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I Hvdraulic Analvsis Hydraulic information used for streams with detailed floodplain delineations in Fremont County's PIS is discussed in Section 3.2 of the PIS. In the case of approximate floodplains, the hydrology values in obtained from the use of the Guidelines or from a detailed hydrologic analysis should be used in conjunction with an appropriate hydraulic analysis. Hydraulic analyses for detennining IOO-year water surface elevations for approximate floodplains may be performed using FEMA's Quick-2 computer program, the Corps of Engineers' HEC-2 computer program, or other acceptable hydraulic methods. I 1 I FLOODPLAIN MANAGEMENT Local Ordinance Reauirements \ Communities which manage their floodplains in Colorado do so most often through the local regulatory process. This requires a community to adopt an ordinance or regulation which sets forth the performance standards by which development will occur in identified flood hazard areas. Nationwide and in Colorado, regulations are enforced within the area of the lOO-year floodplain. \ The basic requirement of these Tegulations is that new development and significant improvement of existing development cannot occur in the lOO-year floodplain without a floodplain development pennit being obtained. Obtaining such a pennit requires compliance with engineering standards. In communities like Fremont County that have detailed floodplain information, the engineering standards require that residential buildings must be elevated above the lOO-year elevation and that non-residential buildings must be either elevated or floodproofed. Other structures or projects (i.e. bridges, culverts or fill) must be constructed in a way that minimizes the potential increase in flood elevations they may cause. For those areas like Fremont County that have approximate floodplain information as well, the engineering standards have been more general. Structures must be built with materials and techniques that "minimize flood damages". The use of engineering techniques presented in this report can help the County to better regulate its appToximate floodplain areas. Flood Insurance Flood insurance is made available to owners and occupants of floodprone property through the federal government's National Flood Insurance Program (NFIP). The NFIP insurance is available to anyone in any community that participates in the NFIP. At the time of this publication, Fremont County was participating in the NFIP, and officially joined the regular program of the NFIP on SeptembeT 29, 1989. Communities become participants by adopting floodplain regulations, adopting an NFIP map (if one exists) and agreeing to cooperate with the federal government in the local implementation of the NFIP. Property owners and occupants can then contact an insurance agent familiar with the NFIP (perhaps their own agent) and purchase insurance through that agent, 5 I , , ~ t\ \'