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Jut? M, ones <br />Page4ef6 <br />fimiredf .oltthWcel Hvaluetion <br />b. Those areas defined as medium risk oferesion in the Dames and Moore Methodology for the <br />Inventory, Classification and DesiAration of Geologically Hazardous Areas, City of Everett, <br />Washington: July 1, 1991, or as revised throughbest available science, when they contain debris <br />and mud flows, gullying or rifling, immature vegetation, or no vegetation: <br />(1) Slopea oftwenty-fivem forty percent in other (not Qva or Qal) geologic units. <br />q. other areas which the city has reasonto believe as geologically hazardous. <br />The -- that thed 1 ed portionof the site is underlain by Ald Urban <br />land t sl ) The stunner slonses are underlainby Ald d-E tt <br />_» d l t l 1 <br />IV general,lll+, Erngga, ig"tial at the she Varies from low to verr b' h depending on the 1 <br />magn'tu potentials ¢roll include 'th SlOTaS Of P t Or more <br />in the ravinef num and steappc s <br />While the affected haw a secure hu m, severe DMgBsgpmmrfioI. it does not appear that <br />sinai�t emsion getarrW during vesandion removal and replacement work. Provided all areas <br />remainfially anead.the ksmal will remain rotatively low <br />B. Geologically Hazardous Slope Setbacks and Slope Protection. <br />1. Geotechnical Assessme rt Requirements. Development proposals on or within two hundred <br />feet of any area designated as or which, based on site -specific field investigation, the city has <br />reason to believe are geologically hazardous areas shall submit a geological assessment as <br />required by subsection F of this section. <br />2. The setback buffer requirement shall be based upon information contained in a geological <br />assessment, and shall be measured on a horizontal plane from a vertical line established at the <br />edge of the geologically hazardous area limits (both from the top and toe of slope). In the event <br />that a specific setback buffer is not included in the recommendation of the geological assessment, <br />the setback buffer shall be based upon the standards contained in Chapter vi.18 of the <br />International Building Code (IBC), or as the IBC is updated and amended. <br />a. If the geological assessment recommends setbackbuffers that are less than the <br />standardbuHersthat would result from application of Chapterig.18of the IBC, the specific <br />rationale and basis for the roducedbuffers shall be Clearly articulated in the geological <br />assessment. <br />b. The city may requirelarger setbackbufferwidths under werafthefollowing circumstances: <br />H) The land is susceptible to severe erosion and erosion control measures will not effectively <br />preventadverseimpacts. <br />(2) The area base severe risk of slope failure or downslope stormwater drainage impacts. <br />(3) The increased bufferis necessary to protect public health, safety and welfare based upon <br />findings and recommendations of the geological assessment. <br />3. Unless otherwise permitted as part of an approved alteration, the setbackbuffers required by <br />this subsection shall be maintained in native vegetation to provide additional soil stability <br />anderosioncentrol. If thebuHerarea has been cleared, it shall be replanted withnative <br />vegetation in conjunction with artyproposed developmentactivlty. <br />w lmlh m (206)331-IOW <br />