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December 14, 1990Permit Application No. 9Q»126 <br />Applicant: QairRood <br />2215 Kenwood Way <br />Wayzata, MN 55391 ^ <br />Location: City of Orono, Sec. 17DD <br />Purpose: Digging to create an open water pond in a wetland and fill and excavation in a <br />. floodplain area. <br />Anniicable Rules: Rule C - Floodplain Altaadon <br />Rule D - Wetland Alteration <br />Rule E • Dredging <br />Kahibits Reviewed ! <br />1. <br />2. <br />3. <br />Pennit Application 90-126 receiv^ October 8,1990. <br />Chading pun received October 8,199C <br />4. <br />5. <br />6. <br />Letter nom the District to the applicant dated October 22,1990 informing him of the Board <br />action on October 18.1990. <br />Revised site plan received December 10,1990. <br />Hydrolo^ calcularicms received December 10,1990. <br />delineating subwater'hed received December 10,1990. <br />Staff Review Summary; <br />The project involves dredging to remove 2,774 cubic yards of material from ? wetland to provide <br />an open water pond 5 feet deep with 4:1 side slopes. The project is located north of the <br />Cinintersectioa of Navaire Lane and Hillside Place in the City of Orono. The wetland is connected to <br />Crystal Bay, Lake Minnetonka by a culvert with an invert elevation of 927.93. Therefore, t^ <br />wetland acts as pan of the floodplain for Lake Minnetonka. Spoil is to be placed adjacent to the <br />pond at a slope of ^>prOKimately 3.5:1. Fill is to be placed withm the wedai^ along the east edge. <br />Excavation is to be provided along the west edge to compensate for storage capacity loss within die <br />floot^lalh. It is unclear from the information submitted whether the proposed excavation is at the <br />same elevation as the filL <br />This project was reviewed and tabled * the regularly scheduled October meeting of the Board of <br />Maiugm. The Orono Planning C omission has tabled this project. The next Planning <br />Comriussiop netting is Janua^ 22, If 1*1. District rules specify tlut the Nianagers will review <br />ttiplkations fv permits involving land development only after the applicant demonstrates that the <br />plan has receivM preliminary approval irom the municipality indicating compliance with the <br />municipal plans. <br />Recommendation <br />Table ling recent of: <br />1.Stage/storage relationship for the wetland for both existing and proposed conditions <br />beginning at the runout elevation of Lake Minnetonka of 928.6 providing no net decrease in <br />stormwater storage capacity at various stages. <br />2.Revised plan providing maximum spoil disposal slopes of 4:1 and revised silt fence <br />installation detail providing wire mesh reinforcing for the silt fence and posts spaced no <br />gtea^ than 4 feet apart <br />3.Review and qtprt.al by the Qty of Orono. <br />Project Review Statu s bv Other f»ovgrninentfll Units; <br />Qty of Orono is currently reviewing this project <br />8 of 19