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2326849 \U�mmmmmww IE - a��aa0 m wamao U S C'm 0 E E N G I N E E R I N G TRANSMITTAL To: Victor Villeneuve MDS Consulting 78 -900 Ave 47, Suite 208 La Quinta, Ca 92553 Phone: (760) 771 -4013 Q Irvine V' San Diego Inland Empire 1/ Date: 5/13/05 Project: Miles Avenue Project #: 646.01.01 Sent Via: ❑ Mail • ® Overnight ❑ Messenger ❑ Other This material is forwarded to you for: ❑ Your Files ® Per Your Request ❑ Your Review ❑ Bid Pricing ❑ Plan Checking ❑, You r Signature ❑ Other Copies Description (1) Copv of roroiect file Remarks: From: Copy: Lee Jaeger File ' l u l l c i r c l e t h i n k i ri 9 10390 Commerce Ctr. Dr., Ste. 200, Rancho Cucamonga, CA 91730 0 tel 909.581.0676 0 fax 909.581.0696 0 www.fuscoe.com l i I i 'I I i J NONE _kn 1 N W T � X11 m 1F ,55 o O � ❑ 10� T s uJ N 1 N W T � X11 m 1F ,55 o O � ❑ 10� T ■ t ay �'�� • o ► �► �J MY Mmj f N � ROSENO ONE AND TWO EXHIBI FUSCOE _ Esci��E4ti�c ■ KWL ASSOC A 712 Eugene* cJ INC. PALM SPRINGS, CALIFORNIA 92�634"WW (619) 327.7786 JOB - / 94h- '0 Z3 2 SHEET NO. 'Raw OF CALCULATED BY DATE CHECKED BY DATE Zd Af SCALE &� f sw I`o ■ ■ NINE ■ Em NONE No mmm No mm No M ON No KWL ASSMIAJK )IC. 712 Eugene PALM SPRINGS, CALIFORNIA 92264 (619) 327.7786 0 4111111011m JOB- �mmmJ.m mm. mmmm CHECKED BY 40 DATE SCALE ONE f N, E i I 1 E i :... �.. CATcN : ,�3RSiN ' S /ZINC KWL ASSOCIA INC. ' 712 Eugene Road PALM SPRINGS, CALIFORNIA 92264 (619) 327 -7786 JOB IX A Vf 03� SHEET NO. CF CALCULATED SY �' • �n • DATE CHECKED 0Y -J,4A DATE�Z7 — SCALE /' I �Lt �1►i fNCr. / la., font *& Awl A2 A/ YO R4 7-C v G. 40. "Ma 7Ki tee b" 4w am Glut DEPTH OF FLOW (feet) ........ 0 STREET SLOPE (percent) ^ ^ ^ ��Q `..~ 1�w�n . = D (cfs) ^~^`^~^^^^^~~ = M.97 VELOCITY (fps) . . . . . .. . . . ~ . . . . . = 4 2 ' POAD FLOOD INE WIDTH (f ^ I BSI STREET FLOW A DEFTH OF FLOW (feet) ...."."... STREET SLOPE (percent) .,..~' Q(cfs) .^..,....~.~~,~"."^~~~ VELOCITY (fps) ................ | ROAD FLOODING WIDTH (feet) ..,' = 0.70 = 1.40 =`109. SE = 5.9 = 40.0 | a,�) . � . . EACH PKh�Y 1�1-00D WIDTH < September 20, 1988 D- Valley Land Development Company Post Office Box 750 La Quinta, California 92253 Project: Tentative Tracts 23268 and 23269 an Seventy -One Acre Future Tract Le Quinta, California Subject: Percolation Testing tar Stormwater Runof B7- 0775 -P1 88 -09 -731 Test Min /Inch Gal /Sq. Ft. /Day A .36 38.4 B .20 64.6 ffonsomaws C .25 66.5 D .19 67.7 E .33 50.4 F .20 67.5 The percolation rates provided above are ultimate values and have not had a safety factor applied. Because water to be introduced into the system will be stormwater runoff, a potential of silting of the percolating soils should be addressed. It is recommended that an appropriate safety factor be applied to the above rates. The approxirriate locations of test holes are shown on the attached plan. Please contact the undersigned if there are any questions concerning this report. BUENA ENGINFFRC stir 0 i N R C F C a w C D HYDROLOGY MANUAL RATIONAL METHOD CALCULATION FORM PROJECT /Vo. 23 2�8 FREQUENCY v c "d'wU WrT No. 8638 -#C Ex p 123 1 °J2 )f Jl9l CiVIL� Chocked 1, shoot NCL of LSo»ets I er -- - -M__S2 _-I - -5 1� DRAINAGE AREA sell b Devolepw nt A Acres I to /phcc C A C�yF S s 0 C FS ION v FPS t_ FT. T MIN. ET REMARKS N /'Set -, I4 3.{J .i tCj ".�� IZ ..n..w�. e,4 L�'f Sip A6,�12 �- s.F.'14 S-7 3.50 .70 14.0 t S. (o �.►. �wi5.(.- 1_. oo A 14 ,o � V 5 rca+.� '5.A g 2So t [3 -� A,fS.r. y4 t2.o .b$- Z7. ,.At a- D - 7. - -a 41,=3 .005t 4e•s��.. 2.8 -lit 4_'2 S F' i, 4 S -5 7 !0.8 2t -Z F. P�►�� D -�.s =a c7iSTC�� ,e0 7 2. d., a, p t"A C- t A fS•G. ��¢ S•°J '3.3 .te 13.C� 1 %_O ,n, .' X C 7, !) Lz 20 c4, �S 13- .00s 5rt- / 2_3 . L•c" G -2 S.F. '/4 &,4 2.T1� :G$�� 12.a 23.to P..+Tv D -7.S d�o.S7� 25.E -005 sT,e� .4o s�� 2.CC, ' 230 1 -S C.'3 /S S.F. S.-7 2.�0 l.7sf <O.Z Zs - P ,Art, 5 .80cj Src. 4p'Src. 3.a 14-D C- ¢ A IS .f . r�4- B 5 2.t�2 .G4a �.7 Q.so .7 - =0,-7 ry 7 1 n V v b h V h n � w ' m v g r b . in o h w r a O q n V v b � V h n � w ' m v g r b . V W N Z W I N V v b � V h e C o w r a O q V W N Z W I N V v b o e C o V W N Z W I N N • (f) W S U Z I V / z W Z J LL Z cr- Q g� r W r a z M J W > • a SMNI� �% nNAr !A� j r •nrlf i lAhNw NN ♦•i ♦! IM1rh u • W • • • • • • N IAN r • • ! ! • i f • M M • A _ •+A If InA AAAAA' • • • • W NNNNN NNNNN NNrrr .. rrrrr ., ,. ,. .•.., O ' Ate:* 1ti • i A tIw i / t ♦ AN�+I•INr•• ! h !r• M •• •++• NA• i h ••• !M• N• •• .+ • A• I• 1 l • �y• 1� N • ^• n• hNa It �• •i N • A • • • • • • • + > A NNN N N NNN r r 9M •• W • 7 I w --- MiA•! •r Nn• N•A-! r r r r r r r r •N•i• ----- •Nf �1• r r r r •NiNi M•IH•N r r r r r r r N NNN N A AAA A ♦• M M• • h h i• • O M > A r v J t yO I > > •! AiMM•r Nih N •M�yNN A•N•! ►•NN! 111li•• Ar..Mr _ �� •.•• • iN•�•" �IAMr ii >i♦ nnN :• ••w•• Nf A ♦A dr�MN• ♦ffAA AAAAA ANNNN NNNNN •.• • •• O W t ♦ A r^ M A N• i• ! r• A r M M F► N • •+• Ni i i l A s t i t r A f ! w • I A N r• !.! • h• M N ♦ f n A N N .-• ••• 2 •• A• V r W • • • • • • r •r! •i• Y • AAA N N NNN N N N N r r r r r ••.r • •• • • • • • • • • • ♦ •. ry r r r r w w r r r M r W • • •M1 O J N WI Q RVr V a wuu — STANDARD HYDROLOGY MANUAL INTENSITY •- DURATION CURVES DATAmmmom PI ATF n•L 1 11i -a c1 le- I— r r > r y • r 4 M r w• N• h S N N•V • N N N � A N•► 1• .no N• i • • •M••A M VZ t •� � :qN : i�h •♦ nAN • •iw •.• Y1 • • nn w i'• M M ♦ f f ♦ A r1 AA AA 0% A N N N N N N OW OW N.r ,�•r ,., .,•,,, ,,•�. �• Y a ,,,; r••...rr i J J a •� wt •A♦ r 1 A NN/ • N:•• AANaA • h i• 0 1yi •,� rnAniA •iAi• ihfN• • > W r ►�N 004 S•1P AN N• •!A A > • N N•iH•i NAi ►♦ 1yf�� • be, „ t 8 P. •An AA NNNrr NNNNN .•.+r ^ • • • • rrrr • • • • a V NNNNN rw•r .r .•,.. •. 1 h �W M M i A i! i r N A♦ M• w•• • N 1!! • N t•• W M NNN M•Ir AAAAA Moog: :row,:: M' •'► '� � M• h•! • r N n t '” " ^' 1/1 • h•! ^ ^' • N f•• • N I• t • N• N• M• M■ N J M y� O ,Z ! ^" ^ ^� N N N N N A n A A • IMM♦ + h h!• > A r v J t yO I > > •! AiMM•r Nih N •M�yNN A•N•! ►•NN! 111li•• Ar..Mr _ �� •.•• • iN•�•" �IAMr ii >i♦ nnN :• ••w•• Nf A ♦A dr�MN• ♦ffAA AAAAA ANNNN NNNNN •.• • •• O W t ♦ A r^ M A N• i• ! r• A r M M F► N • •+• Ni i i l A s t i t r A f ! w • I A N r• !.! • h• M N ♦ f n A N N .-• ••• 2 •• A• V r W • • • • • • r •r! •i• Y • AAA N N NNN N N N N r r r r r ••.r • •• • • • • • • • • • ♦ •. ry r r r r w w r r r M r W • • •M1 O J N WI Q RVr V a wuu — STANDARD HYDROLOGY MANUAL INTENSITY •- DURATION CURVES DATAmmmom PI ATF n•L 1 11i -a c1 le- I— r r > S •• i•h • AA•• • nh • NN Vir•► NA++•N •hiMM 0Nl��► fAff•• • N�IiNr rr iry� •M••A _ ">' M♦ nN.• ••••i• w •iry M1f ANNNr "►' • f ♦AA AAnn N N N N N N NNNNN IY r r rr rr • • •, —rte Y a ,,,; r••...rr i J J t •� wt •A♦ r 1 A NN/ • N:•• AANaA • h i• 0 1yi •,� rnAniA •iAi• ihfN• i > ` r y > •± • • • • • M M• I A • • • • A NNN r r 0• ►! ! iii • t 8 nNNNN NNNrr rrrrr .•.+r ^ • • • • rrrr • • • • a V .•,.. •. 1 u �W M M i A i! i r N A♦ M• w•• • N 1!! • N t•• M W NNN M•Ir AAAAA Moog: :row,:: •'► '� � MiPi• irNllf r rrrr M�wi! •..rrrr •NI r• •N• 01A• • M•M• iH i iR • M M �I NNNNN A AA A • IMM♦ +AAi.i > A r v J t yO I > > •! AiMM•r Nih N •M�yNN A•N•! ►•NN! 111li•• Ar..Mr _ �� •.•• • iN•�•" �IAMr ii >i♦ nnN :• ••w•• Nf A ♦A dr�MN• ♦ffAA AAAAA ANNNN NNNNN •.• • •• O W t ♦ A r^ M A N• i• ! r• A r M M F► N • •+• Ni i i l A s t i t r A f ! w • I A N r• !.! • h• M N ♦ f n A N N .-• ••• 2 •• A• V r W • • • • • • r •r! •i• Y • AAA N N NNN N N N N r r r r r ••.r • •• • • • • • • • • • ♦ •. ry r r r r w w r r r M r W • • •M1 O J N WI Q RVr V a wuu — STANDARD HYDROLOGY MANUAL INTENSITY •- DURATION CURVES DATAmmmom PI ATF n•L 1 11i -a c1 le- I— r r > f • • • A i 1 A ••NN! N i• ��11 w ANAN •• i r 1 •lah.• • n N N n N• r N• N 1 • N h t! f• 1 _ M♦ nN.• • ►! •i hr•N 1 f ANNNr "►' Nf•fA AAAAA nNNNN NNNNN Nr ,.. •., ,,, Y a ,,,; r••...rr J J W r r N 00% A N• • N A • r r• !• • • N• • N • •• h r • ! -00, ! N N ! N Mi > Y > • • • • • • • • N •i • • • • aft, • .A A • h 8 A N r r r r r .• r r r r .r • • • • r r r r •+ r r V 41 M i A i! i r N A♦ M• w•• • N 1!! • N t•• M NNN M•Ir AAAAA Moog: :row,:: M ! "x > A r v J t yO I > > •! AiMM•r Nih N •M�yNN A•N•! ►•NN! 111li•• Ar..Mr _ �� •.•• • iN•�•" �IAMr ii >i♦ nnN :• ••w•• Nf A ♦A dr�MN• ♦ffAA AAAAA ANNNN NNNNN •.• • •• O W t ♦ A r^ M A N• i• ! r• A r M M F► N • •+• Ni i i l A s t i t r A f ! w • I A N r• !.! • h• M N ♦ f n A N N .-• ••• 2 •• A• V r W • • • • • • r •r! •i• Y • AAA N N NNN N N N N r r r r r ••.r • •• • • • • • • • • • ♦ •. ry r r r r w w r r r M r W • • •M1 O J N WI Q RVr V a wuu — STANDARD HYDROLOGY MANUAL INTENSITY •- DURATION CURVES DATAmmmom PI ATF n•L 1 11i -a c1 le- I— r r r.:_. . • .•• LIMITATIONS: a00 c I. Maxiawm length =1000 2. Maximum orea i 10 Acres Y35 7 c 400 0` 30 b � f 350 25 T 'c 300 •E A 20 19 N :.. 250 IT 100 . 16 t C 15 14 LIMITATIONS: ISO � I. Maxiawm length =1000 2. Maximum orea i 10 Acres .ft i 7 b � Y r T 200 N 100 . o C a 20 K X41 tJndewtef�d 0 ° Good Covw 2 FoiU�nd!d Pood 0 .3 S44W Fon%ily C 200 c j.lP r. O ISO � 9 ~ a 7 £x 5 RCFC & WCD HYDROLOGY MANUAL hHH+ I� i w w W mw--KEY mm L --H -Tc -K--Tc Tc 6 � u 7 � C V a E 9 o POO 10 E a P 14 13 16 IT is t9 20 12 C O S C 25 u u 30 ° -EXAMPLE E (1) L =550', .H =5.0; K = Single Family (1 /4 Ac.) ~ 35 Devebpment , Tc s 12.6 min. (2) L =530, H =5.0% K = Commoreiol Development , Tc = 9.7 min. 40 NISI �o le c - CoKCio 19 ( 20 -- v � c 25- K L•ti Tc -K -Tc' a 30 RAMP 'E • • 1 18 500 0 (I j a 10 1 ! Y 35 E K. � 400 c 30 0 = �1.. Good Cover 0 350 25 2 1 o � U+W E 3 300 'c ,e 9 ,-250 0 . Is 17 {{ w J w ... .2 Z 1 7- c° 14 17 E 200 2 13 21 II 0 150 �o le c - CoKCio 19 ( 20 -- v � c 25- K L•ti Tc -K -Tc' a 30 RAMP 'E O • • 1 18 20 9 9 0 0 a 10 1 10 E E K. � 0 = �1.. Good Cover 0 = 2 2 1 12 c c U+W i.0 Fair � 14 Undwd 0 0 . {{ w w .2 Z SW* Fe" 1 17 E E c � = m s< n .+ii r0 O RAINFALL INTENSITY - INCHES PER HOUR CATHEDRAL CITY I CHERRY VALLEY DURATION FREQUENCY DUR4TIDM MIM41TEi MINUTES 30 140 T[AR T[AR 6.76 6.0• 5.56 9.19 4.41 Goat 4.20 4.07 7.n L T8 3.94 3.46 3.31 3.18 ).11 3.43 2.06 2.72 2.60 2.47 2.39 2.30 2.22 2.1s 2.67 7.02 lose 1.70 I." 1.60 1.53 1.46 1.41 1.35, 1.31 s i 7 • • 10 11 I2 13 1♦ is 16 17 10 I• 20 t• 26 24 34 it 34 36 3• 40 4S SO ss 64 6S 74 7s Be as' FREQUENCr If 100 YEAR YEAR 3.30 4.1T 3.03 4.36 2.•t 4.24 2.64 3.11 1.49 3.75 2.36 3.S6 lots 3.37 2.16 3.2s 2.47 3.12 1.00 3.40 1.02 2.90 1.06 2.00 1.06 2.T1 l.Ts 2.66 1.70 2.56 1.61 t.43 1.04 2.32 1.4T 2.22 1.41 2.13 1.36 2.4s 1.31 1.94 1.27 1.71 1.23 1.0s 1.24 1.66 1.16 1.75 1.07 1." 1.03 I.ss .e0 1.47 .13 1.49 .81 1.34 .8s 1.2• .a2 1.Z4 .7• 1.26 .77 1.16 SLOPE ■ .SSA COROMA ! DESERT NOT SPRINGS 1 ELSINORE - YILOOMAR DURATION MINUTES S 6 7 • • la I1 It 13 14 is 16 IT 1• i• t4 22 24 26 2• 36 32 34 36 34 40 4S s4 ss 60 65 is Ts as as FRESUEMCT 10 1s• YEAR YEAR 2.64 4.34 2.44 4.67 2.47 3.61 2.34 3.60 2.22 3.43 2.12 3.27 2.04 3.14 1.96, 3.12 1.8• 2.12 1.•a 2.62 1.77 2.T3 1.72 . t." 1.64 2.s8 1.63 2.S2 1.se 2.46 I.S2. 2.3s 1.46 2.ls 1.46 2.17 1.36 2.61 1.31 2.02 1.27 1. +4 1.23 1.06 1.24 1.6S 1.17 1.81 1.14 1.76 1.08 1.44 1.43 1.04 .e4 I.sl .14 1.4s .e0 1.40 .47 1.35 .84 1.30 .42 1.26 .80 1.23 SLOPE a .480 DURATION "( MINUTES is 110 f 4014 TEAR s 4.30 7 3.41 3.K 6.0• C) a • 3.1s 20" • 3.3s s.is • 3.13 4.01 Z O l0 2.77 2.t0 6.28 12 1I P.61 13 2.S3 ).N It 2.40 3.72 i 2.32 13 2.34 2.24 3.44 17 16 8.28 1• t�� •%!p tells loll 1e 2.03 3.12 17 l.44 3.03 22 1.04 is 1.•1 1.TY 2.72 26 10 1001 20 1.62 2.49 20 I.•f 2.37 32 1.S4 it 1. Ts 1.4s 2.22 36 1.44 1.67 30 1.36 2.01 2S 4.S• 2.02 4s 1.23 to I.S2 1.16 1.74 SS 30 1.46 60 1.04 1.64 38 1.41 1.53 Z .ts 34 1.36 .91 1.41 s4 36 1.32 as as 1.31 38 1.28 rTi 2 2 40 1.24 As 1.I6 - so sf 1.03 1.03 rq m -c b Z 60 .1• 0 6S .•4 O D 7• .10 O C ;0 Ts .06 is .06 > 0 SLOPE .Sae Z 6.76 6.0• 5.56 9.19 4.41 Goat 4.20 4.07 7.n L T8 3.94 3.46 3.31 3.18 ).11 3.43 2.06 2.72 2.60 2.47 2.39 2.30 2.22 2.1s 2.67 7.02 lose 1.70 I." 1.60 1.53 1.46 1.41 1.35, 1.31 s i 7 • • 10 11 I2 13 1♦ is 16 17 10 I• 20 t• 26 24 34 it 34 36 3• 40 4S SO ss 64 6S 74 7s Be as' FREQUENCr If 100 YEAR YEAR 3.30 4.1T 3.03 4.36 2.•t 4.24 2.64 3.11 1.49 3.75 2.36 3.S6 lots 3.37 2.16 3.2s 2.47 3.12 1.00 3.40 1.02 2.90 1.06 2.00 1.06 2.T1 l.Ts 2.66 1.70 2.56 1.61 t.43 1.04 2.32 1.4T 2.22 1.41 2.13 1.36 2.4s 1.31 1.94 1.27 1.71 1.23 1.0s 1.24 1.66 1.16 1.75 1.07 1." 1.03 I.ss .e0 1.47 .13 1.49 .81 1.34 .8s 1.2• .a2 1.Z4 .7• 1.26 .77 1.16 SLOPE ■ .SSA COROMA ! DESERT NOT SPRINGS 1 ELSINORE - YILOOMAR DURATION MINUTES S 6 7 • • la I1 It 13 14 is 16 IT 1• i• t4 22 24 26 2• 36 32 34 36 34 40 4S s4 ss 60 65 is Ts as as FRESUEMCT 10 1s• YEAR YEAR 2.64 4.34 2.44 4.67 2.47 3.61 2.34 3.60 2.22 3.43 2.12 3.27 2.04 3.14 1.96, 3.12 1.8• 2.12 1.•a 2.62 1.77 2.T3 1.72 . t." 1.64 2.s8 1.63 2.S2 1.se 2.46 I.S2. 2.3s 1.46 2.ls 1.46 2.17 1.36 2.61 1.31 2.02 1.27 1. +4 1.23 1.06 1.24 1.6S 1.17 1.81 1.14 1.76 1.08 1.44 1.43 1.04 .e4 I.sl .14 1.4s .e0 1.40 .47 1.35 .84 1.30 .42 1.26 .80 1.23 SLOPE a .480 DURATION FREQUENCY MINUTES is 110 YEAR TEAR s 4.30 6.76 6 3.K 6.0• 7 3.62 S.S6 • 3.3s s.is • 3.13 4.01 10 2.94 4.S2 1l 2.t0 6.28 12 2.6S 4.07 13 2.S3 ).N 14 2.42 3.72 is 2.32 3.501 16 2.24 3.44 17 2.16 3.32 1• 2.69 3.22 1e 2.03 3.12 20 1.17 3.03 22 1.04 2.04 24 1.TY 2.72 26 1.49 2.60 20 1.62 2.49 10 I.SS 2.37 32 1.S4 2.30 34 1.4s 2.22 36 1.44 2.IS 30 1.36 2.01 46 1.32 2.02 4s 1.23 1.01 so - 1.16 1.74 SS 1.09 I.68 60 1.04 1.64 6S . M 1.53 70 .ts 1.46 7s .91 1.41 s4 .00 1.3S as as 1.31 SLOPE - ..SAO DURATION FREQUENCY MINUTES is 100 YEAR YEAR S 3.23 4.74 6 2.16 6.53 7 2.Ts 4.21 a 2.Sa 3.es 0 2.44 3.73 10 2.32 3.S4 11 2.21 3.37 12 2.12 3.2S 13 2.64 3.13 14 1.97 3.42 is 1.11 2.92 16 I.0S 2.43 17 1.N 2.75 1• 1.7s 2.47 19 1.78 2.60 20 1.66 2.S4 22 1.50 2.43 24 1.S2 2.33 26 1.46 2.24 20 1.41 2.16 30 1.37 2.4• 32 1.33 2.03 34 1.27 1.17 36 1.2S 1.72 30 1.22 1.47 40 1.11 1.42 45 1.t) 1.72 SO 1.07 1.64 SS 1.42 1.06 64 .e0 1.SO 6S .e4 1.44 To .91 1.39 7S. .•• 1.3s 04 as 1.31 as .93 1.27 SLOPE s .480 A VEA �3- f v�• %l l "v KWL ASSOCIAt NC.. 712 ' Eugene oad, PALM SPRINGS, CALIFORNIA 92264 (619) 327•776c i 4- (Q�f-• ch (U � I JOB SHEET NO. / OF CALCULATED BY- , v�� + DATET�p� CHECKED BY r- �y�� DATE SCALE KWL ASSOCIA. INC. 712 Eugene d PALM SPRINGS, CALIFORNIA 92264 (619) 327.7786 JOB SHEET NO. OF , Y - -- CALCULATED BY /.� DATE 9/g CHECKED BY DATE _ X/'4 Ape SCALE___ mp4mla'a OEM mom MEN 0 0 mol M MIME NOMEMEMEMEMENIMME INN MEMO NOME MEMEMEMME MEMO 0 NEESE A MEMNON roil NEEMENE KWL ASSOCIA )lc. 712 Eugenew . PALM SPRINGS, CALIFORNIA 92264 (61.9) 327.7786 ... ......... .......... . ............. ............. ............. °........... 'Al ........... . ....... .. . .......... . .......... ............. . ............. .............. ............. ............. .. .......... . .......... .......... . .. ............. ...... . . ............. .............. ............ .............. ............. j.. ....... .... .............. ............. ......... ... .............. ............. ............ .... .. .... 'FRIA: jr.; .......... ;...-M . .......... . .............. JOB SHEET NO. OF CALCULATED 'BY-------k!!!4- 'DATE CHECKED BY DATE SCALE ............ It .. . ..... . ... . . . ..... ....... . ... . ... ... . . ....... . .......... (Qg-co . #-V , . KWL ASSOCI. INC. 712 Eugen*-oacd SHEET NO.fI04 OF PALM SPRINGS, CALIFORNIA 92264 c��cu�Areo BY R •'Nl . S2. DATE 1 (619) 327.7786 _ CHECKED BY J A—. DATE f R. NG£ So.1ir5 TEST CPfQCD.C.�o.T�o.',J, :R�'j► . EE �. �. �t~cR.c.o.La7 � oh1 j2AT'� � 67`�. ,.. .... c. 7 l . � G 70 s-r 7010 -jH �.........,........... `164�7i -i 4geA : /'yl� /Ld NG� .S'O�A/S�C�CLt- /DD yr- ,rOn - Z¢ hrs : X2.8 b T. D2 55; .7/? G� W / ... V� v `� .. No. 8638 Eap.12.31%pp. '9 �. R. NG£ So.1ir5 TEST CPfQCD.C.�o.T�o.',J, :R�'j► . EE �. �. �t~cR.c.o.La7 � oh1 j2AT'� � 67`�. ,.. .... c. 7 l . � G 70 s-r 7010 -jH �.........,........... `164�7i -i 4geA : /'yl� /Ld NG� .S'O�A/S�C�CLt- /DD yr- ,rOn - Z¢ hrs : X2.8 b T. D2 55; .7/? G� W / ... V� v `� .. No. 8638 Eap.12.31%pp. '9 �. JOB KWL ASSOCIA (NC.' , 712 Eugene d ! SMEET HO. `. OF 8 PALM SPRINGS, CALIKI NIA X92264 R M , �Q, /Z 30 8� (619) 327.77 CALCULATED BY pA,E _ _ CHECKED BY J. 4-4. DATE 'BCALE KWL ASSOCIA •'k - 712 Eugene R ad . PALM SPRINGS, CALIFORNIA 92264 (619).327-7786. pow — 3. 8 SHEET NO. OF CALCULATED BY �' - GATE Z O _ CMECKEOBY- JAI, DATE_ Z 0 � , wilNyrdla. ita Ym WII KWL ASSOCI . INC. 712 Eugenie` ad i. PALM SPRINGS, CALIFORNIA 92264 (619) 327.7786 i Joe , 7RAG�4 •. Z 3Z.GfI t . SHEET NO. �� -_, OF 6 CALCULATED BY le' � DATE _ 7- 3�,G =_ CHECKED BY y DATE _ Z SO / SCALE . . _ ........ r.._... ..... . ........ ..........,....... _........... . 4 i JDO Zvv. . i ? i (p KWL ASSOCIA -,INC. 712 EUgei ttlmaiC7 SHEET NO. OF ' PALM SPRINGS, CAUFORNIA 92264 JAI. , (619) .37.7786 CALCULATED BY' OATS CHECKED BY 'J�� " DATE i SCALE C- le .1-1,VA9 ,4L� 6,6 8!� wail*. Q e}o :.'... , ;DU7�..E:Y . Coa:T�.SI .. .. , ......... ... ...;.. :..._ SuP,MEiRC, F0 Woos . at....................... L =Z1� .4"1o,2 ,r i42� :_.. •4108 ........ ....... .. . WF. i N V � l:2 Nv @ c•t3� V.�..._.A . �.... 4;q..1:;...:.: _ 'B..• Cv ..... '� _ ...... /.(p7 :.. ...... _.. .... .. :..... f� 90.47 i... ... ... :`_ ..........:............. .-pQ c p.Z 4, Z ,..Z1.,y.....• . ..r... .. T :; •440 /�Oqp il►1 Ncif 4.. iMw � W!1" " KWL ASSOCIA NC. 712 Eugene d. i. PALM SPRINGS, CALIFORNIA 92264 (619) 327.7786 ' JOB- •- Q SHEET HO. ..OF n [J rQ r CALCULATED BY ' ' '` ' V Q� DATE CHECKED BY DATE _ Z 8CALE 24 D,U7 L T CPA/ 7A26)4.15 1�• ScJ�3MERGED WS:..� BB- BD ................. C. b ,1+L4 M c. 4. ; �a 4 ".ecP ' l 2 9 B: • ' ....._.: .......:.. .... _ _ a z`i ol v •`o�•e`_ Alr W 115 C' C.40. I 14.9 �24o► = Z:Zlo•2. 'icy 24 2 2 Z 26 z L = 40 ` Nf A111 /• 21NV c cg Qom. 4_2 4 . 9 .... a C.e. KWL ASSOCIA. �C. 71 Eugene r PALM SPRINGS, CALIFORNIA 92264 (619) 327.7786 JOB • V SHEET NO. i OF 1 CALCULATED BYQ DATE CHECKED BY " DATE 1213o 1W '94 T.c,..�.:c� , ke %off' Sir, Hf Y✓;__� . /.2NyC ... .... . ........ :...... . ..... V= �• / ' w s. I G c,s. ' 96.17 mw a►I NrrY Ia.. i�a 1{111. - ' Joe KWL ASSXIA C; a�aco Z'3 Zfo 8 '' 712 Eugene d BNEET ND. OF — r PALM SPRINGS, CALIFORNIA '92264 G (619) 327.7786 CALCULATED BY �� irJ' `7'f DATE L o _ CHECKED BY DATE Ile, SCALE BSI STREET FLOW PROGRAM �1. 1/2 STREET WIDTH (feet) ` , = 20.00 2. PARKWAY WIDTH (feqt>�.j.......... = 10.00 3. CURB FACE HEIGHT (feet) ' ^...^.... = 0.50 4 . CURB BATTER (4 � :12 for LACo RD) . = 3 :12 5. STREET CROSS SLOPE (percent) .... = 2;000 6. 'PARKWAY CROSS SLOPE (perchht) ... = 2,000 7. 'SUTTER WIDTH (feet) � ^^�`^^^.^..... = 1.50 S. GUTTER RISE (f�et�) ^............. = 0.09 9. A. C. LIP AT GUTTER (feet) ...~,. = 0.03 10. STREET n VALUE ...�,........,...... 11. PARKWAY n VALUE ^^^^^~^~^.....~.. = 0.030 121 MEDIAN'CURB FACE HEIGHT (f t)� � ee .. = 0.00 DEIPT' OF FLOW (feet) ' �' ^^^^^~^~^^ = 0.50 i STREET SLOPE (percent) � . ^�~^^^^^^ = 1.40 D (cfs) � � ^^^^~^^^~^^~'^^,^^^`^.. = 35.97 VELOCIfY <f ~,,,, ps) ^ _,,,,,,,^,, = 4.2 ?OAD FLOODING WIDTH (feet) � .... = 40.0 �[~ 5p � / *�~` `^ L/ �� L� ��.,�� (y� � . / �l - f4- u ^\^ ^ ` BSI STREET FLOW-PROGRAM el d, � �/ ' x�^ 11 1/2 STREET WIDTH (feet) � ee ^ . . . . . . . ^ = 2� 00 �v�` =t> 2. � PARKWAY WIDTH (feet) � ^ = ^ ^ ^ ^~ ^ ^ ^ ^ ^ 10 00 | `' 3 �� . CURB FACE HEIGHT <ft) ~ ^ ^ ^ ^ ^ ^ ^ ^ ^ = C 50 4. CURB BATTER-0:12 Ar LA Co RN . = 3' :12 5. STREET CROSS SCOPE (percent) ,.�� = 2.000 /) 6. PARKWAY CROSS SLOPE (purcent) ... = 2^ ~000 �. GUTTER WIDTH (feet) = 8^ GUTTER RISE (feet) ^ ~^^^^^^^^^~^^ =� 1^50 ^ ^ ^ ^ ^ . . . . . . . . 9. A. C. LIP AT GUTTER (feet) ...... �0~03 10. STREET n VALUE ^^ ^ '' ^^^^^^`^,�........ = 0 015 ' 11. PARKWAY h �ALUE ^ �' ' � � . . ' . .^.� . . ~ . . . . . . . . . . . . = ' .12. MEDIAN CURB FACE HEIGHT (feet) ^ 0 038 ` ' c ee .. = 0.00 DEPTH 'OF FLOW (feet) � 0.70 STREET SLOPE (percent) ^ ^ = 1 40 Q (cfs) � ^� ^ ^^.~^^^~^^~^^... slog .be VELOCITY (fps) ' � ^^^^^^^^^^^~^^^^ = 5.9 | ROAD FLOODING (i WIDTH e�t) | � � e ~^^~ = 40.0 EACH PKWlY r-LQOD WIDTH (ft) � �0. September 20, 1988 D -1 Valley.land Development Company Post Dffice Box 750, La Quinta., California 92253 Project: Tentative Tracts 23268 and 23269 and Seventy -One Acre Future Tract Le Quinta, California . Subject:. Percolation T.esting.for Stormwater Runoff 07-0775-PI 88 -09 -731 As requested, we helve performed the drilling and .percolation testing for storm.w6ter runoff on -the above referenced projects: Six (6) test holes were excavated to a maximum'depth*-of .ten (10) feet below existing grade in the proposed areas. of ' the retention basins: Test results are as follows: Test Min /inch Gal /S ! Ft. /Day A .36 38.4 B .20 64.6 C � .25 616.5 D .19 67.7 E .33 50.4 F :.20 67.5 The percolation rates provided above are ultimate values and have not had a safety.factor ap.'plied. Because water to be introduced into the system will be stormwater runoff, a potential of silting of the percolating soils should be addressed. It is recommended that an appropriate safetiy factor- be applied to the above rates. The approxirnate locations of test holes are shown on the attached. plan. Please. contact the undersigned if there are any questions .concerning this report. Respectfully submitted, BUENA ENGINEERS, INC. Reviewed an Brett L. Anderson seph R. ee Staff Engineer Civil Enginee BUENA ENGINFFRC stir A G �!a. C r I C N R C FC & 'W C O HYDROLOGY MANUAL RATIONAL METHOD CALCULATION FORM PROJECT /?Ac-r /Uo- 23 Z�8 FREQUENCY V r �vy U O A• At'�oal wrf No. 8638 Exv, 12�319Z ]� sf9l C /Vlt " show No. of � shorts " by 46 .a ;T:':(7 pl br • -� . - - - - �- DRAINAGE AREA sell s Doislopoont A Aems I Is /Ac c Ac CFS s o Fs. ION v FPS L FT. T MIN. ET REMARKS —1 A /S.F,y4 3.95 .7iS 3.•3 S*- a4 S.-7 3.50 .7o r4.o - Z- Y IS T. 4• 12.0 �. . �0 27. 17. o �5 4i ►y Z. 41.3 oc5l S t,e ae•s�<<.. 2.8 i -t�2 4.,7- c. Js. V. .ya S -c, 7 lo. 8 2t: Z F,^,-L-,�. 57.1 G57 AY A. IS X. V4 S.5 3 •(e 13:6 1 % -D in. .� �7.0�" C.= 20 e►,zs.' � 3 -. .o0 2.3 9�o L•c. c -2 25.6 .00S ,�.e•s «, 2.to 230 l.S S.F. '�4 S.-7 2.10 L7s 10.2 ZS.. i Pu►rcf d 5 ; .00s Stc. o`Sec. 3 -0 14o o -a - C- 4 A jS:F.'14- m ►=i 2.(ol- ,G lo D:''i /. 25.4` - L- .so TV 1 0,'7 V ci vi I 9 _ 1,� ��ls srvdod i UJ Cn ti M w i OIN 1A i w. 01+� V ".. v h.R o till I N � a h ^ a N h N N S Q O 11 n n� n� ^ V v. w � h h O�i � � h O 11 n n� n� ^ V v. 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Maximum area = 10 Aerie .. 0 .3 Z IS 35 u H '16 A Y A. 400 g 30 LP b _. 350 b 25 0 200 N Q 20 -- .- 300 c e - 20 19 2S0 19 17 V • 16 t i 15 K A 14 J 200 C it 2 1 12 11 0 60 9 7 ❖� LIMITATIONS: �K ' I. Maximum lanath =100d, 2. Maximum area = 10 Aerie .. 0 .3 Z IS . u H '16 A Y r, LP b 30 0 b c - ca cie 200 N Q 20 -- OA O 20 a a' • i K A UndewlMN Good Covw ° it 2 U�derMe06d c �.0. TC 5--, 6 It 7 .. C v 9 0 10 Q 11 E Felt . Corer �K ' o w PoOtJreapd 0 .3 Z IS . -Foaolly '16 SM�Ie 17 (1/4.. b c - ca cie f9 20 -- 5 4 RCFC WCD HYDROLOGY MANUAL C 25 u KEY L-.H- c -K-TC 30 RAMP ; E (1) L =550, .N =5:0, K = .Single Fonnlly(l /4 Ac.) 35 QevebPmSnt , Te s 12.6 min. (2) L = 550', N =5.0', K s Can'"Wcial 40 Develop "t , TC = 9.7 min. AfzEA A- 1 Reference: Bibliography lte n No..35. 0 o' me �bn LIMITATIONS: I..Maxinwnn length =1000' Tc 1000 90 2. Maxinwnl area = 10 Acres 5 900 s.0 d 800 70 .. .H 6 -• 700 0 g' .> . b .. 300 200 7 600 ~ c *0 0 60. d 8 E. 500 3 0 � 20 9 . c° 35 .,0 1 . ! _ a �•2 10 E e 400 0 30 K A . ., lJndewlMe! • Good Cov" 0 2 12 c' . 0 350 � - v 25 e i.o F a E = d _ 300. r 14 �• v M ` •� 20 Poor Gever 0. .3. Z • . J 250 v 17' SInNN Fo�H 17 E 14' 7,7-- s 15 <o CanlnllerC H y P. e ( 20 1.3 12 2� S Ell 160 K � 9 L-H -Tc -K -Tc JN d 30 EXAMPLE: E_ 7 . (1) L a550%.H =5.0; K = Single Fannily(I /4 Ac,) ~ 35 Devoiopment , Tc. =12.6 rnin. 1OO (2) L =550 , H =5.0!, K s Comlvwciol . 40 1 Development , Tc = 9.7 Min. A)2EA 8-1 4 Reference: Bibliography item No, 33. R C F C011 W C D TIME OF CONCENTRATION HYDROLOGY MANUAL FOR INITIAL SUBAREA PI ATC n1_IL RAINFALL INTENSITY- INCHES PER HOUR CATMLORAL CITY ' CMEOW VALLEY ' CORONA I DESERT MOT's.Rtwes ' ELSINORE - rILOOMAR DURATION FREQUENCT MINUTES 1• 160 .TEAR YEAR -C O. 2 •.1• 6.T6 .3.73 6.00 3.41 9.86 3.1s s:ls !." •.01 to T1 •.9t to 62. •.!e 2.40 •:07. 2.30 3069 11.20 3.7E 1.10 3.3e fall 30•.' 11.0. 3038 1.91 3.88 loot 3011 1.09 3.63 1.Ts 2.06 1.67 ' !a Tt A.S9 1.40 lost 2049 1.46 2.39. 1.41 2.30 1.34 2.2! 1.3! 2.1s late 2.69 1.24 2.02 1.14 1.99 1.09 1.70 1.03 1.60„ . :1e late .9. 1.53 .9e ' 1:46 .06 1.41 .03 1.3s .00 .1.31 SLOP[ a .S00 DURATION MINUTES FREQUENCT l• 100 T•EAe YEAR DURATION MINUTES s DURAtIDN MINUTES. FREQUENCY t0 110 YEAR YEAR s 3.6s 5.40 S. C7 1. S r' 6.76 u 3.30 4.91 6 1• 4.30 1s '�►�' m 3,t�� ~ -it 3.99 6.00 7 as •.si 1.' '1.64 19 T 3.62 s.S6 20 2! 2.62 4.24 • 11.47 t6 is Q 3.3s S.-Is 9 to 3191 9 R.34 3.60 36. 3! 3.13 4.01 I@ &a 49 36 10. rn 3•43 10 3e •.S2 11 2.36 3.56 40 tool! 3.2T t'1 a. To so Ss It sots 3029 is at 3.14 i O D 4.07 as v c 11 1.96 75 13 2.53 3.00 11. as O. 2 •.1• 6.T6 .3.73 6.00 3.41 9.86 3.1s s:ls !." •.01 to T1 •.9t to 62. •.!e 2.40 •:07. 2.30 3069 11.20 3.7E 1.10 3.3e fall 30•.' 11.0. 3038 1.91 3.88 loot 3011 1.09 3.63 1.Ts 2.06 1.67 ' !a Tt A.S9 1.40 lost 2049 1.46 2.39. 1.41 2.30 1.34 2.2! 1.3! 2.1s late 2.69 1.24 2.02 1.14 1.99 1.09 1.70 1.03 1.60„ . :1e late .9. 1.53 .9e ' 1:46 .06 1.41 .03 1.3s .00 .1.31 SLOP[ a .S00 DURATION MINUTES FREQUENCT l• 100 T•EAe YEAR DURATION MINUTES FREQUENCY I6 100 TEAR YEAS DURAtIDN MINUTES. FREQUENCY t0 110 YEAR YEAR s 3.6s 5.40 S. 3.10 •.TO S •.19 6.76 6 3.30 4.91 6 2.44 4.30 6 3.99 6.00 7 3.03 •.si 1.' '1.64 4b.67. T 3.62 s.S6 0 2.62 4.24 • 11.47 3;61 Q 3.3s S.-Is 9 !a6• 3191 9 R.34 3.60 9 3.13 4.01 I@ &a 49 305 10. 2.22 3•43 10 2.04 •.S2 11 2.36 3.56 11 - tool! 3.2T t'1 a. To ♦.20 It sots 3029 is .2.64 3.14 It lots 4.07 13 2.16 3.23 11 1.96 3..62 13 2.53 3.00 11. 2.07 3.12 14 .1.09 2.92 146 2.42 3.72 1S 1.99 3.00 is' 10.3 2.02 is 2.32 3.50 16. 1.92. 2.N .16 . ' 1.77 to 73 16 t.24 3.44 .11 10 06 ' 2.841 11 1.72. 2.66 17 2.16 3.32 1• 1.64 2.71 10 1.60 2.30 10 2.09 3.22. 19 1075. 2.64 19 1.63 R.SR 19 2.03 3.12 20 1.70 2.56 20 1.59 2.46- 20 1.97 3.03 ti 1.61 2.63 22 1. SR. 2.3S t2 1.06 '2.06 t6 I . S• 2.3: 24 1.46 &.&S 24 I . T T 1.71 26 1.47 2.22 26 11.•0 2.17 24 1.49 2.69 to 1. •1 z.Ia t0' 1.36 2.�9 20' 1.62 .2.49 36 1.36 2.63 36 1.31 2.62 30' loss 2.39 32 1.31 1.96 32 1.27 t.04 ' 32 1. S0 2.30 34 1.27 1: 91 34' 1.211 1.00. 34 1.4S 2.22' 36 1.23 1.65 36 1.20 1.6S )t 1.40 2.15 30 1.26 1.06 36 1.17 1.01 30 1.36 2.69 •Q' 1.1.6 105 46 1.14 1.76 48 1.32 t.at •s 1.09 1.64 •S 1.00. 1.44 •S 1.23 1.69 s• 1.03 loss s0 1.03 lose s• - 1.16 Iota, ss ..9t 1.47 Ss .90 1'.'5'1' ' Ss 1.0e 1.N 60 .93 1.40 60 .94 1.4s.., 60 1.04 1.60 69 .09 1.36 AS .96 1'.40 6S .99 1.S3 70 as. 1.29. TO .07 1.3S T6 .9s 1.46 75 .O2 1.26 1S .04 1.39 1s .91 1.41 00 .79 1.26 00 .02. t.24 00 .60 1.3s as " .T1 1'.16 as .00 1.23 05 .0s 1031 SLOPE' • .sse I SLOPE • .460 f SLOP[ - ..s00 DURATION MINUTES FREQUENCY 19'. 100' YEAR YEAR S 3.23 4.94 6 2.96 4.53 T 2.Ts 4.21 l loss 3.K 0 2.44 3.73 10 2.32 3.SA 11 2.21. 3039 12 1.12 3.2s 13 2.04 3.13 14 1.97 3.02 is 1.91 2:9t 16 lots 2003 17 1.00 2.75 11 1.7s 2:67 19 1.T0 2.60 20 i.64 2.S4 22 1.59 2.43' 1. last 2.33 26 1.46 2.24 2e 1.41 2.16 30 1.37 2.09 32 1.33 2.03 34 1.29 1.97 36 lots 1.92 31 1.22 1.07 40 I019 1.0z •s 1013 : 1.72 SO_ 1.07 1.64 ss 1.62 1.56 60 .98 lose 65 .94 1.44 Ti '.91 1.39. .75. '. .6e 1'. 3s Q• .Os 1.31. as .e3 1.27 SLOPE • .489. 1 CE A F3 ' 1 LIMITATIONS: 100 I. Maximum length zz-1006, TC 1000 90 2. Maximum area :8 10 Acre• 90- 800 70. 700 LP 200 I .0 .2 *0 • 50 A 600 J E t 0 a Iva .500 0 i�j 20 35 10 10 a E 400 c 3,0 K A Good Cover 0 2 12 o r 350 25 u C 1.0 —0 b. Fair Cover. 0 300. LC 20 1 OR A- 3 d 1 14 5 2 0 & . 250 Sl0Hk /A Fe"W E do-ft — O Acrel I9 14 q C L, ' 10 200 - 13 20 C 12 25' ISO 9 KEY L-H -Tc -K —Tcl 01 EXAMPLE: E 7 (1) L -560 0 .H =5.0 K'= Single Family(1/4Ac.) Development , Te =12.6 min. 35 6 *0 (2) L =550'9'H =5.dj K a Commercial ID4"k*m*nt TC --'9.7 Min. 40 —5 AREA C.. Reference: Bibliography item ft 35. R C F C IS WCD �TIME. Of CONCENTRATION* HYDROLow MANUAL FOR INITIAL SUBAREA I RAINFALL INTENSITY -- INCHES PER HOUR. `< :"CONY VALLEY COMONA DESEMT Nor SPRINGS ELSINORE - NtLOONAM tA7M[D•AL CITY "Arta" FREQUENCY DwArtOM ro'cam -MCT OUMATION FREOUEIICT DUMATION MINUTES FREQUENCY Q kinATION p FREQUENCY A MINUTES MINUTES MINUTES l• 199 MINUTES I. 1e• 1. le• 1. TEAM 1.. YEAR l• TEAM 1•• TEAR TEAR TEA• YEAR TEAM TEAM TEAR `C f •.l4 6.76. 11 3.65 5.49 f ].1. 4.10 S 4.39 6.76 S 6 3.27 2..96 4. 9• 4..53 6 3.77 6.06 6 3.14 4.97 • 7 2.M 2.04 4.36 4.07 6 1 3.911 1.62 6.00 s.S6 7 2.75 4.21 `70 7 3.41 s.S4, 7 • 3.63 2.42 4.56 4.24 • 2.47 3.81 • 3.35 S.1S • 2.S• 3.95 Y f • 3.111 x.911 $.111 4.61 • 2.66 3.97 9 2.34 3.60 9 3.13 .4.61 9 2.44 Sari v l• 2.77 4.112 it 2.69 3.TS to 11 2.22 2.12 3.43 3.27 1. 11 2.94 2.1. 4.51 4.te 10' 11 2.32 2.21 3.54 3.39 C 11 t.bt 4.26 11 It 2.34 2.26 3.56 3.39 12 2.64 3.14 I2 2.4S 4.07 It 2:12 3.25 D 12 2.40 •o0r t) 2.16 3.2s 13 1.96 3.02 13 i.Si 3..• 13 2.04 3.13 2.39 3.98 2.61 3.12 14 1.89 2.92 14 2.42 3.72' 14 1.91 3.02 14 2. :0 1.72 14 111 2.1• 3.50 1s 1.99 3:40 is 16 1043 1.77 2.42 tar) is 16 2.12 2.24 ].S• 3.44 is 16 1.91 •1.011 .2.92 2.43 I• fall l.il 1.44. 16 1.9! 1.92 2.9. 2.•. 17 1.72 2.66 17 2.16 3.32 17 1.60 2.TS too& 3 1T to 1:46 2.11 1• 1.64 i.s. 1• 2.0.9 2.. ).2a 1• i.1S t.41 i • 1.91 ].2• 1.T5 2064 19 1.67 2.52 19 2.63 3.12 19 1.19 2.641 1• 1.01 3.12 10 t. 1. •f 7.6]' t., 1.7• 2.56 20' 22 I.S9 t.S! 2.46 t.3s 2. 22 t.9T 1. N 3.113 2.06 26 22 1.66 1.59 2.54_ t.43 to 1.7% l.06 tt 1.61 1.s4 .2.43- 2.32 26 1.46 t.ri !• 1.7T tart 2• last 2:]) t• 1:6T solo t* !6' 1.4T 2013 20 1.62 2.40 26 1.41 2.16 i6 .i0S9 2.6. 1.41 2017 to 1.)i l.01 to last 2.49 2• 30 1..36 2.OS 30 1.31 2.62 16 I.SS 2.39 30 1.37 2.09 is 1.46 1.41' 2.39 2.70 it 101 1.9 34 1.29 1.97 Z 32 )• 1.36 tai& 36 1.23 1091 1 1.65 24 36 1.27 1.20 1.96 1.611 34 .. 36 1.45 1..46 2.22 2.19 36 1.211 1.92 36 1.it .2-Is 36 3• 1.23 1.2. 1.h$ is 1.17 1.61 7. 1.')6 2.69 30 1.22 1.67 36 1.29 2.09 rn 1 1.24 PAR 46 1016 1.75 46 1.14. 1.76 40 4S 1.32 1.23 2.62 1.09 40 4S l.l• 1..13 1.42 1.72 ..�•e N 45 1.16 1.00. 4S 1.09 1.03 1.64 loss 4S s. 1.06 1.03 1." 1.56 S0 - l.la 1.18 S. 1.81 1.64 < W 5e 1.09 1.76 1.66 s. SS .109 1.47 ss .96 1.51 fs 10'69 1.66 sS 1.0= t.s6. Sf l.0) 60 .92 1:4• 60 .94 1..5 60 1.0•. 1066.. 60 090 1.50 M 6e .98 - lobe ' 0 6S .94 loss AS .89 1.34 6s .98 1.40 6S TO . N 1.53 1.46 6S. T.. . N .91 1.44 1039 0 D To .99 1.46 T. .6S 1.29 1.2• To 73 .87 .04 1.3s 1.30 .. TS .9S .91 1.41 Ts .•• 1.35 (� C m 7S 066 1.41 7s .oz. 1.29 Be .62 1.26 66 . elk 1.35 of as 1.31 •• .63 1035 •• as .T• 1.16 as .44 1.23 •s .eS 1031 •S .43 1027 D •S .8•, 1.31 0T7 SLOPE - ass. SLOPE • ..409 SLOE • .500 SLOPE • .4•* 0 SLO P • .Se. Z I • '" " CONSULTANTS, INC.' Consultants to Govemmental Agencies I Lh ATT N : _0C. Via: ❑ Messenger ❑ Express F„ Pickup ❑ Mail We are forwarding herewith: Originals - � o. pies Prints Plans Description: ❑ Blueprinter ❑ Other Date: '4418y BSI Job No. ef:L?0 )?-70 Project: �'3 eG9 Report Specifications Drawings Other This material is: ❑ For your approval. ❑ For your review. ❑ For your files. O Per your request. ❑ Approved by us. C, Returned by us. ❑ For use on job. Remarks: _'�F�i4sel_1 From: BSI CONSULTANTS, INC. Copies to:FiCGrY Received by: It enclosures received are not as listed above, notify us at once. Rancho Mirage. California 92270 09 -71U Hi�,_livay I 11, Suite. '_'05 (619) 323 -1 l 11 N 0 250 Te LIMITATIONS: Sh�ie Fort a v' Ko0 I. MsxlWAM IMgth s 1000' TC K?00 C .90' 2. Moeimom ono a 10 Acri• S 900 90 200 a 13 20 i _.`� Soo 70 b .. ... 11 Y 700 60 F too 7 C BOO s E ' wo o o e 500 ,� 20 f�} • 9 o j Qh.1.5� 10 �. K AL e 400 30 tJnde Good 0 330. 26 .Corer i,o tFoir � Corer c � a 300 x • 20d Poor aMY O .3 2 0 250 v I g 18' 17 Sh�ie Fort IT v' 16 IS C 200 a 13 20 -- _.`� 12 14. 11 el .100 1 O 7 6 5 -- 4 R C F C HYDROLOGY MANUAL 25 u KEY L-H -Tc -K -Tc 30 XAM :' E (1) L 8' 550" H = 5.0; K.= Singie Fondly (1'/4 Ac.) 35 Dw*lopme d k s 12.6 min. (2) L a 550', H =5.6, K a Comivwciol 40 Oevelopoant , Tc * 9.7 inin. A A Reference :8ibiiogrophy i4m No. 35.. �..' TINE OF COINCENTRATION ■I/ sI F's $AN an 1 , _ %�F i Te 100 LIMITATIONS: 1000 90 I. MoxiR►wn 1 0"t h s 10001 2, hkxiftm. Tc 900 00 ono .• 10 Acraio . 70 u H Too 60 g tr 300 4w „ 200 O 7 ►- • Soo � SO N c X00 c o' E 500 a: 0- 0) o ;8 0 to 9 0 Y 3s a ,o .. 4 00 30. • o to • d1, S.co = E e .aJ. Uwdw01oMo4 (/) 0 O 350 25 Good Cowt 2. 12 _ E V�fifr�� _�' i.o Foir Corot . .. ' a 300 - 20 unrow O.-A :1 o` F 1 y Poor' GMOt . 0 •3 2 250 :... 12 17 ,2 s Fa it .. 1 T� 161 s 17 b c ob 200 c 14 13. co�.,a c . s g 20. . .� 160 O KEY 23 3 i~ L�"q-Tc -K •Tc' e XAM 30 • 7 .H =3.0; K= SinQlo Fomllr(1 /4 Ac.) 0+�►MopmaN 9.Tc a 12.6 inin. 33 E ~ d I 100 (2) L =350'; H r-5 0' � K s Comwnlrcial Cowlo wt S Tc z'9.'? inin. 40 A 4 Rfhhnc2: BiDIi00ro0, imm f 3S. III WC-D, LRCFC YDROLOGY MANUAL TIME OF •CONCENTRATION FOR INITIAL - r� i VJ L" l9 !?, L' .l'/ - R Dom' /moo _ T R C FC k w C J-1 L% AL �� Na. fio?g �� L&�eolf RATIONAL METH00 CAL 4 " "' CALCULATION FORM �fl� CJ.V�L �, D PROJECT �z�acr Ne. 2329 8..! \pf CA1�F�E. FREQUENCY _.Yr__ Cbtcted by •aj � -- -= m4Rr li'�'' DRAINAGE AREA SNt • Davabgodnrt A Ams- 1. M /lit C A-0 c F s Z O CF5 ION u FPS L FT. T WIN. E T REMARKS wT A&. R , L- 800 d 7• c, - 1 A - C.F '/4 4.7. 3.59 .'1o5 I I.9 14.9 11 9 -os •.�D $rot. •sdc 2•s 450 3.p A- 2 A- S.c. Y4 ¢.� 3a3 •�9. to.? t,. 22•' � � ,009 � � 3.0 340 ,, 9 A-3 •F Ya 3.'( 3.05 •s685 7-1 n'd - 0.49 •oF etc-.. '50.3 .0�5 �e'•sF� 4• 14io 5• - F V4 18.2 2:63 (07 32.1 Z5.5 d a o-49 b -cF aw. t A -5,F 1l4 C. 3.43 •70 15•t tom•t '"T'� ` � t 4.1 :005 << 40•s.�i Z-`5 4oe Z •4 . py -L A =S.F. y4 3.4 .3.t2 .64 Z•3 &•''e.F. eK Z24 .Dos s off- •sect 2.5 )bo I,Z 15 3 A - Y4 3.Z 3.0( ,`�s. lo.� dF o•�/ to" cK 2 .p .oZ �{.g '3 10 8 -4 a -S.Fy4 4•0 Z9 •�8 7.4 Zt•3. d= o.4g "ct< eta -3-(..g -oz '� 4•3 'S°° t'2 -S A�.s•F Y4 4.4 2.83 - (6?S g.4 22.5 d� 0.49 (. °cF• efc. 4'5.3 &o.7 •oZ .ors EcT. " 5•o 5.0 Zoo 32o D 9 1.1 A -5•F. Q Y 3 7 2• S •(07 5 t 5.4 23.4 d = o.S✓ G' ctF 9Dt�••j- 0 -'7 A- .S•F Y4 O.a Z. t:9 (61 1.4 24.5 d 0-27 4"cF o. d- o- 58 ' 0f it �Z ( G"Gf eK. >la as A -4 - B-7 Pr cc 0-1d am u�i 25.5' 6241 &Z.1 �t'6 124.5 .0/7 40' 7.03 0•;� - 5 A _ S.F. tl4 !. 8 2.60 p.67 32 2b.o d c 4 :7a'Mar. b cF 1�K'' �Z7 7 5F V4 S 3.2 •to415 .4.Z' fl•'� wT�n� g2EP. ,G h= b-0 ' Y.2 0043 Sf+•�e.+ 9tc'SE -s. 2.0 . � iooc $•3 G- 2 A- 5 F `/. 3.05 2. •2 .67 5.4 z5.(o d o.3,s q.t:v .oteb sk�f� 2.5 Il�5g' 11•.1 G� 3 A- g F `i4 1.45 2.13 •65S 2.p 31v.% (I•(o d= O.55 G "tF t�K- �1 1i t) oc cr_ W^ �.L (n. W U Z U) ) z W Z. J z 1L f 7 a a J i V Q O I N W R V • v N 0 V t t • • ` w W > V I ♦ n n ♦ � .� n •.. ti n N r'e. ♦ nn ♦• • n w w. +- •.. N r s e r r'r. - •/�AT� nnMrP aB••• NtAN�. P•f ►� @r ♦r r, Donn H' t t t An 0. 0. N NN •MANN N N A ••_•.. .�.•.� n. r ..�.+r ►.' A /• •♦ N •• N f N N• M• •� N� w t A♦ MN • A A N i • M n N�hN♦ ANw•► !••AA •MN1• AANNN rr•�! St••.• RINNNN IV N•11•tlr wrrrr rrrrw rwwrr rrwr• MIA • ! • r N A • 040-00 • N • • • • N • • • • N o N.•, 1n o N • N rrwaw 'r rr r.w .♦11 N R1 NM, AAAAA ••NN• IAAi• • • • `V O M My 2 .2 sw YI r ! 1i./ N tr•• V ^ 4 I > .J O i •1 r M + > ss A •y- 4 = r o S ^• • • • • •• N N♦ 1Ny NN A�• «•Ar • • • • AAA A N•�" •! M N o •N- v • w • • • I A A Sf•••N• • • • • • N NNN N ••'•NA ♦ rr w rr • N NN.r • A A A,M A M�.•r•• • • ,N N M N N M•h•• rr w rr •• h •,• A N M N N •• ►•• • • • • • •N I •• NNNNN, 14 A A N •• N N N ft-ft MN11X • • • •• •Nf •• AAAAA •• r-'i • N r w .+ .•+ pNw:• • • • • • • •N• N• f f NN.'< h f f •„'1 A ... -... w .• Z.�1•• • • • • ► NohoN �R �• r • • ' • V IL a M A A N r• k ••A i Ah • NN NM ••N •h.•Nr1 .,o IA '•A NS•N•+ • • ir�1 •N• •MI wrrrr 1 • •. Y • W ►R1•M• r • • • •Nri! • • .+• • ! •• • • • • • h •N N 1„ • • • • • ♦AANN •• 2 w> •• A A• N M N• N• N• N N NM N M h M! • •••1•rr h••�N r+••!! rrwrr • ♦ •rA• !!••• Mi • NNNNN MMMrw W t •t •h4 "Wow S• - 04 hN•11% •hA '•A A .A.•AN AN t ••• A •!• A N•• • • < t 04 . i �• • • •' M • • • '00 • • NNN • Ni• w • •• .• •• .i!• ! • •♦ •• ♦ • • N S N.N NNrw ✓rrrr r'rwwr ✓rrrr rrw • go N lN•• w•r•Npq 4 di 4P. a.!i •N M• •A •'A oM N•AoN M �s •+ NNf NN A A • t .!h •A �1• Al N • ••w♦ r,M N.Nn M• �N•• • N ♦RN A• ;r •• !N• • • • • • • • • • ♦ • • N1• N• • r••M > ✓• 1 1• A• • 1 ASRI A AA NNNN NNNNN Nw rrr wrrrr wrrrw N W • J W' f M • A N 1 ! • M • A • M • • N • r • h r. < A A • • ! A • Al,N N ! h ~ ' J l' • • 0040400 • A N r • • ! • • h h • N • • A A N N N 'r • • ! ! • • • A A i ► MARINM NNNNN ,r rwwr' wrr.+r wrrrw rrr � M r Y_ h•! "OR N• A•• M••• N (� s7 M i • w 4 rww r.r ,,..rrrr o MMNMM o NA• AA• •A • • N• N• N• N• N > • f V • W rA r • J M r b, < > t ! S M � A H I I is i •• •M•'• N•h �N •NNN A•M�! •• ✓111 •' N! •• • Ad rN.r A� M w• M M•• h� • M r •• h•♦ A A N r• •• A•• N f• A A ••Mp1 4f ••AM.�A1,11 R1AA AMMNN NNNNN. Mr+wrw wrrrr • • •f1rMMM rh•w• h M! • •••1•rr h••�N r+••!! •1NA•N h•NN <... .•M• IMAM f r! A• Nr••♦ ♦ •rA• !!••• Mi IRIAAN NNNNN MMMrw rrr•rw rrrwr rrrr � M •h•! wr�•Arr r�wnir MNNMM N AAAA� • • N N• CAIN►•• . RCFC 6 WCO HYDROLOGY MANUAL STANDARD INTENSITY — 'DURATION CURVES DATA i ti 1 Q N 1 OLATE 0-4.1 (2 of 6) or = M Q RAINFALL INTENSITY- - INCHES PER' HOUR CATHEDRAL CITY CT1[RRY I1ALL11 CORONA ` DESERT NOT SPR1P45 ELSINORE - NILOO"AR. DURATION fR[AU[NCY DURATION M(NUt[s MINUTES 10 . its Y[aR YEAR t4 rc t0 • ]6 3t s -i 7 s n : C 0 10 11 r 1t 1) .0 14 Cie, is 1 "a 1T f0 D. m 10 AS 61 As TS 26 t4 rc t0 • ]6 3t 4.14 a.7a 3. T3 4.0• 3.41 s. s♦ 3. Is s.ls !.K 4.61 I. TT 4 :fit 4.at 4.26 1. At •.07 2:)a :.. 2.1• D.sO till 3.44 t.a. 3.32 1.•T 3.19 . 1.01 3.12 1.05 3 93 I.TS 2.04 I.aT t.Tr 4.00 2.40 I.S2 t.40 . 1.44 2.3• 1.41 r.30 1.14 I.tt 1.32 2.15 1.2A 2.0+ 1.24 . 2.02. 1.16 1.A+ 1:0• 1.16 1.03 1:60 .•6 1.60 ;•4 1.53 0.0 1.44 .A6 1.A1 061 1.35 .86 - .1.31 . Z 3• 3a >a Z .. �.� SLOPE w .SAO s ,4 T • t• 11 - Lt is 14 is la Ilk i! t0 22 14 Ia Re ]6 34 36 36 46 45 So ss 00 6s To Ts. so as /R[6UCMCY 10 166 T[an YIaR s.4s s.•+ 3.30 4.•T 3.03 4.S4 . 1.61 . 4.t4' 1.64 3.•T =.4• a.Ts i.)6 a.sa •. l.6T 3.12 l.•t 3.00 1.66 I.Aa l.60 2011 1.75 . 2.a• 1. TO 2.56 1.41 t.•3 1.s4 t.]r 1041 r:t2 1.41 2.13 1.36 2.AS 1.11 1.•6 1.21 1. +1 1.23' 1.95 1.20 I.so I.la . 1015 1.49 1.64 1.03 1.SS . +s 1.47 .a+ l.s• .as 1.20 '.02 1.24 .Ta 1:20 .TT 1.16 SLOE ■ .556 DURATION 1sIMUT[s .• D -i o` s 3.10 a.TA S •.)• 6. TA .0 2.04 4.30 rn J. D. m AS 61 As TS O T D r a as 4.14 a.7a 3. T3 4.0• 3.41 s. s♦ 3. Is s.ls !.K 4.61 I. TT 4 :fit 4.at 4.26 1. At •.07 2:)a :.. 2.1• D.sO till 3.44 t.a. 3.32 1.•T 3.19 . 1.01 3.12 1.05 3 93 I.TS 2.04 I.aT t.Tr 4.00 2.40 I.S2 t.40 . 1.44 2.3• 1.41 r.30 1.14 I.tt 1.32 2.15 1.2A 2.0+ 1.24 . 2.02. 1.16 1.A+ 1:0• 1.16 1.03 1:60 .•6 1.60 ;•4 1.53 0.0 1.44 .A6 1.A1 061 1.35 .86 - .1.31 . Z 3• 3a >a Z .. �.� SLOPE w .SAO s ,4 T • t• 11 - Lt is 14 is la Ilk i! t0 22 14 Ia Re ]6 34 36 36 46 45 So ss 00 6s To Ts. so as /R[6UCMCY 10 166 T[an YIaR s.4s s.•+ 3.30 4.•T 3.03 4.S4 . 1.61 . 4.t4' 1.64 3.•T =.4• a.Ts i.)6 a.sa •. l.6T 3.12 l.•t 3.00 1.66 I.Aa l.60 2011 1.75 . 2.a• 1. TO 2.56 1.41 t.•3 1.s4 t.]r 1041 r:t2 1.41 2.13 1.36 2.AS 1.11 1.•6 1.21 1. +1 1.23' 1.95 1.20 I.so I.la . 1015 1.49 1.64 1.03 1.SS . +s 1.47 .a+ l.s• .as 1.20 '.02 1.24 .Ta 1:20 .TT 1.16 SLOE ■ .556 DURATION 1sIMUT[s .• D -i o` s 3.10 a.TA S •.)• 6. TA .0 2.04 4.30 ♦ Z N 7 l.64 O T 3.A2 r a 1.0 Cf s 3.3S' 4.14 a.7a 3. T3 4.0• 3.41 s. s♦ 3. Is s.ls !.K 4.61 I. TT 4 :fit 4.at 4.26 1. At •.07 2:)a :.. 2.1• D.sO till 3.44 t.a. 3.32 1.•T 3.19 . 1.01 3.12 1.05 3 93 I.TS 2.04 I.aT t.Tr 4.00 2.40 I.S2 t.40 . 1.44 2.3• 1.41 r.30 1.14 I.tt 1.32 2.15 1.2A 2.0+ 1.24 . 2.02. 1.16 1.A+ 1:0• 1.16 1.03 1:60 .•6 1.60 ;•4 1.53 0.0 1.44 .A6 1.A1 061 1.35 .86 - .1.31 . Z 3• 3a >a Z .. �.� SLOPE w .SAO s ,4 T • t• 11 - Lt is 14 is la Ilk i! t0 22 14 Ia Re ]6 34 36 36 46 45 So ss 00 6s To Ts. so as /R[6UCMCY 10 166 T[an YIaR s.4s s.•+ 3.30 4.•T 3.03 4.S4 . 1.61 . 4.t4' 1.64 3.•T =.4• a.Ts i.)6 a.sa •. l.6T 3.12 l.•t 3.00 1.66 I.Aa l.60 2011 1.75 . 2.a• 1. TO 2.56 1.41 t.•3 1.s4 t.]r 1041 r:t2 1.41 2.13 1.36 2.AS 1.11 1.•6 1.21 1. +1 1.23' 1.95 1.20 I.so I.la . 1015 1.49 1.64 1.03 1.SS . +s 1.47 .a+ l.s• .as 1.20 '.02 1.24 .Ta 1:20 .TT 1.16 SLOE ■ .556 DURATION 1sIMUT[s .• FRESUENCY 10 Las TEAR YEAR DURATION MINUTES fRE6U[NCT 1. 1s4 YEAR Y[AR s 3.10 a.TA S •.)• 6. TA a. 2.04 4.30 ♦ 3.s3 4.ss 7 l.64 •.st T 3.A2 S.Ss a 1.0 3.01 s 3.3S' 3-13 • !.>N 3.00 ♦ 3.13 4.01 l6 2. t2 3.43 Is 8. +4 4.st 11 2.12 3.21 it Z.T• 4.rs 12 2.64 3.14 Ir 2.4s •:SY 13 l.+♦ - 3.01 1) t.5) 3.66 14 3.0 +' 2• +2 14 2.4t 3012 IS 1.03 t -02 1S 2.)z 3.s0 16 I.TT 20.13 ]i Lr4 3.•4 IT l.TZ 2 -44. 17 . 2.16 ).)2 10 1:64 1-so i0 1.34 60 19 1.63 2.S2 11 1.44 TO to 1:1+ !•44 2a' 1. +7 ).0) 22 l.st 2.3s 22 1.06 2.66 24 1.46 2 -n t4. 1.TY r.Tr ra 1.400 2.17 24 1.6'+ 2:61 2A 1.36 ! -0• 24 I.42 2.4+ . 34 1.31 2.02 30 I.SS t.)+ 32 1421 1.04 32 I.ss r.30 346 1.23 1.196 34 1.4S r.zt 36 I.i+ 1.6s 36 1.40 z.IS 34 I.tT 1.01 )6 I.]4 t.0• ♦0 1.14 1.14 At 1.32 2.01 4S 1.00 1.66 45 1.23 1.0+ 36 1.03 1.S6 So 1'.14 I.TO SS .•A I.S1, sS 1.0+ at 40 1, -0• 1.40 as .00 1.40 AS .09+ 1.S3 Ys ./T 1.35 To .t5 1.44 TS .04 1.30 TS .91 1:41. . so .62 1.24 so .60 1.33 as .00 1.1 as .65 1.31' SLOPE ■ 04A0 1 SLOPE ■ .SAO OURaT1004 fR[pU[NC� MINUTES Is Ise YEAR TEam SLOPE . .460 4.4. 4 t.+A 4.53 7 2.75 •.rI [.so ).9S :.�. ).73 to I.)i 3.34, 11 2.t1 3.3• Ii 2.ir 1.zs \ 13 t.o• 7017 14 iS { : +l t•�r 16 I.OS r.•4) 1T 10 l;iS r.Ai 20 1.66 r.s• !z 1.54 ? -•� i0 1.St 7•» ie 1.46 r.Z4 20 1.41 7.14 30 1.37 s.eo lz 1.33 r.0) 34 1.1+ i.,07 36 1. n I.4r )6 1.21 1001 40 1.19 t: +r 45 1.13 1. ?z s0 1.07 '1 .A4 SS I.sr 1.34 60 .+0 1.54. as .94 1.44 TO .ti 1.39 TS .so 1.73 so ..OS 1.31 as .a) 1.rT SLOPE . .460 I IV r -�1 i N RAINFALL INTENSITY - -INCHES PER. HOUR �. �► DESERT NOT SPRINGS ELSINORE - rIIDDvAR "< CATHEDRAL CITY CHERRY VALLEY CORONA lIM1T ON 1 FREQUENCY O11R'4TIOM' PRE61Y[NCT' OYR4TIM IREttKNCY DURATION FREQUENCY DURATION MINUTES . FR[OUCyC1 MINUTES MINUTE! MINUTES MINUTES 10 l0• I! lte 5 11 l00 l0 16! 16 to YEAR TEAR TEAR YEAR _ TEAR YEAR YEAR YEAR X41. TEAR. oc s ' 3. {6 4. TO 9 •.)� 4.76 S )oil •... S 4.14 6.76 9 3.65 f.49 6 ). K 6.01 6 i.f4 •.$) `�' • 3.73 6.96 6 3.30 4otY 6 1 2.04 1.64 •.!• 4.0T 7 t.Y1 4.t1 T 3.41 5.16 T 100! 4.56 t 2.4T l.tl • ].]S S. S •• 2.SO ).1S .7►. • 3.15 0.13 i P.tt 4.24 9 3.I3 4:t1 9' i.4r 2.73 !•9f •.t3 • ' 2oi4 3.91 •. 2.34 !.6• 7 I• 2.71 •.s2 10 2.49 3.75 It 2.22 3.47 lo' 2.94 2.70 4.52 4.t4 it 11 2.11 2.21, 1.54 3.39 0 I1' 2.62 4'.i6 11 2.36 $.56 I1 2.12 3.IY Ii 12 2.45 4.64 11 2..{2 1C r It 2.49 4.47 It 2..25. 3.39 12 2.04 3.14. 14 2.5) 3-T 14 2.6, 1 �. ; i 13 2.38 Jose ' 13 2.16 3.ts 13 t.« 3.92 14 2.42 3.Tt 14 16 2.20 1.71 14 2.67 3.12 14 1.•9 2.92 is 2.19 '3.118 I5 1.99 3.0! 1s to t.Az is 1.32 2,24 3.50 ]•44' is 1.91. Z.92 16 2.11 2.44 16 1.92 2.90 la 1.77 2.73 16 17 2.14 3.32 j i,ii 2.7s IT 2.04 11.32 IT l.os 2000 17 I.TZ 2.44 Is 2.69' 3.2z 10 1.75 Y.67 It D.97 Doti' l0 1.00 2..11 16 1.44 t.S4 19 2.41 Jolt 19 Pole tote 1• 1.93 3.12 19 I.TS 2.64 19 1.63 2.52 to 3.03 3.13 to 1.70 2.56 t4 lost' 2.•46 20 1.9T 1.04 3.03 to" to 22 1.66 .1.59 Z.S4 2.43 it 1.75 2.66 at 1.61 2 ►43 2z lost 2.35 tz 24 1.71 toTt 24 lost z.33 t4 1.•T 2.Tt 24 1.54 t.32 24 1.K tots to 1.69 t.44 t4 1.44 t.i4 TL a tS i.S �•fL to 1.47 2.22 a6: 20 1.40 1,36 2.17 2.69 to lost 2.49 t• t.41 tole • lost t.49 to 1.41 2.1.3 30 1046 1.39 39 1.36 2.05 ]! 1.3I lots 30 loss I..50 to" 2.]!_ 30 W 1.3T 1.33 2.69 2.03 32 1.41 2.30' 32 1.31 1.90 32 1.27 1.94 ]z 34 I.�S 2.22 34 1.29 1.97 34 1.36 2.tt 34 1.27 1.91 N 1:t3 .1:9! 34 1.40 2:IS 34 I.ri 1.92 36 1.32 2.IS )6 1.23 1:•s 34 1.20 1.17 1 40S 1.•I 3t 1.36 2.09 3a' 1,22 1.67 36 lots 2.09 34 lots 1.00 10 ^ m 1.24 2.92 40 lots 1.75 40 1.1� 1.76 40 4S 1.32 I.t3 1.02 1.99 40. 45 1.19 1 -1) 1.62 1.72 N 4S 1.14 1.t9 ' As loot .'1.64 4S 1.00 1:03 1.K so 1.16 I.TO se 1'67 f.o4 D f! ss 1.01 1.03 1.70 1.66 SO ss 1.13 .9s I.SS 1.4? S• as .90 t.so I.SI SS 1.44 1.60 ss l.tr lose 60 ...: 1.45 60 1.04 ot♦ � rn 66 .,. 1.60 66 093 1.40 1- 1 ! iS •N 1.53. as .69 1.34 65 •90 1.40 6S TO ..9 I.S]' as T4 .94 .91 '1.39 Q . D To •t0 .1.46 TO .tS 1.29 70 OT J.2S T5' .95 .91 .1.46 1.41 7S o06 1.35 (� C m TS 006 1.41 7S -t2 - 1.24 TS .ts 1.]0 t0 .88 o!• .45 1.31 O of .63 1.35 •! -T9' 1.20 •0 .tz 1.26 1•23 •S as 1.31 as .03 1.27 D D •S .09 1.31 as .77 1.16 as •t4 SLOPE -Ste SLOPE • .46e 0 SLOPE s '4st0 SLOPE r .550 SLOPE .. o4t0 �4 RCFC A WCD HYDROLOGY MANUAL 1 AREA c Rahrawm -9ibliogrophy i*h Noy 35. TIME OF CONCENTRATION FOR INITIAL 'SUBAREA -- i 1°00 TC, 90 LIMITATIONS: 1. Maxiowf". lanpth s 1000 2. A4oxi6wm orao i 10 Aoss TC 5 9 90 e V eoo.► U Too so LF �, Soo - Zoo t cc i c s N •` .6 E 7 . E 600 1-50 a. 300 0 L� io 9 0 Y 35 g d �� 4h. (0..03' 10 E r K .! 400 c .. 30 lH+davala�N (I ° ., Good Cover 2 12 c 1 ° 350 25 U�Iev e�N 1.0 .E Foir yo Cover ;a 300 _ _ 14 c A u 0. :? Z IS r E o 250 Id F (1/4. Ac c .^J. C .15 14 Com�areio E 19 2 ,.. ~ J 200 13 ° 9 EY LAN -Tc— ' Tc �_ • 30 .. ° XAM E 7 (1) La550', .H =5.0; K= Singis Fo�nily(1 /4 Ac.) ~ Devabpment ,'k s i2.6 min. 35 100 (2) L=S50', H =S.O','K s Como+arcio1 40 Dovalop�+ent , Tc s 9.7 inin. �4 RCFC A WCD HYDROLOGY MANUAL 1 AREA c Rahrawm -9ibliogrophy i*h Noy 35. TIME OF CONCENTRATION FOR INITIAL 'SUBAREA -- (9 10 Z) 1'* -.1 31rld, . I •V VIVO S3n8n3 Wlm.nO - AIISN31Ni 08VONVIS ft 0 O 1 F A M K I H t rs A V ' 8 pA i H M.• N a w Q _D Z D r Z m Z' r (f) m 0 A f.f j a r r 00-4•4• 00VV• N O M O ♦MM ♦++ d ��/• yyyy4 NNMNM rrrrr rrrrr C► �p �� . 0 0 V-4 1 • N N!! 4 4 w y Y M M M h M r rrr r r rrr r / 0 .•'0 M C � NOM•V ONOM• •P•NO O•••NO .00.•V P,M l4Mr0 /0V ♦'7/ r•.• N MZ . ^.~i � _D r r r r rrr r r r rr r r rrr r r r M h 111 N M M M Y R N N M N N N N M N N 4 4 y Y• rrr rrrrr rrrrr r 00VV♦ OMM!♦ yy YYY NNMMM rr rr'rr4rr 4O• -4t YM4 '�f YEN VY r V1i MOH1 iH10N0 `�1hf fPlh• /0 1•M ♦YNrO 10V00 !! 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R N N N N M w w w w w w!! f M R r ._ • • • • • O ••• 0 4 4 • • • • • • • • • • v • • • . • • • • OyMO.` i41••� �h�•!•= N� ' ✓V �'r !•NP V' sM••Y • rN4l 111 0 N •NMI! f• V 1P 10/1 • 10�ti•+• OV••• ON A0 •ree0 w -400-44 ■ C O rrrr r r r r r: h M h M M N N M M w w w w w Y Y Y! ** 00000 ^ • • • • • r H1— P y • ♦ • • • O • ♦ • •yy• 0 '• • • • •• • •yy• •MM • • • • • • • •MM• • 1-• f1 •4 00 4 N 4 MN i ow IO *w N IM11 h: • h -40h —0 00 00 ft 0 O 1 F A M K I H t rs A V ' 8 pA i H M.• N a w Q _D Z D r Z m Z' r (f) m 0 A f.f a r r 00-4•4• 00VV• N O M O ♦MM ♦++ d ��/• yyyy4 NNMNM rrrrr rrrrr C► �p �� . 0 0 V-4 1 • N N!! 4 4 w y Y M M M h M r rrr r r rrr r / 0 .•'0 M C � NOM•V ONOM• •P•NO O•••NO .00.•V P,M l4Mr0 /0V ♦'7/ r•.• MZ . ^.~i � r r r r rrr r r r rr r r rrr r r r M h 111 N M M M Y R N N M N N N N M N N 4 4 y Y• rrr rrrrr rrrrr rrrrr MN11•MM MM.YYY t .1 • N r N ♦ p y e 4 N: .`I� 4O• -4t YM4 efrN4' YEN VY tPrOe y0Z.O •uP -41 ••4► 4 f • i V V• 0 I I I O r N M N Y y !! 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V V N 0 O V r .1 • N r N ♦ p y e 4 • O e r .. rrNN NNMNN NNNNN ylr4yy 4N ♦!! �••' 2 NNyy • M V P -40 01/00 rN'y!M 1�P V01 •I• N I•"r• V Ih 1/1 H^' V O • • P t NN 1H y1 P • ww • V N O .• V -•N'• ft 0 O 1 F A M K I H t rs A V ' 8 pA i H M.• N a w Q _D Z D r Z m Z' r (f) m 0 A f.f A. A 1 t 7 O O 1 (� f Z -7 d37)v s Z n A r -RAINFALL INTENSITY- INCHES ..PER HOUR CATHEDRAL CITY C CN[RRT V VALLEY C CORONA D DESERT NOT s►RIM65 E ELSINORE - - t1ILOOMAR puiiaTla+ ► ►RfsuENCY D D1MATtOM / /Ri0u[•CT O Z /R[euEwC, D DURATION i iRLOUiNCY, D U N MINUTE! M m � MINUTes M MINUTE! .. M D MINUTES M Is 1 100 , 10 I 0.c x m to t too I D � O �[:R S 4 4.14 6 6076 S S 3 O S.a* S + 3.10 4 4-10 S S 4 4.30 6 6.76 s Z 3.23 4 N 6 3 3.73 6 6.66 6 0 3.31 4 4.07 6 6 2 2.44 6 6.34 6 6 3 3.9% 6 -RAINFALL INTENSITY- INCHES ..PER HOUR CATHEDRAL CITY C CN[RRT V VALLEY C CORONA D DESERT NOT s►RIM65 E ELSINORE - - t1ILOOMAR puiiaTla+ ► ►RfsuENCY D D1MATtOM / /Ri0u[•CT O OURAT[eM / /R[euEwC, D DURATION i iRLOUiNCY, D DURATION f fR[OUEMCT MINUTE! M MINUTes M MINUTE! .. M MINUTES M Is 1 100 , 10 I I6 *. I Is 1 1N t to t too I YEAR Y YEAR ,[:R � �[:R S 4 4.14 6 6076 S S 3 3065 S S.a* S S 3 3.10 4 4-10 S S 4 4.30 6 6.76 s s 3 3.23 4 4.94 6 3 3.73 6 6.66 6 6 3 3.31 4 4.07 6 6 2 2.44 6 6.34 6 6 3 3.9% 6 6.60 6 I. 1 10S' 4 4.111 T 3 3.61 s s.s6 T T 3 3073 4 4.56' T T Z Z.64 4 4.07 T 6 3 3.35 S S.1S a a 2 2.s• 3 3." �. 3 3.IS O O.IS s s t to at 4 4.2a s s 2 2.34 3 3:66 s s 3 3.13 • •.01 • • 2 2.44 3 3.13 0 1 1.06 ' • 1 10 2 2.11 • •.it 1 10 2 2:49 3 3.75 1 10 r r.it 3 3.43 1 10 t to 96 . .•.S2 1 1• 2 2.32 3 3.S4 1l l lost • •0114 1 11 2 2.')6 ] ].S6 1 11 r r.12 3 3.27 1 1/ 2 2.Te • •.te 1 11 2 2.11 3 3.25 It 2 2.49 4 4067 i it t tots 3 3.30 1 12 9 9.64 3 3.14 1 13' 2 2. 3 3.06 1 17 . .0• 3 3.13 13 2 2.34 3 3.40 1 13 Z 2.07 3 3.12 1 14 1 1.00 2 2.911 I I• t tir :t ) ).72 1 1• 1 1 I.07 3 3.0! is 2 2'.10 J Jose 1 1s 1 1.00 3 3.i1 1 1S 1 1.63 t t.ss i is 2 2.32 3 3.54 I IS 1 1-9,1 2 2.02 16 t t.li 3 3.44 1 16 1 1. *2 1 1.76 1 16 I I.TT 2 2.73 1 16 f for *. 3 3.•• 1 17 1 1.60 Z Z.1s tt .. Z Z.6• J J.3r 1 11 1 1.96 2 2.00 1 11 1 1011 2 2.K I is 2 2.00 3 3.22 i is I I.TS l l.aT 10 1 1.07 3 3.111 i is t toot 1 11.71 I 10 1 1.63 t t.S2 1 10 1 1.63 3 3.12 1 10 1 1.79 2 2:60 t0 l loss 3 3.03 2 26 1 1.70 2 2.56 2 26 1 1.s*• 2 2•46 2 20. 1 1.0T 3 3.03 t t1 1 1.66 r r.S• If W WS 2 2.66 1 12 1 1.61 2 2.43 2 22 1 1.52 2 2.3s 2 22 1 t.TT f for& r r• l lose 2 2.33 25 4 4.50 2 2.66 r r6 1 1..41 Z Z.ZZ t to; ' '1.48 t to 17 r rt 1 1.60 2 2.66 2 26 1 1.46 t 2.16 to 1 1.52 t to 1 1.61 4 4.13 t to 1 1.36 1 1.60 t to i i.62 1 110.0 1 1 i 30' I I.a6 2 2.30 3 30 1 1.36 2 2.65 ' '36 1 1031 r r.sr 3 36 l loss 1 1.30 3 3e 1 1.37 2 2.N )! 1.41 Z Z. SO ] ]! 1 1.31 1 1.06 > >Z 1 1.27 1 1.96 3 32 1 1.65 2 2.22 3 3• 1 1:10 l l.tT )• 1 1.36 t tote 3 3• 1 1.117 I I.01 3 A )ZEA G -2 - r)e4 e- • KWL ASSWATES, lip 712 Eugene Road SHEET NO, OF PALM SPRINGS, CALIFORNIA 92264 (619) 327-77.86. CALCULATED BY DATE CHECKED BY DATE II Y02 0 67,C,4,010" SCALE '41 7-,e ,E_,5- opck) 7" 'IV 14 00 .7, 'Al C,04-A 14 4w 57?,Z.4&e Aleo IR44 467 12 %,05(0 6.8-140 4,- 2,3 ic3S 5, 04. -/,9" e(o Le, 91 a7. .7 zq, 9b4..._.. 217,645 4, 2�O 7_, - ---- L96/ ---- 36, Z,? 49, 743 :6 (10 06 /0 9 -17407 64, ro Vj A I 261, Z- 2.7 13 /j 49 Zoe 9#5 0� I. i� 41 Z4. B i . es 9, 93 60 27 15" 17 la" 4 /,d 1*468- zz 1•71 IYZI 050, -5' 4, 1,3 IZ610 —4- - 76's 97 '7 leq �---J—J- J. e�)' 1:2,1 ',",4' 4%� -2): Q= 104 cc ix (13) V a x. 3ecoo "r fh, l —7 i Vl 321, 09/ e•! 1-14i. l4eovilded L4 7 1 69.5%4-, -- �.4*4e' , i j-- t eo�-;rs x! WL. 1�7 -7 3 76 '. �. I 7-7- f 10?, Z15( 77 -J, 3,44 0 IC,2 B September. 20, 1988 D -1 Valley Land Development. Company Post Office Box 750 La Quinta, California 92253 Project: Tentative Tracts 23268 and 23269 and Seventy -One Acre Future Tract Le Quinta, California Subject: " Percolation Testing for Stormwat.er Runoff B7- 0775 -P 1 88 -09 -731 As requested, we hove performed the drilling and percolation testing for ' stormwater runoff on the above referenced projects. ' Six (6) test holes. were excavated to a maximum depth of ten (10), feet below existing. grade in the proposed areas of the.retention basins. Test results are as follows: The percolation rates provided above are ultimate values and MY safety factor applied. Because water to be introduced into the a not had a be stormwater runoff, a.potential of silting of the percolatin system will be addressed. It is recommended that an appropriate safety factor be oppliied to the above rates.. The approximate loca the attached plan. tions Of'-test hole` shown-on are show on Please contact the undersigned It there are any questions concerning this report. g Respectfully submitted, BUENA ENGINEERS, INC. �00f.ESS10 /, Reviewed an 'C.,1? ?� Brett L. Anderson Staff Engineer seph R. Ye ut ; Civil Engineer BUENA ENGINEERS, INC. 6 6 Gal Fey .38.4 C. .20 D .25 66.5 E .19 .67.7 F .33 50.4 .20 67.5 The percolation rates provided above are ultimate values and MY safety factor applied. Because water to be introduced into the a not had a be stormwater runoff, a.potential of silting of the percolatin system will be addressed. It is recommended that an appropriate safety factor be oppliied to the above rates.. The approximate loca the attached plan. tions Of'-test hole` shown-on are show on Please contact the undersigned It there are any questions concerning this report. g Respectfully submitted, BUENA ENGINEERS, INC. �00f.ESS10 /, Reviewed an 'C.,1? ?� Brett L. Anderson Staff Engineer seph R. Ye ut ; Civil Engineer BUENA ENGINEERS, INC. pd - 4 ie 1 • V Vh H v 60 � Gj• G er' • h h pd - 4 ie 1 • V X14 7W Bo,e i,,! 6 19 Pe ac.Qc..a7�av 7�sT ,56L4Z ol L.oc+►T1 o,us T�7'Ar /vE T,Rfer 23ZG9 I BUENA ENGINEE -RS, INC. DATE: 9 -/6 -8� JOB NO 8 W *t t /1 YL!i/ ✓t M h n 112-Y MAP X14 7W Bo,e i,,! 6 19 Pe ac.Qc..a7�av 7�sT ,56L4Z ol L.oc+►T1 o,us T�7'Ar /vE T,Rfer 23ZG9 I BUENA ENGINEE -RS, INC. DATE: 9 -/6 -8� JOB NO 8 nwL At 50 IATES, MU. 71.2 Eugene Road , BHEET H0._ --- ----- OF ` PALM. SPRINGS, CALIFORNih 92264 P A� ,/,t (619) 327.7786 CALCULATEO BY DATE -- _ CHECKED BY J4 4 DATE _�1 SCALE 6 t A i (USE E 61 1 1.7i QdAmS _! Vp Fl- .B c l 0 m K-WL ASSOCIATES; INC. 712 Eugene Road - - PALM SPRINGS.,. CALIFORNIA 92264. (619).327-7786 . . . J, -7a.4 C- -T- AJ6, -Z oo $mEE7. NO. OF CALCULATED SY DATE CHECKED By DATE SCALE A o I a / 7.7 ..G �S ; � _ �K a. .i_1� 28� I I Z-7 7 Z ,5 )Z 14 Z 6i '14 17 V CA3 -,A Y7 4 4, ' !.ej 9, 7 . ...... 77 7 j-r - /4P4F 4 4 -vL Z-9 FJ 64`7 y:__.� _ Fr U I I i �' ', �� u=1�1 I-I -1