Laserfiche WebLink
cH O sWard R, Green Oompany <br /> ULTING ENGINEERS <br /> June 22, 2000 <br /> File: 809790J-0240 <br /> <br />Ms. Michele McPherson <br />Director of Planning <br />City of Elk River <br />13065 Orono Parkway <br />Elk River, Minnesota 55330 <br /> <br />RE: <br /> <br />TVVIN LAKES TOWNHOME DEVELOPMENT <br />CITY OF ELK RIVER, MINNESOTA <br /> <br />Dear Ms. McPherson: <br /> <br />As requested, we have reviewed the submittal package for the Twin Lakes Townhome <br />Development. The plan set contained three sheets: preliminary site and utility plan, preliminary <br />grading plan, and preliminary landscape plan. All three plans were prepared by Pioneer <br />Engineering and had a revision date of June 19, 2000. Based upon our review, we offer the <br />following comments: <br /> <br />A. Preliminary grading plan <br /> <br />There are several locations on the grading plan with rear yard storm sewer inlets <br />and storm sewer which flows through side yards. In each of these locations an <br />emergency overflow elevation needs to be established and shown on the grading <br />plan. City policy is that all adjacent buildings to these emergency overflows need <br />to have the lowest opening at least one foot above the emergency overflow. <br />The large wetland complex in the southwest corner of the site has a hundred <br />year high water level shown at 908.8. It appears from the existing topography <br />that this elevation may come very close to flooding the building located just west <br />of the site on 5th Street. More information is needed relevant to this high water <br />level. <br />There are wetland impacts shown in the east corner of the plat where the existing <br />ditch flows. These will need to go through Steve Rohlf's office relative to the <br />wetland process. It is my understanding that the developer's intent is to take that <br />portion of the plat and make it a second phase so that there is adequate time <br />allowed for the wetland process to be followed. <br />Building 34/35 has been lowered slightly so that the proposed retaining wall <br />between that building and the adjacent property is lower in height. It appears <br />that the retaining wall will be approximately four feet in height. As discussed at <br />the last Planning Commission meeting, no grading should be allowed within the <br />drip line of trees along the perimeter of the two private properties located in the <br /> <br />Lt~062200-McPherson.doc <br /> <br />1326 Energy Park Drive o St. Paul, MN 55108 o 651/644-4389 fax 651/644-9446 toll free 888/368-4389 <br /> <br /> <br />