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wildlife and nature preserves, game farms, fish hatcheries, shooting preserves, <br /> target ranges, trap and skeet ranges, hunting and fishing areas, hiking and <br /> horseback riding trails. <br /> (4) Uses or structures accessory to open space uses. <br /> (5) Extraction of sand, gravel and/or other materials. <br /> (6) Marinas, boat rentals, docks, piers, wharves. <br /> (7) Railroads, street, bridges, pipelines and other water related uses, such as cul- <br /> verts and river crossings of tranmission lines and any uses subject to regulations <br /> pursuant to Chapter 30, Wisconsin Statutes. <br /> (d) STANDARDS FOR DEVELOPMENTS IN FLOODWAY AREAS <br /> (1) All of the provisions of Section 10.51 (1) shall apply hereto. <br /> (2) Structures which are accessory to permitted open space uses may be permitted, pro- <br /> viding the structures: <br /> a. Are not designed for human habitation; <br /> b. Have a low flood damage potential; <br /> c. Are to be constructed and placed on the building site so as to offer minimum ob- <br /> struction to the flow of flood waters. Whenever possible, structures will be con- <br /> structed with the longitudinal axis parallel to the direction of flow of flood <br /> waters, and will be placed with their longitudinal axis approximately on the same <br /> line as those of adjoining structures; <br /> d. Are firmly anchored to prevent them from floating away and restricting bridge <br /> openings or other restricted sections of the stream or river; and <br /> e. Have all service facilities, such as electrial and heating equipment at or above. <br /> the flood protection elevation for the particular area. <br /> (3) Uses permitted by the Department of Natural Resources pursuant to Chapters 30 and <br /> 31, Wis. Stats. , provided that the necessary permits are obtained and amendments <br /> approved by the County to the official floodway lines, water surface profiles, flood <br /> plain zoning maps and flood plain zoning ordinance. <br /> (4) Public utilities, streets and bridges provided that: <br /> a. Adequate flood proofing measures are provided to the flood protection elevation; <br /> b. Construction shall not cause any increase of 0.1 foot or greater in the height of <br /> the regional flood, except that reasonable increases up to 1.0 foot may be approved <br /> if the amendment procedures and all conditions of Section 10.57 (b) are met; and <br /> c. The County amends its water surface profiles, flood plain zoning maps and flood <br /> plain zoning ordinances to reflect any changes resulting from such construction. <br /> (5) Fills or deposition of materials may be permitted provided that: <br /> a. The provisions of Section 10.51 (:1) (1) are met; <br /> b. Fill or deposition of materials does not encroach on the channel area between the <br /> ordinary high water mark on each bank of the stream unless a permit has been granted <br /> by the Department of Natural Resources pursuant to Chapter 30, Wis. Stats. , and a <br /> permit pursuant to Section 404 of the Federal Water Pollution Control Act, Amend- <br /> ments of 1972, 33 U.S.C. 1334 has been issued, if applicable, and the other require- <br /> ments of this Section are met; and <br /> c. The fill or other materials will be protected against erosion by rip-rap, vegeta- <br /> tive cover, sheet piling and/or bulkheading sufficient to prevent erosion and <br /> leachate. <br /> SECTION 10.53 REGIONAL FLOOD FRINGE DISTRICT (FF) <br /> (a) APPLICABILITY: The provisions of this Section shall apply to all areas within the Re- <br /> gional Flood Fringe District, as shown on the official flood plain zoning maps, and to <br /> - 53 - <br />