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Home My WebLink About2275 NOB HILL DR; ; CBR2022-3707; PermitBuilding Permit Finaled Residential Permit Print Date: 09/16/2025 Job Address: Permit Type: Parcel#: Valuation: Occupancy Group: #of Dwelling Units: Bedrooms: Bathrooms: Occupant Load: Code Edition: Sprinkled: Project Title: 2275 NOB HILL DR, CARLSBAD, CA 92008-1138 BLDG-Residential Work Class: 1671122000 Track #: $10,689.00 Lot#: Project#: Plan#: Construction Type: Orig. Plan Check#: Plan Check #: Retaining Wall Description: MUELLER: AS-BUILT RETAINING WALLS 6'H (3 WALLS) TERRACING (CC2022-0256) Applicant: Property Owner: DAVID MUELLER 2275 NOB HILL DR CARLSBAD, CA 92008-1138 CO-OWNERS DAVID AND CHRISTINE MUELLER 2275 NOB HILL DR CARLSBAD, CA 92008-1138 (949) 753-7525 FEE BUILDING PLAN REVIEW -MINOR PROJECTS (LOE) BUILDING PLAN REVIEW -MINOR PROJECTS (PLN) RETAINING WALL-NON-ENGINEERED -CITY STANDARD RETAINING WALL-NON-ENGINEERED-CITY STANDARD RETAINING WALL PLAN CHECK FEE SB1473 -GREEN BUILDING STATE STANDARDS FEE STRONG MOTION -RESIDENTIAL (SMIP) Total Fees: $1,060.39 Total Payments To Date: $1,060.39 Permit No: Status: {city of Carlsbad CBR2022-3707 Closed -Fi naled Applied: 10/06/2022 Issued: 06/13/2025 Finaled Close Out: 09/16/2025 Final Inspection: 07/03/2025 INSPECTOR: de Roggenbuke, Dirk Balance Due: AMOUNT $194.00 $98.00 $158.00 $158.00 $450.00 $1.00 $1.39 $0.00 Please take NOTICE that approval of your project includes t he "Imposition" of fees, dedications, reservations, or other exactions hereafter collectively referred to as "fees/exaction." You have 90 days from the date this permit was issued to protest imposition of these fees/exactions. If you protest them, you must follow the prot est procedures set forth in Government Code Section 66020(a), and file the protest and any other required information with t he City Manager for processing in accordance with Carlsbad Municipal Code Section 3.32.030. Failure to timely follow that procedure will bar any subsequent legal action to attack, review, set aside, void, or annul their imposition. You are hereby FURTHER NOTIFIED that your right to protest the specified fees/exactions DOES NOT APPLY to water and sewer connection fees and capacity changes, nor planning, zoning, grading or other similar application processing or service fees in connection with this project. NOR DOES IT APPLY to any fees/exactions of which you have previously been given a NOTICE similar to this, or as to which the statute of limit ation has previously otherwise expired. Building Division Page 1 of 1 1635 Faraday Avenue, Carlsbad CA 92008-7314 I 442-339-2719 I 760-602-8560 f I www.carlsbadca.gov { City of Carlsbad RESIDENTIAL BUILDING PERMIT APPLICATION 8-1 Est. Value PC Deposit ....:c,$..:..-..'f._.,_E{)""'"'-+' _?"" __ _ Date __._.I l""Jj'-'(p.....,....j __ z"-"::z_.=-- Job Address 2275 Nob Hill Drive Suite: APN: 167-112-20-00 ---- CT /Project #: Nob Hill Lot#: 11 ---- Fire Sprinklers: 0 YES 0 NO Air Conditioning: 0 YES 0 NO Electrical Panel Upgrade: 0 YES 0 NO BRIEF DESCRIPTION OF WORK: Application for existing retaining walls completed between 2017 and 2020. 0 Addition/New: _____ Living SF, ___ Deck SF, ___ Patio SF, ____ Garage SF Is this to create an Accessory Dwelling Unit? 0 Y 0 N New Fireplace? 0 Y 0 N , if yes how many? __ O Remodel: _____ SF of affected area Is the area a conversion or change of use? 0 Y O N 0 Pool/Spa: ____ SF Additional Gas or Electrical Features? ____________ _ o solar: ___ KW, __ Modules, Mounted:O RoofOGround, Tilt:O YON, RMA:OYON, Battery:OY ON, Panel Upgrade: OY ON D Reroof: _________________________________ _ D Plumbing/Mechanical/Electrical Only: --------------------------0 Other: Installation of retaining walls to stabilize slope and existing Eucalyptus trees on edge of slope. APPLICANT (PRIMARY CONTACT) Name: David Mueller Address: 2275 Nob Hill City: Nob Hill Drive State: CA Zip: 92008 Phone: 949-310-8499 Email: dmueller@pcioc.com DESIGN PROFESSIONAL Name: Not Applicable Address : ________________ _ City: ________ State: ___ .Zip: ____ _ Phone: ________________ _ Email: _________________ _ Architect State License: ___________ _ PROPERTY OWNER Name: David Mueller Address: 2275 Nob Hill Drive City: Carlsbad Phone: 949-310-8499 Email: dmueller@pcioc.com CONTRACTOR BUSINESS Name: Not Applicable State: CA Zip: 92008 Address: __________________ _ City: ________ State: ___ Zip: ______ _ Phone: ___________________ _ Email: ___________________ _ State License: ______ Bus. License: ______ _ (Sec. 7031.5 Business and Professions Code: Any City or County which requires a permit to construct, alter, improve, demolish or repair any structure, prior to its issuance, also requires the applicant for such permit to file a signed statement that he/she is licensed pursuant to the provisions of the Contractor's License Law {Chapter 9, commending with Section 7000 of Division 3 of the Business and Professions Code} or that he/she is exempt therefrom, and the basis for the alleged exemption. Any violation of Section 7031.5 by any applicant for a permit subjects the applicant to a civil penalty of not more than five hundred dollars {$500)). 1635 Faraday Ave Carlsbad, CA 92008 Ph: 760-602-2719 Fax: 760-602-8558 Email: Building@carlsbadca.gov B-1 Page 1 of 2 Rev. 03/20 ( OPTION A): WORKERS'COMPENSATION DECLARATION: I hearby affirm under penalty af perjury one af the following declarations: 0 I have and will maintain a certificate of consent to self-insure for workers' compensation provided by Section 3700 of the Labor Code, for the performance of the work which this permit is issued. 0 I have and will maintain worker's compensation, as required by Section 3700 of the Labor Code, for the performance of the work for which this permit is issued. My workers' compensation insurance carrier and policy number are: Insurance Company Name: ____________________ _ Policy No. ______________ Expiration Date: _________ _ D Certificate of Exemption: I certify that in the performance of the work for which this permit is issued, I shall not employ any person in any manner so as to be come subject to the workers' compensation Laws of California. WARNING: Failure to secure workers compensation coverage is unlawful, and shall subject an employer to criminal penalties and civil fines up to $100,000.00, in addition the to the cost of compensation, damages as provided for in Section 3706 of the Labor Code, interest and attorney's fees. CONTRACTOR SIGNATURE: [JAGENT DATE: --------------------------------- ( OPTION B ): OWNER-BUILDER DECLARATION: I hereby affirm that I am exempt from Contractor's License Law far the following reason: ({] 1, as owner of the property or my employees with wages as their sole compensation, will do the work and the structure is not intended or offered for sale (Sec. 7044, Business and Professions Code: The Contractor's License Law does not apply to an owner of property who builds or improves thereon, and who does such work himself or through his own employees, provided that such improvements are not intended or offered for sale. If, however, the building or improvement is sold within one year of completion, the owner-builder will have the burden of proving that he did not build or improve for the purpose of sale). 0 1, as owner of the property, am exclusively contracting with licensed contractors to construct the project (Sec. 7044, Business and Professions Code: The Contractor's License Law does not apply to an owner of property who builds or improves thereon, and contracts for such projects with contractor(s) licensed pursuant to the Contractor's License Law). 0 I am exempt under Section _______ Business and Professions Code for this reason: 1. I personally plan to provide the major labor and materials for construction of the proposed property improvement. Q YES O NO 2. I (have/ have not) signed an application for a building permit for the proposed work. 3. I have contracted with the following person (firm) to provide the proposed construction (include name address/ phone/ contractors' license number): 4. I plan to provide portions of the work, but I have hired the following person to coordinate, supervise and provide the major work (include name/ address/ phone/ contractors' license number): 5. I will provide some of the work, but I have contracted (hired) the following persons to provide the work indicated (include name/ address/ phone/ type of work): OWNER SIGNATURE: ~ □AGENT DATE: f/Z1jzo2Z, CONSTRUCTION LENDING AGENCY, IF ANY: I hereby affirm that there is a construction lending agency for the performance of the work this permit is issued (Sec. 3097 (i) Civil Code). Lender's Name: ____________________ _ Lender's Address: ____________________ _ ONLY COMPLETE THE FOLLOWING SECTION FOR NON-RESIDENTIAL BUILDING PERMITS ONLY: Is the applicant or future building occupant required to submit a business plan, acutely hazardous materials registration form or risk management and prevention program under Sections 25505, 25533 or 25534 of the Presley-Tanner Hazardous Substance Account Act? I No Is the applicant or future building occupant required to obtain a permit from the air pollution control district or air quality management district? No Is the facility to be constructed within 1,000 feet of the outer boundary of a school site? No IF ANY OF THE ANSWERS ARE YES, A FINAL CERTIFICATE OF OCCUPANCY MAY NOT BE ISSUED UNLESS THE APPLICANT HAS MET OR IS MEETING THE REQUIREMENTS OF THE OFFICE OF EMERGENCY SERVICES AND THE AIR POLLUTION CONTROL DISTRICT. APPLICANT CERTIFICATION: I certify that I have read the application and state that the above information is correct and that the information on the plans is accurate. I agree to comply with all City ordinances and State laws relating to building construction. I hereby authorize representative of the City of Carlsbad to enter upon the above mentioned property for inspection purposes. I ALSO AGREE TO SAVE, INDEMNIFY AND KEEP HARMLESS THE OTY OF CARLSBAD AGAINST AU LIABILITIES, JUDGMENTS, COSTS ANO EXPENSES WHICH MAY IN ANY WAY ACCRUE AGAINST SAID CITY IN CONSEQUENCE OF THE GRANTING OF THIS PERMIT.OSHA: An OSHA permit is required for excavations over 5'0' deep and demolition or construction of structures over 3 stories in height. EXPIRATION: Every permit issued by the Building Official under the provisions of this Code shall expire by limitation and become null and void if the building or work authorized by such permit is not commenced within 360 days from the date of such permit or if the building or work authorized by such permit is suspended or abandoned at any time after the work is commenced for a period of 180 days (AB 2913). ,1 .. / _d _# APPLICANTSIGNATURE: ~~ DATE: ,1/~S?1Z.:,zz_ 1635 Faraday Ave Carlsbad, CA 92008 8-1 Ph: 760-602-2719 Fax: 760-602-8558 Page 2 of 2 Email: BLiilding@carlsbadca.gov Rev. 03/20 (cityof Carlsbad OWNER-BUILDER ACKNOWLEDGEMENT FORM B-61 Development Services Building Division 1635 Faraday Avenue 442-339-2719 www.carlsbadca.gov OWNER-BUILDER ACKNOWLEDGMENT FORM Pursuant to State of California Health and Safety Code Section 19825-19829 To: Property Owner An application for construction permit(s) has been submitted in your name listing you as the owner-builder of the property located at: site Address 2275 Nob Hill Drive, Carlsbad, CA 92008 The City of Carlsbad ("City") is providing you with this Owner-Builder Acknowledgment and Verification form to inform you of the responsibilities and the possible risks associated with typical construction activities issued in your name as the Owner-Builder. The City will not issue a construction permit until you have read and initialed your understanding of each provision in the Property Owner Acknowledgment section below and sign the form. An agent of the owner cannot execute this notice unless you, the property owner, complete the Owner's Authorized Agent form and it is accepted by the City of Carlsbad. INSTRUCTIONS: Please read and initial each statement below to acknowledge your understanding and verification of this information by signature at the bottom of the form. These are very important construction related acknowledgment s designed to inform the property owner of his/her obligations related to the requested permit activities. I. ~ I understand a frequent practice of unlicensed contractors is to have the property owner obtain an "Owner- Builder" building permit that erroneously implies that the property owner is providing his or her own labor and material personally. I, as an Owner-Builder, may be held liable and subject to serious financial risk for any injuries sustained by an unlicensed contractor and his or her employees while working on my property. My homeowner's insurance may not provide coverage for those injuries. I am willfully acting as an Owner-Builder and am aware of the limits of my insurance coverage for injuries to workers on my property. II. ~I understand building permits are not required to be signed by property owners unless they are responsible for the construction and are not hiring a licensed contract or to assume this responsibility. 111. ~I understand as an "Owner-Builder" I am the responsible party of record on the permit. I understand that I may protect myself from potential financial risk by hiring a licensed contractor and having the permit filed in his or her name instead of my own. IV. lMA.,_1 understand contractors are required by law to be licensed and bonded in Ca lifornia and to list their license numbers on permits and contracts. V. ~ I understand if I employ or otherwise engage any persons, other than California licensed contractors, and the total value of my construction is at least five hundred dollars ($500), including labor and materials, I may be considered an "employer" under state and federal law. 1 REV. 08/20 Owner-Builder Acknowledgement Continued VI. ~I understand if I am considered an "employer" under state and federal law, I must regist er with the st ate and federal government, withhold payroll taxes, provide workers' compensation disability insurance, and contribute to unemployment compensation for each "employee." I also understand my failure to abide by these laws may subject me to serious financial risk. VII. ~I understand under California Contractors' State License Law, an Owner-Builder who builds single-family residential structures cannot legally build them with the intent to offer them for sale, unless all work is performed by licensed subcontractors and the number of structures does not exceed four within any calendar year, or all of the work is performed under contract with a licensed general building contractor. VIII. t>'W'--I understand as an Owner-Builder if I sell the property for which this permit is issued, I may be held liable for any financial or personal injuries sustained by any subsequent owner(s) which result from any latent construction defects in the workmanship or materials. IX. ~ I understand I may obtain more information regarding my obligations as an "employer" from the Internal Revenue Se rvice, the United States Small Business Administration, the California Department of Benefit Payments, and the California Division of Industrial Accidents. I also understand I may contact the California Contractors' State License Board (CSLB) at 1-800-321-CSLB (2752) or www.cslb.ca.gov for more information about licensed contractors. X. ~ I am aware of and consent t o an Owner-Builder building permit applied for in my name, and understand that I am the party legally and financially responsible for proposed construction activity at the following address: 2275 Nob Hill Drive, Carlsbad, CA 92008 XI. fll!M... I agree that, as the party legally and financially responsible for this proposed construction activity, I will abide by all applicable laws and requirements that govern Owner-Builders as well as employers. XII. ~I agree to notify the issuer of this form immediately of any additions, deletions, or changes to any of the information I have provided on this form. Licensed contractors are regulated by laws designed to protect the public. If you contract with someone who does not have a license, the Contractor's State License Board may be unable to assist you with any financial loss you may sustain as a result of a complaint. Your only remedy against unlicensed Contractors may be in civil court. It is also important for you to understand that if an unlicensed Contractor or employee of that individual or firm is injured while working on your property, you may be held liable for damages. If you obtain a permit as Owner- Builder and wish to hire contractors, you will be responsible for verifying whether or not those contractors are properly licensed and the status of their workers' compensation coverage. Before a building permit can be issued, this form must be completed, signed by the property owner and returned to the City of Carlsbad Building Division. I declare under penalty af perjury that I have read and understand all af the information provided on this form and that my responses, including my authority to sign this form, is true and correct. I am aware that I have the option to consult with legal counsel prior to signing this form, and I have either (1) consulted with legal counsel prior ta signing this form or (2) have waived this right in signing this form without the advice of legal counsel. David Mueller Property Owner Name (PRINT) 2 Property Owner Signature 7/12/2022 Date REV.08/20 Building Permit Inspection History Finaled {city of Carlsbad PERMIT INSPECTION HISTORY for (CBR2022-3707) Permit Type: BLDG-Residential Application Date: 10/06/2022 Owner: CO-OWNERS DAVID AND CHRISTINE Work Class: Retaining Wall Status: Closed -Finaled MUELLER Issue Date: 06/13/2025 Subdivision: KNOB HILL Expiration Date: 12/30/2025 IVR Number: 43812 Address: 2275 NOB HILL DR CARLSBAD, CA 92008-1138 Scheduled Actual Inspection Type Inspection No. Inspection Primary Inspector Reinspection Inspection Date Start Date 07/03/2025 07/03/2025 BLDG-66 Grout Checklist Item 289542-2025 COMMENTS Status Passed Dirk de Roggenbuke BLDG-Building Deficiency No in progress inspection called BLDG-Final Inspection 289543-2025 Tuesday, September 16, 2025 Checklist Item BLDG-Building Deficiency BLDG-Structural Final COMMENTS Passed Dirk de Roggenbuke Passed Yes Passed Yes Yes Complete Complete Page 1 of 1 True North COMPLIANCE SERVICES June 4, 2025 City of Carlsbad Community Development Department -Building Division 1635 Faraday Ave. City of Carlsbad -FINAL REVIEW City Permit No: CBR2022-3707 True North No.: 22-018-327 Carlsbad, CA 92008 Plan Review: Retaining Wall Address: 2276 Nob Hill Dr Applicant Name: David Mueller Applicant Email: DmueUer@pcioc.com OCCUPANCY AND BUILDING SUMMARY: Occupancy Groups: ??? (Provide this information) Occupant Load: NIA Type of Construction: ??? (Provide this information) Sprinklers: ??? (Provide this information) Stories: NI A Area of Work (sq. ft.):??? (Provide this information) The plans have been reviewed for coordination with the permit application. Valuation: See Notes Below Scope of Work: Confirmed Floor Area: See Notes Below Notes: Valuation and total retaining wall linear feet not provided in permit application. Applicant to revise. Attn: Building & Safety Department, True North Compliance Services, Inc. has completed the final review of the following documents for the project referenced above on behalf of the City of Carlsbad: 1. Drawings: Electronic copy dated December 26, 2024, by Gabriel Nathanael. The 2022 California Building, Mechanical, Plumbing, and Electrical Codes (i.e., 2021 IBC, UMC, UPC, and 2020 NEC, as amended by the State of California), 2022 California Green Building Standards Code, 2022 California Existing Building Code, and 2022 California Energy Code, as applicable, were used as the basis of our review. Please note that our review has been completed and we have no further comments. We have enclosed the above noted documents bearing our review stamps for your use. Please call if you have any questions or ifwe can be of further assistance. Sincerely, True North Compliance Services Review By: Qamar Aloqaily -Plan Review Engineer True North Compliance Services, Inc. 8369 Vickers Street, Suite 207, San Diego, CA 92111 T / 562. 733.8030 Response to Comments 05/23/2025 from letter below of 02/12/2024 February 12, 2024 City of Carlsbad Transmittal Letter Community Development Department -Building Division 1635 Faraday Ave. Carlsbad, CA 92008 Plan Review: Residential-Retaining Walls Address: 2275 Nob Hill Dr., Carlsbad CA Applicant Name: David Mueller Applicant Email: dmueller@pcioc.com Trt1e North COMPLIANCE SERVICES SECOND REVIEW City Permit No: CBR2022-3707 True North No.: 22-018-327 True North Compliance Services, Inc. has completed the second review of the following documents for the project referenced above on behalf of the City of Carlsbad: 1. Drawings: Electronic copy dated N/ A by NI A. Attn: Permit Technician, the plans have been reviewed for coordination with the permit application. See below for additional information: Valuation: Scope of Work: Floor Area: See Notes Below Confirmed See Notes Below Notes: Provide valuation and total linear feet of the retaining walls. Our comments follow on the attached list. Please call if you have any questions or if we can be of further assistance. Sincerely, True North Compliance Services Review By: Bryan Montes -Plan Review Engineer True North Compliance Services, Inc. 3939 Atlantic Avenue Suite 224, Long Beach, CA 90807 T / 562.733.8030 Residential -Retaining walls 2275 Nob Hill Dr. February 12, 2024 City of Carlsbad-SECOND REVIEW City Permit No.: CBR2022-3707 True North No.: 22-018-327 Page2 Plan Review Comments RESUBMITIAL INSTRUCTIONS: Deliver THREE corrected sets of plans and TWO corrected calculations/reports directly to the City of Carlsbad Building Division, 1635 Faraday Ave., Carlsbad, CA 92008, (442) 339-2719. The City will route the plans to True North, Planning and Land Development Engineering Departments (if applicable) for continued review. Note: If this project requires FIRE PREVENTION review, ensure that you follow their specific instructions for resubmittal review. The City will not route plans back to Dennis Grubb & Associates for continued Fire Prevention review. GENERAL INFORMATION: A. The following comments are referred to the 2019 California Building, Mechanical, Plumbing, Electrical Codes, California Green Building Standards Code, and Energy Code (i.e., 2018 IBC, UMC, UPC, and 2017 NEC, as amended by the State of California). B. There may be other comments generated by the Building Division and/or other City departments that will also require your attention and response. This attached list of comments, then, is only a portion of the plan review. Contact the City for other items. C. Respond in writing to each comment by marking the attached comment list or creating a response letter. Indicate which details, specification. or calculation shows the required information. Your complete and clear responses will expedite the re-check. D. Please be sure to include the architect and engineer's stamp and signature on all sheets of the drawings and on the coversheets of specifications and calculations per CBPC 5536.1 and CBPC 6735. This item will be verified prior to plan approval. OCCUPANCY & BUILDING SUMMARY: Occupancy Groups: Occupant Load: Type of Construction: Sprinklers: Stories: Area of Work (sq. ft.): ??? (Provide this information) NIA ??? (Provide this information) House is Wood frame-project is 138' modular ??? (Provide this infonnation) block "Keystone" Retaining Walls NIA ??? (Provide this information) 138 Lineal Feet Retaining Walls= 138 sq. ft. ARCIIlTECTURAL COMMENTS: A2. On the cover sheet of the plans, address the following comments: f) Provide individual and total linear feet of the proposed retaining walls. 138' see sheet A-1. PC2. Comment remains. Provide the individual and total linear feet of the proposed retaining walls on the plans. PC2. Additional comments based on the resubmitted plans. Provide guardrails where the elevati011 difference between the upper walkways to grade below is 30" or more. CRC R312.l.l Per discussion & emails with plan reviewer, project is garden terrace walls with plantings (added to plans)- not a traffic way and hand rails are not required in this instance. Also, see measurements on walls Pg. A-1. Residential -Retaining walls 2275 Nob Hill Dr. February 12, 2024 City of Carlsbad-SECOND REVIEW City Permit No.: CBR2022-3707 True North No.: 22-018-327 Page3 a) Guardrail shall be at the same height as the handrail at 42" minimum at the walkway. CRC R312.1.2 b) The spacing of the openings at the guards to be such that a sphere, 4 inch in diameter shall not pass through. CRC R312.1.3. c) Provide guardrail connection detail, include connection detail for the guards capable of resisting a 200-pound load at the top. CBC 1607.9.1.1. l~ SETBACK LINE I 18'. o· 12'. o· ;,,---- ~/', / ' ~~ ?'/ /y / ,'/ ..... -:, ' E SECTIONA•A STRUCTURAL COMMENTS: '" /· • " '~ / Jw I S 1. The structural plans submitted for review are incomplete. Photos of completed work are not allowed to be approved for a proposed project. The proposed structural design, calculations, construction details, etc. for the retaining walls shall be submitted for review. Work that has been completed in the field without a permit is still considered new construction. Provide complete structural plans and calculations for this project. Additional comments may arise upon resubmittal of the required documents once a complete structural review could be performed. Please revise. PC2. Comment remains. Provide complete structural plans and design calculatio11s for the proposed retaining walls. The following note on the plans does not suffice. Complete construction information, details, etc. for the walls shall be clearly identified on the plans. Please revise. Structural plans, calculations, and details to be stamped by a Registered Professional in the State of California. Please see added Planting Plan sheet A.2 and Retaining WaU sections Detail 1. See Sheet A.2 for Planting Plan and "KEYSTONE COMPAC II Installation Guides added and followed per manufacturer specifications. Residential -Retaining walls 2275 Nob Hill Dr. City of Carlsbad-SECOND REVIEW City Permit No.: CBR2022-3707 True North No.: 22-018-327 Page -I February 12, 2024 ~ ~~.........,,.... 3) RETAINING WALLS • KEYSTONE OMPAC II INST ALLEO PER NUFACTURER'S SPECIFICATIONS • 05/23/2025 *** See Notes Below for reply to comments S2. Submit a letter from the geotechnical engineer confirming that the foundation plan, details, and specifications have been reviewed and that it has been determined that the recommendations in the geotechnical report are properly incorporated into the plans. Alternatively, the geotechnical engineer may stamp and sign the foundation plan and all sheets containing foundation details. PC2. Comment remains. Submit a Letter .from the geotechnical engineer confirming that the foundation plan, details, and specifications have been reviewed and that it has been determined that the recommendations in the geotechnical report are properly incorporated into the plans. Alternatively, the geotechnical engineer may stamp and sign the foundation plan and all sheets containingfoundation details. If you have any questions regarding the above comments, please contact Bryan Montes via email bryanm@tncservices.com or telephone (562) 733-8030. [END] * * * Refer to Geo technical Engineer's 4 page letter of 01/23/2024 located across the top of sheet A-3. Please note: The entfre purpose of Geotechnical Engineer's Report, letter, plans,soils tests, and large amount of fees paid by homeowner was to verify the previously (w/o Permit by error) installed KEYSTONE COMPAC II WALLS on the property. To confirm by field testing and examination of the proper installation of the walls, for this Site and per the Manufacturer's Engineered Installation Specifications. See new added Sheet A.5 for manufacturer's installation instructions and specifications that were followed, as per Engineer's Inspection and calculations. Note: City of Carlsbad has approved zoning and have offered to directly review these plans if True North does not approve plans as updated and as per casual review with TN plan reviewer Bryan Montes all requirements have been clarified and True North is prepared to now approve these plans. Submitted by Hand Delivery to City of Carlsbad, attention Angie Teanio and/or Andy De La Torre for forwarding to True North 05/27/2027 by Gabriel Nathanael Design Transmittal Letter October 26, 2022 City of Carlsbad Community Development Department -Building Division 1635 Faraday Ave. Carlsbad, CA 92008 Plan Review: Residential-Retaining Walls Address: 2275 Nob Hill Dr., Carlsbad CA Applicant Name: David Mueller Applicant Email: dmueller@pcioc.com True No1th COMPLIAN CE SERVICES FIRST REVIEW City Pennit No: CBR2022-3707 True North No.: 22-018-327 True North Compliance Services, Inc. has completed the first review of the following documents for the project referenced above on behalf of the City of Carlsbad: 1. Drawings: Electronic copy dated NIA by NIA. Attn: Permit Technician, the plans have been reviewed for coordination with the permit application. See below for additional information: Valuation: Scope of Work: Floor Area: See Notes Below Confirmed See Notes Below Notes: Provide valuation and total linear feet of the retaining walls. Our comments follow on the attached list. Please call ·if you have any questions or if we can be of further assistance. Sincerely, True North Compliance Services Review By: Bryan Montes -Plan Review Engineer True North Comp/lance Services, Inc. 3939 Atlantic Avenue Suite 224, Long Beach, CA 90807 T / 562. 733.8030 '\ Residential -Retaining walls 2275 Nob Hill Dr. October 26, 2022 RESUBMITTAL INSTRUCTIONS: Plan Review Comments City of Carlsbad-FIRST REVIEW City Permit No.: CBR2022-3707 True North No.: 22-018-327 Page2 Deliver THREE corrected sets of plans and TWO corrected calculations/reports directly to the City of Carlsbad Building Division, 1635 Faraday Ave., Carlsbad, CA 92008, (442) 339-2719. The City will route the plans to True North, Planning and Land Development Engineering Departments (if applicable) for continued review. Note: If this project requires FIRE PREVENTION review, ensure that you follow their specific instructions for resubmittal review. The City will not route plans back to Dennis Grubb & Associates for continued Fire Prevention review. GENERAL INFORMATION: A. The following comments are referred to the 2019 California Building, Mechanical, Plumbing, Electrical Codes, California Green Building Standards Code, and Energy Code (i.e., 2018 IBC, UMC, UPC, and 2017 NEC, as amended by the State of California). B. There may be other comments generated by the Building Division and/or other City departments that will also require your attention and response. This attached list of comments, then, is only a portion of the plan review. Contact the City for other items. C. Respond in writing to each comment by marking the attached comment list or creating a response letter. Indicate which details, specification, or calculation shows the required information. Your complete and clear responses will expedite the re-check. D. Please be sure to include the architect and engineer's stamp and signature on all sheets of the drawings and on the coversheets of specifications and calculations per CBPC 5536. l and CBPC 6735. This item will be verified prior to plan approval. OCCUPANCY & BUILDING SUMMARY: Occupancy Groups: Occupant Load: Type of Construction: Sprinklers: Stories: Area of Work (sq. ft.): ??? (Provide this information) NIA ??? (Provide this information) ??? (Provide this information) NIA ??? (Provide this information) ARCHITECTURAL COMMENTS: Al. The plans are not signed. Per the California Business and Professions Code 5536.1, please provide a signature on every sheet of the plans of the person responsible for their preparation. Please revise. A2. On the cover sheet of the plans, address the following comments: a) Provide a scope of work statement clearly stating all proposed work under this permit application. b) List the occupancy group. c) Specify the construction type. • Residential -Retaining walls 2275 Nob Hill Dr. City of Carlsbad-FffiST REVIEW City Permit No.: CBR2022-3707 True North No.: 22-018-327 Page3 October 26, 2022 d) Provide notes indicating compliance with all the applicable California Building Codes and Standards for this project (i.e.2019 CBC, 2019 CRC, City of Carlsbad Municipal Code, etc.) Please revise. e) Provide a sheet index listing all sheets within the plan set. f) Provide individual and total linear feet of the proposed retaining walls. STRUCTURAL COMMENTS: Sl. S2. S3. S4. ss. The structural plans submitted for review are incomplete. Photos of completed work are not allowed to be approved for a proposed project. The proposed structural design, calculations, construction details, etc. for the retaining walls shall be submitted for review. Work that has been completed in the field without a permit is still considered new construction. Provide complete structural plans and calculations for this project. Additional comments may arise upon resubmittal of the required documents once a complete structural review could be performed. Please revise. A soils report is required for the construction of the proposed retaining walls. See link below for additional information. Provide a copy of the requires soils report for review. https://www.carlsbadca.gov/home/showpublisheddocument/6835/637842553336870000 Submit a letter from the geotechnical engineer confirming that the foundation plan, details, and specifications have been reviewed and that it has been determined that the recommendations in the geotechnical report are properly incorporated into the plans. Alternatively, the geotechnical engineer may stamp and sign the foundation plan and all sheets containing foundation details. Structural observation per Section 1704 is required for this project. The engineer of record shall prepare an inspection program, including the name(s) of the individuals or firms who will perform the work. The inspection program shall be shown on the first sheet of the structural drawings. CBC 1704.6.2 Provide a "Statement of Special Inspections" per CBC 1704.2.3 and as defined in CBC 1704.3. Not only should this list all special inspection and structural testing items that are required by the CBC, but also detail the extent and frequency of the inspections/tests. If you have any questions regarding the above comments, please contact Bryan Montes via email bryanrn@tncservices.com or telephone (562) 733-8030. [END] Geotechnical Exploration, Inc. SOIL AND FOUNDATION ENGINEERING • GROUNDWATER • ENGINEERING GEOLOGY 23 January 2024 David and Christine Mueller 2275 Nob Hill Drive Carlsbad, CA 92008 Job No. 23-14478 Subject: Geotechnical Observations and Retaining Wall Evaluation Mueller Property Reta ining Walls 2275 Nob Hill Drive Carlsbad, Ca lifornia Dear Mr. and Mrs. Mueller: In accordance with your request, a representative of Geotechnica/ Exploration, Inc. visited the subject site and performed an evaluation of the soil conditions in the area of the existing retaining walls in the rear yard on the east side of the existing residence (see Figure No. I, Vicinity Map, for site location). The existing keystone retaining walls range from 3 to 6 feet high and total approximately 150 f eet in length utilizing a gravel leveling pad founded on compacted fill soil. As part of our evaluation, we observed and evaluated the surficial soil cond itions on the descending slope in the southeast corner of the lot where the keystone retaining walls were built. It is our understanding that the existing keystone retaining walls were built without a permit and the City of Carlsbad is requiring an evaluation of the wall construction and soil conditions prior to inspection and finalizing the permit. See Figure No. II, Plot Plan, for location of walls, exploratory excavations, and other information. The field work, conducted on October 13, 2023, consist ed of excavating four exploratory test pit s/hand auger borings adjacent to the existing retaining walls (see Figure Nos. IIIa-d for excavation logs and Figure No. IV for soil information). Our observations revealed that the keystone retaining walls are underlain by CTY JC 7420 TRADE STREET• SAN DIEGO, CA 92121 • (858) 549-7222 • FAX: (858) 549-1604 • EMAIL: geotech@gei-sd.com Mueller Property Retaining Walls Carlsbad, California Job No. 23-14478 Page 2 approximately 1.5 to 8 feet of medium dense, silty sand fill soil over dense formation. The retaining walls were built on an approximately 14-foot-h igh fill slope and has a gradient of approximately 2.0:1.0 (horizontal to vertical). Our site observations after wall construction revealed that the existing retaining walls are underlain by good-bearing compacted fill or dense formational soil and a 10-inch- thick, crushed rock gravel leveling pad. Based on photographs provided by the contractor, a perforated subdrain pipe wrapped in filter fabric was placed behind the base of the walls and outlets at the bottom of the slope at the east property boundary. In addition, photographs show the 6-foot-high wall is backfilled with on-site silty sand and t hree layers of 4-foot-wide geogrid. The 5-foot-high wall has t wo layers of geogrid and the 3-foot-high wall has one layer of geogrid. According to the contractor that built the retaining walls, the geogrid layers consisted of Miragrid 2XT that were placed every 2 feet. In our opinion, the existing keystone walls and silty sand backfill material appear stable. Based on soil probing of the footing excavation and probing of the surf ace soil behind the wall, the backfill appears to be properly compa cted. The keystone wall provides positive drainage and protection from su rface erosion. CONCLUSIONS AND RECOMMENDATIONS The following conclusions and recommendations are based on field observations conducted by our firm in conjunction with our knowledge and experience with t he soils in this area of the City of Carlsbad. Bl Mueller Property Retaining Walls Carlsbad, California Job No. 23 -14478 Page 3 1. It is our opinion that the keystone walls were placed on a gravel layer and founded on firm compacted fill or dense formational soil with adequate bearing capacity. The walls should remain stable as long as proper surface and subsurface drainage is provided. 2. Based on the observed depth of the foundation for the keystone walls, it is our opinion that a setback to the slope face of at least 5 feet has been provided. 3. The existing 3-to 6 -feet-high retaining walls, built of Compact II keystone blocks, gravel leveling pad and soil backfill, should comply with the minimum factors of safety for bearing, overturning and sl iding per the standard design plans provided by RCP. The so il bearing pressure produced by the keystone r etaining wall foundation is less than 1,000 pounds per square foot (psf). The factor of safety against soil bearing failure, safety against sliding and overturning should be 1.5. The maximum exposed height of keystone wall is 6 feet. For review purposes, we considered the wall embedment as 1 foot and the maximum exposed height as 6 feet, and, as such, the existing wall is considered acceptable. We did a si milar review for the 5-foot-high and 3-foot- high walls and found both to be acceptable as well. Refer to Appendix A, Slope Stability Calcu lations, for more information. 4. It is our opinion t he existing wall may be left as is. Proper drainage should be provided at the top of the walls at all times to drain water runoff away from the walls. D Mueller Property Retaining Walls Carlsbad, California LIMITATIONS Job No. 23-14478 Page 4 Our conclusions and recommendations have been based on all available data obtained from our field observations and wall evaluation, as well as our experience with the soil s and formation materials located in the City of Carlsbad. The work performed and recommendations presented herein are the result of an investigation and analysis that meet the contemporary standard of care in our profession within the San Diego County area. The firm of Geotechnical Exploration, Inc. shall not be held responsible for changes to the physical condition of the property, such as addition of fill soils or changing drainage patterns, which occur subsequent to issuance of this report. Once again, should any questions arise concerning this report, please feel free to contact the project coordinator. Reference to our Job No. 23-14478 will help expedite a reply to your inquiries. Respectfully submitted, IL Jay . Heiser Senior Project Geologist R.C.E. 34422/G.E. 2007 Senior Geotechnical Engineer 111 \ rloliday\ \Park I VICINITY MAP , - ----;::=~::i=;--;:==-- MARRON 00 DA / \: . -%, :z. ~ vJ; Go ~~ ~ ~~ I i w WY ~ CARLSBAD 1 CULTURAL i ARTSCEN7E • Carlsbad Hs Thomas Bros. Guide San Diego County, pg 1106-G4 Mueller Retaining Wall s 2275 Nob Hill Drive Carl sbad, CA. Figure No. I Job No. 23-14478 ~e l;i Geotechnical ~,..-, Exploration, Inc ~ NOB HILL DRIVE J; \ I \ \ \ I .... / , \ ' / I I J , I I I I I A :a.T' r- I 20 0 10 20 30 r I i I I l GRAPHIC SCALE ( 1" = 20') Approximate Location of Exploratory Handpit \ Existing Structure (NOT A PART) 23-14478-P.a, \ \ ' \ ' \ I \ I \ I \ REFERENCE: This Plot Plan was prepared from a SITE PLAN provided by the client dated 1 /26/24 and from on-site field reconnaissance performed by GEi. letaining Wall Location PLOT PLAN Mueller Retaining Walls 2275 Nob Hill Drive Carlsbad, CA. Figure No. II Job No. 23-14478 4';-4~ Geotechnical I' liirl Exploration, Inc. ~ January 2024 M I::! $ >-0 <!) _, 0.. X w I 0 w <!) ~ 0.. <!) er w _, _, w :::, ~ a, ~ <!) 0 _, z 0 ~ er 0 _, 0.. 1;5 / EQUIPMENT DIMENSION & TYPE OF EXCAVATION DATE LOGGED \. Hand Tools 3' X 3' X 5' Handpit SURFACE ELEVATION GROUNDWATER/ SEEPAGE DEPTH ± 275' Mean Sea Level Not Encountered ~ ~ :i:: I-Q. w 0 2 - - - --3 ----- - --4 --- - ---- 5 -- -- ---6 --- - - FIELD DESCRIPTION AND CLASSIFICATION ~ wf----------------------,-----, g ~ DESCRIPTION AND REMARKS c,j ~ ~ (Grain size, Density, Moisture, Color) en en ~ SIL TY SAND , fine-to medium-grained, with some roots and rock fragments. Medium dense. Damp. Red-brown. FILL (Qaf) SIL TY SAND , fine-to medium-grained; moderately cemented. Dense. Damp. Red-brown. VERY OLD PARALIC DEPOSITS (Qvop 12) --22% passing #200 sieve. Bottom @5' JOB NAME (.) c,j :::i SM SM 10-13-23 LOGGED BY JKH ~ >-= >-C a:::= w ~ 8. w 0 8. w Q'. jf ::;; Q'. ::;;- =>~ u~ => => :5w ::;; I-::;;-:5 en ~5 -en a. -a.z ><z ,o 'w ~~ :?; ::;; :?;o 0::;; 9.8 127.6 4.6 114.4 y_ PERCHED WATER TABLE Mueller Retaining Walls [Z] BULK BAG SAMPLE SITE LOCATION [TI IN-PLACE SAMPLE 2275 Nob Hill Drive, Carlsbad, CA ■ MODIFIED CALIFORNIA SAMPLE JOB NUMBER REVIEWED BY LDR/JAC 0 23-14478 4~.:;t ..... , •• ,, .. NUCLEAR FIELD DENSITY TEST FIGURE NUMBER Exploratlon, Inc. ~ STANDARD PENETRATION TEST Illa ~ "' l ci ci .....: d ~q + _; "'= en wen :z 0 I-~w -::;; en_ c,: en 3::z a. :i:: zo a. z o=> ::;;u ~~ >< 0 ~o <t:Z w u <DU en= 90 LOG No. HP-1 , "' ~ $ I-0 (!) _j a. X w I 0 w (!) ~ a. (!) a: w ...J ...J w ::::, ::. (0 ,-.. ... ;": (!) 0 ...J z 0 ~ 0 ...J a. X w r EQUIPMENT DIMENSION & TYPE OF EXCAVATION DATE LOGGED '- Hand Tools 3' X 3' X 6' Handpit 10-13-23 SURFACE ELEVATION GROUNDWATER/ SEEPAGE DEPTH LOGGED BY :r: I-Q. w 0 2 3 4 5 6 7 ± 272' Mean Sea Level Not Encountered JKH y_ [gJ [I] ■ 0 [?iJ FIELD DESCRIPTION AND CLASSIFICATION DESCRIPTION AND REMARKS (Grain size, Density, Moisture, Color) SIL TY SAND , fine-to medium-grained, with some roots and rock fragments. Medium dense. Damp. Red-brown. FILL (Qaf) --geogrid layer. Hand auger from 3'-6'. No geogri d layers encountered in 4-inch diameter auger hole. Bottom @6' JOB NAME Cl) (.) Cl) ::::i SM >-~ >-c ~ 0C C w ~ 8. :::d~ 0 8. w oc ~f ::;;- ::J ~ U::J ::J ::J :'.'S~ :'.'S u'i ::;; I-::;;- -(J) -(J) Q. -Q.Z I--xz ,o 'w Q. 0 ~~ ~::;; ~o o::e 5.5 107.5 PERCHED WATER TABLE Mueller Retaining Walls BULK BAG SAMPLE SITE LOCATION IN-PLACE SAMPLE 2275 Nob Hill Drive, Carlsbad, CA JOB NUMBER REVIEWED BY LDR/JAC MODIFIED CALI FORNIA SAMPLE 23-14478 ◄~.~ G•o<tthnl<al NUCLEAR FIELD DENSITY TEST FIGURE NUMBER Exploratlon, Inc. STANDARD PENETRATION TEST lllb ~ 'I ~ 0 ci ci i--: c:i ~cj + _j l!,: (J) wen :z 0 I--'W -::e (J) 3: z Q. :r: en_ <( zo Q. z 0 ::J ::eu ~c X 0 _,o <CZ w u rou <n= 84 LOG No. HP-2 <') (:! $ I-0 (!) _, Q. /j 0 w (!) --, Q. (!) a: w :::l w ::, ::; co ~ (!) 0 _, z 0 ~ a: 0 _, Q. /j / EQUIPMENT DIMENSION & TYPE OF EXCAVATION DATE LOGGED \. Hand Tools 3' X 3' X 4' Hand pit SURFACE ELEVATION GROUNDWATER/ SEEPAGE DEPTH ± 267' Mean Sea Level Not Encountered 'a;' ~ -' :c 0 f-(D a. :::. w >-0 en ~ -,~-. .. ~ ~ 1 -,·.:: -. . • -. . . ~-~:-~ -~~ w -' a. :::. <C en FIELD DESCRIPTION AND CLASSIFICATION DESCRIPTION AND REMARKS (Grain size, Density, Moisture, Color) SIL TY SAND , fine-to medium-grained, with some roots and rock fragments. Medium dense . Damp. Red-brown. FILL (Qaf) c/2 c_j c/2 :::i SM 2 _1 1·· --~- -•. • • ,---:,-=-:--:=-:--=-:,-:-;-:=---=----:----,,------,---,,---:-:--:--:----+-=--:--c--i SIL TY SAND , fine-to medium-grained. Medium SM I, -1, dense to dense. Damp. Red-brown. - 3 -VERY OLD PARALIC DEPOSITS (Qvop 12) - - - - 4 - -Bottom @4' - 5 - - - - JOB NAME 10-13-23 LOGGED BY JKH >-~ >-c ~ c::c w ~ 8. :::. ~ 0 8. w 0:: ~~ :::.- (.) :::, :::, :::, :::, i": :::s~ ::5 u5 :::. f-:::.--en -en q.-a.z f--xz ~~ 'w a. 0 ~~ ~o o:::. 10.5 113.9 y PERCHED WATER TABLE Mueller Retaining Walls ~ BULK BAG SAMPLE SITE LOCATION [TI IN-PLACE SAMPLE 2275 Nob Hill Drive, Carlsbad, CA ■ MODIFIED CALIFORN IA SAMPLE JOB NUMBER REVIEWED BY LDR/JAC 0 23-14478 4r,i-4:t Goo<e<hnO<al NUCLEAR FIELD DENSITY TEST FIGURE NUMBER Exploration, Inc. ~ STANDARD PENETRATION TEST Ille ~ ...... ~ 0 ci ci ' ~ 0 i":c::j + ..J en win z 0 f--'W -:::. en 3:z en_ <C a. :c zo a. z 0::::, :::.u ~c X 0 _,o <CZ w (.) (D (.) en= 89 LOG No. HP-3 ~ 5 (!) _j 0.. ~ 0 w ~ EQUIPMENT DIMENSION & TYPE OF EXCAVATION Hand Auger 4-inch diameter Auger Hole SURFACE ELEVATION GROUNDWATER/ SEEPAGE DEPTH 9 ± 281' Mean Sea Level Not Encountered _, w 0 _, CD a.. ::E ::E >-<( en en FIELD DESCRIPTION AND CLASSIFICATION DESCRIPTION AND REMARKS (Grain size, Density, Moisture, Color) SIL TY SAND , fine-to medium-grained. Medium dense. Damp. Red-brown. FILL (Qaf) --4' geogrid layer@ 1.4'. --4' geogrid layer@ 2.6'. Bottom @8' c,j (..) c,j :::i SM ~ w WO:: (.)::, :'.5 ti; a..-,o ~::E DATE LOGGED 'I 10-13-23 LOGGED BY JKH ~ >-= ~= ~ ~ ci ~ 8. w 0 8. ci .-: ci ~~ ::E 0:: ::E~ l'.:C! + _j ~ ::, ::, ::, /'.: en wen :'.5 ci5 ::E I-::E--::E z 0 I--'W -en -en en_ <( en 3::z a.. :r: a..z I--xz zo a.. z 0::, ::Eu 'w a.. 0 ~~ ~~ X 0 _, 0 <CZ ~o 0 ::E w (.) CD U en= (!)...._ _ ___.__....._....,_ ____________________ __.__ ........ _ __.. __ __...._ _ ___. __ __.__ ........ __ ....,_ _ __...._ _ _. -, 0.. (!) a: w ...J ...J w :::, :::. a, ,._ ~ (!) 0 ...J z 0 ~ g 0.. ~ '- y ~ OJ ■ @] ~ PERCHED WATER TABLE BULK BAG SAMPLE IN-PLACE SAMPLE MODIFIED CALIFORN IA SAMPLE NUCLEAR FIELD DENSITY TEST STANDARD PENETRATION TEST JOB NAME Mueller Retaining Walls SITE LOCATION 2275 Nob Hill Drive, Carlsbad, CA JOB NUMBER REVIEWED BY LDR/JAC LOG No. 23-14478 4~.:;:t G,o.,,hnl~I HA-1 FIGURE NUMBER Exploration, Inc. llld ~ ~ >-0 (!) :s "' w u. w (!) ~ Q. <!! a:: w ...J ...J w ::::, ::; <X) ,-.. ~ 0 13 5 13 0 12 5 120 115 110 'ti 0. ~ u5 as 105 0 >-er 0 100 95 90 85 80 75 0 / ~ ' f7 5 \ \ ' ' \ \ ' \ ' ' \ \ \ 1 .... ~ \ \ ., \ \ 1 \ L\ 1 \ ' 10 \ Source of Material HP-1 @ 1.8' \ I\ ' Description of Material SIL TY SAND {SM}1 Red-brown ' I\ \ \ \ Test Method ' \ \ 1 \ \ I\ \ 1 \ \ TEST RES UL TS \ ' \ \ Maximum Dry Density 127.6 PCF \ ' \ \ Optimum Water Content 9.8 % ~ \ \ I\ Expansion Index (El) \ \ !\ \ I\ ' ' I\ ' \ ' '\. I'\ I\ ' \ I\ I\. I\ \ 1' Curves of 100% Saturation I\ ' for Specific Gravity Equal to: \. I\ I\. \. \ 2.80 ' I\ \ \ I\ I\. 2.70 \ \ 'I. I\ I\.. '\ 2.60 \ ' '\. I'\ I\ \. ' '\ I\. I\. \. ' ' [\. I'\ '\ r--. f\. I'\ ,,,. r'\. I'\. ' ~ f'-.. '\ '" f'-.. '\ ' .... '\. '\ "r.. ~ I', "r.. I'. " ' ~ ' ' ~ ' " '- " 15 20 25 30 35 40 45 ~t-__________________ W_A_T_E_R-r-C_O_N __ T.=.EN_T_:_,_%:...._ _______________ ___J !. -~~.► Geotechnical MOISTURE-DENSITY RELATIONSHIP 2 I ~liirl Exploration, Inc. Figure Number: IV ~ Job Name: Mueller Retaining Walls ~ Site Location: 2275 Nob Hill Drive, Carlsbad, CA ~ Job Number: 23-14478 u ____________________ ...i.,..,;,;,.;,.;.;;.,,......,.,.;,..,,;;.;..,_,;,.,;,,,;,.,;; ___________ __,,1 APPENDIX A Slope Stability Calculations 11& 0 Safety Factor 0 .250 0 .500 0 .750 1 .000 1. 250 1 .500 1 .750 2 .000 2 .250 2 .500 2 .750 3 .000 3 .250 3 .500 3 .750 4 .000 4 .250 4 .500 4.750 5 .000 5.250 5 .500 5 .750 6 .000+ PATIO 0 Geotechnical Exploration, Inc. 10 20 Project lys/s Desaiplion DriJwn By R.A.C. Date 1/18/2024, 1:54:49 PM ,0 30 40 MUELLER RESIDENCE RETAINING WALLS GLOBAL STABILITY Seale 1:85 Ccmpimy LlrtHr '•r•llotl and Both Ends 100 1010 14 Mohr.COUiomb 150 38 None O 120 Mohr-COUiomb O 30 None O 120 Mohr•Coulomb 150 30 None O 120 Mohr-COUiomb 200 32 None O 140 Mohr-Coulomb O 38 None O Static circular analysi of the existing M. retaining walls, using Tencate Miragrids. tensile strength of the was based manufacturer's and conservati assuming the grid stren at 5% strain. construction details w based on the provi information from contractor. Temporary details were assumed. 50 SECTION A-A' G.E.I. 60 File Name JOB NO. 23-14478_S(A)_0l.slim Safety Factor 0 .250 0 .500 0 .750 1 .000 1 .250 1. 500 1 .750 2 .000 2 .250 2 .500 2 .750 3 .000 3 .250 3 .500 3 .750 4 .000 4 .250 4 .500 4 .750 5 .000 5 .250 5 .500 5 .750 6.000+ 0 10 Project l~~~~~~~~~I~ Geotechnical Exploration, Inc. /ysisDescriplion Orawn By Date 20 R.A.C. 1/18/2024, 1:54:49 PM Ill □ • • • 30 40 ,.: D 15 1010 .. Molw-Coulomb 150 ll None 0 120 Motv-Coulomb 0 "' None 0 120 Molv-Coulomb ,so "' None 0 120 Molv-Coulomb 200 l2 None 0 140 Molv-Coulomb 0 ll Non, 0 Seismic circular a alysis of the existing M .S. E. re taining walls, using 2XT Tencate Miragrids. The tensil strength of the grid was bas d on the manufacturer's catal gue and conservatively assu ing the grid strength at 5 1/o strain. Wall construction de ails were based on the provided information fro the contractor. Tempo ary cut details were assume . 50 60 MUELLER RESIDENCE RETAINING WALLS SECTION A-A' GLOBAL STABILITY Scale 1:90 Company G.E.I. File Name JOB NO. 23-14478_S(A)_0lw_0.1SgSHAKE.slim TECHNICAL DATA SHEET MIRAGRID 2XT MIRAGRID41 2XT biaxial geogrid is composed of high molecular weight, high tenacity polyester mult itilament yarns woven in tension and finished with a PVC coating. MIRAGRID 2XT geogrid is inert to biological degradation and resistant to naturally encountered chemicals, alkalis, and acids. MIRAGRID 2XT geogrid is used as soil reinf orcement in MSE structures such as segmental retaining walls, precast modular b lock walls, wire faced walls, geosynthetic wrapped faced walls and steepened slopes. MIRAGRID 2XT is also used in MSE stabilized platforms for voids bridging, embankments on soft soils, landfill veneer stability, reducing differential settlement and tor foundation seismic stability. TenCate Geosynthetics Americas (A Solmax Company) is accredited by Geosynthetic Accreditation Institute -Laboratory Accreditation Program {GAi-LAP). M IRAFI 2XT meet s Build America, Buy America Act, Pub. L. No. 117-58, div. G §§ 70901-52. MECHANICAL PROPERTIES Tensile Strength @) Ultimate Tensile Strength @) 5% strain Creep Rupture Strength1 Long Term Design Strength2 PHYSICAL PROPERTIES Roll Dimensions3 (width x length) Roll Area Estimated Roll Weight TEST METHOD ASTM D6637(Method B) ASTM D6637(Method B) ASTM D5262/D6992 1 75-year design life based on NTPEP Report REGEO-2016-01-062. UNIT lbs/ft (kN/m) lbs/ft {kN/m) This value used for our slope stability analysis lbs/ft (kN/m) lbs/ft {kN/m) UNIT ft (m) yd2 (m2) lbs (kg) 2 Value based on Long Term Design Strength for sand, silt, clay. RFc• = 1.44; RF,o = 1.05; RFo = 1.1 (Insta llation damage reduction factor for other soils available upon request) 3 Special order roll lengths ore ovailable upon request. 365 South Holland Drive Pendergrass, GA 30567 ~ efMA NTPEP Tel +l 706 693 2226 www tencat~eo us y' ~--=--_____ _ Solmax is not o design or engineering professional and hos not performed any such design services to determine if Solmox's goods comply with any project plans or specifications, or with the application or use of Solmox's goods to any particular system, project, purpose, installation, or specification. FGS000116 ETQR39 MINIMUM AVERAGE ROLL VALUE MD CD 2300 (33.6) 550 (8.0) MINIMUM ROLL VALUE MD CD 1597 (23.3) 1383 (20.2) 1597 (23.3) 1383 (20.2) ROLL SIZE 4 X 50 (1.2 X 15) 6 X 150 (1.8 X 46) 12 X 150 (3.6 X 46) 22 (18) 100 (84) 200 (167) 25 (11) 50 (23) 109 (49) ~SOLMAX ,. • • . ·.