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HomeMy WebLinkAboutGeotechnical Review of Rough Grading Plans Sept. 23, 1996PETRA COSTA MESA • AGOURA HILLS • SAN DIEGO • RANCHO CALIFORNIA • PALMDALE September 23, 1996 J.N. 298-87 a R.H. ACQUISITION 11920 Currituck Dr. Los Angeles, CA 90049 Attention: Mr. Steve Ford Subject: Geotechnical Review of Rough Grading Plans, Tract No. 23064-3, n County of Riverside, California. nu References: See attached list. I� Gentlemen: In response to a 'Plan Check Corrections" list prepared by the County of Riverside Department of Building and Safety, Grading Division, our firm has reviewed the rough grading plans for Tract No. 23064-3 prepared by Trans Pacific Consultants (plans dated 5-21-90). The purpose of this review was to evaluate the geotechnical aspects of the proposed grading, including the stability of planned cut and fill slopes. The county reviewer has also requested copies of Reference Nos. 2 and 5. Therefore, we are forwarding copies of the reports to the County. PROPOSED GRADING Mass cut and fill grading is proposed within Tract No. 23064-3 to develop 120 ' residential lots and associated access streets and slopes. Maximum planned vertical depths of cut and fill below and above existing grades are approximately ® 35 feet and 50 feet, respectively. However, following removal of low density alluvial materials in tributary drainages, the resultant maximum depth of compacted fill will be approximately 55 to 60 feet. PETRA GEOTECHNICAL, INC 3185-A Airway Avenue Costa Mesa, CA 92626 Tel: (714) 549-8921 Fax (714) 549-1438 R.H. ACQUISITION September 23, 1996 J.N. 298-87 Page 2 Cut and fill slopes are planned at a maximum ratio of 2:1 (horizontal to vertical). The maximum proposed cut slope height is approximately 35 feet and the maximum proposed fill slope height is approximately 50 feet. Mid -slope terrace drains are proposed on all graded slopes exceeding a height of 30 feet. SUBSURFACE SOIL AND BEDROCK CONDITIONS The subject tract is underlain by late Pleistocene sedimentary bedrock materials belonging to the Pauba Formation. In tributary drainages, the Pauba Formation is overlain with low density surficial deposits of recent alluvium, colluvium and/or slopewash. In the topographically higher areas, the Pauba Formation is mantled with a relatively thin layer of weathered bedrock (residual soil). A detailed description of the above materials is provided in Reference No. 5. GRADING RECOMMENDATIONS The "Earthwork" recommendations presented in Reference No. 5 remain applicable for the site; however, structural fills have already been placed in several areas along the edges of the adjacent golf course fairways. These compacted fills were placed under the purview of this firm in accordance with the recommendations presented in Reference No. 2. SLOPE STABILITY CALCULATIONS Slope stability calculations have been performed for the proposed 2:1 cut and fill slopes for their respective maximum planned heights (35 feet and 50 feet). Shear strength parameters for compacted fill and Pauba Formation bedrock materials are based on laboratory test data presented in Reference No. 5. The weakest shear strength values determined for remolded soils and in situ bedrock were used in the calculations. A summary of these values is presented below: R.H. ACQUISITION 1. Compacted Fill ' Angle of internal friction = 34° Cohesion = 100 psf Saturated unit weight = 120 pcf ' 2. In Situ Bedrock September 23, 1996 J.N. 298-87 Page 3 ' Angle of internal friction = 36° Cohesion = 590 psf Saturated unit weight = 120 pcf Under static loading conditions, factors of safety exceeding 1.5 were determined for both cut and fill slopes. A fault hazard area has been defined along the westerly tract boundary. Therefore, a horizontal seismic coefficient of 0.2g was used in the calculations to evaluate pseudo -dynamic loading conditions. These calculations resulted in factors of safety exceeding 1.1 for both cut and fill slopes. ' The calculations are attached to this report. CONCLUSIONS AND RECOMMENDATIONS Grading Plan Review Based on our review of the grading plans, the plans were found to have been prepared in accordance with our recommendations presented in Reference No. 5 and are considered acceptable from a geotechnical point of view. Cut and Fill Slope Stability Cut slopes will expose Pauba Formation bedrock materials consisting of dense to locally very dense, massive, fine to coarse-grained sandstone and silty sand- stone with occasional gravel and silt beds. Structurally, the bedrock is generally void of significant adverse bedding. Therefore, based on the structure of the It R.H. ACQUISITION September 23, 1996 J.N. 298-87 Page 4 bedrock and stability calculations, all cut slopes are expected to be grossly stable; however, as noted in Reference No. 5, all cut slopes should be observed by the project engineering geologist to confirm favorable geologic conditions. Based on stability calculations, all fill slopes are expected to be grossly stable provided they are constructed in accordance with the recommendations presented in Reference No. 5. All cut and fill slopes are also expected to be surficially stable and to remain so under normal conditions, and provided they are landscaped and maintained thereafter in accordance with the recommendations presented in Reference No. 5. Evaluation of Soil/Bedrock Expansion Potential and Plasticity Index Onsite soil and bedrock materials exhibit expansion potentials varying from VERY LOW to MEDIUM. Therefore, as recommended in Reference No. 5, expansive soil and bedrock conditions will have to evaluated on a lot by lot basis during and at the completion of rough grading. In addition to evaluating expansive soil and bedrock conditions, Section 1803.2 of the 1994 U.B.C. specifies that special design considerations (conforming to Section 1815) are required for soils with an expansion index greater than 20 (LOW expansion potential and greater). The special design considerations are based on the effective plasticity index for the upper 15 feet of the soil layers underlying the building sites. Therefore, determination of the plasticity index for soils with an expansion index greater than 20 located in the upper 15 feet of the building sites will also be required during grading. it R.H. ACQUISITION September 23, 1996 J.N. 298-87 Page 5 We trust the comments and recommendations presented herein adequately address the information requested by reviewer for the County of Riverside. Should you have any questions, please do not hesitate to call. Respectfully submitted, INC. President Engineerin Geologist CEG 936 CB/AB/SJ/jtd =:1896\200\28&970.REV Siamak Jafroudi, PhD Principal Engineer GE 2024 No. GE 002024 Exp. 6/W/00 1. Evaluation of Faulting and Liquefaction Potential, Portion of Wolf Valley Project, Rancho California, County of Riverside, California; report by Earth Research Associates, Inc., dated November 20, 1987. ' 2. Removal Requirements for Structural Fills Adjacent to Golf Course Fairway Numbers 1, 2, 3, 4, 8 and 18, Redhawk Project, Rancho California, County of Riverside, Califor- nia; report by Earth Research Associates, Inc., dated January 18, 1988. 3. Preliminary Soils Engineering and Engineering Geologic Investigation, Redhawk Project, Rancho California, County of Riverside, California; report by Earth Research Associates, Inc., dated February 2, 1988. 4. Supplemental Evaluation of Faulting, Southwest Portion of Redhawk Project, Rancho California Area, County of Riverside, California; report by Petra Geotechnical, Inc., dated March 1, 1989. 1 5. Supplemental Soils Engineering and Engineering Geologic Investigation, Portion of Redhawk Project, Vesting Tentative Tract Map Nos. 23064, 23065, 23066, and 23067, Rancho California, County of Riverside, California; report by Petra Geotechnical, Inc., dated May 8, 1989. 1 PETRA GEOTECHNICAL, INC. ' J.N. 298-87 " STABL6H •• by Purdue University --Slope Stability Analysis -- Simplified Janbu, Simplified Bishop or Spencer's Method of Slices Run Date: 09-20-96 Time of Run: 4:59pm Run By: Petra Geotechnical, Inc. Input Data Filename: D:FILL-S.IN Output Filename: D:FILL-S.OUT Plotted Output Filename: D:FILL-S.PLT PROBLEM DESCRIPTION Tract 23064-3: Static stability analysis of 50 -foot high fill slope BOUNDARY COORDINATES 5 Top Boundaries 5 Total Boundaries Boundary X -Left No. (ft) 1 .00 2 20.00 3 70.00 4 76.00 5 126.00 Y -Left X -Right Y -Right Soil Type (ft) (ft) (ft) Below Bnd 25.00 20.00 25.00 1 25.00 70.00 50.00 1 50.00 76.00 50.00 1 50.00 126.00 75.00 1 75.00 200.00 75.00 1 ISOTROPIC SOIL PARAMETERS 1 Type(s) of Soil Soil Total Saturated Cohesion Friction Pore Pressure Piez. Type Unit Wt. Unit Wt. Intercept Angle Pressure Constant Surface No. (pcf) (pcf) (psf) (deg) Param. (psf) No. 1 120.0 120.0 100.0 34.0 .00 .0 0 A Critical Failure Surface Searching Method, Using A Random Technique For Generating Circular Surfaces, Has Been Specified. 200 Trial Surfaces Have Been Generated. 10 Surfaces Initiate From Each Of 20 Points Equally Spaced Along The Ground Surface Between X - 15.00 ft. and X - 25.00 ft. Each Surface Terminates Between X - 130.00 ft. and X - 180.00 ft. Unless Further Limitations Were Imposed, The Minimum Elevation At Which A Surface Extends Is Y = .00 ft. 10.00 ft. Line Segments Define Each Trial Failure Surface. Plate A-1 • • Safety Factors Are Calculated By The Modified Bishop Method Failure Surface Specified By 15 Coordinate Points Point X -Surf Y -Surf No. (ft) (ft) 1 22.90 26.45 2 32.85 27.43 ' 3 42.74 28.88 4 52.56 30.80 5 62.27 33.18 6 71.86 36.02 7 81.30 39.30 8 '90.58 43.03 9 99.68 47.19 10 108.56 51.77 11 117.22 56.78 12 125.64 62.18 13 133.79 67.97 14 141.65 74.15 15 142.64 75.00 Circle Center At X 7.1 ; Y 237.6 and Radius, 211.7 +•+ 1.892 ••• Plate A-2 Y -Axis (f t) I Tract 23064-3: Static stability analysis of 50 -foot high fill slope Ten Most Critical. C:FILL-5.PLT By: Petra Geotechnical 09-20-96 298-87 # FS a 1.89 Label h 1.89 Fill c 1 .90 d 1 .93 e 1 .93 f 1.94 s 1.95 h 1.96 1 1.96 1 2.03 I Total Saturated Cohesion Friction Pore Pressure Piez. e Unit Mt. Unit Mt. Intercept Angle Pressure Constant Surface (qf) (qf) (p�ssff) ( ep) ParOam. (ppf) No. Ih i 1 H 40 80 120 160 PCSTABL5M FSmin=1.89 X -Axis (ft) Factors Of Safety Calculated By The Modified Bishop Method r1R •* STABL6H by Purdue University --Slope Stability Analysis -- Simplified Tanbu, Simplified Bishop or Spencer's Method of Slices Run Date: 09-20-96 Time of Run: 5:00pm Run By: Petra Geotechnical, Inc. Input Data Filename: D:FILL-6.IN Output Filename: D:FILL-6.OUT Plotted Output Filename: D:FILL-6.PLT PROBLEM DESCRIPTION Tr. 23064-3: Seismic stability analysis of 50 -foot high fill slope BOUNDARY COORDINATES 5 Top Boundaries 5 Total Boundaries Boundary X -Left No. (ft) 1 .00 2 20.00 3 70.00 4 76.00 5 126.00 ISOTROPIC SOIL PARAMETERS 1 Type(s) of Soil Y -Left X -Right Y -Right Soil Type (ft) (ft) (ft) Below End 25.00 20.00 25.00 1 25.00 70.00 50.00 1 50.00 76.00 50.00 1 50.00 126.00 75.00 1 75.00 200.00 75.00 1 Soil Total Saturated Cohesion Friction Pore Pressure Piez. Type Unit Wt. Unit Wt. Intercept Angle Pressure Constant Surface No. (pcf) (pcf) (psf) (deg) Param. (psf) No. 1 120.0 120.0 100.0 34.0 .00 .0 0 A Horizontal Earthquake Loading Coefficient Of .200 Has Been Assigned A Vertical Earthquake Loading Coefficient Of .000 Has Been Assigned Cavitation Pressure - .0 psf A Critical Failure Surface Searching Method, Using A Random Technique For Generating Circular Surfaces, Has Been Specified. 200 Trial Surfaces Have Been Generated. 10 Surfaces Initiate From Each Of 20 Points Equally Spaced Along The Ground Surface Between X = 15.00 ft. and X = 25.00 ft. Plate A-4 Each Surface Terminates Between X = 130.00 ft. and X - 180.00 ft. Unless Further Limitations Were Imposed, The Minimum Elevation At Which A Surface Extends Is Y - .00 ft. 10.00 ft. Line Segments Define Each Trial Failure Surface. + + Safety Factors Are Calculated By The Modified Bishop Method + Failure Surface Specified By 15 Coordinate Points Point X -Surf Y -Surf No. (ft) (ft) 1 22.90 26.45 2 32.85 27.43 3 42.74 28.88 4 52.56 30.80 5 62.27 33.18 6 71.86 36.02 7 81.30 39.30 8 90.58 43.03 9 99.68 47.19 10 108.56 51.77 11 117.22 56.78 12 125.64 62.18 13 133.79 67.97 14 141.65 74.15 15 142.64 75.00 Circle Center At X = 7.1 ; Y 237.6 and Radius, 211.7 •+• 1.203 •+• Plate A-5 Y -Axis (f t) Tr. 23064-3: Seismic stability analysis of 50 -foot high fill slope Ten Most Critical. C:FILL-6.PLT By: Petra Geotechnical 09-20-96 298-87 A FS a 1.20 Label b 1.20 Fill e 1.21 d 1.24 e 1.24 f 1.25 g 1.25 h 1.25 1 1.25 1 Total Saturated Cohesion Friction Pore Pressure Piez. e Unit Mt. Unit Wt. Intercept Angle Pressure Constant Surface (4c20f) (qf) (p��) (deg) Perm (psCf) No. 40 80 120 160 PCSTABL5M FSmin=1.20 X -Axis (ft) Factors Of Safety Calculated By The Modified Bishop Method 200 •• STABL6H •• by Purdue University --Slope Stability Analysis -- Simplified Janbu, Simplified Bishop or Spencers Method of Slices Run Date: 09-20-96 Time of Run: 5:13pm Run By: Petra Geotechnical, Inc. Input Data Filename: D:CUT-S.IN Output Filename: D:CUT-S.OUT Plotted Output Filename: D:CUT-S.PLT PROBLEM DESCRIPTION Tract 23064-3: Static stability analysis of 35 -foot high cut slope BOUNDARY COORDINATES 5 Top Boundaries 5 Total Boundaries Boundary X -Left No. (ft) 1 .00 2 10.00 3 50.00 4 56.00 5 86.00 Y -Left X -Right Y -Right Soil Type (ft) (ft) (ft) Below End 20.00 10.00 20.00 1 20.00 50.00 40.00 1 40.00 56.00 40.00 1 40.00 86.00 55.00 1 55.00 120.00 55.00 1 ISOTROPIC SOIL PARAMETERS 1 Type(s) of Soil Soil Total Saturated Cohesion Friction Pore Pressure Piez. Type Unit Wt. Unit Wt. Intercept Angle Pressure Constant Surface No. (pcf) (pcf) (psf) (deg) Param. (psf) No. 1 120.0 120.0 590.0 36.0 .00 .0 0 A Critical Failure Surface Searching Method, Using A Random Technique For Generating Circular Surfaces, Has Been Specified. 200 Trial Surfaces Have Been Generated. 10 Surfaces Initiate From Each Of 20 Points Equally Spaced Along The Ground Surface Between X - 5.00 ft. and X - 15.00 ft. Each Surface Terminates Between X - 90.00 ft. and X - 110.00 ft. Unless Further Limitations Were Imposed, The Minimum Elevation At Which A Surface Extends Is Y - .00 ft. 5.00 ft. Line Segments Define Each Trial Failure Surface. Plate A-7 + ` Safety Factors Are Calculated By The Modified Bishop Method + Failure Surface Specified By 22 Coordinate Points Point X -Surf Y -Surf Mo. (ft) (ft) 1 10.26 20.13 2 15.16 19.11 3 20.11 18.39 4 25.09 17.97 5 30.09 17.87 6 35.08 18.07 7 40.06 18.58 8 44.99 19.39 9 49.86 20.51 10 54.66 21.93 11 59.36 23.64 12 63.94 25.64 13 68.39 27.91 14 72.70 30.46 15 76.84 33.26 16 80.79 36.32 17 84.55 39.61 18 88.11 43.13 19 91.43 46.86 20 94.52 50.79 21 97.37 54.91 22 97.42 55.00 Circle Center At X = 29.3 Y 98.9 and Radius, 81.0 `++ 3.335 +`+ Plate A-8 Y -Axis (f t) Tract 23064-3: Static stability analysis of 35 -foot high cut slope Ten Most Critical. C:CUT-5.PLT By: Petra Geotechnical 09-20-96 298-87 0 20 40 60 80 100 PCSTABL5M FSmin=3.34 X -Axis (ft) Factors Of Safety Calculated By The Modified Bishop Method 120 b FS Soil Total Saturated Cohesion Friction Pore Pressure Piez. a 3.34 b 3.34 e 3.34 Label Tyype No. Bedrock 1 Unit Wt. (pcf) 120 Unit Wt. Intercept (pcf) (psf) 120 59036 Angle . (da ) Pressure ParOam. Constant Surface (pssf) No. d 3.35 e 3.35 f 3.35 a 3.37 h 3.37 t 3.37 1 3.37 i ho t Y 0 20 40 60 80 100 PCSTABL5M FSmin=3.34 X -Axis (ft) Factors Of Safety Calculated By The Modified Bishop Method 120 •* STABL6H •• by Purdue University --Slope Stability Analysis -- Simplified Janbu, Simplified Bishop or Spencer's Method of Slices Run Date: 09-20-96 Time of Run: 5:33pm Run By: Petra Geotechnical, Inc. Input Data Filename: D:CUT-6.IN Output Filename: D:CUT-6.OUT Plotted Output Filename: D:CUT-6.PLT PROBLEM DESCRIPTION Tr. 23064-3: Seismic stability analysis of 35 -foot high cut slope BOUNDARY COORDINATES 5 Top Boundaries 5 Total Boundaries Boundary X -Left Y -Left X -Right Y -Right Soil Type No. (ft) (ft) (ft) (ft) Below End 1 .00 20.00 10.00 20.00 1 2 10.00 20.00 50.00 40.00 1 3 50.00 40.00 56.00 40.00 1 4 56.00 40.00 86.00 55.00 1 5 86.00 55.00 120.00 55.00 1 ISOTROPIC SOIL PARAMETERS 1 Type(s) of Soil Soil Total Saturated Cohesion Friction Pore Pressure Piez. Type Unit Wt. Unit Wt. Intercept Angle Pressure Constant Surface No. (pcf) (pcf) (pef) (deg) Param. (pef) No. 1 120.0 120.0 590.0 36.0 .00 .0 0 A Horizontal Earthquake Loading Coefficient Of .200 Has Been Assigned A Vertical Earthquake Loading Coefficient Of .000 Has Been Assigned Cavitation Pressure - .0 psf A Critical Failure Surface Searching Method, Using A Random Technique For Generating Circular Surfaces, Has Been Specified. 200 Trial Surfaces Have Been Generated. 10 Surfaces Initiate From Each Of 20 Points Equally Spaced Along The Ground Surface Between X - 5.00 ft. and X - 15.00 ft. Plate A-10 T_Q a3o�?y -3 Each Surface Terminates Between x - 90.00 ft. and X = 110.00 ft. Unless Further Limitations Were Imposed, The Minimum Elevation At which A Surface Extends Is Y - .00 ft. 5.00 ft. Line Segments Define Each Trial Failure Surface. ` + Safety Factors Are Calculated By The Modified Bishop Method + Failure Surface Specified By 23 Coordinate Pointe Point x -Surf Y -Surf No. (ft) (ft) 1 9.74 20.00 2 14.68 19.23 3 19.65 18.71 4 24.64 18.44 5 29.64 18.42 6 34.64 18.65 7 39.62 19.13 8 44.56 19.86 9 49.47 20.84 10 54.31 22.05 11 59.10 23.52 12 63.80 25.21 13 68.41 27.14 14 72.92 29.30 15 77.32 31.69 16 81.59 34.28 17 85.72 37.09 18 89.71 40.11 19 93.55 43.32 20 97.22 46.71 21 100.71 50.29 22 104.02 54.04 23 104.79 55.00 Circle Center At x 27.5 ; Y 118.3 and Radius, 99.9 2.150 ••• Plate A-11 Y -Axis (f t) Tr. 23064-3: Seismic stability analysis of 35 -foot high cut slope Ten Most Critical. C:CUT-6.PLT By: Petra Geotechnical 09-20-96 298-87 0 h a I i f ■ d Ib C _ 0 20 40 60 80 100 PCSTABL5M FSmin=2,15 X -Axis (ft) Factors Of Safety Calculated By The Modified Bishop Method 120 # FS Soil Total Saturated Cohesion Friction Pore Pressure P1ez. ■ 2,15 b 2.16No c 2.16 Label Type Bedrock 1 Unit Mt. (pcf) 120 Unit Mt. Intercept (Pct) (psf) 120 590 Angle (deg) 36 Pressure Param. 0 Constant Surface (psf) No. 0 d 2.16 a 2.16 f 2.17 o 2.17 b 2.17 1 2.17 1 2.18 0 h a I i f ■ d Ib C _ 0 20 40 60 80 100 PCSTABL5M FSmin=2,15 X -Axis (ft) Factors Of Safety Calculated By The Modified Bishop Method 120 NTATIVE TRACT / I NTATIVE CD) IF ZA A GIR-1ADoMG AND DIP_\'�AIMAGE PLA LEGAL DESCRIPTION PORTION OF THE LITTLE TEMECULA RANCHO, IN THE COUNTY OF RIVERSIDE, STATE OF CALIFORNIA AS SHOWN BY THE MAP OF PARTITION OF SAID RANCHO ON FILE IN THE OFFICE OF THE COUNTY CLERK OF SAN DIEGO COUNTY, CALIFORNIA; o-' -- ----------r-� -- -- - -- - __._—_ -_--_-- --..-._.___._.._.-.-_.. _.-_. ____`__ -- - _-.. .. __ __ _ ___ _ _ __ -_---- __ _ _ -- -- - --------- - - .. , •- STEFFEY ASO, D _ J f s ) i926=7 M ; '' SD•. ��� .. •�•1• .1 i \ Qal SID Q p5 6p_ 6d 9D' _ - 60' I� 0330 h32 h32 3 x,326 325 °324 ti°323 h322 X32/ 'i4320 -56 �334Q 33 h332�33/ ti CCS C� Q F� F �I LC N 36 U 335 _ • �'3 0337"' � 12395 !240.5 /24/6 /?42.6 /144.0 /245.0 /2460 /247.?4B: /2495 /2505 /1520 /252. /2525 /2510 (� qe f B-55 - 5 ' �\ / 3 p 82375 12385 S 5S' SO 53 SO Qal FC � lJ L/ \ 00 0 S La ,� ► \ f5 °a Q pS O N ihEN UPS sD / s. 54 342 34 • \ / TP -18 CR=/&011 "- „ �,' �o ,sa' s°' a3 Q \ �4�''1, � L n 60 5S' SS' SO" 55'S0" Qal C TP -162 4 150 15z /1515 /151 /15? 6 ^ I I i Q - - ' -� 43A 5 y�G 60' 60 5 /P39.5 /2405 /2420 /243.0 /244.5 V245.5 ./2 - 2 0 0 �. o /37 n l38 0/39 /40 5 'C' I 45a 12 Ir 1238 0 /3 ° 0/33 °/34 ° o g v� �� 35/, jKo 1349 3 N �°6� l30 so 55 ` / 01 1235 4S' / 0 I ------ �/ ��s h ,• o `Y s ' /23.0 / 1 � g6df 12 6 0 � - - -/ s P Q tiAm-STREE-T � -0 � fpS _ - o o ,/ ps � TP -158 �13h2a2s'/�390 ; s ' , s' 60' \ 8-54 � �R�i000' � �� I �� ` _ - $ P A C� a , 1/?36.0 1/233.0 =s 6° Z Q al o_,. 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CTP -140 IaD �?�3 55 55' S5' ' 6O, T,T`Ej+ _ o e0' jj �0�\ �, a. 12' 12' 12' 312 a' B o si3 a ipp o b /?945/59 h - D h Z 52531.iy o 47 5�' y 1.5% 5% 0 Es )TP-1415736 � \ I �z4o � 6 - 56 70,' 55 � 2p IAS "� p /TP -142 - - S TREE T SECT/ON - -0I I.- -- - d.YPACE- CONSTRUCTED 4 360 j _ I \•• rAOIF �►�� pA0 1 0 760 aL Q 926-200-' 6 - II' MAINTENANCE EASEMENT-- ' MAINTENANCE EASEM T TEINEOU�A NCHOS F o R*'" I • loo' S 50 \ SO I - 41• 41 9 2 7 7 14 12 8 5 4 Lu - 4 4 r OC< l J SX, 1 1.516 1.5% 5% VVVP�A� w i SHEET M\�5: .. � � - .a. - ,- .wq4.. -Y -tic.-�'_•iPti�... UV00 LkmC[ O F Lk. I ti i STREET SECT/ON WOLF VALLEY OOP B BUTTERFIELD STAGE ROAD CONST UCTED BY A. D. NO. 159 / MF=[M SONO M77 %7 0 O FF�ON'T �s 7��[��� LEGEND 0-- STREET LIGHT LL PATI' �J NOTE THIS MAP CONTAINS ALL COTIGUOUS OWNERSHIP IAKE MATHEWS �� V LAr E RERR.S SAN JACINTO PERRiS ` HEMET S ]+ 1+ i !� ALBERHILL O WINCH�STEH sr -- - - 'f CITY LAKE ELSINONE T I LAKE 5KIN SH qNL,, FAA 15 1,L� 7 9 9 VOLF VALLEY LOOP Mica) M ='7 � � - (S7 Rc�� LAKE ,_� Project- Site CAMP PENDLETON L -T _ 15 r RAINBOW .e MF N d, y / 0 NfILL FALLBROOK " LAKE 5 PAUMA VALLEY i� F! ]6 9 \ SEE PLATE 23064-1 FOR L END `�1^ Petra Geotechnical, Inc. 7ZA305, Co (PoI GEOTECHNICAL MAP TRACT I CD) IF ZA A GIR-1ADoMG AND DIP_\'�AIMAGE PLA LEGAL DESCRIPTION PORTION OF THE LITTLE TEMECULA RANCHO, IN THE COUNTY OF RIVERSIDE, STATE OF CALIFORNIA AS SHOWN BY THE MAP OF PARTITION OF SAID RANCHO ON FILE IN THE OFFICE OF THE COUNTY CLERK OF SAN DIEGO COUNTY, CALIFORNIA; o-' -- ----------r-� -- -- - -- - __._—_ -_--_-- --..-._.___._.._.-.-_.. _.-_. ____`__ -- - _-.. .. __ __ _ ___ _ _ __ -_---- __ _ _ -- -- - --------- - - .. , •- STEFFEY ASO, D _ J f s ) i926=7 M ; '' SD•. ��� .. •�•1• .1 i \ Qal SID Q p5 6p_ 6d 9D' _ - 60' I� 0330 h32 h32 3 x,326 325 °324 ti°323 h322 X32/ 'i4320 -56 �334Q 33 h332�33/ ti CCS C� Q F� F �I LC N 36 U 335 _ • �'3 0337"' � 12395 !240.5 /24/6 /?42.6 /144.0 /245.0 /2460 /247.?4B: /2495 /2505 /1520 /252. /2525 /2510 (� qe f B-55 - 5 ' �\ / 3 p 82375 12385 S 5S' SO 53 SO Qal FC � lJ L/ \ 00 0 S La ,� ► \ f5 °a Q pS O N ihEN UPS sD / s. 54 342 34 • \ / TP -18 CR=/&011 "- „ �,' �o ,sa' s°' a3 Q \ �4�''1, � L n 60 5S' SS' SO" 55'S0" Qal C TP -162 4 150 15z /1515 /151 /15? 6 ^ I I i Q - - ' -� 43A 5 y�G 60' 60 5 /P39.5 /2405 /2420 /243.0 /244.5 V245.5 ./2 - 2 0 0 �. o /37 n l38 0/39 /40 5 'C' I 45a 12 Ir 1238 0 /3 ° 0/33 °/34 ° o g v� �� 35/, jKo 1349 3 N �°6� l30 so 55 ` / 01 1235 4S' / 0 I ------ �/ ��s h ,• o `Y s ' /23.0 / 1 � g6df 12 6 0 � - - -/ s P Q tiAm-STREE-T � -0 � fpS _ - o o ,/ ps � TP -158 �13h2a2s'/�390 ; s ' , s' 60' \ 8-54 � �R�i000' � �� I �� ` _ - $ P A C� a , 1/?36.0 1/233.0 =s 6° Z Q al o_,. E N `v ` r h o /// i f/2 Ih 1, 6� �% cii'� la//3 1Y//4 h//5 �0 Sao �Zsa 4` ( 359 C✓ D - I - I I o '16 // 1264moll 9� - \ e � 0 _ 1Z 2205;.1 SD p ��� `^ so 1/1 60's so' 60 PS. TP -160 s`C Qps /- c r- 5 TP -15 5y d° h /08 .w m— L1.J CIO W W C!D RE VI S IONS DATE NO. DE-SCR/PT10A1 //29 /68/� CHAN6-ED 0 RAD/US FROM 900',-0 556" DEVELOPER OWNER GREAT AMERICAN DEVELOPMENT COMPANY 28910 RANCHO CALIFORNIA ROAD SUITE 204 TEMECULA,CA. 92390 1-714-0 3606 BY GENERAL NOTES THOMAS BROS COORD 126 - A-6, B-6, C-6, D-6, E-6 136 - B-6, C -6,D-6, E-6 PROPOSED USE RES./ SCHOOL/ COMMERCIAL /MULTI FAMILY EXISTING ZONING: R -R PROPOSED ZONING: S -P-- �.,srw+.1...+- ....r---EVSTING USE_,..'��`�� TOTAL S F.D D LOTS 351 TOTAL MULTI FAMILY LOT 5 TOTAL ACRES 247 ACI TOTAL SCHOOL LOT I TOTAL OPEN SPACE LOT 3 TOTAL PAVED AREA 14 ACRES MINIMUM LOT SIZE 5000 SO FT. i• DENSITY UTILITIES SEWER: E. M W.D. WATER: R.C.W.D. _ GAS: SO CALIF. GAS ELECTRIC: SO. CALIF. EDISON TELEPHONE' GENERAL TELEPHONE Iz� D al 16 c ,2yF '-, ?5"O /?59S °/Q5 s a1 A . P . N. 926-180-005 /?6p0 0 /03 o ' �' 60 6a' - - __ .T' ^*'�--- - _ . 926 - 190-001 /- a = TP -157 _ - . - — - - F. X90 /1S , _� A ao 3 = 1 � , � � ,__ ._. _ � ---___-_ _----- -- -- -_ _ - R/ W r. 926 200 005 P-13 p 0 z u ° E� b 12yy 4 / ' �, VE -NUE 0' /, 2,3 ` R/ W R/w R/w 66 - -- 917 - 310-001,002,003 S--$ I 79 � 8p h An, .44 �s 6s' S �1��� 30 30 33• 22' 33' 1T - 25°° 6 -53 22 yp.0 DJ - 77 , _ _ 'mesio ss So. SS.;� 10/ z 20 B 20' 10 - - 11 - zY — --- - Qy 3 p '4 h a 55 - 40 _ 40' ° ,� - 1!Q' ° �Za i263a 5' 6' 10' 12' 12' 10' r " 2 a l24B 5 so G , 60 n a ° `w 9p 9/ /PGy� e6 SD 4i a 9'/ 7' lxlu 12' e a 4' \ SD oo' ! ti . 92 0 931 5 5% 5% 1. 1 j yaq i jr", 3 'E \� "_ SD o E —12 0 aro 'i(/ ! 111I V (%� p° •)c1V N i N r/{N' 10 �i \ 2 p� 1 /�� p oo e o.. fr "M a I I 3 ? o �a _ N v m 3 60 ti \ - - - - \ti _ / p• 5O, /SDD TP -13 al m 60 as I9D, c /p , -o - 5 70 135, 65' �•10,90 25 v TP -155 h h ^" N\� 29 ' Ss' SPAM 5 so ao 0 62 ko STREET SECTION \ S3' s i /3p, 6`/ �� _ STREET SECT/ON 4 MEASEMENNCE 74 ' 73'° T2 7/ 7O ° �' 0 13010 4p yr 4 MAIN' NCE EASEMENT 1NTER10R STREETS � 0 69 0 � - ;�,, A CHDATE STREET ?99.0%?945 /2956 /pSoS /1975 /?9Bs / \ 6�0 66. �� 6q �`� 130' Q I R! R/W 3 X7, N %, 95' o. 1g 3a �' 3e,3 Is /-1os�1 ,� ya, 0 h I �c Q ea' CD $ a n SHADY � N ¢ P: kyr' S, SS •se, Vl 65 � h��h 60 � /1 � ..�t 44 44' - M QQc 32' 6. CTP -140 IaD �?�3 55 55' S5' ' 6O, T,T`Ej+ _ o e0' jj �0�\ �, a. 12' 12' 12' 312 a' B o si3 a ipp o b /?945/59 h - D h Z 52531.iy o 47 5�' y 1.5% 5% 0 Es )TP-1415736 � \ I �z4o � 6 - 56 70,' 55 � 2p IAS "� p /TP -142 - - S TREE T SECT/ON - -0I I.- -- - d.YPACE- CONSTRUCTED 4 360 j _ I \•• rAOIF �►�� pA0 1 0 760 aL Q 926-200-' 6 - II' MAINTENANCE EASEMENT-- ' MAINTENANCE EASEM T TEINEOU�A NCHOS F o R*'" I • loo' S 50 \ SO I - 41• 41 9 2 7 7 14 12 8 5 4 Lu - 4 4 r OC< l J SX, 1 1.516 1.5% 5% VVVP�A� w i SHEET M\�5: .. � � - .a. - ,- .wq4.. -Y -tic.-�'_•iPti�... UV00 LkmC[ O F Lk. I ti i STREET SECT/ON WOLF VALLEY OOP B BUTTERFIELD STAGE ROAD CONST UCTED BY A. D. NO. 159 / MF=[M SONO M77 %7 0 O FF�ON'T �s 7��[��� LEGEND 0-- STREET LIGHT LL PATI' �J NOTE THIS MAP CONTAINS ALL COTIGUOUS OWNERSHIP IAKE MATHEWS �� V LAr E RERR.S SAN JACINTO PERRiS ` HEMET S ]+ 1+ i !� ALBERHILL O WINCH�STEH sr -- - - 'f CITY LAKE ELSINONE T I LAKE 5KIN SH qNL,, FAA 15 1,L� 7 9 9 VOLF VALLEY LOOP Mica) M ='7 � � - (S7 Rc�� LAKE ,_� Project- Site CAMP PENDLETON L -T _ 15 r RAINBOW .e MF N d, y / 0 NfILL FALLBROOK " LAKE 5 PAUMA VALLEY i� F! ]6 9 \ SEE PLATE 23064-1 FOR L END `�1^ Petra Geotechnical, Inc. 7ZA305, Co (PoI GEOTECHNICAL MAP 0 I Y . f I T TIVE TRAC VESTING. TEN A1 NO23065 is I • M 1. r 1 a n p p Ln1 L�.. d C RC7 9 AD HGAND D p AGE LAN LEGAL DESCRIPTION i -t I / \ BE/NG A DlV/5/ON OF rHAT PORT/ON OF Tf1 i TP 131 t / j �.:. A RANCHO TEiL1ECULA /N T/!E COUNT y OF Pl/DE, STATE OF CAC/PORN/A A5 PER MAP RECORD -132 5 , TP -223 TP -222 / �• ` IN BOOK /3 PAGE 60/ OF MAPS IN TNF Off/ } • (S _ I _ J . \, Of T!!E COUNTY kECORDER OF SAN D/EGO C 0 U/V T y CAL /PORN/A. l f�•i �i - / 3j i l -- � � TP -225: pi Q ps ti Qal �5. _ CCual T _ 3 ve,�CP / ME 61 P-216 I p � S / fp Q04 .\ Or / MP3 Y6s• 9' - �`�a/r� I \,\\.` TP -235 1'�4 / ��� ���\ 2 t TP -129 ;'�©/ CD F�q/ _ ifs �� - ❑ T 236 o B_44 _• "S6' s� !� 186 ` /J� 90\ g\IPA ` R612 K I 1 izz/ 0 1225 5 _ 1 • l / �h - �i I q' _ ��Q / / '�s• / , rs _ ; 2 8 1 -- \ \ ��s Og �9 \ � TP 12 ,� j/o / i' Qal� 1 Qp$ j0/ ` o .o TP -234, COURTS F 1 � 160. -� � a� � 0 �- �- \ ��r i - I v �T 17 = -a _ ro �� h �\ o / / o �' P-229 i ,1, �' -9 IT / �\ Qal �'' \'rr �qo \ ho. g - - 90' x �\`,\ - N �d.� 183 ! 17 �TP-23 _ /2260 P-123 Q �` N _ ��� �O o �'' / 03/p \ / / cP �I ��• 5' na' /zs ! 14%' / % c o/aa200' 0 LoeU 60' 176' 177 % 175 a/,j1„5?O _ J �- z• .1 � � o Flo S � t O B il ~ 17 21! Q ' / / '. TP =202q \ o a . ,� ____� Bim\ • , _ 0 0 o IA7 �j $1 y� � OG� n ? S c� , TO_ %� A° iiS• ^ , l0 TP -7 IMP, �J 6 ��--TP-207 If � �3 rr , R/W 8-49• � B-45 ���,, / � ;i9`�o � sS, 1 sa. .�?lal.' O o C 1 � - �__ 30 •o• , 3 �J °° , ;� o ss. , s' �P-23� I 73 , --- - /6.9 a /D TP- s ' ssn 6 j 60 _ \ _ - rNn �' °�° 168 - �✓02t11 t a•!10'/6' 8/ 7 zo 1e2 /u Y 0 - 0 �$ 4Zt )i ^ O I V �r �. W QO q JI - - Y/ TP -240 -,Oso ;: � � � a �•7 -� �,3/ a _ � - - 1 Xz - - p 1 ��' _ �2_ - X100 \` 2 u /aJ tl1 Pq Vim-' O =� °N' ( ae��,�o P_ 31 1 R/W 1- STREET C TION i0, = loo , - ZZ, 44"�T- 19 r� j a I o oo� u � pS. /N TER/OR Yf-ETS R/W �. .St7► ,: -q - t 66 cs_ 13-, ZQ r '� - CfS u I O/00 y // ` S 7T a t0 22' 22' \tib• -Il t - a �- u * VI / t 6/s _ - - ) al on I � %'No 1 27PIP I Y ` `rI01tlM1111M111U1i1111101111111111110111111V1111111/lU g11Ou.•a111111111111111111 �f +�+vv..v-.�'}�__ �.f/�� i' - .,ptir� •� t I I -� .ey - _ �f� ► \ U l _ v ON I'FREE Ts t NOW, B-46 ��III !�� .� /gid � m � � �`•e, � � 1 L--4- .�. �� I- � I � r `�� � /�. ` / � /•yNut•A[•.n. R'Wtl1Yp'[Ml•Kt51Z•'P[ttl(Hfgmn��WlxMeIMM"'1rMM1Y1Y• i��11W1uyr,,,,yO1MMu MR LOP 401 ";0000 op 00I 1'00I �► 400007 0000 rGEOTECHN.yl . ■ H E N• 1 — — — _ — l�.NCH � �CIFIC Er':a•�INEERING — Z7780 FRONT S — E T UITE N�•� — TE U A CALIFORNIA �Z 30— '71 � —67� �40Z4 i R/W REVISIONS DATE NO." DESCRIPTION 4-88 ADD 50. 84RA'/ER 67R/P ALON/s SO!/Thl aCRy , CHANGE 107• NO'S. 5-88 2 REV'/SE P,4LA ,?D WIDTH ADO OR6 SPACE LOTS L079 , RFM01IFD RA20R05F0 10EOHAN6A RO.i Y DEVELOPER OWNER GREAT AMERICAN DEVELOPMENT COMPANY 28910 RANCHO CALIFORNIA ROAD SUITE 204 TEMECULA , CA. 92390 1714 •�99 - 3606 J ., By:-/ t GENERAL NOTES THOMAS BROS COORD 126 - A-6, B-6, C-6, D-6, E-6 136- B-6, C -6,D-6, E-6 PROPOSED USE: RES./ COMMERCIAL, MULTI - FAMILY- EXISTING AMILY•EXISTI G ZONIN -- PROP S D7(5NING: S -P- EXISTING USE VACANT , TOTAL PARK SITE 3 TOTAL S.F.D D. LOTS 608 TOTAL_ MULTI. FAMILY LOT= 4 TOTAL. ACRES 224 AC. f TOTAL OPEN SPACE LOTS TOTAL COMMERCIAL LOT: 2 TOTAL PAVED AREA 23 AC. f MINIMUM LOT SIZE 4,400 SO FT UTILITIES SEWER E. M W O. WATER: R.C.W.D. GASI S0. CALIF GAS C0 ELECTRIC: SO. CALIF EDISON TELEPHONE-GENER4L TELEPHONE A . P. N. 926- 180 - 005,926- 190- 001 _ 926- I & Q - 926- 200-035,`038,0429 043 926- 430-004;006 916- 380-001 --012 926- 420-002, 004,005,006 5 007 926-350-004-014 926-200-005,006 LEGEND O-- STREET LIGHT ; LOCATION NOTE THIS MAP CONTAINS ALL CONTIGUOUS OWNERSHIP VEST I NG. TENTAT R f AP N A D 1 ' 1220�\ / - / ryry - o / \ - l f ` �� y --� LEGAL DESCRIPTION PORTION OF THE LITTLE TEMEC RANCHO, IN v �- - '� --- __ ____ - -" _ THE COUNTY OF RIVERSIDE, STAT � F CALIFORNIA L �Q s�,93. ___ -- AS SHOWN BY THE MAP OF DA ON OF SAID C 1\ = f -- \ - RANCHO ON FILE IN THE OFFICE O THE COUNTY 1 , GOLF VALLEY LOOP ._,� ( 1, 1 CLERK OF SAN DIEGO COUNTY, C FORNIA; \ rr �. .,Sn y � 1 w , w , r- _.. ll _. SHEET INDEX 3 o 360 s `��. ; �` C� <' �a , / S, ss . s�yys f�0 r \ r \\ _ \\ — 4 , _ TP 2 GOLF COURSE afc� • ;9 � o , - ' aSy s .o r77� �., \ l a 6 s -/°sr ` o - �} ( / i TP 144 FA I RVVAY 4 ', O s / 9 r ` TP -24;- Qal J` 9PSTP-1idial v� F< c ammumm r 1 / O s \ `�\ SD O ?�9 - \\\ \ \ TP 134 ac B9 Ilk r/ *4 �- - r_'_TP-248 5�5 ! P 37 �Dc�� r, TP -138 I ♦\` , 'Op I 'a i \� ' - /?�V s \ ` \ `, ` �44/' • 11,A V I \ .� \ \ •' \� �/ ilk 11 '' ,\ TP -136 '' / ''d ` ZO q;• / . i N 4ALP — __ _ __ w - — _ ¢vo TP 13 TP -139 �o -242 TP -24_ 3 _ Z. a O '` Qpo »' ` •� a �- _i \ ' /dp' 4 � \, v � ro -mo , \ +4 _�?O ti .\ _ eoSd � -------_ � -1250 t •���0� ��, • / O 1 � J 5 / ` u , s / p'_ /t a.. .i p� ! / �.f J y_ __ I♦ r \ , a _ iI�g�.5 , V N / q ;y0 � \ p l � o, ao - ,. %� �. � 242.5 �5 JsP I 11 1 --- � � _iL- IZ��� •� /,,� �.fl QPS TP -140 _ r ? 9n \. _ — SQ.- = U -_ _ — 9 1.5 p / go fo 3 r a O a m v IO �`' ? ; ' 6 �" aq'9� \9� • Op - n R - - / 1�5 �[ /' / 'a 1 5 fit �, s �rJ 2� J , _ G -. - _ �� `I�+- �;` \I = �' S5, _ ^., - _ P-141 O - - ` 1j . 13 J. V, Q B_ � Z6t v 2g '2�: t 4 V �� O 1 (fsa'J v \ I �� 11 / 1 \`\ \ryp �/ i 1?7 ' `�, \ � Ln ^u. V - ) O ` � Jq� '�' -�. - ' �S! i ; ' - ___ -__28� -- _ -- �✓�-. `I-- 7t\ it \ _ W . 00'= o \6, � - �� / �h6 S' � <tn �O'�'Or � � � --- �2,� _ _ _ - - �� \ If 1 `(� O- � /168 - m - ( 3 1 .�' _ • /[[�/;0 I %/,5�, I /' -. \ ,, _ N iT. o- �•�' ( ' ~� 300., O J i�6.9 �'/T/ 2L J_1 __. -_+!` ____� / // 1 - O i i _ _-_ ' O 11,�/.l7 v J \ I ro �`, 'e 1 ��j N� `. i ��•`! '>< 1i?QQ% I 5 - r.w 1 b n, \` ''. \ � ema ,MV � �y / � / '�,°p I e�b�.�! iq 1. _ - _ - �-'- _ � /�186 , l .'j � N�� ' 11 `�`,. � , „5 � '- - .,1 6 � 8 -- /284 �1"/ P•�1 \ - �. T l •r t"- • �' m - 1 90 1 \ c ^' 9f ' �0 12 p �'.. J. i /�/1► -_. 1 0 �1 - _ _t \ b _ 1 1^ /Ie \ I 1 ( 1 / I • C C - i 1:13G 0 /�' 3s /2!l u, 12 5 6 , _ o I \ .\ / \ / \\ .. y ' l / I 150 9. 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NpQpCo �NCHO - �C1=1C ENGINEERING - SHEET 2 0 SEE PLATE 23064-1 FOR LEGEND Petra Geotechnical, Inc. 3 I I I 1. GEOTECHNICAL MAP J.N. 298-87 APRIL, 1989 PLATE 23067-3 aQ[lor= o �o�� f iVESTING D r. j TENTAT 926r-380-008aE HANSON, 926-380-007 926— 380-011 HERRICK HANSON, 926-380-0 HERRICK MIRABEL, I MIRABAL, — WILFRED f WILFRED A N N N GRAD NO AN\] 6870 926-420-007 ANDERSON, CHARLES c _ _ _ ... .. .� .:_...�.. •_r --•- � - -- •-•.+.-...� - -- '� .. �_. "^ ""'"^""'+.'"""""�,`_..�._s,,.r.t•�.:.-+-._._�._..-..._y-�`+.--.w.-...- ....--..-r. •.,,wr,�.,r.e„�„wsv:T.�-..-...__..a.,._. _-...- -----.-_.-- - __ A • -� � +�.w!_.. 4YAMMt:�FMOw. .is�Yi .ai•+4r _ }^' ...... -_.. :.r•ti � . �.�.. .. ! 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GEOTECHNICAL MAP I J.N. 298-87 I APRIL, 1989 I 15LATE-23067-4 R5