April Dane County Code of Ordinances

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Chapter 17 sewer lines are at elevations which make compliance shall be inundated to a depth greater than two feet or impractical provided the board of adjustment grants a subjected to flood velocities greater than two feet per variance due to dimensional restrictions. second during the regional flood. Inundation of such • (b) The basement or crawlway floor may be yards or parking areas exceeding two feet may be placed at the regional flood elevation providing it is allowed provided an adequate warning system exists floodproofed to the flood protection elevation. No to protect life and property. permit or variance shall allow any basement or (4) MANUFACTURING AND INDUSTRIAL USES. crawlway below the regional flood elevation. Any manufacturing or industrial structure or building (c) Contiguous dryland access19 shall be which is to be erected, constructed, reconstructed, provided from a structure or building to land which is altered or moved into the floodfringe area shall be outside of the floodplain, except as provided in para. protected to the flood protection elevation utilizing (d). fill, levees, floodwalls, adequate flood proofing (d) In existing developments, where existing measures in accordance with s. 17.65, or any streets or sewer lines are at elevations which make combination thereof. On streams or rivers having compliance with para. (c) impractical, the county prolonged flood durations, greater protection may be may permit new development and substantial required to minimize interference with normal plant improvements where access roads are at or below the operations. A lesser degree of protection, compatible regional flood elevation,provided: with the criteria in paras. (4) and (6), may be 1. The county has written assurance from the permissible for storage yards, parking lots and other appropriate local units of police, fire and emergency accessory structures or uses. services that rescue and relief will be provided to the (5) STORAGE MATERIALS. The storage of structure(s) by wheeled vehicles, considering the materials that are buoyant, flammable, explosive, or anticipated depth, duration and velocity of the which in times of flooding, could be injurious to regional flood event;or property, water quality or human, animal, plant, fish 2. The county's natural disaster plan has been or aquatic life, shall be at or above the flood approved by both the division of emergency protection elevation for the particular area or government and the department. floodproofed in compliance with s. 17.65. Adequate (2) ACCESSORY STRUCTURES OR USES. An measures shall be taken to assure that said materials accessory structure or use20 not connected to a will not enter the river or stream during flooding. principal structure, including nonresidential (6) PUBLIC UTILITIES, STREETS AND agricultural structures, shall meet all the applicable BRIDGES. All utilities, streets and bridges should be provisions of s. 17.335(1)(a), (c)and(d)and sub. (5) designed to be compatible with the local below. A lesser degree of protection, compatible comprehensive floodplain development plans;and with these criteria and the criteria in sub. (4), may be (a) When failure or interruption of public permissible for an accessory structure or use utilities, streets and bridges would result in danger to providing that the site is not inundated to a depth the public health or safety,or where such facilities are greater than 2 feet or subjected to flood velocities essential to the orderly functioning of the area, greater than 2 feet per second during the regional construction of and substantial improvements to such flood. facilities may only be permitted if they are (3) COMMERCIAL USES. Any commercial floodproofed, in compliance with s. 17.65, to the structure or building which is to be erected, flood protection elevation; constructed, reconstructed, altered or moved into the (b) Minor or auxiliary roads or nonessential floodfringe area shall meet the requirements of s. utilities may be constructed at lower elevations 17.39(2). Storage yards, parking lots and other providing they withstand flood forces to the regional accessory structures or land uses may be at lower flood elevation. elevations, subject to the requirements of sub. (5). (7) SEWAGE SYSTEMS. All on-site sewage However, no such area in general use by the public disposal systems shall be floodproofed to the flood protection elevation and shall meet the applicable provisions of all local ordinances and ch. ILHR 83, 19See s. 17.05(11)for the definition. Wis.Adm.Code. 20See s. 17.05(2)for the definition. Page 86 Revised 4-30-97 •