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

For May 4, 2010 BOS HearingTHIS THE CLERK OF THE BOARD FORMAT!!!flood peak discharge of is 100 cfs or greater, or those areas, that are subject to sheet floodingexcept when the maximum potential contributing watershed area is less than 20 acres, thoseareas identified on subdivision plats or development plans, those areas designated by FEMA,including areas designated as Shaded Zone X as well as those areas that the Chief Engineer,using the best available data, has determined is subject to flood hazards during the base flood.(Ord. 2010 FC-1; Ord. 2005 FC-2 § 2 (part), 2005; Ord. 1999 FC-1 § 1 (part), 1999; Ord. 1988FC-2 Art. 4 (part), 1988)16.08.610Retention system."Retention system" means a type of flood control system that stops the downstream progress offlood waters by employing methods of total containment. (Ord. 2005 FC-2 § 2 (part), 2005; Ord.1999 FC-1 § 1 (part), 1999; Ord. 1988 FC2 Art. 4 (part), 1988)16.08.620Riparian habitat."Riparian habitat," for purposes of this title, means riparian habitat designated as riparian onmaps adopted by the Board. These habitats are generally characterized by vegetation that isdifferent in plant species composition or an increase in the size and/or density of vegetation ascompared to upland areas occurring in association with any regulatory floodplain and streamchannel where waters flow at least periodically in a channel or as dispersed flow, or otherfeatures associated with a floodplain such as a spring, cienega, lake, watercourse, river, stream,creek, wash, arroyo, or other surface body of water. (Ord. 2005 FC-2 § 2 (part), 2005)16.08.630Setback."Setback" means the minimum horizontal distance between a structure and a watercourse. Oneach side of a watercourse, the setback is measured from the top edge of the highest channelbank, the top edge of the closest channel or braid when multiple channels or braids exist, or theedge of the regulatory floodway,floodplain, based upon the water-surface elevation of the baseflood, whichever is closer to the channel centerlinemost representative of the erosion hazard.(Ord. 2010 FC-1; Ord. 2005 FC-2 § 2 (part), 2005; Ord. 1999 FC-1 § 1 (part), 1999; Ord. 1988FC-2 Art. 4 (part), 1988)16.08.640Sheet flooding area."Sheet flooding area" is anmeans the area which may be subject to flooding with depths of onehalffoot or less greater during the regulatorybase flood, even though a clearly defined channeldoes not exist and the path of the flooding is often unpredictable and indeterminate. Sheetflooding areas includes:A. FEMA designated Shaded Zone X, when the designation refers to areas if subject to a depthof flow of 1 foot or less during the base floodequal to or more than 6 inches during the regulatoryflow; andB. Areas that the Chief Engineer, using the best available data, has determined may be aresubject to sheet flooding during the regulatory base flood. (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)21