Exhibit A KCC 17A Revisions - Laserfiche WebLink

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Kittitas County, WA § 17A.06.040 KITTITAS COUNTY CODE § 17A.06.040 Downloaded from https://ecode360.com/KI6857 on 2025-05-15 the approved alteration or development; g. The alteration or development will not increase surface water discharge or sedimentation to adjacent properties beyond predevelopment conditions; h. The proposed alterations will not adversely impact other critical areas; and i. Structures and improvements including drainage and vegetation management are designed to have no impact on the slope stability; and j. If development takes place within an identified geologically hazardous area, the development must be designed to fully mitigate the risk to the structure(s) and not increase the risk to the public, other properties or public infrastructure or resources. 2. Permitted alterations and development. The following alterations and development may be allowed in landslide hazard areas when all reasonable measures have been taken to minimize risks and other adverse effects associated with landslide hazards, and when the amount and degree of alteration is limited to the minimum needed to accomplish the alteration or development: a. Above-ground utility lines and pipes. Utility lines and pipes that are above-ground, properly anchored and/or designed so that they will not increase the risk or consequences of static or seismic slope instability or result in an increased risk of mass wasting. Such utility lines may be permitted only when the applicant demonstrates that no other feasible alternative is available to serve the affected population. For pipelines, automatic shut off valves should be located as close as practical to the landslide area so that the release from the pipe upon breakage is minimized. b. Access roads and trails. Access roads and trails that are engineered and built to standards that avoid the need for major repair or reconstruction beyond that which would be required in non- hazard areas. Access roads and trails may be permitted only if the applicant demonstrates that no other feasible alternative route exists. Standards to minimize impacts may be specified by the Director. c. Stormwater conveyance. Stormwater conveyance through a properly designed stormwater pipe when no other stormwater conveyance alternative is available. The pipe shall be located above- ground and be properly anchored and/or designed so that it will continue to function in the event of a slope failure or movement of the underlying materials and will not increase the risk or consequences of static or seismic slope instability or result in increased risk of mass wasting activity. 3. Setbacks. The Director shall require setbacks from the edges of any landslide hazard area in accordance with the following: a. The size of the setbacks shall be based on the findings of a qualified engineering geologist or geologist, licensed in the state of Washington, and shall protect critical areas and minimize the risk of property damage, death, or injury resulting from landslides caused in whole or part by the alteration or development and shall be sized to provide protection for a period of at least 100 years based on the assessment of the geologic processes within the landslide hazard area; b. The setback above the landslide hazard area shall include consideration of hydrologic contribution to the landslide area and/or the area subject to the potential for mass movement, and the setback down slope from the landslide hazard area shall include consideration of landslide run out; and