Loading...
CRA19970123 Critical area recon report.pdf` Ic. 1,0", CITY OF EDMONDS 121 5"' Avenue North, Edmonds WA 98020 Phone: 425.771.0220 ® Fax: 425.771.0221 ® Web: www.ci.eclnnoxtds.wcr.�'is DEVELOPMENT SERVICES DEPARTMENT ® PLANNING DIVISION Critical ass Criticol Ar os 1-ile, Number. De>termrrrinotian Site l.ocotion Tax Acc(.wnt Number Property Owner Applic ont Critical Are as Present. Site S cxipu f:'lwA19970123 (update) .Study Required .11.0912t"Atrenue North 00548900002009 Richard and Barbara Stuart PO Bax 2w36 "drnond,s, WA .98020 Richard and Barbara ,Stuart: RI Geologically Hazordous Areas i"":"rosiarr Hazard Are a,s Immo landslide fl azcard Areas During review and inspection of the subject site, it was found that the site may contain (or be adjacent to) critical areas, including Geologically Hazardous Areas (Erosion Hazard Area or Landslide Hazard Area), pursuant to Chapter 23.40 of the Edmonds Community Development Code (ECDC). Geologically hazardous areas include areas susceptible to erosion, land sliding, earthquake, or other geological events. They pose a threat to the health and safety of citizens when incompatible development is sited in areas of significant hazard. Such incompatible development may not only place itself at risk, but also may increase the hazard to surrounding development and use. Cited sections of the Edmonds Community Development Code (ECDC) can be found on the City of Edmonds website at www.ci.edrnonds,waAJS. The subject property is part of a larger west facing slope which contains an existing residence that has been constructed into the slope. There is a rockery on the east side of the residence and a failed rockery west of the driveway leading into the residence. West of the driveway the property slopes down at approximately 44% according to the City's LiDAR information. Do to the steepness of the slopes on the property; the site has been identified as a potential landslide hazard area. Soils on the property are identified as Alderwood gravelly sandy loam 15 — 25% slopes. The soils together with the slopes also classify the site as a potential erosion hazard area. Projects proposed further than 65' from the top or toe of the slope (50' buffer + 15' setback from the critical area) may not require a geotechnical report to address critical areas issues (of course, other departments may require a report to address their codes). Projects within 65' of the top of the slope will require a geotechnical report consistent with the requirements identified below. Allowed itie& Exempt Proposals Certain activities are allowed in or near critical area buffers as specified in ECDC 23.40.220. Similarly, certain development proposals may be exempt from Critical Areas requirements (ECDC 23.40.230). If you have any questions about whether your proposed development qualifies as an allowed or exempt activity, please contact a Planner for more information. General Report Requiremei,its Critical Areas Reports identify, classify and delineate any areas on or adjacent to the subject property that may qualify as critical areas. They also assess these areas and identify any potential impacts resulting from your specific development proposal. If a specific development proposal results in an alteration to a critical area the critical areas report will also contain a mitigation plan. You have the option of completing the portion of the study that classifies and delineates the critical areas and waiting until you have a specific development proposal to complete the study. You may also choose submit the entire study with your specific development application. Please review the minimum report requirements for all types of Critical Areas which are listed in ECDC 23.40.090.D. There are additional report requirements for different types of critical areas (see below). Note that it is important for the report to be prepared by a qualified professional as defined in the ordinance. There are options on how to complete a critical areas study and an approved list of consultants that you may choose from. You may contact the Planning Division for more information. General Mitigation Requirements for all Critical Areas are discussed in ECDC 23.40.110 through 23.40.140. Erosion tl Areas It appears that this property contains or is adjacent to an Erosion Hazard Area. Geologically hazardous areas include areas susceptible to erosion, land sliding, earthquake, or other geological events. They pose a threat to the health and safety of citizens when incompatible development is sited in areas of significant hazard. Such incompatible development may not only place itself at risk, but also may increase the hazard to surrounding development and use. Erosion Hazard areas include Alderwood and Everett series soils on slopes of 15 percent or greater, among others. Landslide Hazard Areas are further defined in ECDC 23.80.020.A. In addition to the general requirements for Critical Areas reports referenced above, specific Critical Area report requirements for Erosion Hazard Areas (which are one of the Geologically Hazardous Areas) are provided in ECDC 23.80.050. Note that Stable Erosion Hazard Areas may have limited report requirements at the director's discretion. At a minimum an erosion and sediment control plan prepared in compliance with the requirements in ECDC Chapter 18.30 shall be required. Development is restricted within an Erosion Hazard Area and must meet additional criteria. For erosion hazard areas with suitable slope stability, an erosion and sediment control plan prepared in compliance ECDC 18.30 will be considered to meet the Critical Areas "Study Required" determination. The determination of "suitable slope stability" will be made by both the Planning and Engineering divisions of the City of Edmonds. In areas where the slope stability is not suitable, projects within Erosion Hazard Areas will require a report by a licensed Geotechnical Engineer or other qualified professional. Note that it is important for the report to be prepared by a qualified professional as defined in the ordinance. Report requirements are given in ECDC 23.80.050, and more generally in ECDC 23.40.090.D. Development standards are given in ECDC 23.80.060 and 23.80.070. Lands-11de HazardAireas Development is restricted within a Landslide Hazard Area and its buffer. Projects that will intrude into these areas will require a report by a licensed Geotechnical Engineer. Geologically hazardous areas include areas susceptible to erosion, land sliding, earthquake, or other geological events. They pose a threat to the health and safety of citizens when incompatible development is sited in areas of significant hazard. Such incompatible development may not only place itself at risk, but also may increase the hazard to surrounding development and use. The criteria that are applied depend on the amount that the buffer is reduced. The buffer can be reduced to a minimum of ten (10) feet (with an additional 15' building setback per ECDC 23.40.280) if a report is prepared that meets the standards listed in ECDC 23.80.050). The alteration must also meet the requirements listed ECDC 23.80.060. In addition, proposals to reduce the buffer to less than ten (10) feet must comply with the design standards listed in ECDC 23.80.070.A.3. Development is restricted within a Landslide Hazard Area and its buffer. Projects that will intrude into these areas will require a report by a licensed Geotechnical Engineer. Determination: Studyi This review applies to the entire subject parcel. Depending on the location and project proposed relative to the identified critical areas, certain studies and reports may be required. Please contact the Planning Division at 425.771.0220 if and when you have a specific development proposal for this site in order to discuss the various permits that will be required. Please note that tree removal on sites containing critical areas may first require a tree cutting permit, and the illegal removal of trees may result in penalties and steep fines (ECDC 18.45.070, ordinance #.3828). Kernen Lien, Associate Planner Name, Title Sign August 11, 2011 Date Page 13