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Name: Corrin Wendell <br />Date: January 17, 2022 <br />Page: 3 <br /> <br />H:\LTCANADA_CI_MN\0N1123140\2_Preliminary\C_Reports\Preliminary-Final Plat Review 2\Engineering Staff Review 2.docx <br /> <br />4. The current sewer alignment/profile results in a berm that will negatively affect existing drainage <br />patterns within the wetland complex. Based on aerial photography, there appears to be a defined <br />waterway that runs west to east that the berm would block. <br />c The development team should determine the hydraulic discharge coming from the existing <br />pond so that one or a series of culverts can be introduced within the berm to allow water <br />through it. Additionally, identify the elevation of various flood events (2-,10-,50-,100- <br />year) within the floodplain complex so that its affects on the berm and sanitary sewer <br />system can be understood. If flood elevations overtop the term, a defined point, rather than <br />a broad-crested overflow, should be designed & armored to prevent long-term erosion of <br />the berm. <br />d Culvert(s) should be sized to take flow under various design events <br />e Culvert(s) should have 18” minimum separation from the sanitary sewer <br /> <br /> <br />