9323 OLYMPIC VIEW DR.PDF1111111111111
12693
9323 OLYMPIC
VIEW DR
ADDRESS:
TAX ACCOUNT/PARCEL NUMBI
BUILDING PERMIT (NEW STRU(
COVENANTS (RECORDED) FOR:
l
CRITICAL AREAS: OfI)�1—oil DETERMINATION: []Conditional Waiver Study Required ❑ Waiver
DISCRETIONARY PERMIT #'S: \
DRAINAGE PLAN DATED:
PARKING AGREEMENTS DATED:
EASEMENT(S) RECORDED FOR:_
PERMITS (OTHER):CVIJ7
PLANNING DATA CHECKLIST DATED:
SCALED PLOT PLAN DATED: 811Wg `
SEWER LID FEE $: LID #: 151
SHORT PLAT FILE:Lt.LOT: / BLOCK:
SIDE SEWER AS BUILT DATED:/13/ D0 i-7/23/��
SIDE SEWER PERMIT(S) #: qA gf /6
GEOTECH REPORT DATED:
STREET USE / ENCROACHMENT PERMIT #:
WATER METER TAP CARD DATED:
OTHER:
L:\TEMP\DST's\Forms\Street File Checklist.doc
`12C. t 8Ov
APR 2009
ARY HAAKENSON
MAYOR
CITY OF E1DMON1EX J i
121 5T" AVENUE NORTH • EDMONDS, WA 98020 • 425.771.0220 • FAX 425.771.0221
Website: www.ci.edmonds.wa.us
DEVELOPMENT SERVICES DEPARTMENT
Planning • Building • Engineering
April 8, 2009
Darrin Mock
Chermak Construction Inc.
655 Edmonds Way
Edmonds, WA 98020
Subject: Determination regarding Critical Areas Checklist: CRA20090019
Dear Owner:
Enclosed please find a copy of the Critical Areas Checklist you submitted.
A14
a
The `DETERMINATION" reached by the City is located on the reverse side of the form (bottom of
page). It is very important for you to retain a copy of this critical areas "determination" for vour
records.
Please examine this Determination for additional requirements. You may need to submit
additional information such as an Environmental Checklist or Critical Areas Study.
The Determination for the Critical Areas Checklist you submitted is a site -specific determination,
not a project -specific determination.
YOU MUST SUBMIT A COPY OF THE CRITICAL AREAS CHECKLIST and DETERMINATION WITH
ALL PERMIT APPLICATIONS OR YOUR APPLICATION WILL NOT BE PROCESSED.
Permit applications include the following:
• Building Permits
• Conditional Use Permits
• Subdivisions
• Variances
• Applications to the ADB* Land Use Applications
• Any other development permit applications.
Thank you,
Planning Secretary
*Architectural Design Board
Enc.
c: Strom Peterson & Maria Montalvo
9323 Olympic View Drive
Edmonds, WA 98020
• Incorporated August 11, 1890 •
Sistcr City - Hckinan, Japan
1.0.
r
#P20
•
`ae. t 0"
City of Edmonds
Development Services Department
Planning Division
Phone: 425.771.0220
Fax: 425.77 t .0221
The Critical Areas Checklist contained on this form is to
be filled out by any person preparing a Development
Permit Application for the City of Edmonds prior to
his/her submittal of the application to the City.
The purpose of the Checklist is to enable City staff to
determine whether any potential Critical Areas are, or
may be, present on the subject property. The information
needed to complete the Checklist should be easily
available from observations of the site or data available at
City Hall (Critical areas inventories, maps, or soil
surveys).
Date Received: Q 3 12- 7 12D D I
City Receipt #:
Critical Areas File #: Gp-A 7/0oq o UC
Critical Areas Checklist Fee: $ -
Date Mailed to Applicant: Y A-O9
A property owner, or his/her authorized representative,
must fill out the checklist, sign and date it, and submit it
to the City. The City will review the checklist, make a
precursory site visit, and make a determination of the
subsequent steps necessary to complete a development
permit application.
Please submit a vicinity map, along with the signed copy
of this form to assist City staff in finding and locating the
specific piece of property described on this forma In
addition, the applicant shall include other pertinent
information (e.g. site plan, topography map, etc.) or
studies in conjunction with this Checklist to assistant staff
in completing their preliminary assessment of the site.
The undersigned applicant, and his/her/its heirs, and assigns, in consideration on the processing of the application agrees
to release, indemnify, defend and hold the City of Edmonds harmless from any and all damages, including reasonable
attorney's fees, arising from any action or infraction based in whole or part upon false, misleading, inaccurate or
incomplete information furnished by the applicant, his/her/its agents or employees.
By my signature, I certify that the information and exhibiY herewith submitted are true and correct to the best of my
knowledge and that I am authorized to fil t is applicati n the behalf of the owner as listed
below. �}9
SIGNATURE OF APPLICANT/AGENT DATE `TQ�^�!
Property Owner's Authorization
By my signature, I certify that I have authorized the above Applicant/Agent to apply for the subject land use application,
and grant my permission for the public officials and the staff of the City of Edmonds to enter the subject property for the
purposes of inspection and posting att n to his plication.
SIGNATURE OF OWNER DATE 3- 4 09
PLEASE PRINT CLEARLY
Owner/Applicant:
Street Address 'J r
E &MOILLS t �iA q SCRO
City State Zip
Telephone: -t'�-� Z�]Cj ��--74
Email address (optional):
Applicant Representativ
Name
�OeE6
Street Address T
EAQmc�S t >f\
City State Zip
Telephone: 41S • m k • l � o D
Email Address (optional): (,-Yy
COYv`
N
#P20 0 l
Critical Areas Checklist CA File N°:
Site Information (soils/topography/hydrology/vegetation)
1. Site Address/ Location: � ?j ( �/ � � � `� p , ��UYu �.� 9d�'�o
2. -Property Tax Account Number: Z-b��� p �Spp
3. Approximate Site Size (acres or square feet): AC.'X'e e 3 t
4. Is this site currently developed? yes; no.
If yes; how is site developed? ` 'Acvk
5. Describe the general site topography. Check all that apply.
Flat: less than 5-feet elevation change over entire site.
Rolling: slopes on site generally less than 15% (a vertical rise of 10-feet over a horizontal
distance of 66-feet).
Hilly: slopes present on site of more than 15% and less than 30% (a vertical rise of 10-feet
over. a horizontal distance of 33 to 66-feet).
Steep: grades of greater than 30% present on site (a vertical rise of 10-feet over a horizontal
distance of less than 33-feet).
_ Other (please describe): G
1YX
6. Site contains areas of year-round standing water: l�6 ; Approx. Depth:
7. Site contains areas of seasonal standing water: A16 Approx. Depth:
What season(s) of the year?
8. Site is in the floodway floodplain �� of a water course.
9. Site contains a creek or an area where water flows across the grounds surface? Flows are year-round?
/t//A- Flows are seasonal? (What time of year? ).
10. Site is primarily: forested ;.meadow ;shrubs ; mixed
rb nape% awn, shrubs etc)
11. Obvious wetland is present on site: �d
For City Staff Use Only MWQ -C' .
1. Plan Check Number, if applicable? OJA
2. Site is Zoned?
3. SC5 mapped soil type(s)? �'3-- ��c�z-�.2r.r i c�c- ll. .,rlv Ics 1- #, a5
4. Critical Areas inventory or C.A`.'�ap i
—.1- - t_ 1 _ _ • u
Area on site?
L--.,,, AWidP
5. Site within designated earth subsidence landslide hazard area?
C DETERMINATION
/) STUDY REQUIRED
/ / /' 1"n
WAIVER
•
CITY OF EDMONDS
CRITICAL AREAS RECONNAISSANCE REPORT
Site Location:
9323 Olympic View Drive
Tax Acct. Number:
27031300102500
Determination:
Study Required
Determination #:
CRA-2009-0019
Applicant:
Darrin Mock, Chermak Const. Inc.
Owner(s):
Strom Peterson & Maria Montalvo
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 Landslide Hazard and Erosion Hazard Areas, pursuant to Chapters 23.40 and
23.80 of the Edmonds Community Development Code (ECDC).
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 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 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 through
23.40.140.
STUDY REQUIREMENT — LANDSLIDE HAZARD AREA
It appears that this property contains and/or is adjacent to a Landslide Hazard Area.
• A Landslide Hazard Area is any area with a slope of forty percent (40%) or steeper and with a
vertical relief of ten (10) or more feet (except areas composed of consolidated bedrock).
• Landslide Hazard Areas are further defined and illustrated in ECDC 23.80.020.B.
• In addition to the general requirements for Critical Areas reports referenced above, specific
Critical Area report requirements for Landslide Hazard Areas are provided in ECDC 23.80.050.
DEVELOPMENT PROPOSALS ASSOCIATED WITH LANDSLIDE HAZARD AREAS
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.
0 The criteria that are applied depend on the amount that the buffer is reduced.
f � •
• 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 in 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.
STUDY REQUIREMENT — EROSION HAZARD AREA
It appears that this property contains and/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.
• Any area with slopes of 15 percent or greater and impermeable soils interbedded with granular
soils and springs or ground water seepage.
• Areas with significant visible evidence of ground water seepage, and which also include existing
landslide deposits regardless of slope.
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 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 director's
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 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.
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.
nnifer Machl.
Name
Si
1 7, 2
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.
2
0
O
N
O ,N
NNn �`m
x om�c�a�ra�_E�ca
oVo`_ c o T�Z o E m o m
a�
a N 7 0 Z w •� ` L L U .LO N y
_ T
O N
N > O O O
co V TL a)a)y O N N C 0
>
.0 NE N N�NNc�°M>o.6N E O
yE�Z O°
Nm
a
C Q. f0 y C T C 'NO O N O
N 7 aw N L N CCU
Q CO N U
C O O N . oN O O E O O O T
O' aL U N TILL N� N C
U f6 5.0 o C �.- C N N
t N 0' l0 2 a 2+� E U O
cC N
N C T PL/1 m 0 3 Eb m".L. O
LL
O
W
�O
Q
v-,
0
II
~
O
PLANNING DATA
SINGLE FAMILY RESIDENTIAL
11 STREET FILE
Name:
Date:
Site Address:
Plan Check #: _0
Project Description: Cor.e�r ck aO' lye sleek on s;c%_oP ex�.
�o "pPeck. deck 40
uP ex:s�� Pao
Reduced Site Plan Provided: NO)
Zoning:
Map Page: 25LI
Corner Lot: (YES /0
Flag Lot: (YES / I�
Critical Areas Determination #: CRA'aO!?019
X Study Required — L-a \cN;oj. 4 Nzzz.rd Ares — Geoker-t, re,9m4 6y. GeoGra"p
❑ Waiver d co e
SEPA Determination: Exer,Q
0 Exempt
❑ Needed (for over 500 cubic yards of grading)
❑ Fee ❑ Checklist ❑ APO List with notarized form
Required Setbacks
Street: E\
Side:
Side: S
Rear:
Actual Setbacks D
Street:
Side o ,
Side: S
Rear, \ i*-
J
❑ Detached Structures:
❑ Rockeries:
ElFences/Trellises: Nc�Pi:s�� on
❑ Bay Windows/Projecting Modulation:
Stairs/Deck: of
Buildin Heigh
Datum Point:
Datum Elevation:
Maximum Height Allowed: a /
Actual Height: Lo" -io koP ew
Other
Parking Required:
Parking Provided:
Lot Area, Maximum Lot Coverage: 35% oposed:.
t�otti�2 i � 3i0�'�y ciPt, 4-To4-�$ ra T
Lot Coverage Calculations: � ,s
ADU Created: (YES Cp
Subdivision: LL_ -�p 1
Legal Nonconforming Land Use Determination Issued: (YES
Comments
-�-o \C>-- b -e_ cle— 0-0-
-z%* \O' �fon, koPe�P s�o� �s�e 0-0 (q1
-c>,Ie d Noc-�� weS�- S�•�cam: �-�� -Ia � a d is2%� f- d4ed
,�P,Jj>
S;1 %a' ok @ to
f v
Plan Review By:
Planning Data Form 04-11-06
4 n6
r� f �Kf�l res 70
-CITY OF EDMONDS
89p 19,
Address of Construction:
Property Legal Descriptioi
Owner and/or Contractor:
SIDE SEWER PERMIT
PERMIT I\10
9142
State License No. rn�� ,�1CC���« Building Permit No.
Single Family Invasion into City Right -of -Way: ❑ No IqYes
❑ Multi -Family (No. of Units ) RW Construction Permit No.
❑ Commercial Cross other Private Property: k
No El Yes
El Public Attach legal descriptionand copy of recorded easement
I -certify that I ave read and shall comply with all city requirements
as indicated on tNd back of the Permit Card.
Date
* CALL DIAL -A -DIG (1-800-424-5555) BEFORE ANY EXCAVATION *
OFFICE USE ONLY
* FOR INSPECTION CALL 771-3Z9`t, PUBLr�0
R PT.
Permit Fee: a Issued By
Trunk Charge: Date Issued:— 1 /06
Assessment Fee: Receipt No.: S O'7 Z
Lid No.:'
Partial Inspection: Date Initial
Comments
Reason Rejected: Date Initial
i
Final Inspection Approved: Date 3/a' Initial—C&JCC-110
** PERMIT MUST BE POSTED ON JOB SITE **
White, Copy: File Green Copy: Inspector', Buff Copy: Applicant
Revised 3/90
0
CD
0
V
0
m
m
M
3Im
6
0
Ali
O�
1
l
F
rr
IN
FA
z
M
O
z
a
c
a
0
z
El
z
D
n
—+
z
A
`C
O
�t
m
CL
O
3
2
fA
a
v
n�
co
m
z
0
fl
-TI
z
M
0
z
0
zc
a
A
>
tT,
o
0
z
IA
m
*
0 m
■
;u -1
m
>
Ll
i
I1If Y:YI
I' .• Y n7
1 j � 11n
� m
a
o c
E
V
m
a
r
i1
s z
c
m
tr
V
p N
G
m
�'
i
Q•
p op
1
{
i
1.
FI
ewe
0 C �?
4
t
mm
b
a
E
�_
-�
DC
P
"A
q eT
x
W2
(�
a'
i
?
z A
o
3
i
o y
Vey?
d
s
>
Fz
Lp
E:
C;
o,
d L
O ~ `, C T w C o
V• 0: dL uoS. o
o m a A Gq
' O G Ww�
i} :
ooa
`� 33 M: ri > 0csj
V VI L
W ma Z }J o d yc 5oo
p a iim Cd cM d
0 tt7 y m C O
nB A Vl (fit~ z>o be abdor i
w O p W aj W .� E O GO q " cd.c
a A �j O gm 6 -. o. oad
L
• U N~ iU W L� c ° °� °d ow
Gi
IY�1 CL «m E =: E >
o z �Le3 A A
8 Q m d d C `i 3 ❑ ❑
W r °L' Q w 9 •mom a
Ld o
U W Pi0 VddB�O�dO
ra pF d
a V k i w i I 3 m E N m O A
�7 W 0.z zzz z z ap�' O
A 04
pG WF FFF
zz z zz zz zz z A
o
u 23
0 `� W
d
1
d o
U
U
v d
W ^g 15
O W
O
6)
3 Z. �
O
:o
d
m
5bp
;L
• a N
� ado
;ate
: C •�+
m : u •S
U ,O
.4
o
E.
A
• �t i w %,.lam•` � � ., � �� _ � ,
1 Group Northwest Inc.
August 5, 2009
Jennifer Machuga, Planner
City of Edmonds, Planning Division
121 - 5th Avenue North
Edmonds, WA 98020
Subject: Geotechnical Review, Revised Deck Location
Peterson/Montalvo .Residence
9323 Olympic View Drive
Edmonds, WA
Geotechnical Engineers, Geologists
8 Environmental Scientists
G-2878
Ref: Report titled, "Critical Area Study; :Proposed Deck - Peterson/Montalvo Residence,
9323 Olympic View Drive, Edmonds, WA..," dated May 6, 2009, by GEO Group
Northwest, Inc.
Dear Ms. Machuga:
We understand. the location of the subject wood deck was revised and the deck was constructed
10 feet from the top of the slope. The size of the deck did not change. Based upon our review of
the revised deck plans, the recommendations in the referenced report are stall valid, with no
changes to those recommendations. It is acceptable for the deck to be sited within the building
setback, 10 feet from the top of the slope. Please call if you have any questions.
Sincerely,
GEO Group Northwest, Inc,
Wade J. Lassey
Engineering Geologist
ZAa;�
William Chang, P.E.
Principal
Chg1
ya' QE.,NAsyti G'
A�VfIr
1 pro
H s
9
20114
oKI'Ss�ON A\-�
cc: Mr. Darrin Mock, Chermak Construction
Mr. Strom Peterson, Owner
13240 NE 20th Street, Suite 10 • Bellevue, Washington 98005
Phone 425/649-8757 Fax 425/649-8758
o{ \Nashi
tiZ
O/
"Wade d. Lassey
REtT F ILFW
RE
AUG 05 2009
BUILDING DEPAK J,1- MENT
CITY OF EDMONDS
•
0
Cityof Edmonds BuiJi
lding Department
10
FIAN�
TM
CRITICAL AREAS STUDY
PROPOSED DECK
PETERSON/MONTALVO RESIDENCE
9323 OLYMPIC VIEw DRIVE
EDMONDS, WA
G-2878
Prepared For
Mr. Strom Peterson and Ms. Maria Montalvo
9323 Olympic View Drive
Edmonds, WA 98020
May 6, 2009
an
GEO GROUP NORTHWEST, INC.
13240 NE 20th Street, Suite 10
Bellevue, Washington 98005
Phone: (425) 649-8757
RECEIVED
MAY 1 1 2099
BUILDING DEPARTWP r
CITY OF E1?M0 HISS
STREET FILE
�i-��
1
2XII i Grou
i
May 6, 2009
•
Northwest, Inc.
Mr. Strom Peterson and Ms. Maria Montalvo
9323 Olympic View Drive
Edmonds, WA 98020
Subject: Critical Area Study
Proposed Deck - Peterson/Montalvo Residence
9323 Olympic View Drive
Edmonds, WA
Geotechnical Engineers, Geologists
& Environmental Scientists
G-2878
Ref: City of Edmonds, "Determination Regarding Critical Areas Checklist and Critical
Areas Reconnaissance Report: CRA20090019," dated April 8, 2004.
Dear Mr. Peterson and Ms. Montalvo:
The purpose of this report is to provide an assessment of geologic hazards and assess the
proposed construction of a wood deck in the grass lawn area on the west side of your existing
residence. The house is located approximately 46 feet behind the top of a high steep bluff
overlooking Puget Sound. The proposed deck will be about 280 square feet in size, will be
located approximately 16 feet behind the top of the bluff, and will be constructed low to the
ground.
At the back of this report is a Vicinity Map, Plate 1, illustrating the location of the subject
' property. The location and size of the proposed deck is illustrated on the Site Plan, Plate 2. The
site plan also depicts the top of the steep slope.
According to the Edmonds Community Development Code (ECDC) the subject property is
designated as a critical area with geologic hazards, including. a landslide hazard and erosion
hazard. A critical areas report is being required as part of the submittal for a building permit for
the proposed deck, based on the City of Edmonds, "Critical Areas Reconnaissance Report."
13240 NE 20th Street, Suite 10 Bellevue, Washington 98005
' Phone 425/649-8757 Fax 425/649-8758
' May 6, 2009 G-2878
Critical Areas Study Page 2
Proposed Deck - 9323 Olympic View Drive
' Site Description
As part of this study, GEO Group Northwest, Inc., conducted a site visit on April 8, 2009. The
' subject property is located on the west side of Olympic View drive, approximately as illustrated
on the Vicinity Map, Plate 1. The subject 0.31 acre lot is long and narrow. The western half of
the lot (±) consists of a steep slope (bluff). The slope is heavily vegetated with native deciduous
trees, brush, ferns and vines. At the bottom of the bluff is the Burlington Northern Railroad
right-of-way and Puget Sound. The bluff is approximately 160 feet tall, rising from about
' elevation 20 feet at the railroad, to elevation 180 feet at the top of the slope, as illustrated on the
Topographic Site Plan, Plate 3. The bluff slope has an average gradient of approximately 100
percent (IH:IV).
The existing house is one-story with a daylight basement, was constructed in 1974, and is located
on the relative flat area above the top of the bluff. The west side of the house is located
approximately 46 feet from the top of the bluff. The yard area around the house is vegetated with
ornamental plants, shrubs and lawn grass. A hedge row is located about 10 feet behind the top of
the bank and the area between the house and hedge consists of a grass lawn area. The lawn area
slopes down to the west 3 to 4 feet from the house down to the hedge. The house is connected to
the sanitary sewer.
Proposed Deck
We understand the proposed wood deck will be located in the grass lawn area on the west side of
the house and will be set back approximately 16 feet from the top of the bluff. The dimensions of
the proposed deck are approximately 14 feet by 20 feet and new stairs will connect the new deck
to the existing upper deck located along the west side of the main floor of the house, as illustrated
on the Site Plan, Plate 2. The new deck will be constructed a few feet off the existing ground
surface. The individual deck boards will be spaced and rain water will drip down through the
deck onto the ground below the deck. The deck will not be covered.
GEO Group Northwest, Inc.
May 6, 2009 G-2878
Critical Areas Study Page 3
Proposed Deck - 9323 Olympic View Drive
ASSESSMENT OF GEOLOGIC CHARACTERISTICS
Geology and Soils
According to the area geologic maps, the soils at the top of the bluff are mapped as Till (Qvt) of
the Fraser Glaciation Period, consisting of a poorly sorted, nonstratified lodgement till that is an
extremely compact mixture of clay, silt, sand, pebbles, and cobbles that was deposited as ground
moraine in the upland areas. Soils on the bluff, below the Till, are mapped as Transitional Beds
(Qtb) of the Fraser to Pre -Fraser Glaciation period, consisting of glacial and non -glacial deposits
of clay, silt, and fine to very fine sand. Soils at the base of the bluff, underlying the Transitional
Beds, are mapped as Olympia Gravels (Qog) of the Pre -Fraser Glaciation period, consisting of
stratified, fluvial sand and gravel that is weakly cemented and stands near vertical in cuts.
A subsurface investigation of the site soils (borings, test pits) was not performed. Soils in the
lawn area west of the house were probed with a 1/2-inch steel rod and found to be loose to
medium dense to a depth of 1 to 3 feet and dense below that depth. The loose to medium dense
soils are consistent with weathered till soil.
Hydrology
Glacial till soils are generally naturally weathered to a depth of 2 to 3.5 feet below the ground
surface. Water readily infiltrates into the weathered till soil. The weathered soils are typically
underlain by unweathered till, commonly referred to as "hard pan." The permeability of the
unweathered till is very slow. In the wet months, water commonly collects on top of the
unweathered till and moves laterally on top of the unweathered till as sheet flow. No expressions
of water seepage were observed on the slope below the top of the bluff on the subject property.
' 1 Minard, J. P., 1976, "Geologic Map of the Edmonds East and Part of the Edmonds West Quadrangles,
Washington," Department of Interior, U.S. Geological Survey, Map MF-1541, 1:24,000.
GEO Group Northwest, Inc.
1
' May 6, 2009 G-2878
Critical Areas Study Page 4
' Proposed Deck - 9323 Olympic View Drive
REVIEW OF SITE HISTORY
We reviewed files at the City of Edmonds at the building and planning departments to identify past
records of landslides, critical areas studies, and geotechnical engineering reports for the subject
property and the adjacent properties within 200 feet of the subject property. The files did not
' contain records of previous geotechnical engineering studies, critical areas studies, or contain
records of previous reported landslides. The files reviewed included the Olympic View Drive
property addresses: 18226, 9325, 9323, 9317, 9311, 9309 and the Overlook Park parcel located
between addresses 9325 and 18226.
A letter concerning bank erosion was found for the 18226 address. The letter dated 12/4/2003 by
Don Fiene, Assistant City Engineer, indicated the bank erosion consisted of sloughing on the bluff
below the residence. Drainage recommendations were provided to the property owner to minimize
water infiltration above the bluff.
SLOPE STABILITY EVALUATION
The project site is located some -1.5 miles south of the Meadowdale landslide complex and is not
located in a known active landslide area. The WDOE slope stability map classifies the high bluff
face as unstable. The topography of the slope indicates that historically there has not been incising
into the bluff due to water runoff or springs. From the top of the slope we did not observe current
or recent slope instability, such as soil tension cracks, slumps or slides, for the subject property and
adjacent properties. No groundwater seepage or springs were observed. Vegetation on the bluff
consists of a combination of relatively dense trees, brush, ferns, and vines. In general, the bluff
face appears relatively stable.
2 Tubbs, D. W., Koloski, J. W, October 16, 1979, "Final Report, Landslide Hazard Investigation, .
Meadowdale Area, Edmonds, Washington," Roger Lowe Associates, Inc.
Slope Stability Map, 1979, "Coastal Zone Atlas of Washington, Vol. 5, Snohomish County,"
Washington Department of Ecology.
GEO Group Northwest, Inc.
1
' May 6, 2009 G-2878
Critical Areas Study Page 5
Proposed Deck - 9323 Olympic View Drive
SITE VULNERABILITY EVALUATION
Loose soils on the bluff face have a moderately high risk for localized shallow landsliding
' (slumping and sloughing) primarily due to the steep gradient of the bluff face, natural weathering
and loosening of the surficial soils on the face, and large storm events. These risk factors are
moderated by the favorable geology and hydrologic factors. Vegetation on the slope also helps
strengthen and stabilize the loose surficial layer of soil to reduce the risk of slides. Sloughing was
reported in 2003 on the bluff face four lots to the south but has not been reported on the subject
and adjacent properties, based on our file review. In general, sloughing occurs more frequently
during the wet months when the loose surficial soils are saturated, such as during or following a
large storm event. The depth of the slumping and sloughing will generally be limited to a depth of
6 feet (f). There is a moderately high risk for slumping and sloughing to occur on the bluff face as
a result of a seismic event when the soils are saturated.
The risk appears to be relatively low for deep seated slides to occur based on the site geology, lack
of groundwater seepage, and a lack of recent landslide history. In the event of a slide, the debris
run -out would impact the Burlington Northern Railroad right-of-way. No homes are located below
the bluff. We do not anticipate major slides on the property and do not anticipate the top of the
bluff to retreat.
EROSION HAZARD EVALUATION
' According to the Soil Survey of Snohomish County4, soils along the top of the bluff in the eastern
portion of the property are mapped as Alderwood Urban Land Complex, generally consisting of
' Alderwood gravelly sandy loam (8 - 15 percent slopes, soil #6), that formed in glacial till.
Typically the glacial till hardpan is found at a depth of 20 to 40 inches. Water runoff is slow and
the hazard of water erosion is slight for Alderwood gravelly sandy loam on 8 - 15 percent slopes.
' 4 July 1983, "Soil Survey of Snohomish County Area, Washington," U.S. Department of Agriculture,
Soil Conservation Service.
GEO Group Northwest, Inc.
May 6, 2009 G-2878
Critical Areas Study Page 6
Proposed Deck - 9323 Olympic View Drive
Soils in the western half of the property, below the top of the bluff, appear to also be mapped as
Alderwood Urban Land Complex (soil #6), however it is our opinion that the soil should be
mapped as Soil #4 (Alderwood gravelly sandy loam, 25-70 percent slopes), based on the steepness
of the bluff face. Water runoff is rapid and the hazard of water erosion is high for Alderwood
gravelly sandy loam on 25-70 percent slopes.
DISCUSSION AND RECOMMENDATIONS
Foundation support for the proposed wood deck will require installation of concrete column
footing pads. The column footings will require minimal excavation to install. No other site
grading is planned. The deck boards will be spaced and rain water will drip through down the deck
to the ground surface. The deck will not channel and concentrate water. The infiltration of water
into the ground below the deck will not significantly change from the conditions that were present
prior to the construction of the deck.
The bluff appears to be relatively stable at the project site. Based on the site conditions, it is our
professional opinion that the proposed wood deck will have no perceivable impact on the stability
of the steep slope, will not increase the potential for slides, and will not increase the potential for
erosion. We conclude that the proposed deck will avoid impacts to the geologically hazardous area
and no geological hazards will result from the proposed development either on site or the adjacent
properties.
Minimum Buffer and Building Setback
We recommend the non -disturbance buffer be reduced to 10 feet from the top of the slope for the
purpose of constructing the deck. It is our opinion that construction of the wood deck within the
15 foot building setback is acceptable (uncovered wood decks should be allowed per ECDC
23.40.280).
GEO Group Northwest, Inc.
1 • •
' May 6, 2009 G-2878
Critical Areas Study Page 7
Proposed Deck - 9323 Olympic View Drive
' Geotechnical Recommendations
It is our professional opinion that the proposed wood deck may be constructed as proposed and
' described herein. We recommend the deck be supported on spread footings. Footings should be
supported by medium dense to dense soil to minimize settlement. If loose soil is present, the loose
' soil should be compacted or removed and replaced with compacted fill. We recommend
compacting the soil under the footings with a jumping jack type compactor.
' The following spread footing foundation design criteria is applicable for footings supported as
described above:
' Allowable bearing pressure, including all dead and live loads: = 2,000 psf
' Minimum depth to bottom of perimeter footing below
adjacent final exterior grade (frost protection): = 18 inches
' Minimum lateral dimension of column footings: = 16 inches
• Estimated post -construction settlement: = 1/2 inch
' A one-third increase in the above allowable bearing pressures can be used when considering short-
term transitory wind or seismic loads. Lateral loads can also be resisted by friction between the
foundation and the supporting soils or by passive earth pressure acting on the buried portion of the
foundation. For the latter, the foundation must be poured "neat" against undisturbed medium dense
to dense soil or the surrounding soil be compacted. We recommend a passive pressure (lateral
resistance) of 350 pcf equivalent fluid weight and a coefficient of friction (friction factor) of 0.35.
Erosion Control and Mitigation Recommendations
' We do not recommend installation of erosion and sedimentation control measures, such as the
installation of a silt fence down -gradient from the proposed deck. It is our opinion that burying the
' base of a silt fence into the ground would cause considerable site disturbance and is not needed as
the grass lawn is not being removed and will provide filtration of runoff. The construction of the
' deck should cause minimal site disturbance. No mitigation measures are recommended, with the
GEO Group Northwest, Inc.
May 6, 2009 G-2878
Critical Areas Study Page 8
Proposed Deck - 9323 Olympic View Drive
exception that we recommend not using a plastic sheet ground cover below the deck. If a ground
cover is needed, we recommend the use of a non -woven filter fabric geotextile material, such as
Mirafi 140N, that will allow water to pass through and be absorbed by the underlying soil.
REPORT PREPARATION
The services described in this report were prepared by Mr. William Chang, P.E, senior
geotechnical engineer and principal of GEO Group Northwest, and by Mr. Wade Lassey, a licenced
engineering geologist. Mr. Chang has 30 years of experience as a geotechnical engineer and Mr.
Lassey has been practicing 19 years as an engineering geologist.
LIMITATIONS
This report has been prepared for the specific application to the subject project. The findings and
recommendations stated herein are based on our field observations, our experience, and judgement.
The recommendations contained herein are our professional opinion. No warranty is expressed or
implied. It is understood that constructing on, below, or above a steep slope has inherent risk and
the property owner assumes the risk.
In the event that soil conditions vary during site work, GEO Group Northwest, Inc. should be
notified and the recommendations herein re-evaluated, and where necessary, be revised. GEO
Group Northwest, Inc. should be retained to review the final design plans to confirm the validity of
the recommendations contained in this report if there are significant changes to the project as
described herein.
GEO Group Northwest, Inc.
•
May 6, 2009
' Critical Areas Study
' Proposed Deck - 9323 Olympic View Drive
' Please contact us if you have any questions.
Sincerely,
GEO Group Northwest, Inc.
' Wade J. Lassey
Engineering Geologist
7
���L2� �,� ���oF•WASAiyc G'
�0
co
William Chang, P.E.
Principal 20114 E�
NAL
Attachments:
Plate 1 - Vicinity Map
' Plate 2 - Site Plan
Plate 3 - Topographic Site Plan
cc: Mr. Darrin Mock, Chermak Construction
GEO Group Northwest, Inc.
t
crtair�i�:, cxox�m� �
Made J. Lassey
G-2878
Page 9
-4
T
H!A ' KE
WA
PL
Eel• Group Northwest, Inc.
Geotechnical Engineers, Geologists, &
Environmental Scientists
I I
I SCALE As Shown I DATE 5/6/09
9TH Pi
qW
-7
W:
-190,Fid ST qW,-' i
VICINITY MAP
PETERSON/MONTALVO RESIDENCE
9323 OLYMPIC VIEW DRIVE
EDMONDS, WASHINGTON
INLWE WJL I CHKD WC
807p; 1
Z:
JOB NO. G-2878 J PLATE 1.
I
� 1
0 30' 60'
Approx. Scale: 1 inch = 30 feet
3 i � � � � srsx.. •
1
k
o o
C, t
0 1
" fiL
I
PROPOSED NEW DECK �t '
0
i
TOP OF BANK
I i
I
I �•
I
i
o.
v
A
u
n
d 1
I
I �I
N nil V--4-
SITE PLAN
Group Northwest, Ine. PROPOSED PETERSON/MONTALVO DECK
Geotechnical Engineers, Geologists, & 9323 OLYMPIC VIEW DRIVE
Environmental Scientists
EDMONDS, WASHINGTON
SCALE 1"=30' +/- DATE 05/06/2009 MADE WJL CHKD WC JOB NO. Ci-2878 PLATE 2
N �
p O C
o�w°
. rZw/2xO
QOdN •E�y
75 E
OyZL NfO
N p Q[V
CL
L a Y N N
l0 W N cc>.� >.p O p •�-
�aEo't5a�y aoin��o
T mpm>cwrn*iE
pCc�'ov_i.ocoNiEy
j,d o cv E�y� - o � c—14 �i �-
G 7 0 k N N C C C CL
p C C •y>y -6 �) E ro 0 7
m p 0 G.2 U iN }. y W N O y.>.
tU, C
E p E 'C3 -5 C l` O O li{ C O
r w-0O=OSt ;aa-z EN
c0
c�
4
a
O
:F:
cc
Lc H
o H
`O
�
U)
sa
a
W Cf)
w H
a
Z to o w
b
7
a
o
u
". o E
w
Q
Existln .SL•ru.;%.ure
:y I`rl Nome o�5am Dolly Stzmm
llct'a/ e/eva i<ions MAY Vary s/iPd/y. {ram Jf/iese
fit de t`a eond.fions ex�eriencedO/urils (99Z3 O/j.mP/c YiewQ�ive)
conn 5t`ry c t:on.
• I ,
Zone
Comer. Flag`_
Setbacks
Required Actual
Front
Sides
Rear
Other.
H" t
,a
Gr.ee-S.. 1.t %inc
o
o
�.:
.a
.X
----------------
,.
ara�e°{loot
2L3' .ai d A. .3 f
- - -_
------==I- - --:r��..-'L�
. -
_
Sewer.in lot O/1J�
Finiab aor- own. _
Pin
Line Stake
GE- Elevat,on
- - Sewer m sl`recr'
Tree. at 1.ca.t;on'X"ivil.l be .rem.?ved.(smu!/oo /e).
All 'athe> trees will remvirn undamaged. /p
O Tree
Home ,i�r Ms. Mr,, c/ehn H.M:dpley bn /ot Na. 27 o p /t%noY
f Ma /e
/n Edmonds � {yashino>`•on.
sheet One
Nef: a. S,rvel- Ried�Middle'ton d/lssocietes/Inc:
Layout and Elevafio%76
Fia/dBoo-f 337,p•39,F/%IVP, 4.P2a.
b• Varia ce - C.'ty ar Efrnonds p3o'aroI
/tiiir� 2`es /Vo, !/- /9 -73:
STREET FILE
RECEIVED
APR 15 2011
DEVELOPMENT SERVICES CTR.
CITY OF EDMONDS
f
� n/k e+.e rsoy, mat
Ta ("1444 koe
��L�: �t3Z3 O(�►x,Q►r✓ v� 17r. EdS �� Zo M:�i,r`�wtrn o�' \O� -Troeh
..:.........
a � 2. � J
"Nothing in this pt approval RWI be -
interpreted as. tet:ermi
owing or permit
maintenance of any currently existing illegal, nonconforming or unperbitied building, structure
goer site condition "vh:ch is outsiye the scope of the
buildin ,rmit stru tior,, regardless of whether such
& structure or condition is Shown on the
site plan or drawing. Such building, structure or
condition Inq be the sub'
enforcmeut action." apt of a separate
\\\z 4 7, 9 41
J:
r
4.u0'
r,
Setbacks
}:c-quired
Actual``.
Front E_
1
Sides MIS
10-1 ho't
Rear W
Other
s
0� dvc� 4V 6�
�-
r-
P/ 5� I S 00 w
1
U1,
L.o-F CAE QAIGE
�ovsc - a3tD so �r
�E ckS Sma sQ �T
Datu,„
G�
O ,T
i
N � �
D ;-
9LANN�NG
APPa \r
i/
ck
a., APPROVE® AS NOTE®
REVISED PLAN APPROVE ��� �Rs��
CITY OF EDMONDS BUILDING DIYLS M
49
PLANS EXAMINER
DATE -7 / STREET FEE
- / �z DC
009
tm4n I Me. LVq V� JUL
E_.• y
BUILDING DEPARTMENT.
...:.GITY_OF E(3RAO?d/U$