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e. the structure or facility must not be designed or used for human habitation and <br /> must not contain water supply or sewage treatment facilities; and <br /> f. within the shoreland areas of general development and recreational <br /> development waterbodies, water - oriented accessory structures used solely for <br /> watercraft storage, and including storage or related boating and water - oriented <br /> sporting equipment, may occupy an area up to 400 square feet provided the <br /> maximum width of the structure is 20 feet as measured parallel to the <br /> configuration of the shoreline. <br /> 3. Stairways, Lifts, and Landings. Stairways and lifts are the preferred alternative <br /> to major topographic alterations for achieving access up and down steep slopes <br /> to shore areas. Stairways and lifts must meet the following design requirements: <br /> a. stairways and lifts must not exceed four feet in width on residential lots. <br /> Wider stairways may be used for commercial properties, public open -space <br /> recreational properties and planned development overlays; <br /> b. landings for stairways and lifts on residential lots must not exceed 32 square <br /> feet in area. Landings larger than 32 square feet may be used for commercial <br /> properties, public open -space recreational properties and planned development <br /> overlays; <br /> c. canopies or roofs are not allowed on stairways, lifts, or landings, <br /> d. stairways, lifts, and landings may be either constructed above the ground on <br /> posts or pilings, or placed into the ground, provided they are designed and <br /> built in a manner that ensures control of soil erosion; <br /> e. stairways, lifts, and landings must be located in the most visually <br /> inconspicuous portions of lots, as viewed from the surface of the public water <br /> assuming summer, leaf -on conditions, whenever practical; and <br /> f. facilities such as ramps, lifts, mobility paths for physically handicapped <br /> persons are also allowed for achieving access to shore areas, provided that the <br /> dimensional and performance standards of subitems (i) to (5) or complied <br /> with in addition to the requirements of Minnesota Regulations, Chapter 1340. <br /> 4. Significant Historic Sites. No structure may be placed on a significant historic <br /> site in a manner that affects the values of the site unless adequate information <br /> about the site has been removed and documented in a public repository. <br /> 5. Steep Slopes. The Zoning Administrator must evaluate possible soil erosion <br /> impacts and development visibility from public waters before issuing a permit for <br /> construction of sewage treatment systems, roads, driveways, structures, or other <br /> improvements on steep slopes. When determined necessary, conditions must be <br /> attached to issued permits to prevent erosion and to preserve existing vegetation <br />