O-2021-3849 Amending Chapter 94 "Floods" of the Code of Ordinances by adding new definitions and incorporating updated regulations related to flood hazards

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Area of future conditions flood hazard means the land area that would be inundated by the one percent annual chance (100-year) flood based on future conditions hydrology. Area of shallow flooding means a designated AO, AH, AR/AO, AR/AH, or VO zone on a community's flood insurance rate map (FIRM) with a one percent or greater annual chance of flooding to an average depth of one to three feet where a clearly defined channel does not exist, where the path of flooding is unpredictable and where velocity flow may be evident. Such flooding is characterized by ponding or sheet flow. Area of special flood hazard is the land in the floodplain within a community subject to a one percent or greater chance of flooding in any given year. The area may be designated as zone A on the flood hazard boundary map (FHBM). After detailed rate making has been completed in preparation for publication of the FIRM, zone A usually is refined into zones A, AO, AH, Al-30, AE, A99, AR, AR/Al - 30, AR/AE, AR/AO, AR/AH, AR/A, VO, V1-30, VE or V. Base flood means the flood having a one percent chance of being equaled or exceeded in any given year. Basement means any area of the building having its floor subgrade (below ground level) on all sides. Breakaway wall means a wall that is not part of the structural support of the building and is intended through its design and construction to collapse under specific lateral loading forces, without causing damage to the elevated portion of the building or supporting foundation system. Coastal AE zone means the area subject to inundation by the one -percent annual -chance flood event that is also within the area of limited to moderate wave action as shown on the community's FIRM. Critical feature means an integral and readily identifiable part of a flood protection system, without which the flood protection provided by the entire system would be compromised. Development means any manmade change to improved and unimproved real estate, including but not limited to buildings or other structures, mining, dredging, filling, grading, paving, excavation or drilling operations or storage of equipment or materials. Elevated building means, for insurance purposes, a non -basement building, which has its lowest elevated floor, raised above ground level by foundation walls, shear walls, posts, piers, pilings, or columns. Existing construction means for the purposes of determining rates, structures for which the "start of construction" commenced before the effective date of the FIRM or before January 1, 1975, for FIRMs effective before that date. "Existing construction" may also be referred to as "existing structures." Existing manufactured home park or subdivision means a manufactured home park or subdivision for which the construction of facilities for servicing the lots on which the manufactured 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 floodplain management regulations adopted by a community. Expansion to an existing manufactured home park or subdivision means the preparation of additional sites by the construction of facilities for servicing the lots on which the manufactured