1033 TEMPLE DR 2023-10-31 - Laserfiche WebLink

December i4,2020 Page 2 of 6 Limited Geologic Evaluation We observed the current site conditions and visually assessed adjacent steep slope areas during our site visit on December 10, 2020. We did not observe evidence of severe erosion or instability in any of the areas. All areas observed appear stable at this time. Limited erosion was observed; however, proper implementation of erosion control devices should adequately limit erosion on the property during construction. We understand that there are erosion and steep slope/landslide hazard areas within the property and on adjacent properties. The following are code items with our comments underlined after the relevant sections. A. Designation. The following geologically hazardous areas shall not be altered except as otherwise provided by this chapter: i. Landslide hazard areas: a. Those areas defined as high and very high/severe risk of landslide hazard in the Dames and Moore Methodology for the Inventory, Classification and Designation of Geologically Hazardous Areas,City of Everett,Washington:July 1, 1991,or as revised through best available science: (1) Very high/severe: slopes greater than fifteen percent in the Qtb, Qw, and Qls geologic units; and slopes greater than fifteen percent with uncontrolled fill. (2) High: slopes greater than forty percent in all other geologic units (not Qtb, Qw, and Qls or uncontrolled fill). b. Those areas defined as medium risk of landslide hazard in the Dames and Moore Methodology for Inventory, Classification and Designation of Geologically Hazardous Areas, City of Everett,Washington: July 1, 1991, or as revised through best available science,when combined with springs or seeps,immature vegetation,and/or no vegetation: (1) Slopes less than fifteen percent for Qtb,Qw,and Qls geologic units and uncontrolled fill. (2) Slopes of twenty-five percent to forty percent in all other geologic units. c. Any area with all three of the following characteristics: (1) Slopes greater than fifteen percent; and (2) Hillsides intersecting geologic contacts with a relatively permeable sediment overlying a relatively impermeable sediment or bedrock;and (3) Springs,ground water seepage,or saturated soils. d. Any area which has shown movement during the Holocene epoch (from ten thousand years ago to the present)or which is underlain or covered by mass wastage debris of that epoch. e. Any area potentially unstable as a result of rapid stream incision,stream bank erosion or undercutting by wave action. f. Areas of historic failures, including areas of unstable, old and recent landslides or landslide debris within a head scarp, and areas exhibiting geomorphological features indicative of past slope failure, such as hummocky ground, slumps, earthflows, mudflows,etc. g. Any area with a slope of forty percent or steeper and with a vertical relief of fifteen or more feet, except those manmade slopes created under the design and inspection of a geotechnical professional,or slopes composed of consolidated rock. www.cobaltgeo.com (2o6)331-1097