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

For May 4, 2010 BOS HearingTHIS THE CLERK OF THE BOARD FORMAT!!!Chapter 16.16FLOODPLAIN MAPS AND BOUNDARIESSections:16.16.010 Boundaries shown on maps.16.16.020 Studies and maps adopted by reference.16.16.030 Areas subject to revision.16.16.040 Engineering studies and map preparation.16.16.050 Undelineated areas - Landowner responsibility.16.16.060 Floodplains - Basic delineation of areas.16.16.070 Floodplains - New delineations required when.16.16.080 Boundary determination questions.16.16.010Boundaries shown on maps.The boundaries of the regulatory floodplains and the floodways for which adequate hydrologicand hydraulic data are available for their delineation on maps shall be shown on mapsmaintained by the Chief Engineer. (Ord. 2005 FC-2 § 2 (part), 2005; Ord. 1999 FC-1 § 1 (part),1999; Ord. 1988 FC-2 Art. 6 (A) (part), 1988)16.16.020Studies and maps adopted by reference.A. The federal government through the NFIP has identified certain flood hazard areas in anengineering report entitled, "The Flood Insurance Study for the Unincorporated Areas of PimaCounty, Arizona," dated February 15, 1983, with accompanying FIRMs and flood boundary andfloodway maps., This flood insurance study includes its accompanying maps along with allsubsequent amendments and revisions by the federal government to the flood insurance study,including all new flood insurance studies, FIRMs, and flood hazard boundary maps adoptedunder the NFIP for the unincorporated areas and incorporated cities within the County, all ofwhich are hereby incorporated by reference and declared to be a part of this title.B. The delineations of the regulatory floodplains and the floodways shown on these maps shallbe the regulatory floodplains and floodways governed by this title for those watercourses studied.The flood insurance study and the accompanying maps are on file in the offices of the District.Amendments and revisions to the flood insurance study and its accompanying maps shall beincorporated in the floodplain maps maintained by the Chief Engineer. (Ord. 2005 FC-2 § 2(part), 2005; Ord. 1999 FC-1 § 1 (part), 1999; Ord. 1988 FC-2 Art. 6 (A) (1), 1988)16.16.030Areas subject to revision.Due to the episodic nature of natural flood events and the resulting changes to hydrologic andhydraulic conditions along the watercourses within the County, base flood peak discharges, flowvolumes, and associated regulatory floodplain and erosion hazard areas are subject to continuousrevision. At a minimum, base flood values and base flood elevations will meet or exceed thecurrent values established by the NFIP and reflect historic flood information and general,current, watershed conditions. When flood events occur that alter floodplain and erosion hazard29