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3. On interior lots abutting on two streets, or corner lots abutting on three <br /> streets, no accessory building shall be erected, moved or added to so as to be <br /> nearer the rear street than the setback for such street. This provision shall <br /> not apply to alleys. <br /> 4. On corner lots abutting on two streets no accessory building shall be erected, <br /> moved or added to so as to be nearer to the side street than the distance re- <br /> quired for the main building on such street; provided, however, that for garages <br /> with entrances facing the side street the minimum distance from such side street <br /> shall be twenty (20) feet. When the rear lot line of the corner lot forms the <br /> side line of a adjoining or abutting lot no accessory building shall be erected, <br /> moved or added to so as to be nearer such rear lot line than the side line re- <br /> quired for the building on the adjoining lot. <br /> (b) Permitted obstructions in a required rear yard. <br /> 1. Steps or stoops to provide access to a building that is not more than <br /> three (3) feet above ground level and do not extend more than four (4) <br /> feet into a required rear yard. <br /> 2. One story bay windows projecting three (3) feet or less into the yard <br /> provided that such windows do not occupy, in the aggregate, more than <br /> one-third (1/3) of the front wall of the building. <br /> (6a) PROVISIONS APPLICABLE TO ALL YARDS <br /> (a) No existing building, erected prior to the adoption of this ordinance, which projects <br /> into a required yard shall be moved, structurally altered or added to so as to increase <br /> that part of the building projections into the required yard. This provision shall not <br /> be construed to prohibit additions or alterations which conform to the setback require- <br /> ments. .. <br /> (b) Roof overhangs, soffits and awnings that are not supported to the ground may extend <br /> into any required yard by not more than three (3) feet. <br /> (7) SHORELAND AREA PROVISIONS <br /> (a) Shoreland areas shall include all lands in the unincorporated areas of Dane County <br /> which are one thousand (1,000) feet from the normal high water line of lakes, <br /> ponds or flowages listed in "Surface Water Resources of the Dane County" published <br /> by the Wisconsin Conservation Commission, 1961, and all lands which are three hun- <br /> dred feet from the normal high water line or to the landward side of a flood plain <br /> of the navigable reaches of rivers and streams. <br /> (b) Lot area, width and density requisites for lots located in shoreland areas shall <br /> not be less than those required in Section 10.05 (4) and (5) R-1 Residence District, <br /> Section 10.16 (3) General Provisions and Exceptions. <br /> (c) Setbacks from water in shoreland areas for all buildings and structures, except <br /> piers, hoist, boathouses and similar uses shall be not less than seventy-five <br /> (75) feet measured horizontally, and not less than two (2) feet measured verti- <br /> cally from a normal high water line unless otherwise specified by the County flood <br /> plain zoning ordinance provisions. <br /> (d) Exceptions to setbacks fromwater in shoreland areas shall be permitted as follows: <br /> A building on a lot which is within one-hundred (100) feet of an existing building <br /> or buildings with setbacks less than 75 feet, shall have a setback at least as <br /> great as the setback of either adjoining building, but in no case shall the set- <br /> back be less than fifty (50) feet. <br /> (e) Normal high water line shall be defined for the purpose of this ordinance as the <br /> line where natural vegetation changes from predominantly aquatic to predominantly <br /> terrestrial. The Zoning Administrator shall determine the location of the normal <br /> high water elevation line where not established by a state or county governmental <br /> agency. <br /> (f) Removal of trees in excess of twenty (20) percent of the number of trees within <br /> 75 feet from the high water mark on a lot or parcel of land is prohibited in <br /> shoreland areas, and no building permit for a building or structure shall be issued <br /> for property so situated where more than twenty (20) percent of the trees have <br /> been removed since the date of adoption of this provision, provided, however, that <br /> at the discretion of the property owner removal of dead, diseased or dying trees, <br /> or silvicultural thinning shall be permitted. In addition removal of trees in ex- <br /> cess of twenty (20) percent may be permitted by the Board of Adjustment as a <br /> Special Exception. In passing on a Special Exception Permit, the Board of Adjust- <br /> ment shall, in so far as practicable, protect scenic beauty, control erosion and <br /> reduce effluent and nutrient flow from the shoreland. <br /> (g) Filling and grading which would result in substantial detriment to navigable waters <br /> by reason of erosion, sedimentation, or impairment of fish or aquatic life is <br /> prohibited. A special exception permit from the Board of Adjustment shall be required <br /> - 37 - <br />