April Dane County Code of Ordinances

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Chapter 17 uses within the floodplain will be totally free from proposed development will not increase the height of flooding and associated flood damages. Nor does this the regional flood more than 1.0 foot for the affected ordinance create liability on the part of,or a cause of hydraulic reach of the stream unless a waiver is action against,the county or any officer or employee secured from FEMA for the 1.0 foot maximum thereof for any flood damage that may result from increase.15 reliance on this ordinance or on the acts of any county (3) The zoning administrator shall deny permits official or employee charged with enforcement of this where it is determined the proposed development will ordinance. cause an obstruction to flow or increase in regional flood height of 0.01 foot or greater. 17.20 SEVERABILITY. Should any portion of this ordinance be declared unconstitutional or invalid by a 17.26 WATERCOURSE ALTERATIONS. Prior court of competent jurisdiction,the remainder of this to any alteration or relocation of a watercourse,and ordinance shall not be affected. prior to the issuance of any land use permit which may be required for the alteration or relocation of a 17.21 ANNEXED AREAS FOR CITIES AND watercourse,the county zoning administrator shall VILLAGES. The Dane County floodplain zoning notify,in writing,the municipality or municipalities provisions in effect on the date of annexation shall in which the watercourse is located,the appropriate remain in effect and shall be enforced by the district office of the department of natural resources annexing municipality for all areas annexed by the and the appropriate office of FEMA and shall require annexing municipality until the annexing the applicant to secure all necessary state and federal municipality adopts and enforces an ordinance which permits. The flood carrying capacity within the meets the requirements of ch. NR 116,Wis.Adm. altered or relocated portion of any watercourse shall Code. Annexed lands shall be described on the be maintained. municipality's official zoning map. County floodplain zoning provisions are incorporated by 17.27 CHAPTERS 30 AND 31, WIS. STATS., reference for the purpose of administering this section OTHER DEVELOPMENT. Development which and shall be kept on file in the office of the county requires a permit from the department of natural zoning administrator. resources,under chs. 30 and.31, Stats., such as docks, piers, wharves, bridges, culverts, dams and [17.22-17.24 reserved for future use.] navigational aids, may be allowed provided the necessary local permits are obtained and necessary SUBCHAPTER II amendments to the official floodway lines, water GENERAL STANDARDS APPLICABLE TO surface profiles,floodplain zoning maps or floodplain ALL FLOODPLAIN DISTRICTS zoning ordinance are made according to ss. 17.71 and 17.72. 17.25 HYDRAULIC AND HYDROLOGIC ANALYSES. (1) No development,except as [17.28-17.30 reserved for future use.] • provided in sub.(2)below,shall be allowed in floodplain areas which will: SUBCHAPTER III • (a) Cause an obstruction to flow;14 or FLOODWAY(FW)AND FLOODFRINGE(1 J) (b), Cause an increase in regional flood DISTRICTS height due to floodplain storage area lost,which is equal to or exceeding 0.01 foot. (2) Obstructions or increases equal to or greater 17.31 APPLICABILITY. The provisions of this than 0.01 foot may only be permitted if amendments section apply to all areas mapped as floodway on the are made to this ordinance,the official floodplain official floodplain zoning maps and to those portions zoning maps,including floodway lines and water of the general floodplain district determined to be surface profiles,in accordance with ss. 17.71 and floodway according to the procedures in s. 17.44. 17.72,and only if the total cumulative effect of the 14See s. 17.05(41)for the defmition. 15Annotation: Rev.July 1991. Page 83 Revised 4-30-97