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Sfs. Jeanne A. Mabusth <br />City of Orono <br />Page -2* <br />Januurv 7, 1^94 <br />will be on the Coffin Parcel, at two locations. The grading of th,* southerly cul-de-sac is <br />shown 7 feet higher than the adjacent wetland. The cul-de-sac -hculd be either lowered or <br />moved south to avoid the setback encroachment. The other encroachment is at the <br />southeast comer of the Coffin Parcel where a detention pond is proposed. This appears to <br />be a logical location for the pond which will function to protect the wetland from sediment <br />deposition. <br />All other wetlands that have been delineated are regulated at the State level by the Wetland <br />Conservation Act These rules require the replacement of any filled wetlands at a 2:1 ratio <br />based on area. This ratio applies for replacement with the same type (or a higher quality) <br />of wetland that was filled. At the Federal level the wetlands are regulated by the U S. <br />Army Corps of Engineers. The plan shows some of the wetland areas that will be filled as <br />part of the site grading, as well as the wetland replacement mitigation area. The wetland <br />alterations and 2:1 compensatory mitigation should be reviewed and approved by the <br />Minnehaha Creek Watershed District (LGU) and the U.S. Army Corps of Engineers. <br />The site drainage is routed through established drainage routes onto adjacent properties. <br />These downstream properties should be inve.stigated for their capaciw to handle an increase <br />in storm water runoff. Specifically, near Lot 7 and Lo» 5 on the Colfin Parcel and Lot 6. <br />Block 1 and Lot 8 on the Dickey Parcel. Runoff and ponding calculations should be <br />provided for our review. <br />Drainage and utility easements will be required 5 feet wide along all lot lines . nd 10 feet <br />wide along the roadway riglH-of-ways. Drainage easements should be provided ovei the <br />ponding, wetland and ^tigarion areas^s <br />Please contact me at this office if you have any questions regarding this matter. <br />Yours verv trulv, <br />BONESTROO, ROSENE, ANDERLIK & ASSOCIATES, INC. <br />/' <br />Shawn D. Gustafson. P.E.