A. Slope Gradient Of Fifteen Percent Or Greater: The standards contained in this chapter apply to all uses and structures within areas having a natural slope gradient of fifteen percent (15%) or greater over the area being graded and requiring a grading permit. For the purpose of this chapter, slope shall be computed as set forth in section 9.20.040 of this chapter for the area being graded before grading is commenced.
B. Site Conditions Requiring Hillside Grading Review: If the slope gradient is fifteen percent (15%) or greater and if any one of the following thresholds applies on a particular site meeting the criteria set forth in subsection A of this section, a full analysis and compliance with this chapter shall be required and a hillside grading review shall be conducted in compliance with section 9.20.030, "Hillside Grading Review", of this chapter:
1. The volume of proposed grading is more than five hundred (500) cubic yards per lot or more than a total of two thousand (2,000) cubic yards for the total project.
2. If retaining walls or the proposed cut or fill slopes greater than fifteen feet (15') in height will be visible and exposed to permanent public view or will be adjacent to designated open space or public lands.
3. The width of proposed cut or fill slopes is greater than one hundred fifty feet (150') as measured at the widest point of the slope.
4. The area of proposed disturbance is more than fifty percent (50%) of the site area, or the proposed disturbed area exceeds ten thousand (10,000) square feet, whichever is less. (Ord. 253, 12-16-2014)