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jimpth survey, for the south bay of <br />B results of the lake d1li <br />Lake, Wabasso indicate <br />and, <br />t function of <br />undocumented dredging that has occurredo <br />90 The analysis of aerial photographs since 1937 does not show <br />a significant decreaise in the size of the open water area at <br />Park <br />either Lake, <br />r «" • i <br />Ii <br />100 'The d,riedgiinig option, is only appl,i,cabile to Lady Slipper Park <br /># I I S130rOOO-150 0000 <br />and, , <br />�ves an estimated cost ► <br />T sedamentiation basin, is considered to be feasible only for <br />estimated Lady Slipipie,r Park,, wiith an <br />• <br />r Aqiu,ait,ic herbicide <br />i' for both sites <br />year, much, as $2,5100 pier <br />that would r,esult f rom the die-of f of' vegetation af ter <br />treatment cou- - negative <br />13 Weed harvesting is - siaf'e and commonly used management <br />techniqueiii but could cost as much as $6 j, 000 per year <br />assuming harvesting is done'twice a year for each site. <br />1,4 Aquatic slun shades are, not considered feasible due to th <br />large vlolum,e of water <br />