§ 22-415. Steep And Severe Slopes.
   1.   For development of hillsides, the developer shall prepare the following:
      Development plans shall show the location of steep (15-25%) and severe (greater than 25%) slope areas. These areas may be delineated from U.S. Geological Survey topographic maps, or if a greater level of detail is necessary, a field survey compiled by a registered land surveyor, engineer, landscape architect or geologist may be required.
   2.   The following protection requirements shall be required for such hillside subdivision and land development:
      A.   Erosion and Sedimentation Control Plan. An erosion and sedimentation control plan shall be required prior to disturbance of any steep or severe slope area, in accordance with provisions of § 22-409 of this Chapter.
      B.   Soil Stability Analysis. A soil stability analysis shall be performed by a professional soil scientist prior to the disturbance of steep slope areas in excess of 2,000 square feet. This analysis shall evaluate the impact upon the stability of the slope and shall include mitigation techniques.
      C.   Final plan approval shall require incorporation of mitigation measures in the site design.
      D.   Severe slopes (in excess of 25%) shall not be developed, nor their soil disturbed, except that such development shall be considered if innovative engineering is utilized.
(Ord. 3/9/1993A, § 414)