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<br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />June 17, 2024 Project VEC 24-055 <br /> <br /> <br />Mr. Matt Jasper <br />4745 North Shore Drive <br />Orono, MN 55364 <br /> <br />Dear Mr. Jasper: <br /> <br />Re: Global Stability Analysis, 4745 North Shore Drive, Orono, MN (Revision 3 Letter) <br /> <br />As you requested, Vickery Engineering & Consulting, LLC (VEC) has prepared the Boulder Retaining <br />Wall Plans for the referenced project. The Boulder Wall Plans and Boulder Wall Calculations were <br />submitted under separate cover. As part of the design process, a global stability analysis of the proposed <br />slope was performed. <br /> <br />Attached to this letter is the results of the global stability analysis. The analysis was performed using <br />GSlope global stability software. The soil properties for the global stability analysis were assumed, based <br />on information provided by you. As you can see from the attached global stability analysis, the results of <br />the analysis indicate an overall global stability factor of safety of 1.378, which is in excess of the industry <br />standard factor of safety of 1.3. Please note, without the retaining walls, this factor of safety would be <br />less than 1.3. Therefore, the retaining walls and the stair system are required to stabilize the slope. <br /> <br />Engineering services provided by VEC engineers for this project have been conducted with that level of <br />care and skill ordinarily exercised by members of profession currently practicing in Minnesota under <br />similar time restraints and conditions. No warranty, expressed or implied, is made. Thank you for using <br />the services provided by VEC. If you have any questions regarding this letter, please call Ron Vickery at <br />952-465-8272. <br /> <br />I hereby certify that this plan, specification, or <br />report was prepared under my direct supervision <br />and that I am a duly Licensed Professional Engineer <br />under the laws of the State of Minnesota. <br /> <br /> <br /> <br /> <br />Ronald W. Vickery, PE <br />President/Principal Engineer <br />Registration Number: 24065 <br />June 17, 2024 <br /> <br />Attachments: Global Stability Analysis <br />49