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� <br /> CIVIL�ESIGN <br /> PROFESSIONALS <br /> ORONO COPY <br /> Oct 18, 2013 <br /> Tim Johnson <br /> Southview Design& Construction <br /> RE: Jorgenson Residence Retaining Wall(13-692) <br /> Long Lake, Minnesota <br /> Design Assumptions: <br /> Fieldstone Boulders, 15°Wall Batter <br /> Coulomb Design <br /> Live Load: None <br /> Dead Load: None <br /> Toe Slope: None <br /> Back Slope: 25H:1V MAX <br /> Seismic: N/A <br /> Bearing Capacity: 3,000 PSF <br /> Soil Design Properties: <br /> � y c <br /> Retained Soil 30° 120 PCF 0 (Pit Run Sand) <br /> Foundation Soil 26° 120 PCF 0 (Sandy Lean C(ay) <br /> Notes: <br /> No soils information was provided for this preliminary design. The onsite material is assumed to be a sandy <br /> lean clay with an internal friction angle of 26°. Where unsuitable soils are found, a subcut may be required <br /> and structural fill shall be placed and compacted to provide an adequate bearing foundation. The design <br /> requires a pit run sand with an internal friction angle of 30° to be used in the retained zone. The above <br /> minimum soil strength parameters shall be verified prior to final design. CDP shall be contacted if the aUove <br /> soil strength parameters cannot be met and a redesign may be required. <br /> Wall layouts and elevations obtained from Southview Design Landscape Plan dated 10/11/2013. <br /> A gloUal stabiliry analysis has not been performed because of the lack of geotechnical information provided. <br /> The project geotechnical engineer shall complete a global stability analysis based on the final wall design and <br /> the actual design parameters from the onsire soils. The results of a global stability analysis may cause design to <br /> change. <br /> We appreciate the opportuniry of providing services to you. If you have any questions or comments regarding <br /> this project, please feel free to contact us. <br /> Sincerely, <br /> Civil Design Professionals <br /> Steven R. Schilling <br /> Civil Desi�n Professional� . 8609 Ly�ndale Aae.S.,Suite 200 Blooinington,MN 55420 . Ofh�e(95'_)30i-5312 . w��.�dp-��.���o� <br />