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<br /> . ~ <br /> Mr. Dan Winkel <br /> City of Arden Hills <br /> 1450 West Highway 96 <br /> Arden Hills, MN 55112-5794 <br /> RE: AMBLE DRIVE STORM SEWER <br /> C:'V!; Ur;;i!\i~:~,','~G <br /> Delli" ~Ar ~ '.}.linkel: <br /> .:",:PG\:'}':\~';l As requested, I have further researched the issue of diverting the Amble Drive storm sewer <br /> away from Karth Lake. In my previous memo, dated June 20, 1994, I had estimated the cost <br /> "/:~..;'C";>;\l to accomplish this diversion at $70,000. The break down of this is that approximately <br /> $27,500 worth of storm sewer would need to be added to the current Amble Drive project. <br /> ;:;\'\',~"i\'G The remaining $42,500 would be for storm sewer and street restoration along the Pleasant <br /> Drive alignment. <br /> .,ClUCTORA' As you requested, we have also analyzed the total tributary area to Karth Lake relative to <br /> S~;\tf{!NG how much area we would be diverting away with this storm sewer installation. From the <br /> City's aerial topography is appears that there is approximately one hundred acres of tributary <br /> ~ ",- ..' '-- area to Karth Lake. The Amble Drive area in question represents less than eight acres of this <br /> area. Therefore, the $70,000 expenditure would divert away approximately 8% of the entire <br /> :"Af\SPO~T;,,~,',YJ area. <br /> As you and I have previously discussed, this may not be the most efficient way to spend <br /> money on the lowering of the water level in Karth Lake. It would seem that $70,000 would <br /> be better spend toward a lift station, which could have the effect of lowering the lake level <br /> based on the tributary area. We have 1I0t estimated the cost nor the method of diversion <br /> utilizing a lift station. The one issue a lift station would not deal with would be the quality <br /> of the water in Karth Lake since the entire tributary area would run off and get there prior <br /> to being pumped out of the lake. <br /> 1326 Energy Park Drive Hopefully this information is helpful. If you have any questions, or need additional <br /> SI. Paul, MN 55108 information, please call. <br /> 612-644-4389 Sincerel y, <br /> Fax: 612-644.9446 MSA, CONSULTING ENGINEERS <br /> .9800 Sh~ard Parkway .::u-e.cptZU'U <br /> M;nneopol;s, MN 55441 Terry J. aurer, P.E. <br /> 612-546-0432 047-0708.jul <br /> Fax: 612-544-6398 <br />