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Ms. Rachel Juba <br />December 10, 2020 <br />Page 2 <br />constraints. The applicant is proposing a discharge rate of approximately 0.5 cubic feet per <br />second per acre where the existing rate is 6.1 cubic feet per second. The site outlets through <br />an existing culvert to a private ditch which leads to a large wetland complex. Because of this <br />and because the proposed discharge rate is less than existing, the proposed discharge rate <br />is not anticipated to have a negative impact downstream. Rice Creek Watershed District <br />requirements are being met. <br />7. Due to site constraints, the structures onsite are unable to meet the three-foot freeboard <br />requirement with respect to stormwater pond and biofiltration basin. The City ordinances do <br />allow for freeboard standard be lowered to a minimum of two feet with some additional <br />requirements. The applicant still needs to submit documentation that the additional <br />requirements are met however it is believed that this should not be an issue. The currently <br />proposed freeboard separation is approximately 2.5 feet, which meets Rice Creek Watershed <br />District’s requirements. <br />8. Additional stormwater plan and model comments have been provided to the applicant and will <br />need to be addressed in future submittals for documentation and permitting purposes. <br />9. A stormwater maintenance agreement and drainage and utility easements will be required <br />for the stormwater basins on the site. <br /> <br /> <br />Thank you for the opportunity to provide comments on this project. Additional comments may be <br />necessary following the review of the responses to these. If you have any questions, please do <br />not hesitate to contact me at 651-286-8463. <br /> <br />Sincerely, <br /> <br />WSB <br /> <br /> <br /> <br />Mark Erichson, PE <br />City Engineer <br /> <br />cc: Scott Anderson, Public Works Director (email only) <br /> Liz Finnegan, Senior Engineering Technician (email only)