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Hw0^ <br />d <br />MINUTES OF A PLANNING COMMISSION MEETING HELD JANUARY 16, 1978 - PAGE 13 <br />The Zoning Administrator explained he had received <br />a letter from Jim Anderson, from the Hennepin <br />Soils & Conservation District, in reference to <br />the proposed spoil disposal area. The letter <br />stated this area does not seem to indicate the <br />presence of a wetland. <br />Mr. Diederich passed out two letters, one from <br />Dr. Wood dated 1-16-78 and one from Mr. Novak <br />dated 12-28-77. <br />Dr. Wood reviewed his letter explaining procedures <br />of supervision of the project. He indicated the <br />water from the dredge could be retained by tempor­ <br />arily sealing off the culvert under Old Beach <br />Road. He also felt the level of the wetlands <br />would only be elevated a few inches. He stated <br />the> check daily the nitrogen and phosphorus <br />levels in the wetlands, adding that the dredging <br />plan is ideal because the wetlands can be used ais <br />a holding pond so there will be no contamination <br />of Uke Minnetonka. He also stated that during <br />this dredging activity they would examine the <br />run-off from the Super Value parking lot and study <br />lead and oil contamination of the wetlands. <br />Also, they could study what affect the cars driving <br />around the lake have on the quality of the lake. <br />Mr. Novak explained how they planned to dispose <br />of the material dredged from the channel. He <br />stated they have to contain the dredged slurry for <br />a certain period of time to Allow the dredged <br />material to settle out of the water. Also, they <br />have designed the spoil area to exceed the 7 day <br />retention time so as to meet the water quality <br />standards established by the Minnesota Pollution <br />Control Agency. <br />He continued that an average of .75 ft. of slurry <br />would be deposited in the spoil area daily and <br />would be filled to 707. of total capacity after <br />7 days of pumping time. After the 7 days of <br />dredging they would begin decanting the water <br />back into the lake. This process would continue <br />daily until the project is completed. <br />Mr. Diederich stated there are two processes: <br />1) in the holding area water will be held; and <br />2) the water will decant into the marsh where <br />the nutrients will dissolve. <br />WEST SHORE LAFAYETTE <br />BAY ASSOCIATION <br />2440 OLD BEACH ROAD <br />DREDGING & DISPOSAL <br />OF SPOILS <br />#319 <br />Commissioner Frahm felt the rate of flowage was high.