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1 Chapter 17 (a) Withstand the flood pressures, depths, (2) Correction of significant discrepancies between velocities,uplift and impact forces, and other factors the water surface profiles and floodplain zoning associated with the regional flood; maps; (b) Assure protection to the flood protection (3) Any fill in the floodplain which raises the elevation; elevation of the filled area to a height at or above the (c) Provide anchorage of structures to flood protection elevation and is contiguous to land foundations to resist flotation and lateral movement; lying outside the floodplain; • (d) Insure that the structural walls and floors are (4) Any fill or encroachment into the floodplain watertight to the flood protection elevation, and the that will obstruct flow causing an increase of 0.01 interior remains completely dry during flooding, foot or more in regional flood height; without human intervention. (5) Any upgrading of floodplain zoning ordinances (3) Floodproofing measures could include: text required by s.NR 116.05, Wis. Adm. Code, or (a) Reinforcement of walls and floors to resist otherwise required by law, or for changes by the rupture or collapse caused by water pressure or county. floating debris; (b) Addition of mass or weight to structures to 17.72 PROCEDURES. (intro.) Amendments to prevent flotation; this ordinance may be made upon petition of any (c) Placement of essential utilities above the interested party according to the provisions of s. flood protection elevation; 59.97, Stats. Such petitions shall include all (d) Surface or subsurface drainage systems, necessary data required by ss. 17.44 and 17.61(2). including pumping facilities, to relieve external (1) Copies of any amendment proposed shall be foundation wall and basement floor pressures; referred to the zoning agency for a public hearing (e) Construction of water supply wells, and and recommendation to the governing body. Copies waste treatment systems to prevent the entrance of of the proposed amendment and notice of the public flood waters into the systems; hearing shall be submitted to the appropriate District (1) Cutoff valves on sewer lines or elimination office of the Department of Natural Resources for of gravity flow basement drains. review prior to the hearing. The amendment procedure shall comply with the provisions of s. 17.66 PUBLIC INFORMATION. 59.97, Stats., except that no provision of this chapter (1) Where useful, marks on bridges or buildings or shall be construed to require town board approval or other markers may be set to show the depth of allow town board veto of any such amendment. (2) No amendment to the maps or text of this ', inundation during the regional flood at appropriate O P I ? locations within the floodplain. ordinance shall become effective until reviewed and (2) All available information in the form of maps, approved by the Department. engineering data and regulations shall be readily (3) All persons petitioning for a map amendment available and should be widely distributed. which involves an obstruction to flow causing an (3) All legal descriptions of property in the increase of 0.01 foot or more in the height of the floodplain should include information relative to the regional flood shall obtain flooding easements, or floodplain zoning classification when such property . other appropriate legal arrangements, from all is transferred. adversely affected property owners and notify local [17.67- 17.70 reserved for future use.] units of government before the amendment can be approved by the governing body. ( F: SUBCHAPTER VII (4) When considering amendments to the official AMENDMENTS floodplain zoning map, in areas where no water surface profiles exist, the committee and board shall 17.71 AMENDMENTS. (intro.) GENERAL. consider data submitted by the Department, the The county board may change or supplement the zoning administrator's visual on-site inspections and boundaries of the floodplain zoning districts and the other available information. (See s. 17.12.) regulations contained in this ordinance in the manner provided by law. Actions which require an [17.73-17.80 reserved for future use.] amendment include, but are not limited to, the following (1) Any change to the official floodplain zoning map including the floodway line or boundary of any - floodplain area; Page 89