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<br />FLOOD FIGHTING METHODS 2003 <br /> <br />6.3A <br />Page 38 <br /> <br />The sack ring should be large enough to encompass the <br />area immediately surrounding the discharge point (3 to 4 <br />feet diameter). If several boils carrying material are found, <br />a single large sack ring may be constructed around the <br />entire "nest" of boils. <br /> <br />Riverside <br /> <br /> <br />Figure 8A <br />NEVER completely stop the flow from a <br />boil. This may cause the boil to "break <br />out" in an adjacent area. ALWAYS control <br />the boil to a point where it ceases to carry <br />material and the water runs clear. <br /> <br />9 <br />