Cuts or excavations shall conform to the provisions of this section, unless the department approves the alternative recommendations contained in a soils engineering report or engineering geology report required under SCC 30.63B.230 or 30.63B.240. A cut that is less than four feet in height shall not be required to meet the requirements of this section.
(1) The slope of cut surfaces shall be no steeper than is safe for the intended use, and shall be no steeper than one unit vertical to two units horizontal (50 percent slope), unless the applicant furnishes a soils engineering report or an engineering geology report, or both, stating that the site has been investigated and determining that a cut at a steeper slope will be stable and will not create a hazard to public or private property.
(2) Slopes shall be stabilized after being cut or excavated. The soils engineering report or the engineering geology report, or both, shall verify that the slopes shall not be subject to ongoing erosion that would adversely impact public safety or public or private property. Erosion hazard areas and landslide hazard areas, as defined in subtitle 30.9 SCC, shall be described and shown in the soils engineering report.
(3) Cuts or excavations within streams, wetlands, lakes, marine waters, fish and wildlife habitat conservation areas, erosion hazard areas, landslide hazard areas or the buffers of or setbacks from any of these areas shall not occur unless a critical area study is prepared and mitigation is provided consistent with the applicable requirements of chapters 30.62A and 30.62B SCC. (Amended Ord. 13-042 , 2013; Amended Ord. 10-023 , 2010.)