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2. There must be openings on at least two sides of the structure and the bottom of all openings must be no higher than one foot above the lowest adjacent grade to the structure. Using human intervention to open a garage door prior to flooding will not satisfy this requirement for automatic openings. Water-oriented accessory structures located less than 75 feet from the ordinary high-water mark shall not be greater than ten feet in height and 100 square feet in area and shall be screened as much as practical from view from the public water, utilizing vegetation, topography and/or color treatment (assuming summer leaf-on conditions), subject to the review and approval of the city. DNR – Model Ordinance – 7.0 PERFORMANCE STANDARDS FOR PUBLIC AND PRIVATE FACILITIES Section 7.3 Water-oriented Accessory Structures or Facilities. Each residential lot may have one water-oriented accessory structure or facility if it complies with the following provisions: 7.31 The structure or facility must not exceed ten feet in height, exclusive of safety rails, and cannot occupy an area greater than 250 square feet. The structure or facility may include detached decks not exceeding eight feet above grade at any point or at-grade patios; 7.32 The structure or facility is not in the Bluff Impact Zone; 7.33 The setback of the structure or facility from the ordinary high water level must be at least ten feet; 7.34 The structure is not a boathouse or boat storage structure as defined under Minnesota Statutes, Section 103G.245; 7.35 The structure or facility must be treated to reduce visibility as viewed from public waters and adjacent shorelands by vegetation, topography, increased setbacks or color, assuming summer, leaf-on conditions; 7.36 The roof may be used as an open-air deck with safety rails, but must not be enclosed with a roof or sidewalls or used as a storage area; 7.37 The structure or facility must not be designed or used for human habitation and must not contain water supply or sewage treatment facilities; 7.38 As an alternative for general development and recreational development waterbodies, water- oriented accessory structures used solely for storage of watercraft and boating-related equipment may occupy an area up to 400 square feet provided the maximum width of the structure is 20 feet as measured parallel to the shoreline; and 7.39 Water-oriented accessory structures may have the lowest floor placed lower than the elevation specified in Section 6.43 if the structure is designed to accommodate internal flooding, constructed of flood-resistant materials to the elevation, electrical and mechanical equipment is placed above the elevation