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CONSULTING ENGINEERS <br />ULTEIG ENGINEERS, iNc. <br />5201 EAST RIVER ROAD, SUITE WS MINNEAPOLIS, MN 65421 <br />September 1, 1994 <br />Mr. Dan Krell <br />Lampert Yards, Inc. <br />9220 Hudson Blvd. <br />Lake Elmo, MN 55042 <br />Re. Lampert Yards, Lake Elmo, MN - Drainage Issues <br />Dear Mr. Krell: <br />I <br />PHONE 612-6 Jt-2600 1, <br />FAX612-6J1.11B8 ', I <br />3Ep 6 1494 <br />As we discussed with Mr. Jack Dolan of Dolan's Marine <br />yesterday, several independent steps to affect drainage on <br />the Lampert Yards' property have been suggested. These <br />steps, as outlined below, would serve to 1) further direct <br />runoff from the north storage area into the existing pond, <br />2) reduce the velocity of the runoff near the existing catch <br />basin just south of the pond, thereby reducing the erosion of <br />gravel and silt which has reportedly caused the area near the <br />catch basin to overflow on occasion, 3) limit any runoff from <br />Lampert Yards' property from going beyond their west property <br />line. <br />Item number 1 above would be achieved through establishment <br />of a Swale along the drainage path which would lead to the <br />pond. Portions of the north storage area, which now bypasses <br />the pond would be routed through the pond. This would <br />greatly reduce runoff volumes leading to the first catch <br />basin south of the pond. In addition, establishment of more <br />vegetation along the slopes of the drive leading to the north <br />storage area would decrease any erosion of those slopes. <br />Item number 2 above could be achieved by reducing the slope <br />of the gravel immediately adjacent to the catch basin in <br />question. This slope reduction would limit runoff velocities <br />below scour velocities which now appear to carry gravel, sand <br />and silt to the catch basin and plug it up on occasion. When <br />the catch basin were to plug up, the area would pond and <br />ultimately overflow to the west, toward Dolan's Marine. As <br />Mr. Dolan stated in our meeting yesterday, he observed the <br />area of this catch basin during a recent heavy storm, and the <br />catch basin functioned normally, without the presence of <br />aggregate blocking it up. He felt there was no problem with <br />overflow until a blockage took place. <br />EQUAL OPPORTUNITY EMPLOYER <br />