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2 <br /> a. Mapping and overlaying selected environmental <br /> parameters <br /> b. Districts that emerge in overlaying process <br /> represent areas of varying environmental constraints <br /> c. Development intensity type classifications are <br /> applied to the districts <br /> d. These classifications determine the type and <br /> intensity of land use that will be allocated to each <br /> district in the planning process <br /> 3. Approach was approved at a meeting of managers and <br /> planning directors on 1-22-85. <br /> 4. Mapping element has 2 components <br /> a. Environmental characteristics <br /> Attachment 1 (1) Slope - major factor in determining development <br /> intensity <br /> (a) 0 - 7 1/2% - High to moderate intensity <br /> development <br /> (b) 7 1/2 - 15% - Moderate to limited <br /> intensity development <br /> (c) over 15% - Severely limited development <br /> potential <br /> Attachment 2 (2) Slope Orientation - important from standpoint <br /> of energy conservation and livability; <br /> 2 classifications: <br /> (a) Warm slopes (E, SE, S, SW) <br /> (b) Cold slopes (N, NE, W, NW) <br /> Attachment 3 (3) Vegetative Cover - important for balanced <br /> ecology, aesthetics, retention of runoff, and <br /> groundwater replenishment; <br /> 3 categories: <br /> (a) Wetlands <br /> (b) Forest <br /> (c) Open <br /> Attachment 4 (4) Soil Suitability - major factor in 1 <br /> determination of development potential: <br /> (a) 3 categories <br /> i. Desirable <br /> ii. Marginal <br /> iii. Undesirable <br /> (b) Categories based on: <br /> i. High / low slope <br /> ii. Depth to groundwater <br /> iii. Plasticity <br /> iv. Depth to bedrock <br /> b. Accessibility Characteristics <br /> Attachment 5 (1) Based on travel times in feet per minute (FPM) <br /> for various types of roads <br /> (a) Interstate - 4840 FPM (55 MPH) <br /> (b) Arterial - 3960 FPM (45 MPH) <br /> (c) Collector - 3080 FPM (35 MPH) <br />