Chapter 17.35
GENERAL STANDARDS

Sections:

17.35.010    General standards applicable to all floodplain districts.

17.35.010 General standards applicable to all floodplain districts.

(a) General Standards.

(1) No development, except as provided in subsection (a)(2) of this section, shall be allowed in floodplain areas which will:

a. Cause an obstruction to flow, defined in AMC 17.10.010 as any development which physically blocks the conveyance of floodwaters by itself or in conjunction with future similar development causing an increase in regional flood height; or

b. Cause an increase in regional flood height due to floodplain storage area lost, which is equal to or exceeding 0.01 foot.

(2) Obstructions or increases equal to or greater than 0.01 foot may only be permitted in amendments made to this title, the official floodplain zoning maps, including floodway lines and water surface profiles, in accordance with Chapter 17.45 AMC, and only if the total cumulative effect of the proposed development will not increase the height of the regional flood more than 0.01 foot for the affected hydraulic reach of the stream.

(3) The zoning administrator shall deny permits where it is determined the proposed development will cause an obstruction to flow or increase in regional flood height of 0.01 foot or greater.

(b) Mobile Homes and Manufactured Homes.

(1) Owners or operators of all manufactured or mobile home parks and subdivisions located in the regional floodplain shall provide for adequate surface drainage to minimize flood damage.

(2) All new, replacement and substantially improved manufactured or mobile homes to be placed or improved on a site located in the regional floodplain shall:

a. Be elevated to the flood protection elevation;

b. Meet the residential development standards for the flood fringe in AMC 17.25.030(b); and

c. Be anchored so they do not float, collapse or move laterally during a flood.

(c) Watercourse Alterations. Prior to any alteration or relocation of a watercourse, and prior to the issuance of any land use permit which may be required for the alteration or relocation of a watercourse, the zoning administrator shall notify, in writing, adjacent municipalities, the appropriate district office of the Department of Natural Resources and the appropriate office of FEMA and shall require the applicant to secure all necessary state and federal permits. The flood carrying capacity within the altered or relocated portion of any watercourse shall be maintained.

(d) Chapters 30 and 31, Wis. Stats., Development. Development which requires a permit from the Department of Natural Resources, under Chapters 30 and 31, Wis. Stats., such as docks, piers, wharves, bridges, culverts, dams and navigational aids may be allowed provided the necessary local permits are obtained and necessary amendments to the official floodway lines, water surface profiles, floodplain zoning maps or floodplain zoning ordinance, are made according to Chapter 17.45 AMC. [Ord. dated 3/6/12 § 107. Prior code § 10-2-18].