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<br />· Poly should be placed in the trench and anchored with several sandbags. A sufficient width <br />of the poly is placed on the water side of the levee. <br />· Sandbags should be stacked in alternating rows, similar to the alternating joints of a brick <br />wall. <br />· Sandbags should be stacked in a pyramidal structure using a 3 to I ratio of the base width to <br />the height. <br />· The elevation of the levee should be maintained to the desired level of protection. <br />· The poly sheeting should provide a water proof cap, once the levee has been built. <br />· Sandbags are placed to secure the poly on top of the levee. <br />· Levees should be kept at least 6 feet from foundation or basement walls. <br /> <br />Figure I depicts a typical cross-section of a properly constructed sandbag levee. <br /> <br />Straw bale dams can be constructed in streams and along properties for flood and sediment <br />control purposes. The straw bales are used to slow the velocity of water moving downslope, <br />reduce amount of runoff by allowing infiltration, and reduce amount of sediment moving <br />downslope. The straw bale placement is best accomplished by hand crews. Figure 2 presents an <br />installation guide for straw bales. <br /> <br />Flood Proofing <br />Flood proofing is defined as "any combination of structural or non-structural changes or <br />adjustments incorporated in the design, construction, or alteration of individual buildings or <br />properties that will reduce flood damages." Simply stated, flood proofing includes any effort <br />property owners may take to reduce flood damage to buildings and their contents. Flood proofing <br />can benefit the property owner by reducing future flood damages and the inconveniences due to <br />cleanup and repair. Other benefits may include less time off work, improved health and safety, and <br />other intangible benefits. There are three general classifications of floodproofed structures: I) <br />Permanent flood proofing which does not require human action to initiate, 2) Contingent flood <br />proofing which requires human action at the time of flood waming, and 3) Emergency measures <br />used and initiated at the time of flooding. Some of the most common types of flood proofing <br />practices are described below. <br /> <br />Elevation <br />Elevation of a building involves raising a building in place so that the lowest floor is above the <br />flood level for which protection is being provided. Buildings can be elevated on several different <br />types of foundations including raised foundation walls or an open foundation on piers, posts, or <br />piles. Buildings may also be elevated by filling the property to raise the ground elevation on which <br />the structure sits. An excellent example of elevaf n is work that's been done to the Buffalo Creek <br />community center. <br /> <br /> <br />D <br /> <br />3 <br />