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<br />Engineers | Architects | Planners | Scientists <br />Short Elliott Hendrickson Inc., 3535 Vadnais Center Drive, St. Paul, Minnesota 55110-5196 <br />SEH is 100% employee-owned | sehinc.com | 651.490.2000 | 800.325.2055 | 888.908.8166 fax <br />MEMORANDUM <br />TO: Evan Monson, Community Planner <br /> <br />FROM: Justin Gese, PE City Engineer <br /> Dustin Cesafsky, Engineering Specialist <br /> Emily Jennings, PE Water Resources Engineer <br /> <br />DATE: August 23, 2024 <br /> <br />RE: Barnett Kia of Gem Lake – Development Submittal 7/23/24 <br /> Review Comments <br /> SEH No. GEMLK 171858 14.00 <br /> <br /> <br />Below are our initial review comments for the Barnett Kia development information that was submitted on 7/23/24. <br />If you have any further questions, please arrange a follow-up meeting with the City, the Developer, and their <br />engineer to address any questions you have pertaining to the comments. <br />General Notes: <br />· The project must obtain coverage under the MPCA’s CSW Permit. <br />· The City’s Ordinance has been updated. Review and revise submittal as needed to comply with City <br />Ordinance No. 141, Section 22.1. Erosion, Sediment, and Waste Controls. <br />· The City’s Ordinance has been updated. Review and revise submittal as needed to comply with City <br />Ordinance No. 141, Section 22.1. Stormwater Management. <br />Submittal Comments: <br />1. Add excavation limits around the infiltration chamber. <br />2. Add storm outlet pipe size in the NW property corner. <br />3. Call out tip out curb transition where there’s a low point in the curb but no Catch Basin. <br />4. Call out the tie in elevations at Scheuneman along with the valley gutter grade. Where will the grade transition <br />be? The road drains north and the entrance drains south. <br />5. Add commercial concrete aprons at the entrances. <br />6. Update or remove rim elevation from EX SSWR MH1, add connect to existing call out. <br />7. Include a detail for the UG INFIL connection method. <br />8. Provide easement documentation for realigned property line, include enough easement for City to maintain <br />the storm system (10’ offset?) on each side of property line and sewer line. <br />9. CBMH G1 should be private but extends across property line. Should not be public as it conveys into the <br />private system. <br />10. Replace segment of 21” pipe in NE corner of lot between new infrastructure segments. <br />11. Include the material type for the Stormwater chamber CMP. <br />12. Provide a table showing the total site area and impervious areas broken out for the 3610 Barnett Kia site and <br />adjacent 3700 Hwy 61 site. <br />13. Provide a table with permanent storage volumes broken out for pre-treatment chambers and infiltration <br />chambers. Ensure consistent dimensions and information of the proposed system throughout the SWMP, <br />plans, and models.