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Ms. Rachel Juba <br /> May 6, 2024 <br /> Page 2 <br /> 9. Hugo and Washington County staff have reviewed the traffic study prepared for the <br /> proposed Liberty Classical School proposed project. <br /> 10. The entire site is proposed to be mass graded for earthwork balancing and directing <br /> stormwater to the stormwater basin for irrigation purposes. The addition to the school and <br /> associated improvements will have storm sewer constructed that discharges into the <br /> stormwater basin. Areas outside of the addition will be graded, however temporary swales <br /> are proposed to ensure drainage is not blocked and is conveyed to the stormwater basin <br /> allowing it to be used for water reuse. <br /> Utility Plan <br /> 11. Existing and future phase of the school will be served by well water. The Applicant has <br /> worked with a consultant on permitting these wells through the Minnesota Department of <br /> Natural Resources. <br /> 12. Municipal sanitary sewer is located outside of Hugo's Municipal Urban Service Area and the <br /> site therefore requires an On-site Wastewater Treatment System (OSWTS). Due to the size <br /> of the ultimate system, the Minnesota Pollution Control Agency is required to permit the <br /> system. <br /> 13. The addition to the school is located where the existing septic area is located. Interim sewer <br /> facility panning will be required to be provided for review until such time the OSWTS is <br /> permitted and constructed. It is anticipated that the MPCA review, including the public <br /> comment period, could be completed by October 2024. <br /> Stormwater Management <br /> 14. The site is located in Brown's Creek Watershed District (BCWD) and a permit through BCWD <br /> will be required to be obtained prior to construction. <br /> 15. The site is proposing to meet water quality requirements through water reuse for onsite <br /> irrigation.. Additional information on the irrigation design needs to be provided to confirm the <br /> irrigation design meets requirements. <br /> 16. The site is proposing to meet rate control through the use of the onsite stormwater pond and <br /> existing ponding area. Updates are needed on the hydraulic models; however it is anticipated <br /> rate control will be able to be met with the current design. <br /> 17. Updates to the hydraulic models are needed to confirm City freeboard requirements are met <br /> onsite. <br /> Wetlands <br /> 18. The project boundary straddles both the City of Hugo and May Township. Due to this, WCA <br /> was waived by May Township to the City of Hugo for the Wetland Boundary and Type <br /> application. One (1)wetland was approved (notice sent in January 2024). This wetland falls <br /> in the May Township section of the project while there were no wetlands identified in the City <br /> of Hugo Section. Due to this, May Township will handle any wetland applications submitted <br /> for the Liberty Classical Academy. There is currently a WCA application submitted to May <br /> Township (Jay Riggs—Washington Conservation District)which is under review. <br /> Thank you for the opportunity to provide comments on this project. If you have any questions, <br /> please do not hesitate to contact me at 612-360-1278. <br /> S:\Users\R_Juba\DEVELOPMENT PROJECTS\Liberty Classical Academy\Site Plan—CUP <br /> 2023\Engineers Memo and Comments\Engineers Memo Liberty 050624.docx <br />