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SCHIMNOWSKI <br />CRITERIUM" <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 />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 Ib/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 />O: 651.779.7700 / criterium-schimnowski.com <br />t «1 <br />