11-5 Required Documents

11-5.1. In addition to documents required during subdivision, site plan, and building permitting process, the following documents are required for reviewing development containing any sensitive lands, unless excused as under Section 11-5. 11-5.2. Slope Analysis Exhibit: If a parcel contains a slope of 20% or greater, as shown in Exhibit N: Sensitive Lands Overlay Map, the applicant must prepare a slope analysis exhibit. 11-5.2.1. The slope analysis must include a base topographical map of the subject site that is prepared and signed by a Utah-licensed civil engineer or land surveyor. This base topographical map must show all of the adjoining properties within 150 feet of the site boundaries. 11-5.2.2. The slope analysis calculations must be prepared by a Utah-licensed professional. This slope analysis must be prepared using CAD-based or GIS-based software specifically designed for slope analysis calculations. Contours on the exhibit must be prepared using no greater than two-foot contour intervals with ten-foot contours clearly labeled and at a scale of at least one inch equals one hundred feet (1" = 100'). The slope analysis exhibit must delineate slope bands with contrasting colors for the following slope ranges: zero percent (0%) to twenty percent (20%), greater than twenty percent (>20%) to thirty percent (30%), greater than thirty percent (>30%) to forty percent (40%), and greater than forty percent (>40%). 11-5.2.3. The slope analysis exhibit must include a tabulation chart indicating the land area in acres within each slope category as identified in Section 11-5.2.2. 11-5.2.4. The slope analysis exhibit must include a sufficient number of slope cross sections to clearly illustrate the extent of the proposed grading. The slope cross sections must: 11-5.2.4.1. Each be drawn at the same scale and indexed or keyed to the existing topography, grading plan, and project site map. Both vertical and horizontal scales must be indicated and be of the same scale. The slope cross section must extend at least 150 feet outside the project site boundary. The slope calculations must be calculated in intervals of no greater than forty feet along the cross sections. 11-3 11-5.2.4.2. At a minimum, slope cross sections must be drawn along those locations of the project site where: 11-5.2.4.2.1. existing topography is altered; 11-5.2.4.2.2. development is proposed; 11-5.2.4.2.3. The site is most visible from surrounding land uses; and 11-5.2.4.2.4. Where grading will impact natural drainage conditions. 11-5.2.4.3. At least two of the slope profiles must be roughly parallel to each other and roughly perpendicular to existing contour lines. 11-5.2.4.4. The slope cross sections must be stamped and signed by a Utah-licensed professional who is proficient in creating cross sections indicating the datum, source, and scale of topographic data used in the slope profiles. The professional must certify in the exhibit that the slope profiles have been accurately calculated and identified. 11-5.2.4.5. The slope cross sections must show existing and proposed topography, structures, and roadways. Proposed topography and features must be drawn with a solid line. Existing topography and features must be drawn with a dashed line. 11-5.3. Additional Exhibits or Reports: The development committee, city engineer, planning commission, and the city council may request additional exhibits, documents, or reports necessary to adequately understand the unique circumstances and the full impact of any proposed development. These additional exhibits, documents, or reports must be submitted with other application materials. Examples of additional exhibits, documents, or reports that may be requested under this Section 11-5.11 include but are not limited to the following: 11-5.3.1. A more detailed grading exhibit showing mitigation or grading details based on site visits with the developer's representative. 11-5.3.2. A computer-generated, three-dimensional imaging or photo-imbedded visual simulation depicting the impact of the development on the visual character of the site. A visual simulation must depict any topographical areas with steep slopes or unique topographical features planned for disturbance and must be illustrated with a perspective that adequately shows post-development conditions with the proposed mitigation for development. Predevelopment digital photographs of the site must be included showing the same views used in the post-development, computer-generated, three-dimensional imaging exhibits for comparison. The number of computer-generated exhibits and their locations and perspective will be based on site visits with the developer's representative. 11-4