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. Hvdraulic Analvsis The hydraulic analysis for the preparation of the existing FHBM likely consisted of interpretation of USGS quadrangle mapping by HUD's engineering consultant, along with telephone discussions with local officials. The telephone discussions addressed any historic flood problems that may have occurred in Kit Carson. The FIA did perform and did not have the benefit of any detailed hydrologic and hydraulic analyses for the preparation of the FHBM. Future hydraulic analyses, submitted by developers or development proponents, for determining I DO-year water surface elevations for approximate floodplains may be computed using FEMA's Quick-2 computer program, the Corps of Engineers' HEC-2 computer program, or other acceptable hydraulic methods. Floodplain Mappinl!: The official floodplain information for the Town of Kit Carson is the Flood Hazard Boundary Map (FHBM), dated December 13, 1974. The FHBM was originally prepared by the Federal Insurance Administration (FIA). The FHBM is the only available floodplain mapping for the Town of Kit Carson at this time. Based on CWCB field observations, conversations with the Town of Kit Carson, and information about the 1965 flooding on Wild Horse Creek, there are concerns that the FHBM does not accurately depict the potential floodplain for the Town. . The CWCB has prepared a revised floodplain map that shows an approximate I DO-year floodplain area that seems to be more reasonable based on existing local topography, hydraulic structures, and channel conditions. The revised floodplain map, which is presented in the Appendix, shows both the existing FEMA floodplain and the proposed CWCB floodplain. It is important to note that the CWCB's proposed floodplain delineation is preliminary, and should not be construed as a new official floodplain map for the community. The proposed map would have to be verified by performing an approximate floodplain study, and would have to be accepted by community officials and FEMA before it could become the new official map for the community. If a new official floodplain map is completed for the Town of Kit Carson, then the CWCB would propose to designate and approve the new mapping, and rescind the old mapping. FLOODPLAIN MANAGEMENT Local Ordinance/StatutorY Requirements Communities that manage their floodplains in Colorado do so most often through the local regulatory process. This requires a community to adopt an ordinance or regulation that 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 IOO-year floodplain. . 4