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Ms. Rachel Juba <br /> July 8, 2022 <br /> Page 2 <br /> property and property to the east as it may be more effective to serve the entire development <br /> from the lift station. The depth of the sewer in Fairoaks Avenue is not of sufficient depth to <br /> serve the developable area to the east nor the majority of the subject property. Once the <br /> applicant can provide a grading plan, staff can further evaluate and provide recommendations <br /> prior to laying out the sanitary sewer to service the site. <br /> 8. If the project is to be phased, a staging plan will be required to be shown with utility work <br /> being identified to occur within the final platted area only. If grading is different from the <br /> phasing plan for utilities or final plat area, a plan addressing temporary drainage measures <br /> outside the platted area will be required. <br /> Stormwater Management/Wetlands <br /> 9. Volume control/water quality standard will be required, which is 1.1 inches off new impervious <br /> surfaces.Water reuse will be the preferred BMP option for the site for volume reduction. If an <br /> additional BMP is to be used, the TP removal factor from RCWD Rule C, Table C1. must be <br /> applied. <br /> 10. Peak stormwater runoff rates for the proposed project must not exceed existing rates for the <br /> 2-year and 10-year 24-hour rainfall events using Atlas 14 rainfall depths. <br /> 11. Peak stormwater runoff rates for the 100-year 24-hour rainfall event is limited to 0.1 cfs/acre. <br /> 12. Lowest building opening must be at least 3' above the 100-yr HWL for both wetlands and <br /> BMPs and 4' above the current groundwater elevations. <br /> 13. Private ditches to JD3 are located onsite. Maintain private ditch drainage to JD3. Developer <br /> to confirm with RCWD if a permit for Rule I is needed. <br /> 14. No 100-year floodplains located onsite. <br /> 15. Stormwater Management facilities will be required to be within drainage and utility <br /> easements. <br /> 16. The applicant is proposing to utilize stormwater reuse as part of their stormwater <br /> management plan. <br /> 17. A wetland delineation on the parcel has been completed. <br /> 18. The concept plan shows a number of impacts to wetlands. The applicant may find it helpful <br /> to have a pre-application meeting with the Technical Evaluation Panel to get a better idea of <br /> what impacts may or may not be allowed <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 651-286-8463. <br /> Sincerely, <br /> WSB <br /> a F"e�� <br /> Mark Erichson, PE <br /> City Engineer <br /> cc: Scott Anderson, Public Works Director(email only) <br /> Liz Finnegan, Senior Engineering Technician (email only) <br /> S:\Users\R_Juba\DEVELOPMENT PROJECTS\Drake Property Sketch Plan\Engineers Memo <br /> Oneka Prairie 070722.docx <br />