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Some methods may be prohibited by local ordinance. Costs: Vary according to which method is used. Because the cheaper methods can cause greater pressures, consult a plumbing contractor. G. Sandbagging Sandbagging takes a lot of time and effort. It is not a preferred method when levees, gates, or flood shields are possible. Sandbagging may be appropriate if predicted flood heights will be higher than your levee or other protection. Sometimes during flood emergencies sandbags can be obtained through your city or county emergency servi ces offi ce. They can be purchased if you want to stockpile them in advance. Check your Yellow Pages under "Bags" or contact your emergency services office for names of bag companies. You will want specially made sandbags, not plastic garbage bags or some other type that will not hold up. Sandbags come in various sizes and materials. They should be l' X 2' or larger. We recommend webbed polypropelene bags - burlap will deteriorate over time. The going rate is 25~ to 40~ each. Some companies may only accept orders of 1,000 or more. Some companies may sell you the sand. The best filler is sand. Clay, sandy, or gravelly soil will also work. You will also need heavy plastic sheeting to provide for waterproofing. Here are the steps to follow: 1. For proper support your wall needs to be 2~ to 3 feet wide at the bottom for every foot of height. Select your site and strip all the sod (when the grass gets wet it will be slippery; your wall could be pushed back by the pressure of the flood waters). Number of Sandbags Required For 100 Feet of Wall Height Number Needed 1 Foot 2 Feet 3 Feet 600 1,400 2,200 NOTE: we do not recommend making a sandbag wall over 3 feet high. 2. About 1/3 back from the floodside, dig a trench 1 foot wide by 6 inches deep. This is called a bonding trench and helps to keep the wall in place. 3. Fill the sand bags 1/2 to 3/4 full. You do not need to tie them. 27