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PC <br /> Exhibit D <br /> ASCHIMNOWSKI <br /> CRITERIUK 41111 <br /> ENGINEERS <br /> June 9, 2022 <br /> (Revised June 16, 2022) <br /> Jared Smith <br /> Concept Landscaping <br /> PO Box 430 <br /> Mound, MN 55364 <br /> Submitted by email: JaredMound@aol.com <br /> RE: Segmental Retaining Wall Typical Sections <br /> Project Location: 1350 Rest Point Circle, Mound, Minnesota <br /> Project No. 22-6321 <br /> Dear Mr. Smith: <br /> This letter includes important details regarding the attached design typical engineered section for the <br /> segmental retaining walls at the above location. This design is based on information provided by you in <br /> during a site visit on June 2, 2022, including a description of the project and existing site survey and wall <br /> layout information. Revisions include changes to the plan view and wall cross-section designs. <br /> The attached typical section(s) should be referenced for construction details. Special note should be <br /> made of the wall embedment depth and the geosynthetic fabric(geogrid) length as measured from the <br /> front face of the wall, or of the no-fines concrete wall backfill material depths, as applicable. Where tree <br /> roots conflict with geogrid installation, geogrid lengths may be modified and cut to work around roots. No • <br /> - <br /> fines concrete or double-stacked block walls may also be used as an alternative. Refer to Anchor <br /> Retaining Wall Systems Standard Specifications for installation information and details. <br /> The design of the wall system assumes the following: <br /> • Wall location: Replacement of existing timber retaining walls (similar configuration) <br /> • Wall height(s): 4.67-ft (maximum exposed heights, not including cap units) <br /> • Minimum embedment depth =6" min., or as noted <br /> • Soil conditions: Silty/Clayey Sand, friction angle= 30.0 degrees, unit weight of 125.0 lb/ft3 <br /> • Required minimum soil bearing capacity= 1500 psf <br /> • Surcharge load at top of walls: None <br /> • 2:1 maximum slope at top and bottom of walls <br /> • Block Type: Anchor Diamond Pro <br /> • Geosynthetic Fabric Type: Mirafi 3XT <br /> • Drainage pipe: Required <br /> These walls have not been designed for ground water surcharge loads. Direct all surface and <br /> groundwater drainage away from the walls. Methods to do so include but are not limited to the following: <br /> drainage swale, site grading, retention ponds, etc. Details of water control are left to the wall contractor or <br /> the site civil engineer. Please contact Criterium-Schimnowski to provide additional site assessment <br /> services if desired. <br /> The wall design was performed using the design guidelines presented in the third edition of the"Design <br /> Manual for Segmental Retaining Walls" (DMSRW) published by NCMA in 2009. Additional information <br /> requested by Criterium-Schimnowski Engineers but not available includes: geotechnical site survey and <br /> Independently Owned and Operated • <br /> 161 Dunbar Way/Mahtomedi, MN 55115 <br /> 0: 651.779.7700/criterium-schimnowski.com 41, <br />