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SEP-~0-1996 <br /> <br />1326 Energ <br /> <br />St. Paul. MN 55108 <br /> <br />Z-800-888-2923 <br /> <br />I:a~: 612-644-9,~6 <br /> <br />September 20, 1996 <br />File: 230-332-11 <br /> <br />Mr. Steve Ach <br />City Planner <br />City of Elk River <br />13065 Orono Parkway <br />P.O. Box 490 <br />ELk River, MN 55330 <br /> <br />RE: D-J's HOME CENTER SITE PLAN REVIEW <br /> <br />Dear Mr. Ach: <br /> <br />P.02×03 <br /> <br /> OV1L ENGIN:EMNG: <br /> ENVlRON~ENT^L <br /> ',4UNICtPAL <br /> <br />· I~.ANN~/O <br /> <br />SOLID WA~E <br />Sl'RUCI'UE AL <br />SURVEYING <br /> <br />11~AFFIC <br /> <br />'D, ANSPO~TATION <br /> <br />ENGINEERING: <br /> <br />mAC <br />POWER DrSTRJBUTION <br /> <br />51'STD4 <br /> <br /> 'FFICE$ IN: <br /> <br />ST. PAUL <br />WASECA <br /> <br />As requested, we have reviewed the Grading and Drainage Plan for DJ's Home Center. <br />The Site Plan was prepared by John Oliver & Associates, and was dated and had a <br />revision date of August 22, 1996. Based on our review, we would offer the following <br />comments: <br /> <br />This property is a relatively long aM narrow parcel. It appears from the existing <br />contours that natural flow of drainage was from .west to east across the parcel. <br />There is not enough information provided to ensure that the natural drainage from <br />the property to the west will be allowed to continue to flow. The existing 874 <br />contour .just ends on the property to the west. It is unclear whether or not a large <br />flat area will be created by the proposed grading on D-J's parcel. More <br />information should be provided. <br /> <br />Around the proposed building, there is an 873 contour that is shown and it is <br />labeled as a 1% grade. Actually, to create a 1% grade, that contour will have to <br />be cut back and ended further south on both the east and west side of the building. <br /> <br />There is a piece of pipe labeled as I2" PVC that just rurkq from the south end of <br />the building to the south end of the property, where a detention pond is to be <br />located. There is no indication of how water will flow into this pipe, and no <br />storm dmimge calculatiom have been provided to indicate whether the pond will <br />discharge or not. If the pond is intended to discharge, it is not clear how this will <br />occur. Calculations should be provided to indicate how the pond was sized and <br />what the intent is as to whether it will disc 'hazge or not, and also how much of the <br />existing flow from the west was sized into this pond. <br /> <br />An Equal OppormniLy Employer <br /> <br /> <br />