Resolution 2025-075 – Resolution Setting as Public Hearing to Consider Adoption of an Updated Floodplain Management Ordinance for the City of Tiffin, Iowa.

homes are to be affixed (including at a minimum, the installation of utilities, the construction of streets, and either final site grading or the pouring of concrete pads) is completed before the effective date of the first floodplain management regulations adopted by the community. 9. “Expansion of existing factory-built home park or subdivision” means the preparation of additional sites by the construction of facilities for servicing the lots on which the factory-built homes are to be affixed (including at a minimum, the installation of utilities, the construction of streets, and either final site grading or the pouring of concrete pads). 10. “Factory-built home” means any structure, designed for residential use which is wholly or in substantial part, made, fabricated, formed or assembled in manufacturing facilities for installation or assembly and installation, on a building site. For purposes of this chapter, factory- built homes include mobile homes, manufactured homes, and modular homes; and also includes recreational vehicles which are placed on a site for greater than 180 consecutive days and not fully licensed for and ready for highway use. 11. “Factory-built home park or subdivision” means a parcel or contiguous parcels of land divided into two or more factory-built home lots for sale or lease. 12. “Five Hundred (500) year flood” means a flood, the magnitude of which has a two-tenths percent chance of being equaled or exceeded in any given year or which, on average, will be equaled or exceeded at least once every 500 years. 13. “Flood” means a general and temporary condition of partial or complete inundation of normally dry land areas resulting from the overflow of streams or rivers or from the unusual and rapid runoff of surface waters from any source. 14. “Flood Insurance Rate Map” (FIRM) means the official map prepared as part of (but published separately from) the Flood Insurance Study which delineates both the flood hazard areas and the risk premium zones applicable to the community. 15. “Flood Insurance Study” (FIS) means a report published by FEMA for a community issued along with the community’s Flood Insurance Rate Map(s). The study contains such background data as the base flood discharge and water surface elevations that were used to prepare the FIRM. 16. “Floodplain” means any land area susceptible to being inundated by water as a result of a flood. 17. “Floodplain management” means an overall program of corrective and preventive measures for reducing flood damages and promoting the wise use of floodplains, including (but not limited to) emergency preparedness plans, flood control works, floodproofing and floodplain management regulations. 18. “Floodproofing” means any combination of structural and nonstructural additions, changes, or adjustments to structures, including utility and sanitary facilities, which will reduce or eliminate flood damage to such structures. 19. “Floodway” means the channel of a river or stream and those portions of the floodplains adjoining the channel, which are reasonably required to carry and discharge flood waters or flood flows so that confinement of flood flows to the floodway area will not cumulatively increase the water surface elevation of the base flood by more than one foot. 20. “Floodway fringe” means those portions of the Special Flood Hazard Area outside the floodway. 21. “Highest adjacent grade” means the highest natural elevation of the ground surface prior to construction next to the proposed walls of a structure. cty_hr_d_160.doc -2- 4/15/2021