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Chapter 12-18: FLOODPLAIN MANAGEMENT - Mason City, Iowa

Chapter 12-18: FLOODPLAIN MANAGEMENT - Mason City, Iowa

Chapter 12-18: FLOODPLAIN MANAGEMENT - Mason City, Iowa

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SUBSTANTIAL IMPROVEMENT: Any improvement to a structure which satisfies either of thefollowing criteria:A. Any repair, reconstruction, or improvement of a structure, the cost of which equals orexceeds fifty (50) percent of the market value of the structure either: 1) before the “startof construction” of the improvement, or 2) if the structure has been “substantiallydamaged” and is being restored, before the damage occurred. The term includesstructures which have incurred “repetitive loss” or “substantial damage,” regardless ofthe actual repair work performed. This term does not, however, include any project forimprovement of a structure to comply with existing state or local health, sanitary, orsafety code specifications which are solely necessary to assure safe conditions for theexisting use. This term also does not include any alteration of a “historic structure”,provided the alteration will not preclude the structure’s designation as a “historicstructure”.B. Any addition which increases the original floor area of a building by twenty-five (25)percent or more. The floor area of all additions constructed after March 16, 1995 May16, 20<strong>12</strong>, shall be added to any proposed addition in determining whether the totalincrease in original floor space would exceed twenty-five (25) percent.VARIANCE: grant of relief by a community from the terms of the floodplain managementregulations.VIOLATION: The failure of a structure or other development to be fully compliant with thecommunity’s floodplain management regulations.<strong>12</strong>-<strong>18</strong>-3 Lands to Which This <strong>Chapter</strong> AppliesThe provisions of this <strong>Chapter</strong> shall apply to all lands within the jurisdiction of <strong>Mason</strong> <strong>City</strong> shownon the official floodplain zoning map as being within the boundaries of the floodway, floodwayfringe, general floodplain and shallow flooding (overlay) districts, as established in <strong>Chapter</strong> <strong>12</strong>-<strong>18</strong>-4.<strong>12</strong>-<strong>18</strong>-4 Establishment of Official Floodplain Zoning MapThe flood insurance rate maps (FIRM) prepared as part of the flood insurance study for CerroGordo County and Incorporated Areas, <strong>City</strong> of <strong>Mason</strong> <strong>City</strong>, Panels 19033C0142C, 0144C,0161C, 0162C, 0163C, 0164C, 0167C, 0168C, 0169C, 0<strong>18</strong>8C, 0251C, 0252C, dated May 16,20<strong>12</strong> <strong>Mason</strong> <strong>City</strong>, dated March 16, 1995, and those panels of the flood insurance rate map forCerro Gordo County, dated December 1, 2001, that include those portions of Cerro GordoCounty annexed by <strong>Mason</strong> <strong>City</strong> after March 16, 1995, are hereby adopted by reference anddeclared to be the official floodplain zoning map. The flood profiles and all explanatory materialcontained with the flood insurance study are also declared to be a part of this <strong>Chapter</strong>.<strong>12</strong>-<strong>18</strong>-5 Rules for Interpretation of District BoundariesThe boundaries of the zoning district areas shall be determined by scaling distances on theofficial floodplain zoning map. When an interpretation is needed as to the exact location of aboundary, the Administrative Officer shall make the necessary interpretation. The Zoning Boardof Adjustment, hereinafter referred to as the Board, shall hear and decide appeals when it is

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