00 0.00 0 0.00 3.70 0.25103 .112934 0.42 0.500 0.00 37.86 864.84 0.621 • 865.465 15.4 18.51 5.320 870.785 0.00 1.415 2.00 0.00 0.00 0 0.00 3.03 0.25103 .098902 0.30 0.500 0.00 40.89 865.61 0.643 866.248 15.4 17.64 4.832 871.080 0.00 1.415 2.00 0.00 0.00 0 0.00 2.53 0.25103 .086650 0.22 0.500 0.00 43.42 866.24 0.666 866.907 15.4 16.83 4.399 871.306 0.00 1.415 2.00 0.00 0.00 0 0.00 2.15 0.25103 .075907 0.16 0.500 0.00 45.57 866.78 0.689 867.469 15.4 16.04 3.996 871.465 0.00 1.415 2.00 0.00 0.00 0 0.00 1.84 0.25103 .066515 0.12 0.500 0.00 47.41 867.24 0.714 867.955 15.4 15.29 3.632 871.587 0.00 1.415 2.00 0.00 0.00 0 0.00 1.58 0.25103 .058310 0.09 0.500 0.00 • • • LICENSEE: B & E ENGINEERS E0515P PP2 WATER SUREPCE PROFILE LISTING S1tR4 EPAIN HYDRAULICS LINE "2" 2 APPALOOSA IN ROLLING BILIS EN 1n2.INP B & E ENGINEERS ENTERED BY B.R. 07/01/10 STATION INVERT DEER W.S. Q VEL VEL ENERGY SUPER CRITIC1L HGT/ BASE/ ZL ND AVBPR ELEV OF FUW ELEV HEAD GRD.EL. ELL DEPTH DIA ID NO. PIER L/Et 4 SO SF AVE NF NAM DEPTH ZR 48.99 867.64 0.739 868.377 15.4 14.58 3.302 871.679 0.00 1.415 2.00 0.00 0.00 0 0.00 1.37 0.25103 .051128 0.07 0.500 0.00 50.36 867.98 0.766 868.747 15.4 13.90 3.000 871.747 0.00 1.415 2.00 0.00 0.00 0 0.00 1.18 0.25103 .044868 0.05 0.500 0.00 51.54 868.28 0.794 869.073 15.4 13.25 2.727 871.800 0.00 1.415 2.00 0.00 0:00 0 0.00 1.04 0.25103 .039365 0.04 0.500 0.00 52.58 868.54 0.822 869.362 15.4 12.64 2.482 871.844 0.00 1.415 2.00 0.00 0.00 0 0.00 0.90 0.25103 .034558 0.03 0.500 0.00 53.48 868.77 0.853 869.619 15.4 12.05 2.255 871.874 0.00 1.415 2.00 0.00 0.00 0 0.00 0.79 0.25103 .030363 0.02 0.500 0.00 54.27 863.96 0.884 869.847 15.4 11.49 2.051 871.893 0.00 1.415 2.00 0.00 0.00 0 0.00 0.68 0.25103 .026678 0.02 0.500 0.00 54.95 869.13 0.917 870.052 15.4 10.95 1.863 871.915 0.00 1.415 2.00 0.00 0.00 0 0.00 0.60 0.25103 .023456 0.01 0.500 0.00 55.55 869.28 0.951 870.235 15.4 10.45 1.695 871.930 0.00 1.415 2.00 0.00 0.00 0 0.00 • 0.51 0.25103 .020633 0.01 0.500 0.00 56.06 869.41 0.987 870.400 15.4 9.96 1.541 ,871.941 0.00 1.415 2.00 0.00 0.00 0 0.00 0.44 0.25103 .018168 0.01 0.500 0.00 56.50 869.52 1.025 B70.548 15.4 9.49 1.400 871.948 0.00 1.415 ' 2.00 0.00 0.00 0 0.00 0.37 0.25103 .016013 0.01 0.500 0.00 56.87 869.62 1.065 B70.681 15.4 9.05 1.273 871.954 0.00 1.415 2.00 0.00 0.00 0 0.00 0.31 0.25103 .014120 0.00 0.500 0.00 • • LICE,Ii SEE: B & E ENGINEERS F0515P PAGE 3 WATFtt SURFACE PROFIIE LISTING STORM DRAIN HYDRAULICS LINE "2" 2 APPALOOSA IN ROLLING HILLS EN 1n2.INP B & E ENGINEERS ENTERED BY B.R. 07/01/10 STATION INVERT DEPTH W.S. Q VEL' VEL Fief SUPER CRITICAL HGT/ BASE/ ZL NO AVBPR ELEV OF FLOW ELEV HEAD GRD.EL. ELEV DEPTH DIA ID NO. PIER L/ELEM SO SF AVE IF NOPM DEPTH ZR 57.18 869.70 1.106 870.801 15.4 8.63 1.157 871.958 0.00 1.415 2.00 0.00 0.00 0 0.00 0.26 0.25103 .012462 0.00 0.500 0.00 57.44 869.76 1.150 870.910 15.4 8.23 1.052 871.962 0.00 1.415 2.00 0.00 0.00 0 0.00 0.20 0.25103 .011017 0.00 0.500 . 0.00 57.64 869.81 1.197 871.008 15.4 7.85 0.957 871.965 0.00 1.415 2.00 0.00 0.00 0 0.00 0.16 0.25103 .009752 0.00 0.500 0.00 57.80 869.85 1.246 871.096 15.4 7.48 0.869 871.965 0.00 1.415 2.00 0.00 0.00 0 0.00 0.11 0.25103 .008643 0.00 0.500 0.00 57.91 869.88 1.298 871.176 15.4 7.13 0.790 871.966 0.00 1.415 2.00 0.00 0.00 0 0.00 0.07 0.25103 .007676 0.00 0.500 0.00 • 57.98 869.89 1.354 871.248 15.4 6.80 0.718 871.966 0.00 1.415 2.00 0.00 0.00 0 0.00 0.02 0.25103 .006828 0.00 0.500 0.00 58.00 869.90 1.415 871.315 15.4 6.48 0.652 871.967 0.00 1.415 2.00 0.00 0.00 0 0.00 Lc . I, de '2. I h dG At 617,2,. t t t,),1,wc t ^F � r., G�:'L� r c 12 r _' r Hy) ROCK RIP -RAP APRON DESIGN • • • 0-00" 1 -02 10106410 t—c.-r. 1kt P- qj Ju) - S7r}-"-- 15 a 't-' r_0 A.P. P— TT -moo fir, ,,; Cot,) \l :r,s 1 et:44 F©r2-M LA :-& •(� -C- *49C) s Vic— lS- CSD� - - -•r` tom?., = ,4T) CA4--- -t :� ^ram S I Rom= or' P-oeP- fz✓s(a L l ) ) : 'gyp = 9-4-It o (=a = 1,1 >1sry s C(� P :►� 4S 0) rn+ F(- -()-t, r l (tcf, rsitz.Tart. nT}t : 3 p = 3 = -"' toibrr4J, ;Da y16,Cry 2�!Ct) rs • P-e5c. 'te--, 1-3 c.-017-ef"--F PPr1-k () t--4 17-2nr2-, 6Tr-Ini ,40 -i- 15 a5 C c-A4---c2A A T\/-1--,!,c..t7r-Lf PIT. DO \kW STP---5'1-31t— A-ipp-0/0 • • 6 If Ci-a7 cA'S \,) 6 , cot, pk-F-41, 0.10-rev \ t-r AJ to (2-4 (?-A-C) 5 t iNA‘p I P-6 cfc (" DI A t gl.P PA1 Thka ie.44;;Ne.":), !;'-'• I 'I." Cs= •Tioqb‘-s") VELOCITY @ DS END OF APRON Worksheet for Irregular Channel Project Description Project File p:\autocad projects\by job number\2007449 appaloosa In -rolling hills\drainage.fm2 Worksheet NATURAL DRAINAGE COURSE Flow Element Irregular Channel Method Manning's Formula Solve For Water Elevation Input Data Channel Slope 0.130000 ft/ft Elevation range: 849.50 ft to 860.00 ft. Station (ft) Elevation (ft) Start Station End Station Roughness 0.00 860.00 0.00 68.00 0.040 7.00 855.00 16.00 851.00 20.00 850.00 30.00 849.50 48.00 849.50 50.00 850.00 60.00 855.00 68.00 860.00 Discharge 55.00 cfs Results Wtd. Mannings Coefficient 0.040 Water Surface Elevation 849.89 ft Flow Area 8.77 ft2 Wetted Perimeter 27.35 ft Top Width 27.29 ft Height 0.39 ft Critical Depth 850.07 ft Critical Slope 0.030194 ft/ft Velocity 6.27 ft/s Velocity Head 0.61 ft Specific Energy 850.50 ft Froude Number 1.95 Flow is supercritical. 10/13/10 10:19:32 AM FlowMaster v5.15 Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 (203) 755-1666 Page 1 of 1 Project Description Project File Worksheet Flow Element Method Solve For Cross Section @ DS End of Apron Cross Section for Irregular Channel p:\autocad projects\by job number\2007449 appaloosa In -rolling hills\drainage.fm2 NATURAL DRAINAGE COURSE Irregular Channel Manning's Formula Water Elevation Section Data Wtd. Mannings Coefficient Channel Slope Water Surface Elevation Discharge 856.0 854.0 (> a) UJ 852.0 850.0 848.0 0.0 10.0 0.040 0.130000 ft/ft 849.89 ft 55.00 cfs 20.0 30.0 40.0 Station (ft) 50.0 60.0 70.0 10/13/10 10:30:17 AM FlowMaster v5.15 Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 (203) 755-1666 Page 1 of 1 F ) 4 . 4 6 • • F = 50 t -l00 -- P = .417 F "223 100 • ... ,. y- .223^ :.._.__: Qy = (_) Q Where: QX = a known t1 for frequency x. 90 8-3 y = the frequency for the desired Q. 70 1-:_"I- I = _: = I I :' •. -==I: I:-:r_ J_ -=-= = -- :'I `• 20 >— 1 S.ILI i—e—F— Z -- ..... .:- =t= --= -. _k I"• .' -:„.....„..--____._...___•• ••_,_______ ....... i.„ • __• ___ __ =� =: (:�:t.-M=- -----� - ._.._ — ........._ to L 1 _ 1 .' • - • • _—r--t 1- j-t _;---- :t--� - --r- -- • • 1- gr==-- _--._::�_= =•.-. . _- ._-_�........... _..__. ---•I .. ..---•_-•-•-_ - ..__ -..._ a _t -�.. __-.._..—._ .__. I • : 4 _ =., --- --.... _ _t _ .- . _ : i �. �. _ •— = -- — --- —.— » -I ZS ; • - :.y '_-.- _ -- - -...• , _-.. j_ .4. _� •-.•••__=L _::..� i .. • • i-- - -- _. .. �,-�. _El.a;, : L-. :� =•:� - _-- -:r._ -.:4 ..r--1 -?I :r �l -: 4, ., r - --3" —._ : --!1 — ^ i...��1 • 175 i' - •I _ ����. 1 ' d ram_.-..'.::_.1' 44-, ... . _ ___f••• . 1:-.4:2,--r„:7;17__71.==4i-:::-•.:•-•----- • ••••--z-L..._., I _: t • . :.10: '-,..: ••It:`:':.zo• 25 30..' .43 -5C• 8'37707ss-3 901Cfl • ! 1S0 ... 200. 250•�.• _ . . • ,• (' :. t . • .. _.:. . .. ==---PERCF-rl OF.-CAPITAL-ELC3D PEA` Q (P) '. .: _.._ i . _.. -O. . i ..— .—._ — : _K ; r 7 ;.:•2-..r>:'� - t- LU L :.• L •?=r,":SE-91-S- C...-T-- �-- - I .L-—.-_.. _.._. - - •_Rc.'$ncC_ryr:ST PERCENT OF- CAPI T .L-. F.COD.t E4K .•. Q : , • i . CATE: 6 - II- -331'0 _- �`ArEF;SUS-TIAIi.F:���_-•FF<_£L- fd•C,-Y-- - T'�J • • Do 50 40 50 2D /0 • . 0 0 /O r a p •7 OC.. oGT��9 1 I.____D0• ego L$p :r7 to Do Do 52 20 Q 05/2 • 40 Lsp = 4proh length Da = Dicrletzr or Wig b of orm.. drain • RIP -RAP APRON LENGT a FIGURE /0. 5./ • • r. • RIPRAP ROCK SIZE 48 _ i I i 1 1 i 1 i: i 1 1: 1 € 1 1 1 •i 1 1 ' i• ! I ' '_' I i f I i :. I i € MI 1 ' i 1 1 I 1 1 i 0 1 i ; , i 0 i ; I 1 : i 1 Cr 1 i r f 18 . 1 i --- i -- 1 i I 1 I i. i 1 _�•a 1 i ! i ? I__ s: •i! i i i i i 1 i _: 1.: , _: f I 12 ->.-------i----•-- -�---- --- ---y- 4--- --- 1 : = 1 I 1 f i : ; ; ' I i • _ j »»__ ; • 1• 1 1- 4 1 ! i• 1 I 1 4� i : i L. : i I = f 1 f i : i i I ----i 1 . » . 1 1 i i I 1_.1 _._.1»..._..,_......i_ i i•-- 1 i i .. I 1 i i f i l l i ! 1 0 0 0 5 10 15 20 Bottom Velocity (fps) For rock with specific gravity = 2.65 . Source: Bureau of Reclamation 36 1* 1 1 1 i i 1 1 I 1 1. 1 1i 1 1 1 1 1 1 1 j i �I I ` 1 j : _ w. --.•i - ` i 1 1 I i i i i f l: r f i i _ 1: I I I I , b---------1- L•: • 11! 1 I• ! i I i I ! i i i. i = 1 1 --;---I.---•i I ° - - a -.•--- } I l i i 1 f 1 I I ..-..-�.......» I ---••-' : •-•• •• .----r-- 1 1 !• 1 ! 7 i 1 i i i 1 j1 i 1 r •r-- • i I i f f ! • I i I : E24 1 =. 1 1 i -t-- ----10 i i i i 1 1 i 1 1 i i 1 I i i , i ' 1 1 I i i I i I ` 1 F/• t .�.... r._-.I ..___[_______+___4......... ' 1 i 3 I i I i 1 1 i I 1 i i 1 i f I I : i ! i 5330 3700 5 2330 00 co 1350 ca - C 0 IL 691 m 0 Cr) (li 292 m O 86 p) Hydrology/Sedimentation Appendix Q -10 June 1993 • • Cut -Off Depths Velocities 0 - 6 f.p.s. 6 - 10 f.p.s. 10 - 15 f.p.s. 15 - 18 f.p.s. 18 - 20 f.p.s. LEVEE CRITERIA Straight Reaches 6-ft. 8-ft. 10-ft. 12.5 ft. 14 ft. Page F-31 *Curved Reach 9-ft. 12-ft. 15-ft. l8-ft. 21-ft./) *Check the cut off depth for curved reach on Chart F-06 on Page F-38 Use that depth if greater than given hereon. Material and Structural Requirements Concrete Levees (1 1/2:1 max. side slope) • Levee Thickness - T Velocities 0 - 10 f.p.s. 10 - 20 f.p.s. Straight Reach I Curved Reach 6-inch 8-inch Gunite Levees (1 1/2:1 max. side slopes) Velocities 8-inch 10-inch Levee Thickness - T Straight Reach Curved Reach Reinforcing #4 @ 18" Bothways #4 @ 18" Bothways Reinforcing 0 - 10 f.p.s. 8-inch 10-inch #4 @ 18" Bothways Gunite levees not permitted where velocities exceed 10 f.p.s. Hyd. ;'an. I1hJ M 1111111111111111M11111111 II1Ell jilt/Mill IIW I'�II 111111M [.........._.........._________________._________...........___.................... .... . . . . . . MAP INSERT SCALE 1 "=500' RUNOFF TABULATION ti SUBAREA/ SUBAREA SUBAREA TOTAL AREA TOTAL JUNVC NO (ACRE) (ACRE) (CFS) (ACRE) , (CFS) 1A 269 4682 269 4682 2A 19 8 36 43 46 7 77 40 3B 66 15.41 66 1541 PLAN SCALE 1 "=40' 2 Q50B= 77 40 CFS 2A=46 7 AC 9 SHH :945 9512 i i 0O Q 0O !0 cP cP O o3 DENSE" VEGETATION ;_ ; DENSE VEGETATION f 9415 ROLLING HILLS PROJECT SITE a,;; 4. R VICINITY MAP NOT TO SCALE LEGEND SUB AREA TIME OF CONCENTRATION (MIN) DRAINAGE SUBAREA DESIGN "Q" FOR REACH DRAINAGE AREA IN ACRES SUB AREA BOUNDARY 0508 (cfs) FROM SUBAREA 050B= BURNED RUNOFF IN CFS FOR 50 YEAR STORM BRUSH DATA. HYDROLOGY MAP 1—H 1 4 d lL NO 009 TUDY FREQUENCY 50 YRS - ISOHYET 5" DPA 6 FIRE FACTOR 0 83 4414 op E E Gi EE S CIVIL ENGINEERING,SURVEYING, & LAND PLANNING 24 W ST JOSEPH STREET ARCADIA, CA 91007-2854 TEL(626)446-4449 s s ,��\�►,� 4 + HYDROLOGY STUDY FOR 2 APPALOOSA LANE s0 9�� - ; } LOCATED IN THE CITY OF ROLLING HILLS s ��► �``\!ice � f S 9 .. , � I COUNTY OF LOS ANGELES, STATE OF CALIFORNIA SEE MAP INSERT FOR COMPLETE TRIBUTARY AREAS DESIGN --B R - DRAWN B R DATE 10-14-10 SCALE - 1 "=40' JN 2007449 E0 FUJ/KUk0 RCE 68530 SHT 1 OF 1 SHTS