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33 Revised 10/03/2019 Ordinance Language Commentary 10.51 Step 1. Identify Density Analysis Tiers. Divide the project parcel into tiers by drawing one or more lines parallel to the ordinary high water level at the following intervals, proceeding landward: Waterbody Classification No Sewer (ft) Sewer (ft) General Development Lakes – 1st tier 200 200 General Development Lakes – all other tiers 267 200 Recreational Development Lakes 267 267 Natural Environment Lakes 400 320 All Rivers 300 300 10.52 Step 2. Calculate Suitable Area for Development. Calculate the suitable area within each tier by excluding all wetlands, bluffs, or land below the ordinary high water level of public waters. 10.53 Step 3. Determine Base Density: A. For residential PUDs, divide the suitable area within each tier by the minimum single residential lot area for lakes to determine the allowable number of dwelling units, or base density, for each tier. For rivers, if a minimum lot area is not specified, divide the tier width by the minimum single residential lot width. B. For commercial PUDs: (1) Determine the average area for each dwelling unit or dwelling site within each tier. Include both existing and proposed dwelling units and sites in the calculation. (a) For dwelling units, determine the average inside living floor area of dwelling units in each tier. Do not include decks, patios, garages, or porches and basements, unless they are habitable space. (b) For dwelling sites (campgrounds), determine the area of each dwelling site as follows: For manufactured homes, use the area of the manufactured home, if known, otherwise use 1,000 sf. For recreational vehicles, campers or tents, use 400 sf. 10.53.A. For LGUs that have specified a minimum lot area for river lots, the process for determining base density for lakes and rivers will be the same – tier area divided by lot area.