April Dane County Code of Ordinances

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Chapter 17 (3) Any fill in the floodplain which raises the 17.81 FLOOD STORAGE DISTRICT. (1) Intent elevation of the filled area to a height at or above the and purpose. The flood storage district delineates that flood protection elevation and is contiguous to land portion of the floodplain where storage Of _ -I lying outside the floodplain; floodwaters has been taken into account. The district (4) Any fill or encroachment into the floodplain provides for the protection of the storage areas and that will obstruct flow causing an increase of 0.01 assures that development in the storage areas will not foot or more in regional flood height; cause higher floodplain elevations. (5) Any upgrading of floodplain zoning ordinances (2) Criteria for establishing flood storage districts. _ text required by s. NR 116.05, Wis. Adm. Code, or A flood storage district may be established for the otherwise required by law, or for changes by the area landward of the floodway in lieu of the county. floodfringe designation where floodplain storage will 17.72 PROCEDURES. (intro.) Amendments to decrease the regional flood elevation,provided that: this ordinance may be made upon petition of any (a) The department of natural resources interested party according to the provisions of s. approves the methodology used to analyze floodplain 59.97, Stats. Such petitions shall include all storage to determine revised regional flood necessary data required by ss. 17.44 and 17.61(2). elevations. (1) Copies of any amendment proposed shall be (b) The municipality adopts required referred to the zoning agency for a public hearing and standards pertaining to the flood storage district, recommendation to the governing body. Copies of pursuant to chapter NR 116, Wisconsin the proposed amendment and notice of the public Administrative Code. hearing shall be submitted to the appropriate district (3) Applicability. The provisions of this section office of the department of natural resources for apply to all areas within the flood storage district, as review prior to the hearing. The amendment shown on the official floodplain zoning maps, and to procedure shall comply with the provisions of s. those portions of the general floodplain district that 59.97, Stats., except that no provision of this chapter are determined to be in the flood storage area. shall be construed to require town board approval or (4) Development in flood storage district. _ allow town board veto of any such amendment. (a) Development in a flood storage district (2) No amendment to the maps or text of this shall not cause an increase equal to or greater than ordinance shall become effective until reviewed and 0.01 of a foot in the height of the regional flood. approved by the department. (b) When any proposed development would --, (3) All persons petitioning for a map amendment remove flood storage volume, an equal volume of which involves an obstruction to flow causing an storage as defined by the ground surface and the increase of 0.01 foot or more in the height of the regional flood elevation shall be provided to regional flood shall obtain flooding easements, or compensate for the volume of storage which is lost. other appropriate legal arrangements, from all Excavation below the groundwater table is not adversely affected property owners and notify local considered as providing an equal volume of storage. units of government before the amendment can be 1. No area in the floodplain may be removed , approved by the governing body. from the flood storage district unless it can be shown , (4) When considering amendments to the official that the area has been filled to the flood protection floodplain zoning map in areas where no water elevation and is contiguous to other lands lying 1 surface profiles exist, the committee and board shall outside the floodplain. consider data submitted by the department,the zoning 2. If compensatory storage cannot be provided, administrator's visual on-site inspections and other the area may not be developed unless the entire available information. (See s. 17.12.) affected flood storage area is rezoned to the floodfringe district. [17.73-17.80 reserved for future use.] (c) A flood zone permit from the Dane County Zoning Administrator is required for any SUBCHAPTER VIII development in a flood storage district. FLOOD STORAGE DISTRICT (5) Rezone from flood storage district to floodfringe district. , i' Page 94 Revised 4-30-97 i