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, , � -� <br /> 9 I • <br /> Ms: Barbara Walther <br /> Ms. Becky Houdek � <br /> Mr. John smyth � REC�IVE� <br /> January 15,2010 <br /> Page 2 <br /> ,IAN 1 8 2010 <br /> � CITY OF ORONO <br /> PRO]ECT BACKGROUND � <br /> The applicant owns and operates the Wayzata.Country Club,which includes an 18-hole golf course. <br /> Within the golf course are a number of drainage ditches that provide drai.nage of the golf course and <br /> neighboring properties. Within the southeastern portion of the subject properiy(south of Luce Line <br /> trail,north of Wayzata Boulevard, and east of Old Long Lake Road) exists a significant drai.nage <br /> ditch,which drains toward the south and into Peavey Lake and eventually Lake Minnetonka via <br /> ditches,pipes, and culverts. In 2009 the applicant converted the northern 1,1001inear feet of the <br /> drainage ditch into a stormwater pond,which was permitted by the Minnehaha Creek Watershed <br /> Dislxict(Permit No. 08-341) and the U.S. Army Corps of Engineers (2008-05271-BLV�. Wetland <br /> impacts associated with the 2009 pond project included 25,704 SF of a Type 2 wetland. <br /> Approxixnately 32,581 SF of New Wetland Credit(NWC) and 41,935 SF of Public Va1ue Credit <br /> (PVC)was provided on-site as replacement for the proposed wetland ixnpact. <br /> Three wetland mitigation basins were constructed in the late-winter/early-spring of 2009 as <br /> replacement for the impacted wetland. MFRA examined these areas for the extent of wetland <br /> characteristics during the 2009 growing season and determined that they were constructed slightly <br /> larger than proposed,resulting in 12,722 SF of excess wetland area. In addition, approximately . <br /> 28,514 SF of extra upland buffer was esta.blished in order to meet the City of Orono buffer <br /> requirements. Because of inembership complai.nts,the applicant wishes to abandon Mitigation Basin <br /> C from the previously approved Wetland Mitigation Plan and utilize a portion of the excess wetland <br /> area created in 2009 in place of the Mitigation Basin C. The applicant wishes to use the remaining . <br /> 3,967 SF of wetland credits and a portion of the excess upland buffer as wetland mitigation for the <br /> proposed wetland impacts associated with the 2010 pond expansion project. <br /> PROPOSED PRO]ECT <br /> The currently proposed project involves the exparision of the previously constructed stormwater <br /> pond further south, encompassing the remaining 3001inear feet of the drainage ditch. The proposed <br /> project involves the conversion of a Type 2 wetland,which was delineated in the fall of 2008, into a <br /> stormwater pond exhibiting water depths of approximately 8 to 10 feet, aquatic vegeta.tion, and <br /> bordered by rock riprap. The stormwater pond expansion project will involve similar activities that <br /> were completed during the 2009 project. A water control structure (weir)will be placed at the <br /> existing pipe outlet at the southernmost end of the dra.inage ditch. Currently the drainage ditch <br /> exhibits fairly steep sideslopes and a dominance of non-native, invasive vegetation such as reed <br /> canary grass.A MNRAM assessment of the existing drainage ditch was completed in 2008 and <br /> indicated that the ditch has low to medium wetland functions and values. The proposed stormwater <br /> pond will improve water quality of the golf course stormwater as it's the last opportunity to treat <br /> stormwater from the subject and neighboring properties prior to reaching Lake Minnetonka and <br /> � other downstream waters. <br />