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<br />F100dwalls and Levees <br />F100dwalls and levees are free standing structures that prevent floodwaters from encroaching into <br />the protected buildings. They may completely surround the building or protect only the low side of <br />the property. Construction of floodwalls and levees may require local, state, and/or federal pennits <br />in order to protect other properties from adverse impacts, to avoid filling in wetlands, and to <br />maintain regulatory floodways. The desired aesthetics of the neighborhood should also be taken <br />into account when considering a floodwall or levee. The most important consideration is that <br />property owners who have constructed a floodwall or levee should not have a false sense of security <br />about their property protection. The protected area should always be evacuated prior to flooding. <br /> <br /> <br />Dry Flood Proofing <br />This technique involves sealing building walls with waterproofing compounds, impermeable <br />sheeting, or other materials and using shields for covering and protecting openings form <br />floodwaters. Dry flood proofing works best on structures in the flood fringe where the flows are <br />shallow with low velocities. Building walls can be protected to a height of about three feet, <br />depending on building construction. This technique is not recommended for buildings with a <br />basement or a crawl space due to underseepage problems that can occur. <br /> <br />C. NON- STRUCTURAL MITIGATION <br />A comprehensive approach to flood hazard mitigation can and should also include equally effective <br />non-structural measures such as flood insurance, emergency preparedness, public education and <br />awareness, and acquisition and relocation of structures. These measures are briefly described <br />below. There are numerous mitigation documents available, and the CWCB can provide further <br />information and assistance to interested parties. The Colorado Office of Emergency Management <br />and the Federal Emergency Management Agency have information and expertise in these areas as <br />well. <br /> <br />Flood Insurance <br />The National Flood Insurance Program (NFIP) is a federally subsidized program that is available to <br />any property owner whether or not the building is in a floodplain. Insurance is sold through a <br />private insurance agent who wants to sell it in a community who has joined the program. As of <br />August 5, 1986, Jefferson County has been participating in this program. The NFIP is based on an <br />agreement between local communities and the federal government which states that if a community <br />will implement measures to reduce future flood risks to new construction or substantial re- <br />construction, the federal government will make flood insurance available within the community as <br /> <br />6 <br />