underline-strikeout version of the final draft ordinance - Pima County ...

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For May 4, 2010 BOS HearingTHIS THE CLERK OF THE BOARD FORMAT!!!the water-surface elevation more than 1 foot above the base flood elevation under normal flowconditions;2. In addition, when geologic features confine the flow of a watercourse the following additionalareas shall be considered floodway areas:a. Areas necessary to convey the base flood without increasing the water surface elevation morethan a tenth (0.1) of a foot above the base flood elevation under normal flow conditions,b. Areas of frequent inundation as defined by the 4% annual chance (25-year) flood,c. Areas with excessive flow depths and velocities (dv 2 ), as defined in 16.26.050.G, andd. Active flow paths and channels based on the presence of unconsolidated alluvium related tofluvial processes and the potential for the flow paths to meander over time.3. A watercourse can be considered confined when the ratio of the wetted top-widths of thefloodplains associated with the base flood and the 25-year flood is 1.25 or less and the height ofthe geologic features are at least 1.5 times the hydraulic depth of the base flood. The watercourseshall be considered confined through all reaches where this criteria is present both upstream anddownstream of the subject area.C. ForThe primary channel of all regulatory minor watercourses with a 100-yearbase flood peakdischarge of less than 2,000 cfs, the floodway shall be at a minimum the primary channel;.D. For floodplain widths greater than 200 feet or for bifurcated watercourses, the floodway willbe determined by using the standards established by ADWR. (See Exhibit 16.08.310 at the endof this chapter.) (Ord. 2010 FC-1; Ord. 2005 FC-2 § 2 (part), 2005; Ord. 1999 FC-1 § 1 (part),1999; Ord. 1998 FC-1 Section 1, 1998; Ord. 1988 FC-2 Art. 4 (part), 1988)16.08.3760Floodway fringe area."Floodway fringe area" is a term used by FEMA to designate the floodplain area lying outsidethe floodway, but within the regulatory floodplain and below the base flood elevation. For thepurposes of this title, the floodway fringe area shall also include is also the regulatory floodplainwhernever a floodway has not been defined for a regulatory watercourse. (Ord. 2010 FC-1; Ord.2005 FC-2 § 2 (part), 2005; Ord. 1999 FC-1 § 1 (part), 1999; Ord. 1988 FC-2 Art. 4 (part), 1988)16.08.3870Geologic floodplain."Geologic floodplain" means those lands adjacent to a watercourse that have been subject tofluvial processes during the Holocene epoch (i.e., approximately the past 10,000 years). Thegeologic floodplain may be different from the regulatory floodplain. (Ord. 2010 FC-1; Ord. 1999FC-1 § 1 (part), 1999; Ord. 1988 FC-2 Art. 4 (part), 1988)16.08.3980Habitat mitigation."Habitat mitigation" for purposes of Chapter 16.30 of the Pima County Code, means providing anew riparian habitat of similar quality to that which was removed as a result of physicalimprovements or development to a piece of property located within floodplain, an erosion hazardarea, or riparian habitat regulated by this ordinance. (Ord. 2005 FC-2 § 2 (part), 2005)16.08.40390Hardship.16
For May 4, 2010 BOS HearingTHIS THE CLERK OF THE BOARD FORMAT!!!Hardship means, for the purposes of approving variances of regulation under the NFIP, theexceptional hardship which would result from a failure to grant the requested variance. Thegoverning body requires that the variance be exceptional, unusual and peculiar to the propertyinvolved. Mere economic or financial hardship alone is not exceptional. Inconvenience, aestheticconsiderations, physical disabilities, personal preferences or the disapproval of one's neighborslikewise cannot, as a rule, qualify as an exceptional hardship. All of these problems can beresolved through other means without granting a variance, even if the alternative is moreexpensive, or requires the property owner to build elsewhere or put the parcel to a different usethan originally intended. (Ord. 2005 FC-2 § 2 (part), 2005)16.08.4100Highest adjacent grade."Highest adjacent grade" means the highest natural elevation of the ground surface prior toconstruction next to the proposed walls of a structure. (Ord. 2005-FC2 § 2 (part), 2005)16.08.4210Historic structure."Historic structure" means a building:A. Listed individually in the National Register of Historic Places (a listing maintained by theDepartment of Interior) or preliminarily determined by the Secretary of the Interior (Secretary)as meeting the requirements for individual listing on the National Register;B. Certified or preliminarily determined by the Secretary as contributing to the historicalsignificance of a registered historic district or a district preliminarily determined by the Secretaryto qualify as a registered historic district;C. Individually listed on a state inventory of historic places in states with historic preservationprograms which have been approved by the Secretary; orD. Individually listed on a local inventory of historic places in communities with historicpreservation programs that have been certified either by an approved state program asdetermined by the Secretary; or directly by the Secretary in states without approved programs.(Ord. 2005 FC-2 § 2 (part), 2005)16.08.4320Hydroriparian."Hydroriparian" for purposes of this title, means riparian habitat designated as hydroriparian onmaps adopted by the Board. These riparian habitats are generally associated with perennialwatercourses and/or springs. Plant communities are dominated by obligate or preferentialwetland plant species such as willow and cottonwood. (Ord. 2005 FC-2 § 2 (part), 2005)16.08.4430Important Riparian Area."Important Riparian Area," for purposes of this title, means riparian areas designated asImportant Riparian Areas on maps adopted by the Board for their hydrologic, geomorphic, andbiological values. These areas provide a critical function for landscape linkage and connectivitywith other habitats and provide biological corridors. Important Riparian Areas includehydroriparian, mesoriparian, and xeroriparian class A, B, C, and D habitat areas. (Ord. 2005 FC-17
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