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DANE COUNTY CODE 11 - 2 shoreland areas shall be permitted as conditions. This provision shall not apply to follows: a building on a lot which is within soil conservation practices such as terraces, 100 feet of an existing building or buildings runoff diversion and grassed waterways with setbacks less than 75 feet, shall have a constructed for sediment retardation. setback at least as great as the setback of either adjoining building, but in no case (h) Construction of lagoons connected to a shall the setback be less than 50 feet. navigable body of water'for the purpose of private development shall 1r- 1)rohihited. A (e)Normal high waterline shall be defined special exception permit shall be required for the purpose of this ordinance as the line before construction or dredging of any other where natural vegetation changes from artificial waterway, canal, ditch, lagoon predominantly aquatic to predominantly pond, lake or similar waterway which is terrestrial. The zoning administrator shall within 300 feet of a navigable body of water. determine the location of the normal high In passing on a special exception permit, the -- water elevation line where not established board of adjustment shall evaluate the effect by a state or county governmental agency. of the proposal on erosion and sedimentation both during construction and thereafter, (f)Removal of trees in excess of 20 percent water quality, stream flow, fish life, aquatic of the number of trees within 75 feet from the plants, and flooding, and evaluate the high water mark on a lot or parcel of land is measures proposed to prevent harmful prohibited in shoreland areas, and no changes. building permit for a building or structure .• shall be issued for property so situated where more than 20 percent of the trees have been removed since the date of adoption of FLOOD PLAIN REGULATIONS provisions; provided, however, that at the discretion of the property owner removal of dead, diseased or dying trees or Section 11.Q6 Statutory authoriza- silvicultural thinning shall be permitted. In tion, finding of fact, statement of addition removal of trees in excess of 20 purpose and title. percent may be permitted by the board of adjustment as a special exception. In passing ( 1) Slot/1/0)7/ rt fit/10 1•i;_rltion. This on a special exception permit, the board of ordinance for flood plain protection is adjustment shall, in so far as practicable, adopted pursuant to the authorization protect scenic beauty, control erosion and contained in Sections 59.97, and 87.30 of the • reduce effluent and nutrient flow from the Wisconsin Statutes. shoreland. • (2)Fi nd i nq o/',Poet. The uncontrolled use of (g) Filling and grading which would the flood plains, rivers or streams of the (� result in substantial detriment to navigable County of Dane,Wisconsin,adversely affects waters by reason of erosion, sedimentation _ the public health, safety, convenience and or impairment of fish or aquatic life is general welfare and impairs the tax base of prohibited. A special exception permit from that county. the board of adjustment shall be required in addition to permits permitted by state (3) Statement of pur pose. The purpose of agencies under the statutes for any filling or these rules is to provide a uniform basis for grading of any area which is within 300 feet the preparation, implementation and of a navigable body of water and which has administration of sound flood plain surface drainage toward the water and on i regulations for all Dane Cow't.y flood plains which there js filling or grading of more to: than 1,000 square feet of area. In passing on a special exception permit, the board of (a) Protect life, health and property; ( adjustment shall evaluate the effect of the proposal on possible water pollution (b) Minimize expenditures of public including erosion and sedimentation, monies for costly flood control projects; maintenance of safe and healthful (c) Minimize rescue and relief efforts.