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or other facilities that no longer need to be located in shore <br /> or bluff impact zones; <br /> (b) remedial measures to correct erosion <br /> sites and improve vegetative cover and screening of buildings <br /> and other facilities as viewed from the water ; and <br /> (c) if existing dwelling units are located <br /> in shore or bluff impact zones, conditions are attached to <br /> approvals of conversions that preclude exterior expansions in <br /> any dimension or substantial alterations. The conditions must <br /> also provide for future relocation of dwelling units, where <br /> feasible, to other locations, meeting all setback and elevation <br /> requirements when they are rebuilt or replaced. <br /> ( 4) Existing dwelling unit or dwelling site <br /> densities that exceed standards in this part may be allowed to <br /> continue but must not be allowed to be increased, either at the <br /> time of conversion or in the future. Efforts must be made <br /> during the conversion to limit impacts of high densities by <br /> requiring seasonal use, improving vegetative screening, <br /> centralizing shore recreation facilities, installing new sewage <br /> treatment systems, or other means. <br /> Subp. 6. Commercial planned unit development density <br /> evaluation steps and design criteria. The density evaluation <br /> steps and design criteria for commercial planned unit <br /> developments are contained in items A and B: <br /> A. Density evaluation steps: <br /> ( 1) Determine the average inside living area size <br /> of dwelling units or sites within each tier , including both <br /> existing and proposed units and sites. Computation of inside <br /> living area sizes need not include decks, patios, stoops, steps , <br /> garages, or porches and basements, unless they are habitable <br /> space. <br /> ( 2) Select the appropriate floor area ratio from <br /> the following table: <br /> Commercial Planned Unit Development <br /> Floor Area Ratios* <br /> Public waters classes <br /> Sewered general Second and <br /> development additional tiers <br /> lakes; first on unsewered <br /> tier on general <br /> unsewered development <br /> general lakes; <br /> development recreational <br /> A-1.43 <br />