Ord-2021-006 - Laserfiche WebLink

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Kittitas County Shoreline Master Program i. Establishment of buffer zones; ii. Preservation of critically important plants and trees; iii. Limitation of access to the habitat conservation area; iv. Seasonal restriction of construction activities; andv. Establishment of a timetable for periodic review of the plan O. Requlations{eoloqicallv hazardous areas desiqnation. classification. and mapping 1. Designation: Lands classified as landslide, erosion, mine, volcanic, and seismic hazard areas are hereby designated as geologically hazardous areas and are subject to the standards of this Section. 2. Classification: Landslide hazard areas - lands potentially subject to landslides based on a combination of geologic, topographic, and hydrologic factors. They include any areas susceptible because of any combination of bedrock, soil, slope (gradient), slope aspect, structure, hydrology, or other factors. The following shall be designated as landslide hazards and are subject to the requirements of this Section: a. Areas of historic failures, such as: i. Those areas delineated by the Natural Resource Conservation Service (NRCS) as having a "severe" limitation for building site development; or ii. Those areas mapped as landslides, as having a liquefaction susceptibility, or having a NEHPR seismic site class of A through D on the most current Washington State Department of Natural Resources Division of Geology and Earth Resources natural hazards web based map; or iii. Areas designated as quaternary slumps, earth-flows, mudflows, lahars, or landslides on maps published by the U.S. Geological Survey or Washington State Department of Natural Resources Division of Geology and Earth Resources. b. Areas with all three (3) of the following characteristics: i. Slopes steeper than fifteen percent (15%); ii. Hillsides intersecting geologic contacts with a relatively permeable sediment overlying a relatively impermeable sediment or bedrock; and iii. Springs or groundwater seepage. c. Areas that have shown movement during the Holocene epoch (from 10,000 years ago to the present) or which are underlain or covered by mass wastage debris of this epoch; d. Slopes that are parallel or sub-parallel to planes of weakness (such as bedding planes, joint systems, and fault planes) in subsurface materials; e. Slopes having gradients steeper than eighty percent (80%) subject to rock fall during seismic shaking;f. Areas potentially unstable as a result of rapid stream incision, stream bank erosion, and undercutting by wave action, including stream channel migration zones; Chapter 5 March 7, 2016 78