HomeMy WebLinkAboutBLD2009-00004 UILDING PERMIT APPLICA N MLA09-000002.
Review Type:
Jefferson County Department of Community Development
621 Sheridan Street Port Townsend, WA 98368
PERMIT#: BLD09-00004 Received Date: 1/7/2009
SITE ADDRESS: 270 RHODODENDRON LN
BRINNON, 98320
OWNER: ROYAL A SCHINDLER PHONE: 360-796-4190
VALERIE J SCHINDLER
270 RHODODENDRON LN
BRINNON WA 983209737 KEPHART SHORT PLAT#1
SUBDIVISION: Block: Lot: 1
PARCEL NUMBER: 502151022 Section: 15 Township: 25 N Range: 02 W
CONTRACTOR: OWNER/BUILDER PHONE:
REPRESENTATIVE: PHONE:
PROJECT DESCRIPTIOr STAIRS TO THE BEACH (REPLACEMENT)
TYPE OF WORK NON SQUARE FOOTAGE:
TYPE OF IMP NEW MAIN:
VALUATION 10,000.00 ADD'L: HEAT TYPE:
CODE EDITION: 2006 HEAT BASE: HEAT TYPE:
OCCUPANCY: UNHEATED: #OF STORIES:
OCCUPANCY: OTHER:
CONST TYPE: GARAGE: SHORELINE:
CONST TYPE: DECK: SETBACK:
BANK HEIGHT:
SEWAGE DISPOSAL:
WATER SYSTEM:
BEDROOMS: BATHROOMS:
Exist: 0 Exist: 0
Prop: 0 Prop: 0
Total: 0 Total: 0
Routing Date:
1-1-0C1
Type Amuunt - :i• By: Date: Receipt: Approved/Date
Permit $181.25 LYK 01/07/09 105225 PPRJVEJ Plan Check $117.81 LYK 01/07/09 105225
State Building Code $4.50 LYK 01/07/09 105225 AUG t3 2009
Total: $303.56 Jefferson County Planning
&Building Department
• •
CONDITIONS for Building Permit# :BLD09-00004
1.) A Geotechnical Report was submitted in conjunction with this application. The report
addressed the stability of the geologic hazard area.
2.) The project shall adhere to the Best Management Practices (BMPs) to control stormwater,
erosion and sediment during construction. BMPs shall address permanent measures to
stabilize soil exposed during construction, and in the design and operation of stormwater
and drainage control systems.
3.) A vegetative buffer of 30 feet shall be permanently maintained from the top or edge of the
Landslide Hazard Area, which is between the top of the bluff and the Ordinary High Water
Mark.
4.) Landslide Hazard Areas and their associated buffers shall remain naturally vegetated.
Should buffer disturbance occur during construction, the Unified Development Code
(UDC)Administrator shall require replanting with native vegetation. No alterations shall be
made to the Landslide Hazard Area or its associated buffer without prior authorization by
the UDC Administrator.
5.) Prior to and during approved construction activities, the perimeter of the landslide hazard
area buffer shall be marked with a temporary sign. The sign shall be placed in such a
manner that it can be directly observed from the construction area. The sign shall contain
the following statement: "Landslide Hazard Area and Buffer- Do not Remove or Alter
Existing Vegetation."
6.) All construction activities shall not encroach upon the landslide hazard buffer. This
includes the storage or preparation of materials.
7.) The applicant shall permanently separate the boundary of the Landslide Hazard Area
Buffer from the remainder of the subject property through installing logs, trees, a hedge
row, or any other prominent physical marking approved by the UDC Administrator.
8.) Prior to commencing development activity, proponent is responsible for informing the
Washington Department of Fish and Wildlife (WDFW) in order for WDFW to determine
whether this action is subject to the Washington State Hydraulic Code (Chapter 220-10
WAC). Hydraulic Project Approval (HPA) is required for all hydraulic projects, which are
defined as construction or performance of other work that will use, divert, obstruct, or
change the natural flow or bed of any of the salt or fresh waters of the state.
9.) In addition to Jefferson County permit conditions, the project proponent shall comply with
all conditions set forth by the Washington Department of Fish and Wildlife through
Hydraulic Project Approval.
Jefferson County Building lision ' Permit Ntr: BLD09-00004
Applicant: SCHINDLER
BUILDING PERMIT INSPECTION APPROVALS applicable Code: 2006 International Building Codes
To schedule inspections, call (360)379-4455 no later than 7:Cl0 AM the day of the inspection.
Requests received after 7:00 AM will not be scheduled for that day's inspections.
ELECTRICAL PERMITS are issued by the Washington State Department of Labor& Industries.
The electrical permit must be signed off by the State Inspector prior to the County's Framing Inspection
Inspection Item Date Approval Signature Notes
Setbacks 1
Erosion Control
Framing structural framing report required by engineer
Framing building inspection for code complyance
FINAL INSPECTION yj/ � /4
FINAL INSPECTION MUST BE APPROVED PRIOR TO BUILDING BEING OCCUPIED
THIS PERMIT IS VALID FOR ONE YEAR
a MLA09-0000Z.
•UILDING PERMIT APPLICAN Review Type:
Jefferson County Department of Community Development
621 Sheridan Street Port Townsend, WA 98368
PERMIT #: BLD09-00004 Received Date: 1/7/2009
SITE ADDRESS: 270 RHODODENDRON LN
BRINNON, 98320
OWNER: ROYAL A SCHINDLER PHONE: 360-796-4190
VALERIE J SCHINDLER
270 RHODODENDRON LN
BRINNON WA 983209737 KEPHART SHORT PLAT#1
SUBDIVISION: Block: Lot: 1
PARCEL NUMBER: 502151022 Section: 15 Township: 25 N Range: 02 W
CONTRACTOR: OWNER/BUILDER PHONE:
REPRESENTATIVE: PHONE:
PROJECT DESCRIPTIOr STAIRS TO THE BEACH (REPLACEMENT)
TYPE OF WORK NON SQUARE FOOTAGE:
TYPE OF IMP NEW MAIN:
VALUATION 10,000.00 ADD'L: HEAT TYPE:
CODE EDITION: 2006 HEAT BASE: HEAT TYPE:
OCCUPANCY:
OCCUPANCY: UNHEATED: #OF STORIES:
CONST TYPE: OTHER: SHORELINE:
CONST TYPE: GARAGE: SETBACK:
DECK. BANK HEIGHT:
SEWAGE DISPOSAL:
WATER SYSTEM:
BEDROOMS: BATHROOMS:
Exist: 0 Exist: 0
Prop: 0 Prop: 0
Total: 0 Total: 0
Routing Date: 7
M
Type A tIcrtmt-Paid Bv: Date: Receipt: Approved/Date
Permit $181.25 LYK 01/07/09 105225 APPROVE[
Plan Check $117.81 LYK 01/07/09 105225
State Building Code $4.50 LYK 01/07/09 105225 AUG i3 2009
Total: $303.56 Jefferson County Planning
&Building Department
11
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CONCEPTUAL VIEW OF STAIR �•, d..—..d,.-......,
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cd. JEFFERSONCOUNTY •
rf.A3 DEPARTMENT OF COMMUNITY DEVELOPMENT
`') '� 621 Sheridan Street • Port Townsend • Washington 98368
Is>
360/379-4450 • 360/379-4451 Fax
-' p www.co.jefferson.wa.us/commdevelopment
Master Permit Application MLA: nq - 1
Project Description(include separate sheets as necessary): * G hsr7 Sep 14c,4 0E3 -23 S-
Tax Parcel Number: 5 0 Z f 5 !O Z 2- Property Size: /,5- 6q S ,t (acres/square feet)
Site Address and/or Directions to Property:
272 odoIeiid-6-rr Lh (G'1.Ac.-.. f4a.Z'i�tr- innar7 , ZeG y "c..d
Property Owner(s)of Record: /2oy-IA-t_ * 1JAL4- i-z, - r. __1(j--A,/B /?
Telephone: 0/0 0- 794 -.4 143 e, Fax: I.0-7 9 L.- 31 ZZ- email: Sc.A/h cr/evpa ucw,/
Mailing Address: 2"70 1Qh Iocitr-rdr ,7 Ln / g-rnnos..r lVQ fr3z0 CI 1)Lar a%f.rz�iri
Applicant/Agent(if different from owner): /
Telephone: Fax: email:
Mailing Address:
Wrat kind of Permit? (Check each box that applies
Building ❑ Critical Areas Stewardship Plan
❑ Demolition Permit ❑Variance(Minor, Major or Reasonable Economic Use)
❑ Single Family ❑ Garage Attached/Detached ❑ Conditional Use[C(a), C(d),or C]**
❑ Manufactured Home ❑ Modular ❑ Discretionary"D"or Unnamed Use-Classification
❑ Commercial* 0 Special Use(Essential Public Facilities)**
O Change of Use 0 Boundary Line Adjustment I n n: _
❑ Address ❑ Road Approach 0 Short Plat** 7 2Q��
❑ Home Business ❑Cottage Industry 0 Binding Site Plan**
❑ Propane ❑Long Plat**
❑ Sign ❑Planned Rural Residential Development(PRRD)/Amendments**
❑Allowed"Yes"Use Consistency Analysis ❑ Plat Vacation/Alteration**
❑ Stormwater Management ❑Shoreline Master Program Exemption/Permit Revisions**
❑Site Plan Approval Advance Determination (SPAAD)* ❑Shoreline Management Substantial Development**
❑Temporary Use ❑Shoreline Management Variance
❑Wireless Telecommunication* ❑ Comprehensive Plan/UDC/Land Use District Map Amendment
❑ Forest Practices Act/Release of Six-Year Moratorium 0 Jefferson County Shoreline Master Program Amendment
*May require a Pre—Application Conference ❑Tree Vegetation Request
`*Requires a Pre-Application Conference
Please identify any other local, state or federal permits required for this proposal, if known:
DESIGNATION OF AGENT
I hereby designate to act as my agent in matters relating to this application for permit(s).
OWNER SIGNATURE Date:
By signing this application form,the owner/agent attests that the information provided herein,and in any attachments, is true and correct to the best of
his,her or its knowledge. Any material falsehood or any omission of a material fact made by the owner/agent with respect to this application packet
may result in this permit being null and void.
I further agree to save, indemnify and hold harmless Jefferson County against all liabilities,judgments,court costs,reasonable attorney's fees and
expenses which may in any way accrue against Jefferson County as a result of or in consequence of the granting of this permit.
I further agree to provide access and right of entry to Jefferson County and its employees,representatives or agents for the sole purpose of application
review and any required later inspections. Staffs access and right of entry will be assumed unless the applicant informs the County in writing at the
time of the appligatis Ait he r s s prior ice.
Signature: a �a77aZI Date: -7
The action or actions Applicant will undertake as a result of the issuance of this permit may negatively impact upon on or more threatened or
endangered species and could lead to a potential"take"of an endangered species as those terms are defined in the federal law known as the
"Endangered Species Act"or"ESA."Jefferson County makes no assurances to the applicant that the actions that will be undertaken because this
permit has been issued will not violate the ESA. Any individual,group or agency can file a lawsuit on behalf of an endangered species regarding your
action(s)even if you are in compliance with the Jefferson County development code.The Applicant acknowledges that he,she or it holds individual
andg non-transfer � on ibility f ��� complying with the ESA. The Applicant has read this disclaimer and sign and dates it below.
Signature:_ [�`, Date: /l 7/ 0
G:\PermitCenter\###FOAMS###\DRD FORMS\Master Permit Application 5-29-08.doc
• BUILDER STATEMENT •
The signer of this statement does hereby certify that they are the Owners of the parcel referenced herein,that they are not licensed contractors and that
they will be ass . the re errsibil ty of the General Contractor for the proposed project.
Signature: J Date: / �, a7
GENERAL CONTRACTOR OR MANUFACTURED HOME INSTALLER: HONE: FAX:
( ) ( )
MAILING ADDRESS: EMAIL:
CONTRACTOR'S LICENSE WAINS
NUMBER: NUMBER
ARCHITECT/ENGINEER: PHONE ( ) FAX:( )
MAILING ADDRESS: EMAIL
Project Type: Frame Type: Bathrooms: Shoreline: Type of Sewage Disposal:
❑ New ❑ Wood Existing: ❑ Sewer
❑ Addition 0 Steel Proposed: Bank ❑ Community System
O Alteration/Remodel 0 Concrete Total: Height: ❑ Individual System
❑ Repair 0 Masonry SEP Permit#
❑ Demolition ❑ Other: Bedrooms: Water Supply:
Existing: Setback: ❑ Private well ❑ Two Party
Type of Heat: Proposed: 0 Public
Total: Name of System:
If this is a Commercial Project you must answer the following:
Number of Parking Spaces: Current: Proposed: Number of ADA Parking Spaces:
Number of occupants(includes owners,tenants,employees,etc) Current Proposed
IBC Occupancy: IBC Type of construction: Will you have Food Service? Yes / No
If this is a Propane Tank and/or Appliance Installation permit,mark all items below that apply:
i Underground Tank I Above ground Tank Size of Propane Tank:
i Heat Stove I Cook Stove i Woodstove i Fireplace Insert I Hot Water Tank i Pellet Stove i Other
Is this appliance being installed in a Manufactured/Mobile Home? Yes / No
When applying for a permit to install a propane tank you must also submit a site plan showing all of the buildings,all property
lines, tank location and size,distances from the propane tank to all property lines,buildings and septic system components,
including the reserve area.
. t'
Square Footage Current Proposed .for;Office Use Only, . AmoUnt Revision,= ,
Main Floor Heated EH Bld App Review:
2"0 Floor Heated Consistency Review: --5- —
Other Heated Base fee: '�7 I 05
Mezzanine Additional Section: x—_--.
Heated Basement Plan Check fee: —]
I I �S
Unheated Basement State Surcharge fee:
Other Unheated Pot Water Review fee:
Garage/Carport SUBTOTAL D n
Decks 911/Rd Approach fee: _____---
Other TOTAL: $Lifc0
Receipt Number: 105225
Cash/Check Number: '
ESTIMATED COST(REQUIRED) Date:
.Fair marked value of all labor and materials foundation to finish �-
/0) �e>a Initials: �1
. c_. _
D
G:\PermitCenter\###FORMS###\DRD FORMS\Master Permit Application 5-29-08.doc
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LANDSLIDE EVALUATION FOR EMERGENCY REPAIRS
Prepared For the Schindler Residence
April 16, 2008
For the Property Located at
270 Rhododendron Lane
Brinnon, WA
Section 15, Township 25 North, Range 2 West, W.M.
Jefferson County, Washington
Prepared by
NTI Engineering and Surveying
717 S. Peabody Street
Port Angeles, Washington 98362
Phone 360-452-8491 F 360-452-8498
Web Site www.riti4u.com=ax
E-mail info@nl.i4u.com
• s . - .
Landslide Evaluation for Emergency Repairs
270 Rhododendron Lane, Brinnon, WA
April 16, 2008
Bud & Val Schindler
270 Rhododendron Lane
Brinnon, WA 98320-9737
Subject: Landslide Evaluation for Emergency Repairs at 270 Rhododendron Lane,
Brinnon, WA
Dear Mr. & Mrs. Schindler:
Background
At your request, NTI Engineering and Surveying (NTI) conducted an evaluation of a
landslide that occurred on the high marine bluff at your property during the winter of
2007-08. The purpose of this evaluation was to determine the cause of the landslide
and to recommend emergency repair measures to improve the stability of the bluff and
mitigate future landslides. The evaluation consisted of research of available literature
and geologic maps of the area, a review of previous geotechnical reports for nearby
properties completed by NTI and a site visit for visual observations made on April 2,
2008.
Site Description
The subject "high bank,1 waterfront property is located at 270 Rhododendron Lane off of
Highway 101 south of Brinnon. The property overlooks Hood Canal to the east and is
bounded on the north and south by residential property and on the west by
Rhododendron Lane (Figure 1).
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M J]S VC.1Qy'bj:..L .Lb»:ytcta!Schms 615 - -• •.., .. _ . ,•
1
• •
The house was built in 1983 and is located approximately 24' to 30' back from the edge
of the bluff; however, the bluff is undermined by approximately a couple of feet or so.
The bluff is approximately 50' high and has average slope angles ranging from 40 to 65
degrees from the horizontal (Figure 2).
,-.;.i,4,.,7.--' V' 42' ' ; -- , -=4,-44:-..1' ',.''1::''', 1:1- '''''''' ' it / -,,,-1-.-- -
,.-.:1,, . , ,,, 7,,,,if,,,z4,:#,,,,- ,--a't7 ..', ,'....4"C. -, ' i ..A1*-4::It*
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Figure 2 ti
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This slope angle is steeper than the typical "angle of repose". The typical "angle of
repose" is defined as the maximum slope or angle at which loose, cohesionless material
remains stable and commonly ranges between 33 and 37 degrees on natural slopes.
The landslide involved almost the entire width of the property and was approximately
three to five feet thick. It stripped almost all of the vegetation off of the bluff face from
near the top of the bluff, to the beach (Photo 1).
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tiliir"VI V fly ‘,441\. .4''''''',1' • .1/,',$,A\. .:::lat,-N' 'V.;L.,,5--
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Photo 1
2
• •
The vegetation along the top of the bluff was spared but was undercut, and some of the
trees near the toe of the bluff were spared. However, some of the trees that are still
standing at the toe may have been carried down the bluff in the slide debris. Frequently,
trees that have been disturbed like this will die due to root damage. The existing beach
access stairs and landing at the beach were destroyed by the slide. No seeps or springs
were observed on the bluff; however, erosional rills and gullies were present indicating
that water has flowed over the top of the bluff. The exposed soil on the bluff face
consisted of predominantly clean sand with occasional layers of sandy gravel, with a
layer of till at the top of the bluff. The sandy soil raveled readily as the bluff face was
traversed.
Site Geology
The Washington State Department of Ecology's Coastal Zone Atlas, 1978 maps the
soils in the area of the subject property as Vashon till (Qvt) at the top of the slope and
underlain by Vashon advance outwash (Qva). The till is described as a very compact
mix of poorly sorted, nonstratified gravel, sand, silt and clay with occasional boulders.
This soil is excellent for foundation stability, good for seismic stability, and stands in
steep natural and cut slopes for long periods. It may ravel and spall by wetting and
drying, and freezing and thawing.
The advance outwash is described as well stratified, well sorted sandy pebble to cobble
sized gravel. In some places, sand predominates. This soil is good for seismic stability
and good to excellent for foundation stability, but may be poor on slopes that approach
the angle of repose of the material. This soil is generally stable in slopes up to the angle
of repose, and may stand in steeper slopes for short periods. The "angle of repose" is
defined as the maximum slope or angle at which loose, cohesionless material remains
stable, and commonly ranges between 33 and 37 degrees on natural slopes.
The Department of Ecology's "Geology and Ground-Water Resources of Eastern
Jefferson County, Washington" map of the soils in the area of the subject property is
generally consistent with the Coastal Zone Atlas descriptions.
According to the Soil Survey of Jefferson County Area, Washington (United States
Department of Agriculture, 1975), the site surface soils are mapped as HoC —
Hoodsport very gravelly sandy loam. This soil formed in glacial till, becomes very hard
at a depth of 20 to 36 inches and has a perched water table above the hard pan during
the rainy season.
Visual observations made at the site are consistent with the above soil descriptions.
Mechanics of Bluff Recession
There are many forms of bluff recession that occur in the coastal regions of northwest
Washington. Common processes include the erosion of the toe of the bluff by wave
3
• •
action, and the resultant sloughing of upper bluff soils due to being undermined and
over steepened. Landslides also frequently occur during the winter due to over
saturation of the bluff soil. These processes seem to be occurring at the subject
property and triggered the landslide.
When waves attack the toe of an unprotected bluff, the lower bluff soils are eroded
away. Eventually, this erosion will undermine and/or oversteepen the bluff to a point
where the soil can no longer support itself at such a steep angle. Then the overlying
bluff soils will slough off, depositing material at the toe of the bluff. This will have the
effect of temporarily reducing the angle of the toe of the bluff to a more stable angle.
The upper bluff may slide to a less steep and more stable angle, or it may stay at a
relatively steep angle. The slide debris that gets deposited at the toe of the bluff will
protect the toe from wave erosion until it is eventually eroded away by waves, and the
bluff undermining process will start over again. Accelerated toe erosion occurs more
often in the winter when the tides are generally higher, and the storm waves larger.
Likewise, many of the upper bluff landslides that occur in our region happen in the
winter or spring when the ground is saturated with water, and especially after heavy
rainfall events. When the soil becomes saturated, there is a decrease in the cohesion
between the soil grains and an increase in the pore-water pressure. This condition can
trigger landslides and debris flows on slopes. Often, there will be an impermeable soil
layer part way down the bluff, which prevents the downward migration of groundwater
and causes the water to migrate laterally, exiting the bluff above the impermeable layer.
Surface runoff flowing over the top of the bluff and down the face can also cause
erosion and damage vegetation on the bluff. For this reason, it is important to control
on-site drainage and runoff in order to minimize negative impacts to the bluff. It is also
important to maintain vegetation on the bluff face, where possible, in order to reduce
erosion of the bluff soils.
Conclusions and Recommendations
Based upon our evaluation, it is our conclusion that the slide was triggered by a
combination of the processes described in the preceding section. Left unchecked, it is
our opinion that periodic slides will continue, and eventually threaten the home. Future
landslides may also devalue the property. In the interest of mitigating the effects of
future slides and preserving the value of the property, we recommend action be taken to
stabilize the bluff as much as possible.
While it may be technically possible to stabilize the bluff to such a degree that future
slides are all but eliminated, it may not economically feasible. This approach would
likely entail a series of several retaining walls from the toe to near the top of the bluff. A
more economical, and also correspondingly less effective approach, would be to install
a retaining wall at the toe and maybe a second wall above the first (Figure 3, in
Appendix). This coupled with drainage improvements at the top of the bluff and re-
establishment of vegetation on the bluff would likely mitigate the erosional processes
that are contributing to the slides and slow down the bluff recession. This work should
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be considered an emergency repair with the goal of being completed prior to the next
rainy season.
It is our understanding that the neighboring property to the north experienced a similar
landslide in December of 2003 when storm waves and higher than normal tides
severely eroded the toe of the bluff. At some point prior to the slide, soft-type armoring
consisting of logs anchored to the beach had been installed. This system failed to
prevent the erosion and emergency repairs were performed which included the
construction of a rock bulkhead to replace the logs.
Toe Revetment: Hard-Type Recommended
We recommend a hard type bulkhead such as concrete or rock for the bluff toe
protection. If a second bulkhead in constructed above the first one, it would probably
need to be a pile and lagging type wall with tieback anchors. The retaining walls could
also be designed to provide support for the reconstructed beach access stairs.
Retaining — Revetment Structure Criteria
The actual design of the retaining wall is beyond the scope of this evaluation, but these
guidelines should be followed:
• The lower retaining wall should extend the entire width of the property or as far
as economically possible and should be on the order of four to five feet high.
• Ideally, the wall would be of such height as to prevent storm waves from
overtopping the wall.
• Rock should be of a large enough size to remain in place during the worst storm
wave conditions (on the order of 4' diameter).
• The ends of the wall should be keyed into the slope to resist wave erosion
around the wall. The wall should also be buried deep enough to resist
undermining (on the order of 4'-5').
• It would be best to have no gap between the new wall and the existing wall to the
north.
• The wall should be sufficiently chinked from behind with large granular material
so that the backfill soil does not wash out through the wall. Filter fabric could be
utilized between the native sandy soil and the coarse backfill to further reduce
the potential for material to be washed through the wall. Any imported wall
backfill material should be free draining granular material.
• For concrete walls, proper wall drainage should be incorporated so that
hydrostatic forces behind the wall do not develop or else the wall should be
designed to handle such forces.
NTI's Geotechnical and Structural Engineering group can design the retaining wall if
desired.
5
• •
Drainage Considerations
With regards to drainage from above, there is an existing tightline drain at the north end
of the property, but the roof drain at the southeast corner of the house runs to the top of
the bluff and is discharged there. It is recommended that this drain and any other drains
be additionally tightlined down the bluff to just above the ordinary high water mark, or
they should be connected to the existing tightline drain. We also recommend that a
shallow swale be constructed across the top of the bluff to intercept any surface runoff
and prevent it from flowing over the top of the bluff. This water from this swale could
also be routed to the existing tightline drain. If a curtain drain is installed in lieu of a
swale, it should not be dug so deep as to penetrate through the till layer and into the
underlying sand. If this occurred, the water would likely be transmitted downward
through the pervious sand rather than be captured in the drain.
The bluff face is currently almost completely devoid of vegetation. The bluff is steep and
the soils are sandy. It is anticipated that establishing good vegetative cover on the bluff
will be challenging. However, anything that can be done to promote vegetation growth
on the bluff face should be attempted. Low growing, deep rooted drought tolerant
species would be the best choice. Please see the DOE publications included with the
original of this report for further information on slope stabilization using vegetation.
Tree Removal Recommended
There are two large fir trees at the top edge of the bluff near the north end of the
property. Due to bluff erosion, these trees are severely undercut. If they fall over or are
blown over in a windstorm, they would wrench the root base out of the soil and leave a
large disturbed area removing several feet of bluff. The trees are also tall enough that
they would hit the house if they fell towards it. We recommend that these trees be
removed, ideally with the trunks left in place so that the roots can continue to provide
support to the bluff soils until they rot. It would be best to have the trees removed from
above and not let them fall down the bluff, as the damage to the remaining bluff
vegetation would likely be considerable.
For further information please review the three publications (included with the original of
this report) published by the Washington State Department of Ecology (DOE) entitled:
"Slope Stabilization and Erosion Control Using Vegetation", "Vegetation Management: A
Guide for Puget Sound Bluff Property Owners" and "Surface Water and Groundwater on
Coastal Bluffs". These publications can also be viewed on the DOE website at:
http://www.ecy.wa.gov/biblio/sea.html under the 1993 and 1994 year heading. The DOE
website also contains additional useful information regarding slope stability and site
development; this reference is highly recommended.
Limitations
This report has been prepared for your exclusive use in conjunction with the above
referenced project. The report has not been prepared for use by others or for other
6
• •
locations. It may be used for other purposes only with the expressed written permission
of the Engineer.
Within the limits of scope, schedule and budget, this report was prepared in general
accordance with accepted professional engineering and geological principles and
practices in this or similar localities at the time the report was prepared. No other
warranty, expressed or implied, is made as to the conclusions and professional advice
included in this report either express or implied.
The observations, conclusions and recommendations presented in this report were
based on our visual observations of the subject property at the time of our site visit; no
laboratory tests were performed. Soil and geologic conditions can vary significantly
between test holes and/or surface outcrops. If there is a substantial lapse of time,
conditions at the site have changed or appear different than those described in this
report, we should be contacted and retained to evaluate the changed conditions and
make modifications to our report if necessary.
Sincerely,
NTI Engineering and Surveying
As,S. Lis..0i
Steve S. Luxton, MSc. PE
Civil Engineer
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Bill Payton, L.E.G. a$fr;�,
Engineering Geologist 4'`.3'ro`
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William C. Payton Jr.
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