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<br />FLOOD FIGHTING METHODS 2003 <br /> <br />6.3A <br />Page 42 <br /> <br />Avoid driving stakes in a straight line; this tends to cause <br />cracking and sloughing of the slope. To provide added <br />strength and leverage, drive stakes at a slight angle away <br />from the water source with the wide (3") side facing the <br />water. Be sure the stakes are well into the ground and are <br />secure. <br /> <br />When rolling out the plastic sheeting it is helpful to use a <br />shovel or similar long-handled tool. Eight to ten people <br />should assist in shaking out the folds of the envelope. Be <br />sure that both layers are held while the envelope is <br />shaken out. Hold on tight! Use caution in strong winds. If <br />the wind catches the plastic it could billow out and pull you <br />along with it. <br /> <br />While flood workers hold the plastic securely, toss tied <br />sandbags into the envelope. The tied sandbags are thrown <br />into the bottom of the envelope with a one-foot gap <br />between bags. The tied bags provide weight to hold the <br />plastic against the levee slope. <br /> <br />A tie-down button or small stone (preferably round) is <br />secured through both layers of visquine. <If a stone is <br />used, tie a slip knot and double half-hitch to secure it.) <br />Fasten buttons to the visquine and tie off to the stakes <br />using a minimum 250 Ib tensil strength twine with these <br />points in mind: (See Figure 10A.) <br /> <br />1. Fasten button at least 1 foot from the edge of the plastic. <br /> <br />2. Fasten buttons to both layers of plastic. <br /> <br />3. Fasten buttons directly below stakes (one button per <br />stake ). <br /> <br />4. Tie twine Iowan stake for strength and to prevent a <br />tripping hazard. <br /> <br />13 <br />