Laserfiche WebLink
Stormwater Narrative/Summary March 11, 2025 <br />Woodhill CC – Course Renovation Project <br />Wayzata, MN <br />3 | P a g e <br /> <br />connections are maintained, with the large east pond complex (pond P12) continuing to route through <br />Wetland P2 before continuing into the south wetland complex (pond P10). <br />Ponds P14 and P15 currently do not have functioning outlets and are required to be pumped by golf course <br />staff to lower water levels. P14 and P15 (WCA No-Loss) are proposed to be drained, filled with onsite soils <br />and replaced with area drains and pipe that will connect into the trunkline storm sewer network. An outlet <br />control structure with compound functioning weir is proposed to be installed to mitigate the loss of storage <br />from P14 and P15. Reference Appendix F - Inundation and Rate Tables the proposed bounce and <br />inundation for Wetland P2. We will be requesting a No-Loss Application to justify that the proposed work <br />is within incidental wetlands and does not impact non-incidental wetlands. Pond P7/9 is proposed to be <br />excavated and expanded from the existing condition to provide additional storage. An outlet control <br />structure is also proposed to replace the existing 12” PVC outlet culvert that feeds into the pumphouse. <br />The proposed drainage pattern can be seen in Appendix D - Proposed Drainage Map and the proposed <br />HydroCAD report can be seen in Appendix E - Proposed HydroCAD Report. <br />Stormwater Management <br />The project proposes to reconstruct 0.55 acres of impervious surface (cart path) and remove 0.26 acres <br />of impervious surface (cart path). As the project will result in less than 1.0 acre of reconstructed <br />impervious, the Stormwater Management Rule does not apply. Please see Appendix F Inundation and <br />Rate Tables for the inundation and bounce for Wetland P2 and the existing and proposed rates leaving <br />the site. <br />Waterbody Crossing and Structures <br />The project proposes replacing the existing inlet and outlet pipe for Wetland P2 and the existing outlet <br />pipe to Wetland P10. Since these pipes exist today and are simply being replaced at the same elevation, <br />the Waterbody Crossing and Structures rule will not be triggered. <br />Summary <br />The proposed project meets MCWD/Orono & Wayzata requirements for grading and erosion control, <br />stormwater management, as well as the waterbody crossing and structures. <br /> <br />141