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1271 2. Ensure the long-term preservation and maintenance of open <br />1272 space in accordance with the criteria and analysis specified in this <br />1273 subdivision. <br />1274 <br />1275 d. When necessary, a master plan/drawing describing the project and <br />1276 the floor plan for all commercial structures to be occupied. <br />1277 <br />1278 e. <br />1279 <br />1280 (4) <br />1281 <br />1282 <br />1283 <br />1284 <br />1285 <br />1286 <br />Those additional documents as requested by the city that are <br />necessary to explain how the PUD will be designed and will function. <br />Site "suitable area" evaluation. Proposed new or expansions to existing <br />planned unit developments must be evaluated using the following procedures <br />and standards to determine the suitable area for the dwelling unit/dwelling <br />site density evaluation. <br />a. The project parcel must be divided into tiers by locating one or more <br />lines approximately parallel to a line that identifies the ordinary high water <br />level at the following intervals, proceeding landward: <br />Shoreland Tier Dimensions <br />Unsewered Sewered <br />(feet) (feet) <br />General development lakes —first tier 200 200 <br />General development lakes —second and additional tiers 267 200 <br />Recreational development lakes 267 267 <br />Natural environment lakes 400 320 <br />All river classes 300 300 <br />1287 b. The suitable area within each tier is next calculated by excluding from <br />1288 the tier area all wetlands, bluffs, or land below the ordinary high water level of <br />1289 public waters. This suitable area and the proposed project are then subjected <br />1290 to either the residential or commercial planned unit development density <br />1291 evaluation steps to arrive at an allowable number of dwelling units or sites. <br />1292 <br />1293 (5) Residential and commercial PUD density evaluation. The procedures for <br />1294 determining the base density of a PUD and density increase multipliers are <br />1295 as follows. Allowable densities may be transferred from any tier to any other <br />1296 tier further from the waterbody, but must not be transferred to any other tier <br />1297 closer. <br />1298 <br />1299 a. Residential PUD base density evaluation. The suitable area within <br />1300 each tier is divided by the single residential lot size standard for lakes or, for <br />1301 rivers, the single residential lot width standard times the tier depth, unless the <br />1302 local unit of government has specified an alternative minimum lot size for <br />1303 rivers which shall then be used to yield a base density of dwelling units or <br />35 <br />