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CHAPTER 2- CWCS PRINCIPLES SECTION 2- ewcs PROPOSED OPERATING PRINCIPLES COLORADO FLOODPLAIN AND STORMWATER CRITERIAMANUAL HYDROLOGY CRITERIA PRESENTED IN THE STATEWIDE MANUAL OR BY USING OTHER TECHNICALLY ACCEPTABLE METHODS AS APPROVED BY THE CWCS AND/OR FEMA. 2.8 FLOODPLAIN DEVELOPMENT PRACTICES The purposes of floodplain development management practices are to provide guidelines, conditions, and restrictions for developments in the floodplain areas while protecting the public health, safety, welfare, and property from flood danger and damage, Floodplain management program elements may include, but are not limited to, floodplain management regulations, structural and non-structural flood mitigation measures, flood warning systems, emergency response procedures, operations and maintenance, flood insurance, and pUblic education. To provide impetus for proper floodplain management, the United States government, acting through the FEMA National Flood Insurance Program (NFIP), has established regulations for development in floodplain areas, Working closely together with the participating local communities and the CWCB, the NFIP program helps reduce future flood losses by regulating developments .in the 100-year floodplains and by providing flood insurance coverage, National flood insurance coverage is available to property owners and occupants of insurable properties in the communities participating in the NFIP. Flood insurance is required for federal or federally insured loans for building structures located within the FEMA Special Flood Hazard Areas (SFHA). Compliance with the NFIP regulations allows property owners to obtain lower cost flood insurance premiums. Therefore, there are substantial amount of benefits to local communities for remaining in compliance with the NFIP's reguiations. PROPOSED OPERATING PRINCIPLE AREAS THAT ARE SUBJECT TO FLOODING FROM A 100-YEAR STORM EVENT SHOULD BE REGULATED BY COMMUNITIES THROUGH APPROPRIATE FLOODPLAIN MANAGEMENT PRACTICES. THE CWCB RECOMMENDS THAT COMMUNITIES ADOPT AND ENFORCE THE FLOODPLAIN MANAGEMENT CRITERIA PRESENTED IN THE STATEWIDE MANUAL. COMMUNITIES ARE ENCOURAGED TO ADOPT AND ENFORCE FLOODPLAIN MANAGEMENT REGULATIONS, AT THEIR OWN DISCRETION, THAT ARE MORE RESTRICTIVE THAN THOSE PRESENTED IN THE STATEWIDE MANUAL AND THOSE REQUIRED BY FEMA. IT IS RECOMMENDED THAT COMMUNITIES CONSIDER THE SOO-YEAR FLOODPLAIN AS CRITERIA FOR DEVELOPMENT OF CRITICAL FACILITIES. 2.9 FLOOD CONVEYANCE IN IRRIGATION DITCHES AND CANALS There are a number of active, semi-active, or abandoned irrigation ditches and canals within the State of Colorado. These irrigation facilities were originally designed with flat slopes and limited flow conveyance capacities to mainly convey irrigation water to farmers, settlers, and other users. Because the canals and ditches were usually designed to traverse watersheds, many of these facilities have historically intercepted storm runoffs from the upstream rural and agricultural type basins. MARCH 2004 - Draft CWCS PROPOSED OPERATING PRINCIPLES CH2-206