Laserfiche WebLink
Ms. Katie Larsen <br />June 6, 2018 <br />Page 4 <br /> <br /> <br /> S:\Community Development\Projects\Planning Cases\Nature's Refuge\Staff Reports\20180611 CC (RZ & PUD PP)\20180611 v2 (revised 20180608)\a2 2018060 <br />Addressed for Stormwater Management Plan and HydroCAD. Applicant shall <br />update the SWPPP. <br />6. See Table C3 in RCWD Rule C: Stormwater Management Plans for maximum curve <br />numbers for existing conditions and adjust modeling accordingly. See section 4b for <br />adjustments to curve numbers for proposed conditions. Curve numbers changed to <br />match RCWD rules <br />7. The applicant shall confirm that the names of wetlands match between the existing <br />conditions map and the existing conditions HydroCAD model. Node IDs are changed <br />8. The applicant shall provide the wetland susceptibility class, bounce, and inundation <br />periods for impacted wetlands. See Table C4 and section 8 in RCWD Rule C. <br />None of the wetlands provide retention or significant bounce in existing or proposed <br />conditions because there is not a well-defined storage or outlet component. <br />The submitted HydroCAD model indicates that wetlands on the site have storage <br />and outlets. Please provide wetland susceptibility class, bounce, and inundation <br />periods for impacted wetlands. <br />9. The applicant shall refer to Table C5 in RCWD Rule C for soil infiltration rates. <br />Comment Noted <br />Applicant shall update infiltration rate in HydroCAD model for IB10 to be <br />consistent with soil boring and Table C5. <br />10. The applicant shall update water quality standards to be consistent with the requirement <br />to treat 1.1-inches of runoff for new or reconstructed impervious surface per section 6c <br />of RCWD Rule C. See Table C1 in RCWD Rule C for the TP removal factor for <br />stormwater ponds and apply as necessary. The applicant shall verify that the site is <br />meeting water quality treatment standards. Meeting the standards is not feasible on this <br />site due to the high water table. <br />The applicant needs to meet water quality standards for the site. Please update <br />Appendix C to account for the TP removal factor indicated for stormwater ponds <br />(Table C1 in RCWD Rule C or Table 2 in Lino Lakes Code of Ordinances Chapter <br />1011). The applicant shall consider including a water quality discussion in Section 2 <br />of the Stormwater Management Plan. <br />11. The applicant shall verify HWLs for ponds. In some instances, they differ between the <br />HydroCAD modeling and the plans. HWLs confirmed. <br />The applicant shall revise the HWLs on the plans to match HydroCAD modeling. <br />12. The applicant shall clarify the intent of the low area on Outlot D. If intended to be a <br />stormwater pond, please include it in modeling. Node added <br />13. The applicant shall revise the ACD number it varies throughout the Stormwater <br />Management Plan and SWPPP narratives. Comment Noted and ditch ID consistent in <br />report <br />Addressed in Stormwater Management Plan. Applicant shall update the SWPPP. <br />14. The applicant shall verify the lot lines on Lot 12 Block 4, Lot 4 Block 1, and Lot 5 <br />Block 1. It appears the structures may encroach on the drainage and utility easements. <br />Plan updated. <br />The applicant shall verify the lot lines on Lot 24 Block 7. It appears the structure <br />may encroach on the drainage and utility easement. <br />15. The applicant shall include the bottom elevation of the infiltration basin on the grading <br />plans. Elevations added.