CA-08-0013 Erosion.pdf
CITY OF EDMONDS
CRITICAL AREAS RECONNAISSANCE REPORT
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Site Location: 17016 74 Avenue West Tax Acct. Number: 00513100012206
Determination: Study Required Determination #: CRA-2008-0013
Applicant: Michael L. Hathaway Owner: Michael L. Hathaway
CRITICAL AREAS RECONNAISSANCE REPORT: STUDY REQUIRED
During review and inspection of the subject site, it was found that the site contains and/or is
adjacent to critical areas, including Geologically Hazardous Areas, pursuant to Chapters 23.40 and
23.80 of the Edmonds Community Development Code (ECDC).
The subject parcel slopes east to west towards Puget Sound. According to the Citys LIDAR date,
the steepness of the slope varies from approximately 25% to nearly 40%. There is a water feature
which essentially follows the fall line west of the current residence leading off-site but field
observation confirmed that the feature appeared to be a drainage ditch rather than a stream.
GENERAL CRITICAL AREAS REPORT REQUIREMENTS
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 to submit the entire study with your specific development application.
Please review the minimum report requirements for all types of Critical Areas that are listed
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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
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in the ordinance. There are options on how to complete a critical areas study, and there is
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
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through 23.40.140.
STUDY REQUIREMENT EROSION HAZARD AREA
It appears that this property contains or is adjacent to an Erosion Hazard Area. Erosion Hazard
Areas include:
Those areas with Alderwood and Everett series soils on slopes of 15 percent or greater.
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Any area with slopes of 15 percent or greater and impermeable soils interbedded with
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granular soils and springs or ground water seepage.
Areas with significant visible evidence of ground water seepage, and which also include
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existing landslide deposits regardless of slope.
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DEVELOPMENT PROPOSALS ASSOCIATED WITH EROSION HAZARD AREAS
Development within an Erosion Hazard Area must meet additional criteria.
For erosion hazard areas with suitable slope stability, the only critical area study needed is
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an erosion and sediment control plan prepared in compliance with the requirements set
forth in Chapter 18.30 ECDC as part of the construction documents. This option is at the
directors discretion, per Edmonds Community Development Code section 20.80.050.G.
In areas where the slope stability is not suitable, projects within Erosion Hazard Areas will
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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
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23.40.090.D.
Development standards are given in ECDC 23.80.060 and 23.80.070.
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ALLOWED ACTIVITIES
Certain activities are allowed in or near critical area buffers as specified in ECDC 23.40.20. If you
have any questions about whether your proposed development qualifies as an allowed activity,
please contact a Planner for more information.
EXEMPT DEVELOPMENT PROPOSALS
Certain development proposals may be exempt from Critical Areas Requirements (ECDC
23.40.230). If you think that a specific development proposal may be exempt, contact a Planner
for more information.
Michael Clugston, Planner February 20, 2008
Name Signature Date
NOTE: Cited sections of the Edmonds Community Development Code (ECDC) can be found on
the City of Edmonds website at www.ci.edmonds.wa.us.
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