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West Shore Lafayette Bay Association <br />2AA0 Old Beach Road <br />Dredging <br />Pg 5 <br />i . <br />1 inifljl odd, I'"r. I'wcen, that any dikinf. should have <br />at Icaut a ?:1 i >'or j xon s.al : vor li cal J rlo])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 c.^pacity 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 daily for <br />the duration of the project. <br />As you know, Vt. Cwcen, the Fresh Water Piolorlcal <br />Institute has aggreed to assist us in our effort to <br />ensure optimum water quality standards are met by <br />continuously monitoring the suspended solids content <br />of the return water. If their tests dictate, it will <br />be necessary for us to cease dredging operations until <br />water quality standards can be met. <br />Upon completion of dredging ope: ations 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 th' <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 be 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 dredginc r.nd l uidrcaplnr the r.poll <br />area could be seeded resulting in a grassy moadow as <br />now exists. <br />Sincerely yqtlrs. <br />/L <br />Ron Kovak, V.P. Operations <br />Kini-Dredge, Inc, <br />I