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Item 3.1 Mississippi Landing Review No. 2 ENGINEERING REVIEW Commercial/Residential Subdivision Site Plan for the City of Otsego by Hakanson Anderson Submitted to: Honorable Mayor and City Council cc: Adam Flaherty, City Administrator/Finance Director Audra Etzel, City Clerk Dan Licht, City Planner Dave Kendall, City Attorney Jesse Hartung, Modern Construction of MN Jeffery Prasch, Demarc Land Surveying & Engineers Reviewed by: Ronald J. Wagner, P.E. Matthew Kind, P.E. Date: February 2, 2023 Proposed Development: Mississippi Landings Development Location: A portions of the NE ¼ of the NW ½ of Section 236, T121, R23. East of Quantrelle Avenue and South of 90th Street Applicant: Jesse Hartung Developer: Modern Construction of MN 18837 Ogden Street Elk River, MN 55330 Owners of Record: Ken Nathe, 101 Market Purpose: This is a proposed mixed use PUD development including residential and commercial space on approximately 13.8+ acres in the City of Otsego, Wright County, Minnesota. The proposed development will be served with municipal water, sanitary sewer, storm sewer, and public streets typical of an urban setting. Jurisdictional Agencies: City of Otsego, Wright County, Minnesota Department of (but not limited to) Health, Minnesota Department of Natural Resources, Minnesota Pollution Control Agency, Wright Soil and Water Conservation District. Permits Required: NPDES, Minnesota Department of Health (water), (but not limited to) Minnesota Pollution Control Agency (sanitary sewer), and Wright County PAGE 2 C:\Users\bethany.OTSEGO\Desktop\Mississippi Landing RVW2 Preliminary Plat.docx TABLE OF CONTENTS INFORMATION AVAILABLE PRELIMINARY PLAT FINAL PLAT SITE DEVELOPMENT PLANS (PRELIMINARY) TITLE SHEET DETAILS EXISTING CONDITIONS & REMOVALS SITE PLAN GRADING AND DRAINAGE PLAN UTILITY PLAN SWPPP STORM WATER MANAGEMENT WETLAND/ENVIRONMENTAL OTHER CONSIDERATIONS SUMMARY AND/OR RECOMMENDATIONS PAGE 3 C:\Users\bethany.OTSEGO\Desktop\Mississippi Landing RVW2 Preliminary Plat.docx INFORMATION AVAILABLE Preliminary Plat for Mississippi Landings, updated 12/16/22, by Demarc Land Surveying and Engineering Preliminary Site Development Plans for Mississippi Landings, revised 1/17/23, by Demarc Land Surveying and Engineering Flood Analysis (No Storage Bld), for Modern Construction of Minnesota, dated 11/22/2021 by Demarc Land Surveying and Engineering Phase 1 Ponding Analysis, for Modern Construction of Minnesota, dated 2/25/2022 by Demarc Land Surveying and Engineering Geotechnical Report for Proposed Apartment Development, dated 8/25/2021, by Haugo Geotechnical Services Piezometer Water Level Summary for Otsego Apartment Development, dated 7/19/2021 and 8/25/2021, by Haugo Geotechnical Services Draft Traffic Impact Study – Mixed Use Development, dated 1/6/2022 by SRF Storm Water Management Plans – Revised 1/17/23 by Demarc Land Surveying and Engineering Additional Information Minnesota Rules, Chapter 4410 – EAW Requirement City of Otsego Engineering Manual City of Otsego Zoning and Subdivision Ordinances National Wetland Inventory Map PAGE 4 C:\Users\bethany.OTSEGO\Desktop\Mississippi Landing RVW2 Preliminary Plat.docx PRELIMINARY PLAT No comments FINAL PLAT No comments PRELIMINARY SITE DEVELOPMENT PLANS TITLE SHEET No comments DETAILS No comments EXISTING CONDITIONS & REMOVALS No comments. SITE PLAN GRADING AND DRAINAGE PLAN 1. Storm water from infiltration pond should be directed to the ditch to the south through a swale rather than overland 2. Fire lane is adequate in width and strength. Communications with ERFD should occur regarding if trucks turn radius are met with curves provided around building UTILITY PLAN 3. Hydrant coverage is now sufficient. 4. Maintain lift station operation during upgrade procedure. Flow of sewage could be collected in upstream structures via honey wagon (for low demand lines), or temporary pumps placed in an upstream structure and connected to the existing 3” FM at some point downstream of the wet well. Contractor will need to provide method and means for the upgrade process that will be acceptable to the City. – Developer has responded this will occur. PAGE 5 C:\Users\bethany.OTSEGO\Desktop\Mississippi Landing RVW2 Preliminary Plat.docx 5. Recommend the new 4-inch forcemain to be installed via directional boring from the wet well to the existing sanitary manhole, which will require core drill and boot seal. Ex. San MH lies close to Mn/DOT ROW, permit may be required. – Developer has responded this will occur. 6. Recommend a Variable Frequency Drive pump to mitigate flow surge. Will be determined during final plat and final design. 7. Are the power source and control panel sufficient with the upgraded pumps? Will be determined during final plat and final design. 8. Full plan set of the lift station including mechanical and electrical is required. Developer has responded this will occur during final plan and final plat design 9. Pumps and appurtenances will require final approval of the City Utility Manager. SWPPP No comments STORM WATER MANAGEMENT PLAN 10. Infiltration requirements appear to be met. Will require double infiltration ring test to verify infiltration is met WETLAND/ENVIRONMENTAL No comments. OTHER CONSIDERATIONS No comments SUMMARY AND/OR RECOMMENDATION Please revise and resubmit.