(A) Public utilities. All public utilities and facilities such as gas, electrical, sewer, and water supply systems to be located in the flood plain must be floodproofed in accordance with the State Building Code or elevated to the regulatory flood protection elevation.
(B) Public transportation facilities. Railroad tracks, roads, and bridges to be located within the flood plain must comply with § 152.513(C) and (D). These transportation facilities must be elevated to the regulatory flood protection elevation where failure or interruption of these facilities would result in danger to the public health or safety or where such facilities are essential to the orderly functioning of the area. Minor or auxiliary roads or railroads may be constructed at a lower elevation where failure or interruption of transportation services would not endanger the public health or safety. None of these uses shall increase flood elevations.
(C) Non-habitable park shelters and other community assembly structures when accessory to park uses shall be permitted, but shall be constructed using flood proofing measures to the regulatory flood protection elevation, in accordance with the State Building Code, and shall not increase flood elevations. Buildings over 500 square feet must be dry flood proofed to the flood proofing standards in the State Building Code.
(D) On-site water supply and sewage treatment systems. Where public utilities are not provided:
(1) On-site water supply systems must be designed to minimize or eliminate infiltration of flood waters into the systems and are subject to the provisions in Minnesota Rules Chapter 4725.4350, as amended; and
(2) New or replacement on-site sewage treatment systems must be designed to minimize or eliminate infiltration of flood waters into the systems and discharges from the systems into flood waters, they must not be subject to impairment or contamination during times of flooding, and are subject to the provisions in Minnesota Rules Chapter 7080.2270, as amended.
(E) Manufactured homes. New manufactured home parks and expansions to existing manufactured home parks are prohibited in any Flood Plain District. For existing manufactured home parks or lots of record, the following requirements apply:
(1) Placement or replacement of manufactured home units is prohibited in the Floodway District.
(2) If allowed in the Flood Fringe District, placement or replacement of manufactured home units is subject to the requirements of § 152.513(D) and the following standards:
(a) New and replacement manufactured homes must be elevated in compliance with § 152.513(D) and must be securely anchored to an adequately anchored foundation system that resists flotation, collapse and lateral movement. Methods of anchoring may include, but are not limited to, use of over-the-top or frame ties to ground anchors. This requirement is in addition to applicable state or local anchoring requirements for resisting wind forces.
(b) New or replacement manufactured homes in existing manufactured home parks must meet the vehicular access requirements for subdivisions in § 152.517(B).
(F) Recreational vehicles. New recreational vehicle parks or campgrounds and expansions to existing recreational vehicle parks or campgrounds are prohibited in any Flood Plain District. Storage of recreational vehicles and equipment shall be in conformance with the regulations of the city, less than 400 square feet in size and equipment may be temporarily stored (for a maximum period of 180 days) if permitted in the underlying district and in compliance with all other sections of the City Code. Placement of recreational vehicles in existing recreational vehicle parks or campgrounds or as storage in the flood plain must meet the exemption criteria below or be treated as new structures meeting the requirements of this subchapter.
(1) Recreational vehicles are exempt from the provisions of this subchapter if they are placed in any of the following areas and meet the criteria listed in division (F)(2) below:
(a) Individual lots or parcels of record.
(b) Existing commercial recreational vehicle parks or campgrounds.
(c) Existing condominium-type associations.
(2) Criteria for exempt recreational vehicles:
(a) The vehicle must have a current license required for highway use.
(b) The vehicle must be highway ready, meaning on wheels or the internal jacking system, attached to the site only by quick disconnect type utilities commonly used in campgrounds and recreational vehicle parks.
(c) No permanent structural type additions may be attached to the vehicle.
(d) The vehicle and associated use must be permissible in any pre-existing, underlying zoning district.
(e) Accessory structures are not permitted within the Floodway District. Any accessory structure in the Flood Fringe District must be constructed of flood-resistant materials and be securely anchored, meeting the requirements applicable to manufactured homes in division (E)(2) above.
(f) An accessory structure must constitute only a minimal investment.
(3) Recreational vehicles that are exempt in (F)(2) above lose this exemption when development occurs on the site that exceeds a minimal investment for an accessory structure such as a garage or storage building. The recreational vehicle and all accessory structures will then be treated as new structures subject to the elevation and floodproofing requirements of § 152.513(D). No development or improvement on the parcel or attachment to the recreational vehicle is allowed that would hinder the removal of the vehicle should flooding occur.
(G) Building sites. If a proposed building site is in a flood prone area, all new construction and substantial improvements (including the placement of manufactured homes) must be:
(1) Designed (or modified) and adequately anchored to prevent floatation, collapse, or lateral movement of the structure resulting from hydrodynamic and hydrostatic loads, including the effects of buoyancy;
(2) Constructed with materials and utility equipment resistant to flood damage;
(3) Constructed by methods and practices that minimize flood damage; and
(4) Constructed with electrical, heating, ventilation, plumbing, and air conditioning equipment and other service facilities that are designed and/or located so as to prevent water from entering or accumulating within the components during conditions of flooding.
(Ord. 2000-936; Am. Ord. 2005-1033, passed 2-7-05; Am. Ord. 2016-1209, passed 10-10-16)