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Home My WebLink AboutTract Map 9833-3 Lot 15 Grading Plan Review Ear h echnics =--- RECEIVED FEB 1 0 2000 CITY OF TEMECULA ENGINEERING DEPARTMENT September 28, 1998 proj. No. 98169-03 Byron & Lynae Carr 24079 Huntridge Drive Murrieta, California 92562 SUBJECT: SLOPE STABILITY EVALUATION AND GRADING PLAN REVIEW 4.02+/- Acres, A.P.N. 945-160-004, Lot 16, Tract 9833-3, Calle de Velardo Temecula, California , References: "Preliminary Geotechnical Investiation Single-Lot, Residential Development, Lot 16, Tract 9833-3, Calle de Velardo, Temecula, Riverside County, California", Report Dated June 27, 1998, Proj. No. 98169-01, by Earth Technics "preliminary Sewage Disposal Investigation 4.02+/- Acres, A.P.N. 945-160-004, Lot 16, Tract 9833-3, Calle de Velardo, Temecula Area, Riverside County, California", Report Dated June 27, 1998, Proj. No. 98169-02, by Earth Technics Gentlemen: Subsequent to the issuance of the above referenced reports, a 30- scale Grading Plan prepared Marshall Consulting Services, San Jacinto, undated, was issued that incorporated several changes from the original proposed grading. The grading revision eliminates the retaining wall at the base of the north 2:1 cut slope and steepens the slope to 1.4:1 (horizontal to vertical). In addition, the original area proposed for sewage disposal will be graded and a barn and associated out buildings constructed. This report presents the slope stability for the steeper 1.4:1 21 foot high cut slope and relocates the sewage disposal in an area that meets the health codes and recommendations of the original sewage disposal investigation. \ Earth Technics P.O. Box 891989, Temecula, California 92589 (909) 699-5451 98169-03 Page 2 We have utilized the original soil engineering and percolation test results in our above referenced reports to redesign/relocate the sewage disposal system, and evaluate the current grading concept. FINDINGS Slope Stability The slope stability analysis is included in Appendix A, and as can be seen by the results; the 21 foot high 1.4:1 cut slope in the Pauba Formation is grossly and surficially stable with a factor of safety above 1.5. sewage Disposal The sewage disposal system is to be placed at the location shown on Plate 1 below the proposed tennis court. The original testing is still representative of this new area, and less than 1 foot of fill or cut is proposed in the disposal area that could invalidate -the original results. The system shown meets all -current codes and the recommendations of our original report. "~~::~;':'=~f:~ -~,~ ~ . '- ~., '\lbt~_Ii',J(~" ,/. ~ " ..-..... ,;~, Respect 1.r\t.,,":SubmI tt:w;\ ,<.// /x,t"o l.-. '.h'( ...... Y !::, I~ l'/\C \ '-' "C '/ C) /: 11825): ; "Warren ~I ~,~A1 ,c.E:G'f. f[()Fr.r,,-\\\":J' ; Reglst;r-atISh~?fWF~" , 2-28-00 Larry J. Fast :R.C.E. 29150 : Registration IWLS/LJF:ss ,Attach: Plate 1 (30-scale) - Grading Plan and Geotechnical Map Plate 2 - Geotechnical Cross Section I Distribution: (4) Addressee 't- .......... '" on " M ~wl tf.l lJJ~, I-l tlJZ W E-<< I-l:i ~ ~:s '" '" ,., . :> P,oH:::: lJJ :c Q. F/' /.__' r _. l'lf) / / (/ I ( , .:I:.:.~, I ,"-", 1 ,J,.. ,.~, i~ ~~ ~ lZ.o; I..L ,~~}'(TI', -c " ",' -I.~ -T --~t -' ---1-"'--'\ \ '~"'~..~ ~ ~$:: II q?o~ -f) A, II ',,' '.l(" ~\ ,- \ ", [] \~ ~I'~ g' ~~ !!!~ ,~~'ii) , , , :1..11 i' I ' ' ,.:= ~ 0[5 N~ g 86" , "-.' , , ii' " ,', T~';",.oJ " ", ,\ L- _' " //\~ l\' "\\ If!' '" \ IE.. i5 '" ~ ~ I _ ~"" ,.- "~ N l. '.0 . gj ~ ill ; [5 "" ~ ~ 1\ \"., of \ . 'i!l{ I ' !i! 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I, b.... o ~- APPENDIX B '5 -' ** PCSTABL5M ** by Purdue University 1 --Slope Stability Analysis-- , Simplified Janbu, Simplified Bishop or Spencer's Method of Slices Run Date: Time of Run: Run By: Input Data Filename: Output Filename: Plotted Output Filename: 98169-2 98169-20 98169-2p PROBLEM DESCRIPTION Carr 21'1.4:1 cut BOUNDARY COORDINATES 3 Top Boundaries 3 Total Boundaries 1 2 3 ..00 10.00 31. 00 Y-Left X-Right Y-Right Soil Type (ft) (ft) (ft) Below Bnd 12.00 10.00 12.00 1 12;00 31.00 27.00 1 27.00 86.00 . 27.00 1 Boundary No. X-Left (ft) 1 ISOTROPIC SOIL PARAMETERS 1 Type(s) of Soil Soil Type No. Total Saturated Unit wt. Unit wt. (pcf) (pcf) Cohesion Intercept (psf) Friction Angle (deg) Pore Pressure Paramo Pressure Constant (psf) Piez. Surface No. 1 115.0 121. 0 375.0 29.0 .00 .0 o 1 . A Critical Failure Surface Searching Method, Using A Random Technique For Generating Circular Surfaces, Has Been Specified. 4> 100 Trial Surfaces Have Been Generated. . 10 Surfaces Initiate From Each Of 10 Along The Ground Surface Between X = and X = Points Equally 5.00 ft. 20.00 ft. Spaced ! . Each Surface Terminates Between and x = 35.00 ft. X = 55.00 ft. Unless Further Limitations Were Imposed, The Minimum Elevation At Which A Surface Extends Is Y = 10.00 ft. 5.00 ft. Line Segments Define Each Trial Failure Surface. Restrictions Have Been Imposed Upon The Angle Of'Initiation. The Angle Has Been Restricted Between The Angles Of .-45.0 And -15.0 deg. 1 Following Are Displayed The Failure Surfaces Examined. First. Ten Most critical Of The Trial They Are Ordered - Most critical ; * * Safety Factors Are Calculated By The Modified Janbu Method * * Failure Surface Specified By 9 Coordinate Points point X-Surf Y-Surf No. eft) (ft) 1 6.67 12.00 2 11. 49 10.68 3 16.48 10.35 4 . 21. 44 11. 01 5 26.16 12.64 6 '30.47 15.17 7 34.l9 18.51 8 37.l8 22.52 9 39.29 27.00 *** 2.644 *** Individual data on the lO slices '1 Water Water Tie Tie Earthquake Force Force Force Force Force Surcharge Slice width Weight Top Bot Norm Tan Hor Ver Load No. Ft(ml Lbs(kgl Lbs(k9l Lbs(k9l Lbs(k9l Lbs(k9l Lbs(k9l Lbs (kgl Lbs(k9l 1 3.3 174.5 .0 .0 .0 .0 .0 .0 .0 2 1.5 282.2 .0 .0 .0 .0 .0 .0 .0 3 5.0 2485.2 .0 .0 .0 .0 .0 .0 .0 4 5.0 4400..8 .0 .0 .0 .0 .0 .0 .0 5 4.7 5454.6 .0 .0 .0 .0 .0 .0 .0 6 4.3 5541. 0 .0 .0 .0 .0 .0 .0 .0 7 .5 692.3 .0 .0 .0 .0 .0 .0 .0 8 3.2 36'44.4 .0 .0 .0 .0 .0 .0 .0 9 3.0 2226. 6 .0 .0 .0 .0 .0 .0 .0 10 2.1 543.6 .0 .0 .0 .0 .0 .0 .0 Failure Surface Specified By 10 Coordinate Points Point X-Surf Y-Surf No. eft) (ft) 1 6.67 12.00 2 l1. 44 10.51 3 16.42 10.05 4 21. 39 10.62 5 26.13 12.21 6 30.43 14.75 7 34.12 18.13 ! 8 37.03 22.19 9 39.03 26.77 . .10 39.08 27.00 . *** 2.645 *** 1 Failure Surface Specified By 9 Coordinate Points Point X-Surf Y-Surf No. (ft) (ft) 1 6.67 l2.00 2 11. 45 10.55 3 16.44 lO.20 4 21. 38 10.99 5 26.01 12.86 6 30.11 15.72 7 33.47 19.43 8 35.90 23.79 9 36.84 27.00 *** 2.648 *** B ~ '----- y .00 10.75 A x I s F 43.00 T 53.75 x .00 +---------+ --------+---------+---------+-~-------+ 21.50 8 , 10.75 + 1* 6 8. 21. 6. . .'8 .A 21. 50 + .'1. 6. .87. .21. .8. ., ,.. .l3. :I X 32.25 + .6.8. ...13. ... . .6.8.3. .16. , .... .1' I I . . . . . . . . . ~ 43.00 + '.. .j ...... .... 1 I . .. .. . i S .. , 53.75 + .. .' 64.50 + F 75.25 + T 86.00 + 32.25 * q . ~ .:I- "