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CT 02-28; La Costa Condominiums; Tentative Map (CT) (13)
_-._- 3-1 - - Hofman Planning -A A s s o c i a t e s Planning Fiscal Analysis Environmental - LETTER OF TRANSMITTAL DATE: August 27,2003 PROJECT: DELIVERED BY: Hand Delivery ATTENTION: Frank Jimeno cc: FROM: Roy Publico La Costa Condominiums Project (CT 02-28KP 02-1 3/HDP 02-1 4) Jo h n S tro h ming er Thank you for taking the time last week to meet with us to discuss your engineering comments on the La Costa Condominiums project. Per your request, attached to this transmittal is the additional information regarding the June 17, 2003 letter addressing the detention basin (Engineering Issue #9): 0 Copy of Letter from (Leighton & Associates, dated 6/17/03) 0 Legible Slope Exhibit 0 Slope Stability Calculation and Output File For the items you wanted clarification on: 0 The "Appendix A" refers to the Section D-D 0 The letter assumes that the detention basin is full 0 Another assumption is that "an elevated groundwater level" refers to a high groundwater level If you have any questions or need additional information, please give me a call. Attachments 5900 Pasteur Court . Ste 150 . Carlsbad . CA . 92008 . 760-438-1 465 . Fax 760-438-2443 Leighton and Associates, lnc. GEOTECHNICAL CONSULTANTS FAX TRANSMITTAL The attached documents may contain confidential information. This information is intended solely for use by the individual or entity named as the "Recipient" below. If you are not the intended recipient, be aware that any disclosure, copying, distribution, or use of the contents of this transmission is prohibited. If you have received this transmission in error, please notify us by telephone immediately so we may carrange to reti-ieve thls transmission at no cost to you. DATE: August 25,2003 PROJECT NO. 980 16 1 -002 RECIPIENT: COMPANY: FAX: SENDER: SUBJECT: Roy Publico Hoffinan Planning 760-438-2443 David Olson and Haze Rodgers As requested please find attached the Slope W, slope stability calculation and output file for the proposed detention basin for lot 185. La Costa Avenue South, Unit #1 located in Carlsbad, CA. COMMENTS: TOTAL NUMBER OF PAGES 6 (including cover sheet) ORIGINAL X WILL - WILL NOT FOLLOW Please contact this office if you encounter problems with this transmission. 3934 Murphy Canyon Road, Suite B205 m San Diego, CA 92123-4425 858.292.8030 Fax 858.292.077 1 m w.cnv.leightongeo.con~ La Costa Cross Section D-D' Proposed Grading June 2003 File Name: La Costa DO Static 6-16-03 2.slz Analysis Method: Bishop Factor of Safety: 1.59 Scale = 1" : 60' D 240 120 40 0 / Artificial Fill (Af) Unit Weight: 125 Cohesion: 250 Phi: 27 Piezometric Line #: 1 Santiago Formation (Tsa) , Unit Weight: 130 : 500 I.ic Line #: 1 SECTION D-0' N3 E La costa DD static 6-16-03 2 crit Surf.1 La Costa Cross Section D-0' DATESTAMP 6/16/2003 TIMESTAMP 10:02:27 AM Mi d-irei gli t 3.406674e-001 9.541890e-001 2.644871e+000 5.361258ei000 7.780314ei000 ____- ~ .-___--__ --__-_-_-_---_ Y-R-Bo t toni 1.371258et002 1.365526et002 1.359223ei002 1.354493e+002 1.351604et002 1.349925et002 1.349472et002 1.350511e+002 1.353045e-to02 -- ._____-_____-__ 1 2 3 2.139602ei002 2.171701e+002 2.203800ei002 1.377888et002 1.371258e+002 1.365526ei002 1.359223ei002 1.354493e+002 1.351604et002 1.349925e+002 1.349472e+002 1.350511e+002 1.353045ei002 1.357084ei002 1.362643e to02 4 2.246900ei-002 1.399450ei002 5 6 7 2.290000e+002 2.328150et002 2.366300e+002 1.421100et002 1.440300et002 1.459500et002 2.328150e+002 2.366300ei002 2.408774e+002 2.451248ei002 2.493722ei002 1.514113ei002 9.928629e+000 1.190900et001 1.370014e+001 1.477704et002 1.495909ei002 8 2.408774ei002 1.477704et002 9 10 11 Z .4SI248&002 2.493722ei002 2.536196er002 i. 495909et002 1.514113ei002 1. S32317ei002 1.534202ei001 1.683397ei001 1.817476ei001 1.936.256et001 2.039493e+001 2.126875ei001 2.198014et001 2.252443e+001 2.289598e+001 2.308811et001 2.309286ei001 2.290082et001 2.250080e*001 2.187942et001 2.102063e+001 1.990497e+001 1.850859e+001 2.536196et002 1.532317ei002 2.578670et002 1.550522ei002 2.621143ei002 1.568726et002 1.357084e1002 1.362643ei002 1.369743et002 12 13 14 15 16 17 18 19 20 21 22 23 1.550522e to02 1.568726e+002 1.369743et002 1.586930ei002 1.378422er002 1.605135e+002 1 388685et002 1.623339e+002 1.641543et002 1.659748e to02 1.677952ei002 1.696157e+002 1.714361et002 3.003409e1002 1.732565ei002 3.045883et002 1.750770et002 24 3.088357ei002 1.768974ei002 2.578670ei002 2.663617ei002 2.706091e+002 2.748565et002 2.791039e+002 2.833513e+002 2.875987et002 2.918461e+002 2.960935ei002 3.003409et002 3.045883et002 3.088357et002 1.564011et002 3.130830et002 25 3.130830e+002 1.787178ei002 1.594743et002 3.173304et002 1.805383et002 1.586930e+002 1.605135et002 1.623339e to02 1.641543et002 1.659746ei002 1.378412et002 1.388685ei002 1.400604et002 1.414222et002 1.429598et002 1.446808e to02 1.465936et002 1.487085et002 1.510378e to02 1.535961et002 1.564011ei002 1.591743et002 1.628421ei002 j6 5. i753osetooi 1.805383e+002 27 3.215778et002 1.823587~-002 28 3.258252ei002 1.841791et002 1.665380e+002 1.706045ei002 1.750976e+002 1.800929et002 1.843943ei002 1.891347et002 1.908093er002 1.680182e1001 1.4 74 709e+001 1.229579e+001 9.383132ei000 29 3.300726e+002 1.859996et002 1.870200et002 30 3.343200e+002 1.878200et002 31 3.376250et002 1.892250et002 32 3.409300e+002 1.906300et002 1.800929et002 1.843943ei 002 1.891347et002 3.376250ei002 3.409300e+002 3.420193et002 1.892250e+002 1.906300et002 1.908093ei.002 6.328812et000 3.223335et000 7.552311e-001 L-Load-x 0.0000ei000 0.0000e-r 000 0.0000e-1-000 0. OOOOe to00 0.0000ei 000 0.0000e+000 0.0000ei000 0.0000e+000 0.0000e+000 0.0000e+000 0.0000e+000 0.0000e+000 0.0000e+000 0.0000e+000 - - - - _ __ - - __ .------------- L-Load-Y 0.0000ei-000 0.0000et000 0.0000e+000 0. OOOOe tOOO 0.0000et000 0.0000e+000 0.0000e+000 0.0000e~000 0.0000ei 000 0.0000e-r 000 0.0000er000 0.0000et000 0.0000et000 0.0000e+000 - __ .. __ - - - -__ - _---------_-- LLoad-x 0.0000ei000 0.0000et000 0.0000et000 0.0000e+000 0.0000e+O00 0.0000et00n 0.0000e.I-000 0. OOOOe toOD 0.0000et-000 0. OOOOei 000 0.0000et000 0.0000e+000 0.0000ei-000 0.0000e-to00 - - -_ -- - - - - - --_-- - --_---- A-Load-Y 0.0000e+000 0.0000e+000 0.0000ei000 0.0000ei000 0.0000e+000 0. OOOOe tOOO 0.0000e+000 0.0000e+000 0.0000et000 0. OOOOe tOOO 0.0000ei-000 0.0000e+000 0.0000e+000 0.0000e+000 . __ - _ - - __ - - _ - ---- --- P_-L.oad-J P-Load-Y 0.0000et000 0.0000et000 0.0000eiOOO 0.0000eiOOO 0.0000e-1000 0.0000eiOOO 0.0000et000 0.0000et000 0.0000e+000 0.0000et000 0.0000e+000 0.0000et000 0.0000ei000 0.0000et000 0.0000e+000 0.0000e+000 0.0000ei000 0.0000ei000 0.0000e+000 0.0000et000 0.0000et000 0.0000e+000 0.0000e+000 0.0000e+000 0.0000e+000 0.0000e+000 0.0000e+000 0.0000e+000 - - - - - - - _ _- - - __ -_ . . - - - - - - __ - .__--____--_____-__________ Page 1 &Moll i f i er 1. OOOOe tooo 1.0000et000 1 .0000ei 000 1.0000ei000 1.0000et000 1. OOOOet 000 1.0000et000 1.0000ei000 1.0000e+000 1.0000e+000 1.0000e+000 1.0000e+000 1.0000e+000 1.0000ei 000 .----_---___-_ AS-Load2 0.0000e-1-000 0.0000et000 0.0000e1000 0.0000ei000 0.0000ei 000 0.0000et000 0.0000ei000 0.0000e+000 0.000Oe+000 . -_ _- - - - - - -- - - - -__----- AS-Load-Y 0.0000et000 0. OOOOei 000 0. oooot? tooo 0.0000e+000 0.0000e+000 0.0000ei000 0.0000e+000 0.0000e+000 0.0000e-t 000 0.0000e+000 0.0000e+000 0.0000e+000 0.0000e+000 0.0000e+000 ---_-_---___ -----------_ 1 2 3 4 5 6 7 9 10 a 11 12 -~ 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 SL# ==== 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 0.0000e+000 0.0000ei000 0.0000e+000 0.0000e+000 0.0000e+000 0.0000eiOOO 0.0000et000 0.0000et000 0.0000e+000 0.0000ei 000 0.0000et000 0.0000ei000 0.0000ei000 0.0000e-1-000 0.0000e+000 0.0000e+000 0.0000e+000 0.0000e+000 Weight 1.3669ei002 3.8286ei002 1.4249e1003 2.8884e+003 3.7102et003 4.7347e+003 6.3228e+003 7.273 7ei 003 8.1454e-1003 8.9376et003 9.6494et003 1.028Oe to04 1.0828ei004 0. OOOOet 000 0.0000e+000 0.0000e+000 0.0000e+000 0.0000e+000 0.0000e+000 0.0000e+000 0.0000e+000 0.0000et000 0.0000e+000 0.0000e+000 0.0000e-1000 0. OOOOe 6000 0.0000ei000 0.0000e+000 0.0000e+000 0.0000e+000 0.0000e+000 Pore-Water 0.0000e+000 0.0000e+000 0.0000ei 000 0.0000e+000 0.0000e+000 0.0000e+000 0.0000e+O00 0.0000et000 0. OOOOe tOOO 0.0000et000 0.0000e+000 0.0000ei000 0.0000e+000 0.0000e-1000 0.0000e+000 0.0000e+000 0.0000e-1000 0.0000e+000 A1 pha La Costa 0. OOOOe tOOO 0.0000e+000 0.0000et000 0.0000e+000 0.0000et000 0. OOOOet 000 0.0000e+000 0. OOOOet 000 0. OOOOe tOOO 0.0000ei 000 0.0000et000 0.0000et000 0.0000et000 0.0000e+000 0.0000e+000 0.0000et000 0.0000et000 0. OOOOe tooo Force En. - - - - - - - - - - - _ _ - - . - - - - - - - - _- - - - - - - - - - - . - - _-----_----_-_---_-_------------_------ 9.2347et002 -1.1672e6001 1.00OOet000 1.052Oe+003 -1.0124et001 1.0000et000 1.5830et003 -8.3205et000 1.0000et000 1.7384er003 -6.2626et000 1.0000et000 1.6920e+003 -4.3303ei000 1.0000e+000 1.8430et003 -2.5203e+000 1.0000et000 2.196Set003 -6.1058e-001 1.0000e~000 2.3129e+003 1.4010et000 1.0000et000 2.3927et003 3.4143et000 1.0000ei000 2.4360ei003 5.4318e tOOO 1. OOOOei 000 2.4421e+003 7.4562et000 1.0000e+000 2.4104et003 9.4899et000 1.0000e~000 2.3394ei003 1.1536e1001 1.0000e~000 1. OOOOe to00 1.0000et000 1.0000ei 000 1.0000e+000 1. OOOOet 000 1.0000et000 1.0000et000 1.0000et000 1.0000e+000 1.0000et000 1.0000e+000 1.ooooc+ooo 1.0000e+000 1.0000et000 1.0000e+000 1.0000et000 1.0000e+000 1.0000et000 1. OOOOei 000 1.1292ei004 2.2272et003 1.3597et001 1.1670e+004 2.0715et003 1.5676e+OOL 1.1959ei004 1.8690et003 1.7776e-1001 1.2156e+004 1.6159ei003 1.9902et001 1.2258e+004 1.3070e+003 2.2056e+001 1.2261ei004 9.3630er002 2.4244et001 1.2159e-1004 4.9590e to02 2.6471e+OOL 1.1946e+004 0.0000ei000 2.8741e+001 1.1616et004 0.0000et000 3.1062et001 1.1160et004 0.0000et000 3.3441ei001 1.0568e+004 0.0000e-1000 3.5887e+001 9.8267e+003 0.0000et000 3.8412et001 8.920SetO03 0.0000e-1000 4.1028e+001 7.8296et003 0.0000e+000 4.3754eiOOl 6.5281e+003 0.0000et000 4.6610e+001 4.9817et003 0.0000et000 4.9626e+001 2.6146e1003 0.0000et000 5.2463et001 1.3316et003 0.0000e+000 5.5116ei001 1.0284et002 0.0000ei000 5.6957et001 DO static 6- 0.0000et000 0.0000e+000 0.0000e+000 0.0000et000 0.0000e+000 0.0000e+000 0.0000e+000 0.0000e+000 0.0000e+000 0.0000ei 000 0.0000e+000 0.0000e-t000 0.0000et000 0. OOOOet 000 0.0000e+000 0.0000et000 0.0000e+000 0.0000e+000 Sei sriii c-F - - - - - - - - - - - - - _-----_----_- 0. OOOOe tooo 0.0000et000 0.0000ei 000 0.0000et000 0. OOOOei 000 0.0000ei000 0.0000e1000 0.0000e+000 0. OOOOet 000 0. OOOOe to00 0.0000et000 0.0000eiOOO 0.0000e-t 000 0.0000et000 0.0000ei000 0.0000et000 0.0000et000 0.0000e+000 0.00OOet000 0.0000ei000 0.0000ei 000 0.0000e+000 0.0000et000 O.OOOOe+OOO 0.0000e+000 0.0000et000 0.0000et000 0.0000e+000 0.0000e-1000 0.0000et000 0.0000e-1000 0.0000e+000 16-03 2 Crit 0.0000e+000 0.0000et000 0.0000et000 0.0000e+000 0.0000e+000 0.0000e+000 0.0000et000 0.0000et000 0.0000et000 0.0000eiOOO 0.0000e+000 0.0000e+000 0. OOOOe tOOO 0.0000e+000 0. OOOOet 000 0.0000e+000 0.0000e+000 0.0000e-1-000 sei sini CLY Ordinary-Method-Fm= 1.5031731 ~p lied-Lambda- 0,0000 SL# Normal-M ShearMob Phi Anyye cohesion ..................................................................... 1 1.3386e+002 2.7750e+002 2.7000et001 2.5000e+002 2 3.7690et002 3.1350e+002 2.7000et001 2.5000et002 3 1.4099e+003 6.6581e+002 2.7000et001 2.5000e+002 4 2.8711et003 1.1051e+003 2.7000e+001 2.5000et002 __ _. __ _--------_-_- 0.0000et000 0.0000e+000 0.0000et000 0. OOOOe to00 0.0000e+000 0.0000ei000 0.0000et000 0. OOOOe to00 0. OOOOet 000 0.0000ei000 0.0000e+000 0.0000et000 0.0000et000 0.0000et000 0.0000et000 0.0000et000 0.0000et000 0.0000e-I 000 0. OOOOe tOOO 0. OOOOe tOOO 0.0000et000 0.0000e~000 0.0000ei000 0. OOOOet 000 0.0000e+000 0.0000e+000 0.0000et000 0.0000e+000 0.0000et000 0.0000e+000 0.0000et000 0.0000e+000 Surf. 1 1.0000ei000 1.0000eiOOO 1.0000e-1000 1.0000e+000 1.0000e+000 1.0000et000 1.0000et000 1.0000e+000 1.0000et000 1.0000e+000 1.0000et000 1.0000e+000 1.0000ei000 1.0000et000 1.0000e+000 1.0000e+000 1.0000e+000 1.0000e+000 PoreAi r _--_---_-_ _- _-----_----_- 0. OOOOe to00 0.0000e-1 000 0.0000et000 0.0000et000 0.0000e-1000 0.0000ei000 0. OOOOe to00 0.0000e+OOO 0. OOOOe too0 0. OOOOe tOOO 0.0000e+000 0.0000et000 0.0000et000 0. OOOOe ,000 0. OOOOe tOOO 0.0000et000 0.0000e+000 0. OOOOrt 000 0. OOOOei 000 0. OOOOe tOOO 0. OOOOer 000 0.0000ei000 0.0000ei 000 0.0000e+000 0.0000e+000 0.0000e+000 0.0000et000 0. OOOOe ,000 0.0000er000 0.0000eiOOO 0.0000e+000 0.0000e+000 0.0000e+000 0.0000et000 0.0000eiOOO 0.0000e-1 000 0. OOOOe to00 0.0000e+000 0.0000et000 0. OOOOe tOOO 0.0000e+000 0.0000ei000 0.0000e+000 0.0000e-1 000 0.0000et000 0.0000e+000 0.0000e+000 0.0000et000 0.0000eiOOO 0.0000e+000 Phi-e 0.0000et000 0.0000ei000 0.0000et000 0.0000e+000 0.0000e+000 0.0000et000 0.0000et000 - - .. - - - - - - - - __ _---_-----__- 0. ooooe tooo 0.0000e-1000 0.000Oe+000 0.0000e+000 0.0000et000 0.0000et000 0. OOOOe tOOO 0.0000e-t000 0.0000ei000 0.0000ei000 0.0000eiOOO 0.0000et000 0.0000e+000 0. OOOOei 000 0.0000ei 000 0. OOOOe to00 0.0000e+000 0.0000e+000 0.0000et000 0.0000et000 0.0000e+000 0. OOOOei 000 0.0000e+000 0.0000e1000 0.0000e+000 0.0000e+000 0.0000ei 000 0. OOOOei 000 0.0000e+000 0.0000ei 000 0.0000et000 0.0000e+000 0.0000e+000 0.0000e+000 0.0000e.t 000 0.0000e+000 0. OOOOei 000 0.0000ei 000 0.0000e+000 0.0000e+000 0.0000e+000 0.0000e+000 0.0000e+000 Liqui fi ed 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 __-~ _-__ _-_ __ page 2 5 3.6996e+003 6 4.7301e-to03 7 6.3224e+003 8 7.2716et003 9 8.1310e+003 10 8.8974e+003 11 9.5678e+003 12 1.0139e+004 13 1.0609e+004 14 1.0976e+004 15 1.1236e+004 16 1.1388e+004 17 1.1430et004 18 1.1361et004 19 1.1179e+004 20 1.0884e+004 21 1.0474et004 22 9.9507et003 23 9.3128et003 24 8.5619et003 25 7.6998e+003 26 6.7295et003 27 5.6555et003 28 4.4846e+003 29 3.2270e-1003 30 1.5930e to03 31 7.6159e-tO02 32 5,6074e-tO01 si shop-MethoddFw SL# Normal-M 1 1.9804~ 002 2 4.4579~1002 3 1.5382e+003 4 3.0259et003 5 3.8180ei 003 6 4.8076ej003 7 6.3444ei003 8 7.2211et003 9 8.0125e+003 10 8.7224e-1003 11 9.3536ei003 12 9.9077ei003 13 1.0386e to04 14 1.0788et004 15 1.1113et004 16 1.1358e+004 17 1.1521e 1004 18 1.1597et004 19 1.1580et004 20 1.1461e1004 21 1.1232ei004 22 1.0972e+004 23 1.0601et004 - - - - -- - - - - - - - . - - -_____-___-__-___ 24 1. oio& tooi 25 9.4603ei003 26 8.6433et003 27 7.6164et003 28 6.3282e+003 29 4.7041e-1003 1.3169ei003 1.6138ej003 2.1050e+003 2.3875e+003 2.6528e+003 2.8998e-1003 3.1278e+003 3.3361e+003 3.5243e+003 3.6922et003 3.8401e+003 3.9684e+003 4.0780ej003 4.1702e+003 4.2468e+003 4.3104et003 2.7000et001 2.7000et001 2.7000e+001 2.7000e+001 2.7000e+001 2.7000e+001 2.7000e+001 2.7000e+001 2.7000et001 2.7000e+001 2.7000et001 2.7000e+001 2.7000e+001 2.7000e+001 2.7000e+001 2.7000et001 La costa 2.5000et002 2.5000e+002 2.5000e+002 2.5000e+002 2.5000et002 2.5000e+002 2.5000e+002 2.5000e+002 2.5000e+002 2.5000e+002 2.5000e+002 2.5000et002 2.5000et002 2.5000e+002 2.5000e+002 2.5000et002 4.3562e+003 2.7000e+001 2.5000etQ02 4. i977e+oo3 2.7oooe+ooi 2. soooi+oo2 4.0033e+003 2.7000e+001 2.5000ei002 3.7742et003 2.7000e+001 2.5000e+002 3.5116ei-003 2.7000et001 2.5000et002 3.2176e+003 2.7000et001 2.5000ej002 I JD static 6-16-03 2 Crit Surf.1 2.8951ej003 2.7000ei001 2.5000ei002 2.5485e+003 2.7000et001 2.5000et002 2.1845et003 2.7000ei001 2.5000e+002 1.4422e+003 2.7000e+001 2.5000e+002 1.2193ei003 2.7000e+001 2.5000e1002 3.5127ei002 2.7000et001 2.5000et002 ShearMob Phi -my ye Cohesion Si deLeft ShearLef t si deRi qh t ShearRi yht 1.5877082 Ap lied-Lambda= 0.0000 ._ - - - - - - - - - - ---- ----- 2.8331ei002 3.1892ej002 6.7152et002 1.0959e+003 1.2848e+003 1.5527et003 2.0000ej003 2.2442ei003 2.4735ei003 2.6893et003 2.8925ej003 3.084 le, 003 3.2649@+003 4.0240et003 4.1493e1003 4.2660et003 4.3675et003 4.3021et003 3.3702ei003 3.0045e+003 2.5422e+003 - - - - . - - - - - - - _- - - __ _-- - _- 2.7000e1001 2.7000e to01 2.7000e+001 2.7000et001 2.7000et001 2.7000e+001 2.7000et001 2.7000et001 2.7000et001 2.7000ei 001 2.7000et001 2.7000rt001 2.7000et001 2.7000i tooi 2.7000et001 2.7000et001 2.7000et001 2.7000ei 001 2.7000ej001 2.7000et001 2.7000ej001 2.7000e tOOl 4.2037e1003 2.7000e1001 4.0681ei003 2.7000etOOL 3.8896et003 2.7000ej001 3.6604e-r 003 2.7000e tOOl 2.7000e+001 2.7000e+001 2.7000et001 _-I__..__-- ~_- -__-_-__---_- 2.5000er002 2.5000e1002 2.5000ei002 2.5000et002 2.5000ei002 2.5000et002 2.5000e1002 2.5000et002 2.5000et002 2.5000et002 2.5000et002 2.5000e+002 2.5000et002 2.5000et002 1.6796et 003 3.1671ei003 4.8144et003 6.6693et003 8.8535et003 1.1049etQ04 1.3181et004 1.5182e+004 1.6997ej004 1.8575et004 1.9875e+004 2.0865e-1004 2.1522et004 2.182Bet004 2.1778et004 2.1377e-to04 2.0639e+004 1.9593e-100~ 1.8275et004 1.6554et004 1.4476e+004 1.2103e-to04 9.5238et003 6.8560e+003 4.2576e+003 1.9415e+003 Page . _- - __ - - - - - -. - - - - __ - - __ .. - __--________-__-__-------- 0.0000ei000 -3.3653e1002 0.0000e+000 -7.4972ei002 0.0000et000 -1.6796e+003 0.0000er000 -3.1671et003 0.0000ei000 -4.8144e+003 0.0000ei000 -6.6693et003 0.0000e+000 -8.8535et003 0.0000ei000 -1.1049et004 0.0000e+000 -1.3181e+004 0.0000etOOO 1.5182e+004 0.0000ei000 -1.6997e+004 0.0000et000 -1.8575e+004 o.oooortaoo -1.9875e+004 0.0000e-t000 -2.0865er004 0.0000et000 -2.1522e+004 0.0000e+000 -2.1828e+004 0.0000ei000 -2.1778e+004 0.0000ei000 -2.1377e1004 0.0000et000 -2.0639et004 0.0000ei000 -1.9593ek004 0.0000et000 -1.8275e+004 0.0000e-1000 -1.6554e4004 0.0000ei000 -1.4476et004 0.0000et000 -1.2103et004 0.0000ei000 -9.5238e+003 0.0000e+000 -6.8560e+003 0.0000e+000 -4.2576e+003 0.0000ei000 -1.9415e+003 0.0000e+OOQ -1.9923e+002 3 . __ - - - -. _ - . -_--_--- -- __ 0.0000etOOO 0.0000ei 000 0.0000et000 0.0000e+000 0.0000et000 0. OOOOe to00 0.0000et000 0.0000e+000 0.0000et000 0.0000e-1000 0. OOOOe tOOO 0.0000et000 0.0000e+000 0.0000et000 0.0000et000 0. OOOOe to00 0.0000e+000 0.0000e-1000 0.0000e+000 0.0000et000 0.0000et000 0.0000et000 0. OOOOe tOOO 0.0000e+000 0. OOOOei 000 0.0000e+000 0.0000e+000 0.0000e+000 0.0000e+000 rldl top I ', . 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 2.0176e-1002 4.4938e+002 1.5443e+003 3.0332ei003 3.8239e+003 4.8117e+003 6.34S7e+003 7.2179e+003 8.0040et003 8.7078et003 9.3321e+003 9.8789e+003 1.0349e+004 1.0742et004 1.574Set003 1.1353e+003 2.5127e ,002 1.4960224 ShearMob -___-----_--- 3.0195e+002 3.3968e+002 7.1476e-1 002 1.1513e+004 1.1484e+004 1.1353e+004 1.1113e1004 1.084 5e I 004 1.0467e+004 9.9643e-1003 9.3165e+003 8.4979e to03 7.4724ei003 6.1899e+003 4.5777e+003 2.1604e-1003 6.3712e1002 -2.1227e+002 1. i353e+oo4 1.1113e1004 1.084 5e I 004 1.0467e+004 9.9643e-1003 9.3165e+003 8.4979e.tO03 7.4724ei003 6.1899e+003 4.5777e+003 2.1604e-1003 6.3712e1002 1.1656e+003 1.3655ei003 1.6493e+003 2.1230et003 2.3806et003 2.6222e+003 2.8491ei 003 3.0625e+003 3.2633e-1003 3.4524e+003 3.6304e+003 1.1058e+004 3.7979et003 1.1294e+004 3.9555e-1003 1.1447et004 4.1033e+003 1.1513e+004 4.2418et003 1.1484e+004 4.3709et003 4.4908et003 4.5944et003 4.5224et003 4.4157e+003 4.2698e+003 4.0790et003 1.1828e+003 2.6156et002 51 i Surface-Sunimary Anal;ysl s val ume ordinary Method 1.9672et003 Bishop Method 1.9672e+003 lanbu Method 1.9672e+003 ==---------------------------- ............................ La costa DO static 6-16-03 2 crit surf.l 2.7000e+001 2.5000e+002 1.9923e+002 0.0000e+000 4.9430e+002 2.7000e+001 2.5000e+002 -4.9430e+002 0.0000e+000 3.2448e+002 2.7000et001 2.5000e+002 -3.2448e-1002 0.0000e+000 3.1548e-011 Phi-any ye cohesion SideLeft sheart.eft SideRight Ap lied-Lambda= 0,0000 2.7000e+001 2.7000e+001 2.7000e-1 001 2.7000ei001 2.7000e-1001 2.7000e+001 2.7000e+001 2.7000et001 2.7000et001 2.7000e+001 2.7000e+001 2.7000e+001 2.7000et001 2.7000e tOOl 2.7000e tOOl 2.7000e+001 2.7000e-1001 2.7000e+001 2.7000et001 2.7000et001 2.7000e tOOl 2.7000e+001 2.7000e+001 2.7000e-1001 2.7000e+001 2.7000e+001 2.7000e+001 2.7000e+001 2.7000e+001 2.7000e-1-001 2.5000et002 2.5000e+002 2.5000et002 2.5000e+002 2.5000e+002 2.5000e+002 2.5000e+002 2. SOOOe to02 2.5000et002 2.5000e+002 2.5000e to02 2.5OOOe to02 2.5000e+002 2.5000et002 2.5000e-1002 2.5000e-1002 2.5000et002 2.5000e+002 2.5000e+002 2.5000e+002 2.5000e to02 2.5000e to02 2.5000et002 2.5000et002 2.5000e-1002 2.5000e to02 2.5000et002 2.5000et002 2.5000e+002 2.5000e to02 2.5000et002 2.S000ei002 1.6796e+003 3.1671rt003 4.8144e+003 6.6693et003 8.8535e+003 1.1049e+004 1.3181e+004 1.5182e+004 1.6997e to04 1.8575e+004 1.9875e+004 2.0865e+004 2.1522e-1004 2.1828et004 2.1778e+004 2.1377e.1004 2.0639e+004 1.9593e+004 1.8275~ 004 1.6554e to04 1.44 76e+004 1.2103e-1004 9.S238et003 6.8560e+003 4.2576et003 1.9415e-1003 1.9923et002 -4.94 30e+002 -3.2448e+002 1.6796e+003 3.1671et003 4 .ii44e+ooj 6.6693et003 8.8535e+003 1.1049e+004 1.3181e+004 1.5182e+004 1.6997e to04 1.8575e+004 1.9875e+004 2.0865e+004 2.1522e-1004 2.1828et004 - . - - . . - . . . . 2.0639e+004 1.9593e+004 1.8275e-1-004 1.6554e to04 1.44 76e+004 1.2103e-1004 9.S238et003 6.8560e+003 4.2576et003 1.9415e-1003 1.9923et002 -4.94 30e+002 -3.2448e+002 0. OOOOet 000 0. OOOOe tOOO 0.0000e-1000 0.0000ei 000 0.0000e-1000 0. OOOOet 000 0.0000e+000 0. OOOOe-1 000 0. OOOOe to00 0.0000e+000 0.0000e+000 0.0000e+000 0. OOOOe to00 0. OOOOet 000 0.0000e+000 0.0000e+000 0.0000e+000 0.0000e+000 0.0000e+000 0. OOOOe tOOO 0.0000e+000 0. OOOOe too0 0. OOOOe tOOO 0.0000ei000 0.0000et000 0.0000et000 0.0000e-1000 0.0000ei000 0.0000e+000 0. OOOOe tOOO 0.0000et000 0. OOOOe too0 -3.3653e+002 -7.4972e-1002 -1.6796et003 -3.1671e+003 -4.8144e-1003 -6.6693ei 003 -8.8535et003 -1.1049ei004 -1.3181e-1004 -1.5182et004 -1.6997et004 -1.8575e+004 -1.9875e+004 -2.O865e to04 -2.1522e+004 - 2.1828et004 -2.1778e+004 -2.1377e+004 -2.0639e-1004 -1.9593e+004 -1.8275e-1 004 -1.6554e+004 -1.4476e+004 -1.2103et004 -9.5238e+003 -6.8560e to03 -4.2576e-1003 -1.9415e-1003 -1.9923e+002 4.9430et002 3.2448et002 3.1548e-011 weight Res-Moment Act-Monlent Res-Force Act-Force 2.4590e+005 1.5885e+007 1.0568et007 2.4590e+005 1.6779et007 1.0568e+007 2.4590e+005 1.2152e+005 8.1228et004 ---------_-_---_----_____________^______------------------------- ShearRi yhr 0.0000e+000 0.0000e+000 0.0000e+000 0.0000e+000 0.0000e+000 0.0000e-r 000 0.0000e+000 0.0000e+000 0.0000e+000 0.0000et000 0. OOOOe tOOO 0.0000e+000 0.0000e+000 0.0000ei000 0.0000e+000 0.0000e+000 0.0000et000 0.0000e+000 0.0000e+000 0.0000e+000 0.0000e+000 0.0000e+000 0.0000e+000 0.0000e+000 0.0000e-1000 0. OOOOe tOOO 0.0000et000 0.0000et000 0.0000e+000 0.0000e+000 0.0000e+000 0.0000et000 ______-_-_-- ------------ Page 4 Leighton and Associates, Inc. A LEIGHTON GROUP COMPANY June 17,2003 Project No. 980161-002 To: Mi. Kwan So 2683 Costebelle Drive La Jolla, California 92037 Subject: Evaluation of Proposed Detention Basin, Lot 185, La Costa Avenue South Unit 1, Carlsbad, California Reference: Leighton and Associates, 2002, Updated Preliminary Geotechnical Report, Lot 185, La Costa Avenue South Unit 1, Carlsbad, California, Project No. 9801 6 1-002 As requested, we have performed an additional stability analysis of the proposed fill slope located above the proposed detention basin for Lot 185 of La Costa Avenue South Unit 1, located south of La Costa Avenue and north of Sacada Circle, in Carlsbad, California. The proposed detention basin, as shown on Tentative Tract Map prepared by O’Day Consultants, dated May 2003, is located at the southeast comer of the project in the vicinity of our Geological Cross-Section D- D’ (Leighton, 2002). In summary, this area is currently underlain by landslide deposits that are considered to be unstable in their present condition and will require remedial measures (i.e. buttressing with fill andor removals of the unstable and potentially compressible portions). Recommendations for the stabilization of the landslide are presented in Section 5.2, and indicated on the Geotechnical Map (Plate 1) and Cross-Sections (Plate 2) of the Updated Preliminary Geotechnical Report. Given the results of our previous investigation and the proposed grades for detention basin, the fill slope (i.e., a remediated fill slope with a buttress) was analyzed for gross stability utilizing the slope stability program SLOPEN (Geo-Slope, 2002). Our analysis, assuming homogeneous slope conditions and an elevated groundwater level, indicates that the designed fill slopes constructed at 2: 1 (horizontal to vertical) slope inclinations up to a maximum proposed height of 50 feet will have a calculated factor of safety of 1.5 or greater with respect to potential, deep rotational failure. The slope stability calculation is presented in Appendix A. Note that the proposed slopes should be constructed in accordance with the recommendations of this report, the General Earthwork and 3934 Murphy Canyon Road, Suite 8205 San Diego, CA 92123-4425 858.292.8030 a Fax 858.292.0771 a www.1eightongeo.com 980 16 1-002 Grading Specifications for Rough Grading (Updated Preliminary Geotechnical Report, Appendix E), and City of Carlsbad grading requirements. If you have any questions regarding this letter, please contact this office. We appreciate this opportunity to be of service. Respectfully submitted, LEIGHTON AND ASSOCIATES, INC. William D. Olson, RCE 45283 Senior Project Engineer Attachment: Appendix A - Slope Stability Distribution: (2) Addressee (6) Hofhan Planning, Attention: Mr. Roy Publico (1) O’Day Consultants, Attention: Mr. George O’Day -2- Leighton and Associates, Inc. A LEIGHTON GROUP COMPANY La Costa Cross Section D-D' Proposed Grading June 2003 File Name: La Costa DD Static 6-16-03 2.slz Analysis Method: Bishop Factor of Safety: 1.59 Scale = 1'' : 60' 120 BD 40 0 Artificial Fill (Af) ! Unit Weight: 125 Cohesion: 250 Phi: 27 Piezometric Line #: 1 , Santiago Formation (Tsa) Unit Weight: 130 / Cohesion: 500 29 :om letric F L 0 a ?! W W Z l- > w Line #: 1 SECTION D-D' N3 E -