Sometimes it's not enough to simply toss the bags. Sometimes we need to step into a leadership role, and, well - Build the dike.  For more indepth information and knowldege on Stepping up to the Dike, please visit http://www.winnipeg.ca/emergweb/Flood/BuildingADike.stm   . Build the Dike Dike should be at least 8 feet away from building For greater security create a trench under the sandbag dike at least one sandbag deep and two sandbags wide Height = predicted flood water rise above ground level + two feet Flood waters and sandbag weight will cause the ground to compact, allow for this with extra sandbags on top of required height Width = height + 2 feet The top of the dike must be at least 2 feet Use a 6 mil polyethylene sheet of plastic in 3 metre wide rolls weaved between the sandba... 04/05/2011