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Vest Shore Lafayette Bay Association <br />2440 Old Beach Road <br />Dredging <br />r* <br />*■». I <br />fi C) <br />Pg 5 <br />1 <br />Z inifht add, Kr. r>woen, that any diking should have <br />fit least a V hori zon Lai: vortical; .*rloi)e to insure <br />the structural integrity of the dike and to guard <br />against water erosion. <br />Once dredging operations are started, an average of <br />,75 feet of slurry would be deposited into the spoil <br />area daily based on the following criteria. <br />1, Cross-sectional area of the spoils basin <br />is 176442 sq. ft. <br />2, Estimate is based on pumping an average <br />of 2000 gallons of slurry per minute, 8 <br />hours per day. <br />Based on the above, the spoil area would be filled to <br />70 percent of total capacity after 7 days of pumping <br />time. After 7 days of dredging we would begin to <br />decant the water back to the lake through the pipe <br />stand arrangement shown on the attached map. The <br />decanting process would then be continued dally for <br />the duration of the project. <br />As you know, p*r, Cwcen, the Fresh Water Plolorlcal <br />Institute has aggrjed to assist us in our effort to <br />ensure optimum wuter quality standards are met by <br />continuously -onicoring the suspended solids content <br />of the return water. If their tests dicthte, it will <br />be necessary for us to cease dredging operations until <br />water quality standards can be met. <br />Upon completion of dredging operations the spoil area <br />will be drained of all water. The next step would be <br />to level off and contour the dikes and dredged mater­ <br />ial, By proper placement of the discharge pipe it <br />will be possible to end up with basically the same <br />ground contours as presently exist with a minimum <br />of landscaping. The main difference will be that the <br />present ground contours will be approximately 2 feet <br />higher in elevation. If you wish, however, we can place <br />the material as shown in either of the proposals as <br />drawn up by the Gordon R, Coffin Co., Inc. <br />In summary, the spoil area will he large enough for <br />us to pump 9 to 10 days before having to return any <br />water to the lake, thus allowing ample settling time. <br />Upon completion of dredging nnd landrcaplnr Ihf r.poll <br />area could be seeded resulting in a grassy moatow as <br />now exists. <br />Sincerely yoiirs, <br />Ron Kovak, V.P. Operations <br />Kini-Dred,,e. Inc. <br />•i