Ordinance 2012-1625 - Laserfiche WebLink

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flood control works and floodplain management regulations. Floodplain management regulations are zoning ordinances, subdivision regulations, building codes, health regulations, special purpose ordinances (such as floodplain ordinance, grading ordinance, and erosion control ordinance) and other applications of police power. The term describes such state or local regulations, in any combination thereof, which provide standards for the purpose of flood damage prevention and reduction. Floodproofing means a combination of structural and/or non-structural provisions, additions, changes, or adjustments to properties and structures subject to flooding which reduce or eliminate flood damages to properties, water and sanitary facilities, structures, and contents of buildings in a flood hazard area. Floodway (regulatory floodway) is the channel of a river or other watercourse and adjacent land areas that must be reserved in order to discharge the base flood without cumulatively increasing the water surface elevation more than a designated height. The Colorado statewide standard for the designated height to be used for all newly studied reaches shall be one-half foot (six inches). Letters of Map Revision to existing floodway delineations may continue to use the floodway criteria in place at the time of the existing floodway delineation. 100 year flood is a flood having a recurrence interval that has a one-percent chance of being equaled or exceeded during any given year (I-percent-annual-chance flood). The terms "one- hundred-year flood" and "one-percent-chance flood" are synonymous with the term "I00-year flood." The term does not imply that the flood will necessarily happen once every one hundred years. 100-year floodplain is the area of land susceptible to being inundated as a result of the occurrence of a one-hundred-year flood. 500 year flood is a flood having a recurrence interval that has a 0.2-percent chance of being equaled or exceeded during any given year (0.2-percent-chance-annual-flood). The term does not imply that the flood will necessarily happen once every five hundred years. 500-year floodplain is the area of land susceptible to being inundated as a result of the occurrence of a 500-year flood. Freeboard is the vertical distance in feet above a predicted water surface elevation intended to provide a margin of safety to compensate for unknown factors that could contribute to flood heights greater than the height calculated for a selected size flood such as debris blockage of bridge openings and the increased runoff due to urbanization of the watershed. Functionally dependent use is a use which cannot perform its intended purpose unless it is located or carried out in close proximity to water. The term includes only docking facilities, port facilities that are necessary for the loading and unloading of cargo passengers, and ship building and ship repair facilities, but does not include long-term storage or related manufacturing facilities. Ordinance No.1625,Series 2012 Page 6 of 31 6