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<br /> <br />53 <br /> <br />a. Above-Ground Utility Lines and Pipes. Utility lines and pipes that are above- <br />ground, properly anchored and/or designed so that they will not increase the risk or <br />consequences of static or seismic slope instability or result in an increased risk of <br />mass wasting. Such utility lines may be permitted only when the applicant <br />demonstrates that no other feasible alternative is available to serve the affected <br />population. For pipelines, automatic shut off valves should be located as close as <br />practical to the landslide area so that the release from the pipe upon breakage is <br />minimized. <br />b. Access Roads and Trails. Access roads and trails that are engineered and built to <br />standards that avoid the need for major repair or reconstruction beyond that which <br />would be required in non-hazard areas. Access roads and trails may be permitted <br />only if the applicant demonstrates that no other feasible alternative route exists. <br />Standards to minimize impacts may be specified by the Director. <br />c. Stormwater Conveyance. Stormwater conveyance through a properly designed <br />stormwater pipe when no other stormwater conveyance alternative is available. The <br />pipe shall be located above-ground and be properly anchored and/or designed so <br />that it will continue to function in the event of a slope failure or movement of the <br />underlying materials and will not increase the risk or consequences of static or <br />seismic slope instability or result in increased risk of mass wasting activity. <br />3. Setbacks. The Director shall require setbacks from the edges of any landslide hazard area <br />in accordance with the following: <br />a. The size of the setbacks shall be based on the findings of a qualified engineering <br />geologist or geologist, licensed in the state of Washington, and shall protect critical <br />areas and minimize the risk of property damage, death, or injury resulting from <br />landslides caused in whole or part by the alteration or development and shall be <br />sized to provide protection for a period of at least 100 years based on the <br />assessment of the geologic processes within the landslide hazard area; <br />b. The setback above the landslide hazard area shall include consideration of <br />hydrologic contribution to the landslide area and/or the area subject to the potential <br />for mass movement, and the setback down slope from the landslide hazard area <br />shall include consideration of landslide run out; and <br />c. The Director shall have the authority to require appropriate management of <br />vegetation or land use within the setback area to minimize the risk of increasing the <br />risk of landslides. <br /> <br />17A.06.050 Erosion Hazard Area Standards <br />1. Generally. Alterations or development may be allowed within erosion hazard areas, provided <br />that all responsible measures have been taken to minimize risks and other adverse effects <br />with erosion hazards, and the amount and degree of the alteration are limited to minimum <br />needed to accomplish the project purpose. Prior to approving a development or alteration in <br />or adjacent to an erosion hazard area, a report will be prepared as defined in KCC <br />17A.06.100. Based on this information, the Director shall determine whether all the following <br />standards are met. <br />a. The alteration or development includes all appropriate measures to eliminate or <br />otherwise mitigate risks to health and safety; <br />b. The alteration or development includes best management practices to prevent, <br />control and minimize erosion; <br />c. The alteration or development will not increase erosion potential; <br />d. The removal and disturbance of vegetation, clearing, or grading shall be limited to <br />the area of the approved alteration or development; <br />e. The alteration or development will not increase surface water discharge or <br />sedimentation to adjacent properties beyond predevelopment conditions, as