Ordinance 3676-19 - Laserfiche WebLink

1. A field investigation and geological assessment shall be completed to evaluate whether or not an active geological hazard area exists within two hundred feet of the site. a. The geological assessment shall be submitted in the form of a geotechnical letter when the geologist or geotechnical engineer finds that no active geological hazard area exists on or within two hundred feet of the site.The geotechnical letter shall meet the minimum required content listed in this section and shall be in the format established by the director. b. The geological assessment shall be submitted in the form of a geotechnical report when the geologist or geotechnical engineer finds that an active geologically hazardous area exists on or within two hundred feet of the proposed project area.The geotechnical report shall meet the minimum requirements established by the director pursuant to this section. 2. A geological assessment shall include a field investigation and may include the use of historical air photo analysis, review of public records and documentation,and interviews with adjacent property owners or others knowledgeable about the area,etc. 3. A geological assessment shall include the following minimum information and analysis: a. An evaluation of any areas on the site or within two hundred feet of the site that are geologically hazardous as set forth in subsection A of this section, Designation. b. An analysis of the potential impacts of the proposed development activity on any geologically hazardous area.The analysis shall include information regarding any potential geological hazard that could result from the proposed development either on-site or off-site. For landslide hazard areas,the analysis shall consider the run-out hazard of landslide debris to the proposed development that starts upslope,whether the slope is part of the subject property or starts off-site. c. Identification of any mitigation measures required to eliminate potentially significant geological hazards both on the proposed development site and any potentially impacted off- site properties.When hazard mitigation is required,the mitigation plan shall specifically address how the proposed activity maintains or reduces the preexisting level of risk to the site and adjacent properties on a long-term basis.The mitigation plan shall include recommendations regarding any long-term maintenance activities that may be required to mitigate potential hazards. d. The geological assessment shall document the field investigations, published data and references,data and conclusions from past geological assessments,or geotechnical investigations of the site,site-specific measurements,tests, investigations,or studies, as well as the methods of data analysis and calculations that support the results,conclusions, and recommendations. e. The geological assessment shall contain a summary of any other information the geologist identifies as relevant to the assessment and mitigation of geological hazards. C. Additional Critical Area Report Content for Wetlands. A critical area report for wetlands shall be prepared by a qualified professional who is a certified professional wetland scientist, a noncertified professional wetland scientist with a minimum of five years of experience in the field of wetland science,including experience preparing wetland and stream reports,or a professional who demonstrates expertise in wetland science,stream ecology, or fish and wildlife biology-to the satisfaction of the planning director. 1. Wetland shall be rated according to the categories defined by the Washington State Department of Ecology Washington State Rating System for Western Washington 2014 Update,or as revised (Ecology Publication No. 14-06-029). 2. Hydrogeomorphic classification;wetland acreage,and Cowardin classification of vegetation communities;and to the extent possible, hydrologic information such as location and condition EMC Title 19.37 (Critical Areas) Page 19