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05-22-1978 Planning Packet
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05-22-1978 Planning Packet
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5 <br />» <br />• 4 <br />The West Lafayette Bay Association and WAWAPADC(f, ^the <br />dredging contractor, hereby provide the information requested by the <br />Planning Commission. <br />1. The slurry volume based on eight hours pumping per day at 1500 gal/min <br />2. <br />3. <br />4. <br />5. <br />6. <br />7. <br />1500 X 60 min. x 8 hours * 720,000 gals/day <br />720,000 ^ 96256 cu. ft. 3565 cu* yds/day <br />7.48 27 <br />3565 cu. yds x 5.5 =* 19607 cu. yds/week <br />The dikes will be constructed by pushing up dirt from inside the <br />disposal area with a D-6 Cat to elevation of 940 feet and 942 feet <br />as shown on attached contour section. Seal of dikes Insured by <br />compaction of D-6 going up Inside of dikes. <br />The Spoil Area will have two berms with a total capacity of approx <br />imately 70,000 cu. yds. This will provide retention of water and <br />spoils for over 3 weeks. With normal evaporation and absorbtion <br />there may be no discharge from the berms. (3 x 19607 * 58821 cu. yd.) <br />Daily monitoring of dikes and possible water discharge will be <br />done with lab tests three times per week as per MPCA requirements <br />for any possible discharge from berms. <br />With culvert from wetlands to Lake Minnetonka blocked, the water <br />quality of the wetland will be tested to insure that the nutrients <br />are less than Lake Minnetonka levels before any water discharges <br />from the wetland are allowed to flow into the lake. <br />Dredging will stop if any possibility of overflow seems possible <br />from marsh. <br />Culvert will be partially blocked before dredging starts to allow <br />run-off from any rainfall until berms are nearly full and then <br />it will be blocked completely. <br />. I . t <br />VILLAGE CC Cr.CIfQ
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