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SECTION 10.31; 10.32._. (13) Regional:Flood: :. The regional flood is a flood determined by. the Division of Environmental Protection which is representative of large floods known to have occurred generally in Wisconsin and reasonably characteristic of what can be ex- pected to occur on a particular stream. The regional flood generally has an average frequency in the order of the one hundred (100) year recurrence interval flood determined from an analysis of floods on a particular stream and other streams in the same 'general region. (14) Standard Project:Flo(d: A hypothetical flood, estimated by the Corps of En- gineers, representing the critical flood runoff volume and peak discharge that may be expected from the most severe combination of meterological and hydrologic. conditions that are considered reasonably characteristic of the geographical region involved, excluding extremely rare combinations. (15) , Storage Capacity of a Flood Plain: The volume of space above an area of flood plain land that can be occupied by floodwater of a given stage at a given time, of whether the water is moving. (16) Structure: Anything constructed or erected`, the use of which requires a more or less permanent location on or in the. ground. Includes but is not limited to objects such as buildings, . factories, sheds,' and. cabins. .- a. Permanent Structure: . A structure which is built of such materials and in such a way that it would commonly be expected to last and remain useful for a substantial period" of time. _ b. Temporary Structure: A structure which is built of such materials and in such a way that it would commonly be expected to have a relatively short useful life, or is built for a purpose that. would commonly be expected to be rela- _ tively short-term. 10.32 GENERAL PROVISIONS . (a) Jurisdiction: The jurisdiction of this Section includes all lands, adjacent to each navigable reach of river or stream within the boundaries of Dane County, Wis- consin,that would be inundated by the regional flood. (b) District Boundaries: The boundaries of the general flood plain district shall be as they appear on the Zoning District Maps on file in the office of the Dane County. Zoning Supervisor. (1) The Flood plain District boundary shall be, subject to the provisions of 10.03 of the Zoning Ordinance. (2) Compliance with the provisions of this, Section shall not be grounds for the. removal of lands from the flood plain district unless such lands are filled to a height of at least two feet above the elevation of the standard project flood for the particular area and are contiguous to other lands lying outside the flood plain district.' ('c) Effect of Flood Plain District Regulations: The regulations set forth in this Section for the flood plain district shall apply only to the flood plains mapped on the official zoning map and shall be void and of no effect in areas not mapped as being included in the flood plain districts.. The regulations of this Section shall be construed as being supplementary to the regulations imposed 'on the same lands by an underlying zoning When flood plain and underlying zoning ordi- nance regulations conflict with one another, the most restrictive combination of such regulations shall govern. (d) Compliance: .No.structure, land or water, shall hereafter be used and no structure shall be located, extended, converted or structurally .altered without full compliance with the terms' of this Section and other applicable regulations. - 37