(A) The community shall review all permit applications to determine whether proposed building sites will be reasonably safe from flooding. If a proposed building site is in a flood-prone area, all new construction and substantial improvements shall be designed and anchored to prevent flotation, collapse, or lateral movement of the structure resulting from hydrodynamic and hydrostatic loads; be constructed with flood-resistant materials; be constructed to minimize flood damages and to ensure that utility and mechanical equipment is designed and/or located so as to prevent water from entering or accumulating within the equipment during conditions of flooding.
(B) Subdivisions shall be reviewed for compliance with the above standards. All subdivision proposals (including manufactured home parks) shall include regional flood elevation and floodway data for any development that meets the subdivision definition of this chapter and all other requirements in § 155.07(B)(2). Adequate drainage shall be provided to reduce exposure to flood hazards and all public utilities and facilities, such as sewer, gas, electrical, and water systems are located and constructed to minimize or eliminate flood damages.
(1) Hydraulic and hydrologic analyses.
(a) No floodplain development shall:
1. Obstruct flow, defined as development which blocks the conveyance of floodwaters by itself or with other development, causing any increase in the regional flood height; or
2. Cause any increase in the regional flood height due to floodplain storage area lost.
(b) The Zoning Administrator shall deny permits if it is determined the proposed development will obstruct flow or cause any increase in the regional flood height, based on the officially adopted FIRM or other adopted map, unless the provisions of § 155.08 are met.
(2) Watercourse alterations.
(a) No land use permit to alter or relocate a watercourse in a mapped floodplain shall be issued until the local official has notified in writing all adjacent municipalities, the Department and FEMA regional offices, and required the applicant to secure all necessary state and federal permits. The standards of § 155.02(B)(1) must be met and the flood carrying capacity of any altered or relocated watercourse shall be maintained.
(b) As soon as is practicable, but not later than six months after the date of the watercourse alteration or relocation and pursuant to § 155.08, the community shall apply for a letter of map revision (LOMR) from FEMA. Any such alterations must be reviewed and approved by FEMA and the DNR through the LOMC process.
(3) Wis. Stats. Chapters 30, 31 development. Development which requires a permit from the Department, under Wis. Stats. Chapters 30 and 31, such as docks, piers, wharves, bridges, culverts, dams and navigational aids, may be allowed if the necessary permits are obtained and amendments to the floodplain zoning chapter are made according to § 155.08.
(4) Public or private campgrounds. Public or private campgrounds shall have a low flood damage potential and shall meet the following provisions:
(a) The campground is approved by the Department of Health Services;
(b) A land use permit for the campground is issued by the Zoning Administrator;
(c) The character of the river system and the campground elevation are such that a 72-hour warning of an impending flood can be given to all campground occupants;
(d) There is an adequate flood warning procedure for the campground that offers the minimum notice required under this section to all persons in the campground. This procedure shall include a written agreement between the campground owner, the municipal emergency government coordinator and the chief law enforcement official which specifies the flood elevation at which evacuation shall occur, personnel responsible for monitoring flood elevations, types of warning systems to be used and the procedures for notifying at-risk parties, and the methods and personnel responsible for conducting the evacuation;
(e) This agreement shall be for no more than one calendar year, at which time the agreement shall be reviewed and updated by the officials identified in division (d) above to remain in compliance with all applicable regulations, including those of the state Department of Health Services and all other applicable regulations;
(f) Only camping units that are fully licensed, if required, and ready for highway use are allowed;
(g) The camping units shall not occupy any site in the campground for more than 180 consecutive days, at which time the camping unit must be removed from the floodplain for a minimum of 24 hours;
(h) All camping units that remain on site for more than 30 days shall be issued a limited authorization by the campground operator, a written copy of which is kept on file at the campground. Such authorization shall allow placement of a camping unit for a period not to exceed 180 days and shall ensure compliance with all the provisions of this section;
(i) The municipality shall monitor the limited authorizations issued by the campground operator to assure compliance with the terms of this section;
(k) The campground shall have signs clearly posted at all entrances warning of the flood hazard and the procedures for evacuation when a flood warning is issued; and
(l) All service facilities, including but not limited to refuse collection, electrical service, gas lines, propane tanks, sewage systems and wells shall be properly anchored and placed at or floodproofed to the flood protection elevation.
(Ord. 2015-54, passed 11-5-15)