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Ms. Rachel Juba January 16, 2020 Page 2 5. Lowest openings of structures must be 3-feet above the Atlas 14 100-year HWL for all waterbodies and BMP's and 1-foot above any EOF. 6. Erosion Control will be required to meet requirements for the NPDES stormwater permit ad SW PPP requirements. Stormwater Management 7. Volume Control: Stormwater BMPs must be provided to meet a volume of 1.1 inches from new impervious surfaces. Infiltration BMPs and water reuse will receive full credit. Other BMPs such as filtration must incorporate a TP removal factor found in Table C1 of Rule C of the RCWD rules. Water reuse is the preferred BMP for residential developments. 8. Water quality requirement will be considered met if volume control is met. At a minimum, 85% of the site is required to be treated. 9. Rate Control: Proposed discharge rates must be less than existing rates for the 2, and 10- year Atlas 14 rainfall event. Proposed100-year Atlas 14 discharge rates must meet 0. cfs/acre for the site. 10. A regional stormwater management for the site as proposed is appropriate and recommended. Overall sizing of the stormwater management needs has yet to be reviewed. Once appropriate submittals are provided as part of the preliminary plat process, staff will review for compliance with requirements.. 11. Conditions for stormwater reuse for the site is ideal and should be incorporated into the project. Stormwater reuse can be used to aid in meeting stormwater management requirements for the site. 12. RCWD rules prohibit fill within the floodway. City Ordinance states no structure will be allowed in the floodway that will increase the base flood elevation or cause an increase in flood damages in adjacent reaches. 13. Fill within the floodplain requires compensatory storage. 14. CLOMAR/LOMR will be required to be submitted to MnDNR/FEMA for approval of any modifications to the floodway/floodplain. Typically, no habitable structures are allowed to develop in the floodway. 15. The proposed modifications to public drainage system (alignment as proposed) would need to go through a formal petition process with RCWD. 16. A RCWD permit will be required for Rule G for the proposed crossing of Judicial Ditch 3 and Rule I for drainage systems. Wetland 17. A wetland Delineation for the site has been submitted. 18. If there are proposed wetland impacts, this site would be ideal for on -site replacement. 19. Wetlands on this site may be ACOE jurisdictional and should be a consideration moving forward. A preapplication meeting would be beneficial.