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HomeMy WebLinkAboutPD 2020-0050; COLINAS DE ORO HOA SLOPE STABILIZATION; FINAL SOILS REPORT; 2022-01-26 FINAL SOILS REPORT COLINAS DE ORO HOA Slope Failure across from 7927 Calle Madrid Carlsbad, California November 23, 2021 Revised: January 26, 2022 FN 24187-04R 22725 Old Canal Road, Yorba Linda, CA 92887 - (714) 685-3900 - FAX (714) 685-3909 4901 Morena Boulevard, Suite 1110, San Diego, CA 92117 - (858) 450-4040 - FAX (858) 457-0814 3100 Fite Circle, Suite 103, Sacramento, CA 95827 - (916) 368-2088 - FAX (916) 368-2188 5600 Spring Mountain Road, Suite 201, Las Vegas, NV 89146 - (702) 562-5046 - FAX (702) 562-2457 November 23, 2021 File No. 24187-04R Revised January 26, 2022 Ms. Cameron Gonzales COLINAS DE ORO C/O: THE PRESCOTT COMPANIES 5950 La Place Court, Suite 200 Carlsbad, California 92008 Subject: FINAL SOILS REPORT COLINAS DE ORO HOA Slope Failure across from 7927 Calle Madrid Carlsbad, California Reference: “Slope Repair Investigation & Recommendations, Colinas De Oro HOA, Slope Failure across from 7927 Calle Madrid, Carlsbad, California 92009,” prepared by American Geotechnical, Inc., dated August 3, 2020 Dear Ms. Gonzales: In accordance with our contract, American Geotechnical performed testing and observation services during the repair of the subject slope located across from 7927 Calle Madrid, Carlsbad, California. It is our opinion that the repair has been performed in general conformance with our recommendations and based on our review the slope has been rebuilt to its approximate original configuration in conformance with the grades and elevations shown on the project Drawing DWG#528-3Aema. We observed and approved the removal of the slide debris, excavation of the stability keyway and subsequent benches, installation of the back-drain system, placement and compaction of the fill material, placement of geogrid reinforcement every 18-inches vertical, and the installation of erosion control fabric installed on the finished slope surface of the repair. We also performed in-situ relative compaction tests on the fill material placed, and laboratory maximum dry density testing of the import soil used for the repair. Our observations and testing services were performed during the period from October 26 through November 20, 2021. An As-built Slope Repair Plan (Plate 1) and an As-built Repair Cross-Section (Plate 2) showing the approximate limits and construction elements of the repair and the locations of the relative compaction tests performed are presented in Appendix A. A summary table of the relative compaction test and the laboratory test results are presented in Appendix B. Copies of our observation field memos and photographs are attached in Appendix C. :,. ) American Geotechnical, Inc. GEOTECHNICAL ENGINEERING / MATERIALS TESTING & INSPECTION File No. 24187-04R November 23, 2021 Revised January 26, 2022 Page 2 Slope Repair Description The slope repair was performed in accordance with the recommendations contained in our referenced report. The City of Carlsbad Permit Number for the repair is GR2020-0037 and the Drawing Number is DWG#528-3Aema. The repair began with grubbing the slope face to remove all vegetation from within the repair limits, followed by excavation of a stability keyway at the base of the repair. The keyway excavation was observed and approved by a certified engineering geologist before a keyway back drain was installed in accordance with our recommendations. The keyway measures approximately 48-feet long by 10-feet wide by 2-feet deep at the toe. The keyway bottom was tipped back into the slope at approximately 2 percent gradient and Geogrid was placed on the key bottom. A back drain consisting of 4-inch perforated schedule 80 PVC pipe encased in open-grade gravel wrapped in filter fabric was installed at the heel of the keyway with positive drainage gradient and tightlined to the slope face in accordance with our recommendations. The onsite soil excavated during removals was found to have too high of moisture content to achieve the minimum compaction requirement for reuse as fill material in the repair. Therefore, import soil was trucked in and used as fill material for the entire repair, including the keyway, and all of the onsite soil excavated during the repair was removed and exported offsite. The imported soil (yellow fill) consisted of silty sand with gravel, which was reviewed and approved by the project geotechnical engineer for use in the repair. A laboratory maximum dry density test was performed on the yellow fill and used as the proctor for calculating the relative compaction of the fill material placed during the repair. The slope failure above the keyway was removed by benching under the observation and guidance of the project engineering geologist. The basal slide plane of the slope failure was also exposed and removed. Horizontal and vertical benches were then cut into the slope for placement of the fill material with geogrid spaced at 18-inch vertical. Tencate Miragrid 8XT geogrid was utilized for the repair instead of the originally recommended Mirafi BXG 120 or Synteen SF35 because it exceeded the minimum recommended design strength and therefore we approved its use (see Technical Data Sheet, Appendix B). The import fill material was placed with a skip steer and compacted in approximately 6- inch thick lifts with a CAT 304C excavator with a sheep foot roller. In-place density tests were performed on the compacted fill at approximately 18-inch vertical intervals (a minimum of one test per every 50 cubic yards of fill material) using a Nuclear Gage in accordance with ASTM-D2922 and D3017 to determine the relative compaction of the fill. Areas with failing compaction tests were re-worked and re-tested until they met the minimum 90 percent relative compaction requirement. : American Geotechnical, Inc. File No. 24187-04R November 23, 2021 Revised January 26, 2022 Page 3 05/31/21 A second back drain was installed per the project recommendations on a bench located approximately 9-feet above the key bottom. Two 4-foot wide Miradrain 2000 strip drains (chimney drains) were installed up the back-cut benches between the back drains, and a third chimney drain was added up the final back-cut above the second back drain. The chimney drains were terminated approximately 2- feet below the finished slope surface. The repaired slope face was trimmed back to a compacted core and graded to match the adjacent slope gradients per plan. In-place density tests were also performed on the finished slope face. Coconut fiber mats were installed on the slope face for erosion control per the project recommendations. It is our understanding that the repaired slope will be re-planted, and an irrigation system will be restored by others in accordance with our recommendations. Conclusion It is our opinion that the repair has been performed in general conformance with our recommendations. Based on our review the slope has been rebuilt to its approximate original configuration and in conformance with the grades and elevations shown on the project Drawing DWG#528-3Aema. Where tested, the fill material meets the minimum 90 percent relative compaction requirement. A back drain system was installed, and the slope surface has been covered with erosion control fabric. The repaired slope is ready for re-planting. Closure We appreciate the opportunity to be of service. Should you have any questions or concerns, please do not hesitate to contact this office. Sincerely, AMERICAN GEOTECHNICAL, INC. Kevin R. Rogers Fei-Chiu (Jerry) Huang, Ph.D. Chief Geologist Principal Engineer C.E.G. 2425 G.E. 2601 R.C.E. 055670 KR:bp Distribution: Ms. Cameron Gonzales – (1) Via Email Only (Cameron.gonzales@prescottmgt.com) 05/31/22 : American Geotechnical, Inc. APPENDIX A AS-BUILT REPAIR MAP WITH COMPACTION TEST LOCATIONS & CROSS-SECTION ~-.J American Geotechnical, Inc. iez=~~ GEOTECHNICAL ENGINEERING / MATERIALS TESTING & INSPECTION 7925 Calle San Felipe 150 160 El. 168.4 El. 169.4 El. 167.3 AA’AGTP-1 AGTP-2 Slope failure Extent of repair 15’15’ 7927 Calle San Felipe7923 Calle San Felipe Tightline to suitable drainage outlet Chimney drain Chimney drain As-built extent of repair As-builtkeyway As-built Sch 40 PVC back drain As-builtSch 40 PVC back drain Chimney drain (4’ wide Miradrain 2000 strip drain) (4’ wide Miradrain 2000 strip drain)(4’ wide Miradrain 2000 strip drain) 1 2 5 3 4 6 11 12 13 18 16 20 1415 9 8 10 7 REVIEWED BY: DATE "AS BUILT" OTHER APPROVALENGINEER OF WORK CITY APPROVAL RCE EXP. 1 2 GA American Geotechnical, Inc. 22725 Old Canal Road,Yorba Linda, CA 92887 PHONE: (714) 685-3900, FAX: (714) 685-3909 PD2020-0050 528-3A DATE INITIAL TREATMENT PLANS FOR: DATEINSPECTOR CITY OF CARLSBAD INITIALDATE SHEET SHEETS APPROVED: JASON S. GELDERT DWN BY: CHKD BY: PROJECT NO.DRAWING NO.DATE INITIALREVISION DESCRIPTION ENGINEERING DEPARTMENT DATE 1 COLINAS DE ORO HOAAS-BUILT SLOPE STABILIZATION7929 CALLE MADRID, CARLSBAD, CA 92009GR2020-0037 ENGINEERING MANAGER RCE 63912 EXP. 9/30/22 Approx. scale: 5ft0 AGTP-2Legend Approximate location of cross section Approximate limits of slope failure Approximate location of test pit A A’ Original topo per As-Graded Plan by Leighton & Assoc.,Inc. (8/29/84) N 160 Approximate location of as-built Schedule 40 PVC back drain repairand direction of ow 20 Approximate extent of as-builtkeyway Approximate location of density test Approximate extent of as-builtrepair zone. Re-grade slopesurface to match the surroundingarea slope Approximate location of as-builtchimney drain As-Built SlopeRepair Map Colinas De Oro HOA Carlsbad, CAF.N. 24187.04 Plate 1 AmericanGeotechnical,Inc. 7929 Calle Madrid GA 1/20/22 12/31/22RCE055670 C) ------------- I I I I I I I I I I I I I I I C) -"'--,i -_.__ A-- ---- ----------------e------------------ ,------=--!-.:-!_ '_I"!",r, ... / I I I I I I , ..,'L- I I ,----cl -,-- ' I ~---- ------ I I I I I I I ~----.~ I ----I ---I --I I I I -----------------0 I I ._,, . .,., I I I I I I ' I I I I C) ~:;:.-.::~/ ~1"'· ~---;,.,'? I I '~-~ '~--' I □· --- .-----. I I 1 ____ .. --[8] A ---c:::J-- l""""'------J 5'M~rlcc©111 G~@tecclirilcciiil, Ince. t===t==±=====================t==~~==t====F=~ ------------- -11 II Approx. scale: 1”=4’ 4ft0 2 ? ? AGTP-2 AGTP-1 As-graded topo7925 Calle San Felipe Failure surface Slope failure debris Pre-development topo Sidewalk Pale yellow sand lifts Per As-Built Grading Plansll key = 5’ deep x 20’ wide Clayey Fill Clayey Fill Clayey Fill Del Mar Formation Mudstone with inter-bedded Sandstone Existing ground cracks A’A 155 160 165 170 135 140 145 150 155 160 165 170 135 140 145 150 N56W 5’ Head scarp Backdrain construction: 8’ vertical spacing 4” diameter perforated Schedule 40 PVC drain pipe installed with perforations down and encased in 2 cu.ft. per linear foot of open graded gravel wrapped in geo-lter fabric (e.g. Mira 140N or similar) Maintain positive drainage pitch (4% min.) Bench height to be approx. 2-3’ and horizontal cut-back approx. 3-5’ and should be tipped back at approx. 10% Roll geogrid up if benchwidth is less than 3m (min. 10’) wide Backdrain placedat heel of key As-built Tencate Mira Miragrid 8XT @ 18” max. vertical spacing, tipped at 10% into slope. Overlapped splices at min. of 6”. ADS 00C2TT (Coconut ber) Geosynthetics Erosion Control Blanket, ECB. Anchor with 3/8 x 10” bright spikes with pan washers at 48” max. spacing. Lap fabric 6” at splices. Min. 4% Min. 4% Min. key width 3m (min. 10’) Min. 2’Tightline to suitable drainageoutlet Chimney drain (4’ wide Miradrain 2000 strip drain) DATE INITIAL TREATMENT PLANS FOR: REVIEWED BY: DATEINSPECTOR DATE "AS BUILT" CITY OF CARLSBAD OTHER APPROVAL INITIALDATE SHEET SHEETS APPROVED: JASON S. GELDERT DWN BY: CHKD BY: PROJECT NO.DRAWING NO. ENGINEER OF WORK DATE INITIAL CITY APPROVALREVISION DESCRIPTION ENGINEERING DEPARTMENT RCE EXP. DATE 1 COLINAS DE ORO HOAAS-BUILT SLOPE STABILIZATION7929 CALLE MADRID, CARLSBAD, CA 92009GR2020-0037 ENGINEERING MANAGER RCE 63912 EXP. 9/30/22 2 2 GA American Geotechnical, Inc. 22725 Old Canal Road,Yorba Linda, CA 92887 PHONE: (714) 685-3900, FAX: (714) 685-3909 PD2020-0050 528-3A As-Built Cross Section A-A’Repair Concept Colinas De Oro HOA Carlsbad, CAF.N. 24187.04 Plate 2 AmericanGeotechnical,Inc. 7929 Calle Madrid GA RCE055670 12/31/22 1/20/22 -1~---1 - -------------- 7 - - - - l l l T l - ----r ·-·- --- I ·--·-I ·-·-, ___ ....... 1, ........ j, ' I I I ----- 7 I r L,=r==----=---=---==:::i-, ___ _J ,---~ I - [ / l - ·-·-·-, __ --. \ ·-- ~ _-,..... I ~~· ,~---... _ I ---..:.-~ --.... ---~--=:.::-....... l ""'T,--~ . ,_ -~~ ~- " .... _____ r-r-I - I ---j I ~ _r-----~ - ----- - l ' I 7 L__ J I I I I I I I I I I -• D D 11 II APPENDIX B RELATIVE COMPACTION AND LABORATORY TEST SUMMARIES & TENCATE MIRAGRID 8XT GEOGRID TECHNICAL DATA SHEET ~-.J American Geotechnical, Inc. iez=~~ GEOTECHNICAL ENGINEERING / MATERIALS TESTING & INSPECTION American Geotechnical Compaction Test Data Valdez Residence FN: 23035.10 Test Date Test Type Location Height above Key bottom (ft) Percent Moisture Field Dry Density (pcf) Lab Max Density (pcf) Relative Compaction (%)Soil Type Remarks 1 11/3/21 N Keyway +1 7.8 112.7 128.0 88 Import Yellow Fill Fail 2 11/4/21 N Keyway +1 7.4 117.5 128.0 92 Import Yellow Fill Pass - Retest #1 3 11/5/21 N Keyway +1.5 7.0 123.5 128.0 97 Import Yellow Fill Pass 4 11/6/21 N Keyway +1.5 6.4 117.8 128.0 92 Import Yellow Fill Pass511/7/21 N Keyway +3 8.7 117.9 128.0 92 Import Yellow Fill Pass 6 11/8/21 N Keyway +4.5 9.8 111.5 128.0 87 Import Yellow Fill Pass 7 11/9/21 N Keyway +4.5 8.1 116.3 128.0 91 Import Yellow Fill Pass 8 11/10/21 N Fill bench +6 7.5 116.7 128.0 91 Import Yellow Fill Pass 9 11/11/21 N Fill bench +7.5 6.8 112.9 128.0 88 Import Yellow Fill Fail 10 11/12/21 N Fill bench +7.5 7.6 115.5 128.0 90 Import Yellow Fill Pass-Retest #9 11 11/13/21 N Fill bench +9 8.0 118.5 128.0 93 Import Yellow Fill Pass 12 11/14/21 N Fill bench +10 7.1 116.0 128.0 91 Import Yellow Fill Pass 13 11/15/21 N Fill bench +11 7.6 116.6 128.0 91 Import Yellow Fill Pass1411/16/21 N Fill bench +12.5 6.6 112.7 128.0 88 Import Yellow Fill Pass 15 11/17/21 N Fill bench +12.5 8.2 114.7 128.0 90 Import Yellow Fill Pass1611/18/21 N Fill bench +14 8.3 115.9 128.0 91 Import Yellow Fill Pass 17 11/19/21 N Fill bench +15.5 8.2 115.3 128.0 90 Import Yellow Fill Pass 18 11/20/21 N Slope face +12 7.9 116.1 128.0 91 Import Yellow Fill Pass 19 11/21/21 N Fill bench +17 7.1 116.0 128.0 91 Import Yellow Fill Pass 20 11/22/21 N Slope face +15 7.3 118.9 128.0 93 Import Yellow Fill Pass MAXIMUM DENSITY ASTM D-1557 Project Name:Colinas De Oro Excavation:Stockpile Location:Common Area Slope Repair Depth:Stockpile File No:24187-04 Description:Brownish Yellow-Gravelly Clayey Sand w. Coarse Gravell Date Sampled:11/3/2021 Tested By:RH Date Tested:11/5/2021 RH Sieve Size 3/4 1568#3 Mold Size 6 in % Retained No. of Layers 5 Method C Test point number 1 2 3 4 5 Added Water g / %Dry Back As Is 2%4% Wt. wet soil + mold g 7241 7458 7725 7595 Wt. of mold g 2866 2866 2866 2866 Wt. wet of soil g 4375 4592 4859 4729 Wet density pcf 128.01 134.36 142.17 138.37 Dry density pcf 119.71 123.39 128.32 122.65 Moisture Determination (Oven) Container number 1 1 1 1 Wt. wet of soil+tare g 681.3 681.3 681.3 681.3 Dry wt. soil+tare g 648.9 640.5 632.6 624.5 Tare wt.g 181.3 181.3 181.3 181.3 Wt. of moisture g 32.40 40.80 48.70 56.80 Dry wt. of soil g 467.60 459.20 451.30 443.20 Moisture Content %6.93 8.89 10.79 12.82 Maximum Density 128.3 pcf Optimum Moisture 10.8 % Sample Number: Reviewed By: (4.1%) Run As Is 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0Dry Density (pcf)Moisture % Max Density SG=2.8 SG=2.7 SG=2.6 Zero Air Voids Curves Maximum DensityD1557 RH 3-9-21 I American Geotechnical, Inc. GEOTECHNICAL ENGINEERING I MATERIALS TESTI G & INSPECTION " h I I I I -----t----t---1t--t---"'"~'""'111(P rt 1 __ w_w_;-___ w_w_:--.i+"""ll""'~:"I!""\:• MAXIMUM DENSITY ASTM D-1557 Project Name:Colinas De Oro Excavation:Bulk Sample Location:Common Area Slope Repair Depth:Stockpile File No:24187-04 Description:Mottled Yell/Orange/Brn Olive-Silty Clay w. Claystone w.t Sand Date Sampled:10/28/2021 Tested By:RH Date Tested:10/29/2021 RH Sieve Size #4 1567#2 Mold Size 4 in % Retained 1 No. of Layers 5 Method A Test point number 1 2 3 4 5 Added Water g / %Dry Back Dryback+2%As Is 2% Wt. wet soil + mold g 3905 3970 3981 3940 Wt. of mold g 2017 2017 2017 2017 Wt. wet of soil g 1888 1953 1964 1923 Wet density pcf 124.29 128.57 129.30 126.60 Dry density pcf 108.63 110.57 109.26 105.08 Moisture Determination (Oven) Container number 1 1 1 1 Wt. wet of soil+tare g 215.8 215.8 215.8 215.8 Dry wt. soil+tare g 203.2 201.8 200.3 198.8 Tare wt.g 115.8 115.8 115.8 115.8 Wt. of moisture g 12.60 14.00 15.50 17.00 Dry wt. of soil g 87.40 86.00 84.50 83.00 Moisture Content %14.42 16.28 18.34 20.48 Maximum Density 110.6 pcf Optimum Moisture 16.3 % Sample Number: Reviewed By: 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0Dry Density (pcf)Moisture % Max Density SG=2.8 SG=2.7 SG=2.6 Zero Air Voids Curves Maximum DensityD1557 RH 3-9-21 American Geotechnical, Inc. GEOTECHNICAL ENGINEERING I MATERIALS TESTI G & INSPECTION I " h I I I I -----t----t---1t--t---"'"~'""'111(P rt 1 __ w_w_;-___ w_w_:--.i+"""ll""'~:"I!""\:• '--:-:----:-:-~~~ -:-:----:-:----:-:----:-:--· -------~ :m-----------·--~~~--~~----~~--~-'' ~~-~--~~----~~---.--.--.--, -, y -µ""' -ll--+--l'f-➔'-+-----+--+-'-1-'-+--➔l-+--➔'-+'-+--1 ' ' ~•~e-+--+-1--+--➔l-+--➔-+--+----+-l--+--➔f-~ 365 South Holland Drive Tel +1 706 693 2226 Pendergrass, GA 30567 www.tencategeo.us Miragrid® 8XT Disclaimer: TenCate assumes no liability for the accuracy or completeness of this information or for the ultimate use by the purchaser. TenCate disclaims any and all express, implied, or statutory standards, warranties or guarantees, including without limitation any implied warranty as to merchantability or fitness for a particular purpose or arising from a course of dealing or usage of trade as to any equipment, materials, or information furnished herewith. This document should not be construed as engineering advice. Mirafi® is a registered trademark of Nicolon Corporation. Copyright © 2021 Nicolon Corporation. All Rights Reserved FGS000067 ETQR25 Miragrid® 8XT geogrid is composed of high molecular weight, high tenacity polyester multifilament yarns woven in tension and finished with a PVC coating. Miragrid® 8XT geogrid is inert to biological degradation and resistant to naturally encountered chemicals, alkalis, and acids. Miragrid® 8XT geogrid is used as soil reinforcement in MSE structures such as segmental retaining walls, precast modular block walls, wire faced walls, geosynthetic wrapped faced walls and steepened slopes. Miragrid® 8XT is also used in MSE stabilized platforms for voids bridging, embankments on soft soils, landfill veneer stability, reducing differential settlement and for foundation seismic stability. TenCate Geosynthetics Americas is accredited by Geosynthetic Accreditation Institute – Laboratory Accreditation Program (GAI-LAP). MECHANICAL PROPERTIES TEST METHOD UNIT MINIMUM AVERAGE ROLL VALUE MD Tensile Strength @ Ultimate ASTM D6637(Method B) lbs/ft (kN/m) 7400 (108.0) Tensile Strength @ 5% strain ASTM D6637(Method B) lbs/ft (kN/m) 2520 (36.8) Mass/Unit Area1 (ASTM D5261) oz/yd2 (g/m2) 10.8 (366) MINIMUM ROLL VALUE Creep Rupture Strength2 ASTM D5262/D6992 lbs/ft (kN/m) 5139 (75.1) Long Term Design Strength3 lbs/ft (kN/m) 4449 (64.9) PHYSICAL PROPERTIES UNIT ROLL CHARACTERISTIC Roll Dimensions4 (width x length) ft (m) 6 x 300 (1.8 x 91) 12 x 200 (3.6 x 61) 12 X 1000 (3.6 x 305) Roll Area yd2 (m2) 200 (168) 267 (220) 1333 (1114) Estimated Roll Weight lbs (kg) 140 (64) 205 (93) 975 (442) Label Roll Color WHITE 1 Typical Value 2 75-year design life based on NTPEP Report REGEO-2016-01-066. 3 Long Term Design Strength for sand, silt, clay. RFCR = 1.44; RFID = 1.05; RFD = 1.1 (Installation damage reduction factor for other soils available upon request). 4 Special order roll lengths are available upon request ~TENCATE Mirafi ® SOil RWlfORCfM E!ff ~TENCATE GEOSYNTHETICS APPENDIX C – OBSERVATION MEMOS AND PHOTOGRAPHS ~-.J American Geotechnical, Inc. iez=~~ GEOTECHNICAL ENGINEERING / MATERIALS TESTING & INSPECTION Site Observation Photos - Slope Repair - JS 11-17-21 (1) Site Observation Photos - Slope Repair - JS 11-17-21 (2) 24187-04 Colinas De Oro HOAAmerican Geotechnical, Inc. Ii OT A lff Ill " ;T A, 1T 11,, I Site Observation Photos - Slope Repair - JS 11-17-21 (3) Site Observation Photos - Slope Repair - JS 11-17-21 (4) 24187-04 Colinas De Oro HOAAmerican Geotechnical, Inc. Ii OT A lff Ill " ;T A, 1T 11,, I Site Observation Photos - Slope Repair - JS 11-17-21 (5) Site Observation Photos - Slope Repair - JS 11-17-21 (6) 24187-04 Colinas De Oro HOAAmerican Geotechnical, Inc. Ii OT A lff Ill " ;T A, 1T 11,, I Site Observation Photos - Slope Repair - JS 11-17-21 (7) 24187-04 Colinas De Oro HOAAmerican Geotechnical, Inc. Ii OT A lff Ill " ;T A, 1T 11,, I Site Observation Photos - Slope Repair - JS 11-16-21 (1) Site Observation Photos - Slope Repair - JS 11-16-21 (2) 24187-04 Colinas De Oro HOAAmerican Geotechnical, Inc. Ii OT A lff Ill " ;T A, 1T 11,, I Site Observation Photos - Slope Repair - JS 11-16-21 (3) Site Observation Photos - Slope Repair - JS 11-16-21 (4) 24187-04 Colinas De Oro HOAAmerican Geotechnical, Inc. Ii OT A lff Ill " ;T A, 1T 11,, I Site Observation Photos - Slope Repair - JS 11-16-21 (5) Site Observation Photos - Slope Repair - JS 11-16-21 (6) 24187-04 Colinas De Oro HOAAmerican Geotechnical, Inc. Ii OT A lff Ill " ;T A, 1T 11,, I Site Observation Photos - Slope Repair - JS 11-16-21 (7) 24187-04 Colinas De Oro HOAAmerican Geotechnical, Inc. Ii OT A lff Ill " ;T A, 1T 11,, I Observation Photos - Slope Repair - KR 11-15-21 (1) Observation Photos - Slope Repair - KR 11-15-21 (2) 24187-04 Colinas De Oro HOAAmerican Geotechnical, Inc. Ii OT A lff Ill " ;T A, 1T 11,, I Observation Photos - Slope Repair - KR 11-15-21 (3) Observation Photos - Slope Repair - KR 11-15-21 (4) 24187-04 Colinas De Oro HOAAmerican Geotechnical, Inc. Ii OT A lff Ill " ;T A, 1T 11,, I Observation Photos - Slope Repair - KR 11-15-21 (5) Observation Photos - Slope Repair - KR 11-15-21 (6) 24187-04 Colinas De Oro HOAAmerican Geotechnical, Inc. Ii OT A lff Ill " ;T A, 1T 11,, I Observation Photos - Slope Repair - KR 11-15-21 (7) Observation Photos - Slope Repair - KR 11-15-21 (8) 24187-04 Colinas De Oro HOAAmerican Geotechnical, Inc. Ii OT A lff Ill " ;T A, 1T 11,, I Observation Photos - Slope Repair - KR 11-15-21 (9) Observation Photos - Slope Repair - KR 11-15-21 (10) 24187-04 Colinas De Oro HOAAmerican Geotechnical, Inc. Ii OT A lff Ill " ;T A, 1T 11,, I Observation Photos - Slope Repair - KR 11-15-21 (11) Observation Photos - Slope Repair - KR 11-15-21 (12) 24187-04 Colinas De Oro HOAAmerican Geotechnical, Inc. Ii OT A lff Ill " ;T A, 1T 11,, I Observation Photos - Slope Repair - KR 11-15-21 (13) Observation Photos - Slope Repair - KR 11-15-21 (14) 24187-04 Colinas De Oro HOAAmerican Geotechnical, Inc. Ii OT A lff Ill " ;T A, 1T 11,, I Observation Photos - Slope Repair - KR 11-15-21 (15) Observation Photos - Slope Repair - KR 11-15-21 (16) 24187-04 Colinas De Oro HOAAmerican Geotechnical, Inc. Ii OT A lff Ill " ;T A, 1T 11,, I Observation Photos - Slope Repair - KR 11-15-21 (17) Observation Photos - Slope Repair - KR 11-15-21 (18) 24187-04 Colinas De Oro HOAAmerican Geotechnical, Inc. Ii OT A lff Ill " ;T A, 1T 11,, I Observation Photos - Slope Repair - KR 11-15-21 (19) Observation Photos - Slope Repair - KR 11-15-21 (20) 24187-04 Colinas De Oro HOAAmerican Geotechnical, Inc. Ii OT A lff Ill " ;T A, 1T 11,, I Observation Photos - Slope Repair - KR 11-15-21 (21) Observation Photos - Slope Repair - KR 11-15-21 (22) 24187-04 Colinas De Oro HOAAmerican Geotechnical, Inc. Ii OT A lff Ill " ;T A, 1T 11,, I Site Observation Photos - Slope Repair - JS 11-12-21 (1) Site Observation Photos - Slope Repair - JS 11-12-21 (2) 24187-04 Colinas De Oro HOAAmerican Geotechnical, Inc. Ii OT A lff Ill " ;T A, 1T 11,, I Site Observation Photos - Slope Repair - JS 11-12-21 (3) 24187-04 Colinas De Oro HOAAmerican Geotechnical, Inc. Ii OT A lff Ill " ;T A, 1T 11,, I Site Observation Photos - Slope Repair - JS 11-10-21 (1) Site Observation Photos - Slope Repair - JS 11-10-21 (2) 24187-04 Colinas De Oro HOAAmerican Geotechnical, Inc. Ii OT A lff Ill " ;T A, 1T 11,, I Site Observation Photos - Slope Repair - JS 11-10-21 (3) Site Observation Photos - Slope Repair - JS 11-10-21 (4) 24187-04 Colinas De Oro HOAAmerican Geotechnical, Inc. 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