HomeMy WebLinkAboutBLD2008-00077 1116
MLA08-00082
UILDING PERMIT APPLICA ION Review Type: I
Jefferson County Department of Community Development
621 Sheridan Street Port Townsend, WA 98368
PERMIT #: BLD08-00077 Received Date: 2/26/2008
SITE ADDRESS: 180 FOREST DR
BRINNON, 98320
OWNER: STANLEY HUME PHONE: 360-796-3168
PHYLLIS HUME
180 FOREST DR
BRINNON WA 983209614 WILLIAMS ADDITION
SUBDIVISION: Block: Lot:
PARCEL NUMBER: 932900105 Section: 31 Township: 25 N Range: 02 W
CONTRACTOR: WEBER CONSTRUCTION PHONE: (360)385-5204
RAY WEBER
4554 LOPEZ AVE
PORT TOWNSEND WA 98368
Contractor's License WEBERC`0330D Expires 11/29/2008
REPRESENTATIVE: PHONE:
PROJECT DESCRIPTIOP NEW RETAINING WALL / GABION WALL FOR SLIDE REPAIR
TYPE OF WORK NON SQUARE FOOTAGE:
TYPE OF IMP NEW MAIN:
VALUATION 30,000.00 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: Exist:
Prop: Prop:
Total: Total:
Routing Date: aJLi
Type Amount Paid By: Date: Receipt: AI owed/Date
Permit $441.75 CJZ 02/25/08 96959 PROVED
Plan Check $287.14 CJZ 02/25/08 96959
State Building Code $4.50 CJZ 02/25/08 96959
Department
APR �1 200i�
Je
Total: $733.39Jefferson County Planning
&Building
.;afferson CountyBuilding •!
Division Permit •
Number: BLD08-00077
Applicant: HUME
CUILDING PERMIT INSPECTION APPROVALS applicable Code: 2006 International Building Codes
To schedule inspections, call (360)379-4455 no later than 7:00 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
Drywell/Alt Drainage PRIOR TO FINAL SEE CONDITION# 1,2&3. ‘4%
FINAL INSPECTION 5_2(0_0
FINAL INSPECTION MUST BE APPROVED PRIOR TO BUILDING BEING OCCUPIED
THIS PERMIT IS VALID FOR ONE YEAR
•
CONDITIONS for Building Permit# :BLD08-00077
1.) THE PROJECT SHALL CONFORM WITH ALL CONCLUSIONS AND
RECOMMENDATIONS AS FOUND IN THE GEOTECHNICAL REPORT PREPARED BY
STRATUM GROUP DATED APRIL 7, 2008. A COMPLETE GEOTECHNICAL REPORT
IS ON FILE AT THE JEFFERSON COUNTY DEPARTMENT OF COMMUNITY
DEVELOPMENT (MLA08-00082).
2.) PRIOR TO FINAL INSPECTION, THE PROJECT PROPONENT SHALL SUBMIT AN
ORIGINAL LETTER FROM THE GEOLOGIST WHO PREPARED THE GEOTECNICAL
X REPORT DATED APRIL 7, 2008. THE LETTER SHALL CONFIRM THAT THE
STRUCTURES HAVE BEEN CONSTRUCTED IN CONFORMANCE WITH THE
REQUIREMENTS OF THE "GEOTECHNICAL REPORT." THE LETTER SHALL BE
STAMPED BY THE LICENSED GEOLOGIST/ENGINEER.
3.) PRIOR TO FINAL INSPECTION, THE PROJECT PROPONENT SHALL SUBMIT AN
ORIGINAL LETTER FROM ADA ENGINEERING STATING THAT THE STRUCTURES
HAVE BEEN CONSTRUCTED IN CONFORMANCE WITH THEIR DESIGN. THE
LETTER SHALL BE STAMPED BY THE LICENSED ENGINEER.
4.) To help prevent seawater from intruding landward into underground aquifers, all new
development activity on Marrowstone Island, Indian Island and within 1/4 mile of any
marine shoreline shall be required to infiltrate all stormwater runoff onsite.
5.) This proposal is for a new retaining wall/gabion wall for landslide repair. No groundwater
withdrawal is proposed. If the proposal changes to include groundwater withdrawal, the
applicant shall meet all of the Critical Aquifer Recharge and SIPZ conditions.
6.) A vegetative buffer of 30-feet shall be permanently maintained from the top or edge of the
Landslide Hazard Area. All buffers shall be measured perpendicularly from the top of the
Landslide Hazard Area.
7.) 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.
8.) 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."
9.) All construction activities shall not encroach upon the landslide hazard buffer. This
includes the storage or preparation of materials.
10.) 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.
11.) The project shall adhere to the Best Management Practices (E3MPs) 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.
12.) The project shall comply with Construction Stormwater Pollution Prevention (SWPP)
Elements#1 through #12 of the Department of Ecology's Stormwater Management
Manual for Western Washington 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 arid drainage control systems.
•
13.) Outdoor residential storage shall be maintained in an orderly manner and shall create no
fire, safety, health or sanitary hazard.
14.) Not more than 2 unlicensed vehicles shall be stored on any lot unless totally screened
from view of neighboring dwellings and rights-of-way. Such screening shall meet all
applicable performance and development standards specific to the district in which the
storage is kept, and shall be in keeping with the character of the area. Screening shall
meet the requirements of Chapter 18.30 JCC. Outdoor storage of 3 or more junk motor
vehicles is prohibited except in those districts where specified as an autormobile wrecking
yard or junk (or salvage)yard and allowed as a permitted use in Table 3-1 or Chapter
18.18 JCC, and such storage shall meet the requriements of JCC 18.20.100, Automobile
wrecking yards and junk (or salvage) yards. In no case, shall any such junk motor
vehicles be stored in a critical area.
15.) This parcel is within a no shooting area per JCC 8.50.
16.) Pre-existing legal lots of record less than one acre in size in rural residential districts are
subject to the stormwater requirements in Chapter 18.30 JCC and must meet the "Area of
Impervious Surface Coverage" to the maximum extent practicable as determined by the
administrator. Lot coverage is defined as amount of impervious surface, which includes
rooftops, driveways, concrete, etc.
-/-
• 4�gyoN cow JEFFERS COUNTY •
W ti- DEPARTMENT OF COMMUNITY DEVELOPMENT
in .=' '� 621 Sheridan Street• Port Townsend • Washington 98368
360/379-4450 • 360/379-4451 Fax
•4s ING�•
o www.co.jefferson.wa.us/commdeveloprnent
Master Permit Application _ MLA: 1`ti l I % C .�
Project Description(include separate sheets as necessary): 21-1
_-
Emergency Storm/Flood Damage Pr oa,r
Tax Parcel
Number: 932-900-120/9 3) • 100 . I Or") Pro Size:
_ (acres/square feet)
Site Address and/or Directions to Property: 180 Forest Drive, Brinnon, Washington/151 Forest Drive, Brinnon,Washington
Property Owner(s)of Record: Stanley F.Hume and Phyllis K.Hume/June G Holt-Trustee(Douglas Holt,Testamentary Trust)
Telephone:360.796.3168/425.228.6067 Fax: 360.779.4489/425.859.4403 email: June@holtofficesystems.com/
Mailing Address: 180 Forest Drive,Brinnon,WAshington 98320
Applicant/Agent(if different from owner):
Telephone: Fax: _ email:
Mailing Address:
What kind of Permit?(Check each box that applies /.Zr/n e i jcncc' 5tcv m/r/ec' _J Lnuzc y
❑Building Variance(Minor, Major or Reasonable Economic Use)
❑ Demolition Permit ❑Conditional Use[C(a),C(d),or C]**
❑Single Family ❑Garage Attached/Detached ❑Discretionary"D"or Unnamed Use Classification
❑ Manufactured Home ❑ Modular ❑Special Use(Essential Public Facilities)**
❑ Commercial* El Boundary Line Adjustment
❑ Change of Use ❑Short Plat**
❑ Address ❑Road Approach ❑Binding Site Plan**
❑Home Business ❑Cottagelndustry ❑Long Plat**
❑Propane ❑Planned Rural Residential Development(PRRD)/Amendments**
❑Sign ❑Plat Vacation/Alteration**
❑Allowed"Yes"Use Consistency Analysis 0 Shoreline Master Program Exemption/Permit Revisions**
jh Stom-twater Management 0 Shoreline Management Substantial Development*"
0 Site Plan Approval Advance Determination(SPAAD)* 0 Shoreline Management Variance
❑Temporary Use 0 Comprehensive Plan/UDC/Land Use District Map Amendment
❑Wireless Telecommunication* 0 Jefferson County Shoreline Master Program Amendment
❑Forest Practices Act/Release of Six-Year Moratorium ❑Tree Vegetaion Request
*May require a Pre—Application Conference _ **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 s `� rs `"'� to act as my agent in matters relating to this application for permit(s).
OWNER SIGNATURE J� <:-
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 it's 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.311 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 Cpunty in writing at the
time of the application that he or"she wants prior notice. e�� ( '/�/a5 14i-i; T 5}'1/E rq r�a�t P
Signature:-� ^-- --,, -_— ' �,� t k lL `J 4-4,, Date: 1/18/08 /
The action or actioniVilicant will undertake as / suit of the issuance of this permit may negatively impact upon one 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
and non-trasferable responsibility for adhering and complying v tab thefSA. The Applicant has read this disclaimer and signs and dates it below.
Signature: "_ _-'�', V-- L '1U - �.l &l Date: 1/18/08
`' / ( u W ,t r, esfz_me11-it ry ']-rasa)
C:\Documents and Settings\caral\Local Settings\Temporary Internet Files\OLK86\Master Permit Application 12-19-2006.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 assuming the responsibility of the General Contractor for the proposed project.
Signature: Date
GENERAL CONTRACTOR OR MANUFACTURED HOME INSTALLER: PHONE: FAx:
( ) ( )
MAILING ADDRESS: Lae- Z✓
.. . C.440,j 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 ❑ Steel Proposed: Bank 0 Community System
❑ Alteration/Remodel 0 Concrete Total: Height: ❑ Individual System
❑ Repair ❑ MasonrySEP Permit#
❑ Demolition ❑ Other: Bedrooms: Water Supply:
Existing: Setback:
Type of Heat: Proposed: ❑ Private well ❑ Two Party
Total: 0 Public
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.
Square Footage Current Proposed For Office Use Only, Amount . Revision'
Main Floor Heated EH Bld App Review: 1
2ntl Floor Heated
Consistency Review: th
Other Heated Base fee: y
Mezzanine `��' �'
Additional Section:
Heated Basement Plan Check fee:
a i
Unheated Basement 81 • I
State Surcharge fee:
Other Unheated ' --\'
Pot Water Review fee: NA
Garage/Carport SUBTOTAL n q -
(
Decks '" ♦3 1
911/Rd Approach fee:
Other
TOTAL: $
Receipt Number: 16
Cash/Check Number: c36
ESTIMATED COST(REQUIRED) -— _ /
Date: �Ia�r0g
•Fair ma et value of all labor and materials foundation to finish -J`
0�QOQ FEB 2 fnitg8
G:\PermitCenter\###FORMS###\DRD FORMS\Master Permit Application 12-19-2006.doc__ ''
f ••
../11c°a JEFFERSON COUNTYAOV
194441 , , STORMWAPPRT'ER P ED A+ DEPARTMENT OF COMMUNITY DEVELOPMENT
621 Sheridan Street•Port Townsend•Washington 98368 APR 42008
360/379-4450 .360/379-4451 Fax
http://www.co.jefferson.wa.uskomrndevelopment/
!EPEE' a,UN
DEPT.OF C. rr!� a , ,.Stormwater Calculation Worksheet SIGNATUR: �, fft
r xt
MLA# PROJECTAPPUCANT NAME
SLIDE REPAIR - STAN HUME
DETERMINING STORMWATER MANAGEMENT REQUIREMENT;_This stormwater calculation wodcsheet should be co
to classify the proposal as"small,"•Tedium,"or"large' required in The size determines whether a Stormwater Site Plan is completed first
with a stand-alone stormwater management permit application,budding permit application, approval application that.
or other land use conjunction
involves stormwater review. The basic information will also be helpful for completing a Stormwater Site Plan,--- required.
PARCEL SCrE:
Size of parcel _ acres
An acre contains,43,560 square feet. Multiply the acreage by this figure.
Size of parcel in square feet
Land-disturbing activity,is any activity that results in movement of earth, or a change in the existing sod cover
non-vegetative) and/or the existing soil topography, Land disturbing activities include, but are not limited to clearing,
excavation,and compaction (both vegetative and
pa associated with stabiT¢ation of structures and road constnxiien. grading, filling,
Native vegetation is vegetation comprised onplant
Pacific rth which teas species,other than noxious weeds,that are indigenous to the coastal
Pacific
Northwestandhem on y could have been expected to naturally occur on the site. region of thes
and salal;la fir,western ,western red cedar,alder,big-leaf maple,and vine Examples include species such y
herbaceous plants such as sword fern,foam flower,and fireweed. �'shrubs such as willow,elderberry.salmonberry,
LAND DISTURBING ACTIVITY CONVERSION OF NATIVE VEGETATION AND VOLUME OF CUT/FILL
Calculate the total area to be cleared
excavated and/or corn ,graded,filled, Answer the following two questions related to
pacted for proposed development conversion of native
project. Include in this calculation the area to be cleared for: vegetation:
Does the project convert%acres or more of
Construction site for structures 1325
sq/ft native vegetation to lawn or landscaped areas?
Drainfield,septic tank,etc.Fx _ N f A
--.__ sq/ft Circle: Yes C �
Well,utilities,etc. E N/A
sq/fi Does the project convert 21i acres or more of
Driveway,parking,etc._Ex_ �r/q sq/ft
native vegetation to pasture?
Lawn,landscaping,etc. .x N/a sq/ft Circle: YesNoOther compacted surface.etc.
sq/ft Indicate Total Volumes of Proposed:
Total Land Distudmme s Cut_ 1 3? 5 dlfft 12 0
' L o .����JJ —__ Fill 125 (cu/yd)
', [over]
stormwater calc wo,1 sheet—REV.10/12003
1
Impervious surface is a hard surf at either prevents or retards the entry of wale.the soil mantle as under natural
s
prior to development. A hard surfac�a which causes water tocondition from the flow present under natural conditions run off the surface in greater quantities or at an increased rate of flow
tops, walkways,wp patios, driveways, prior to development Common impervious surfaces include,but are not limited to roof
Y ,parking lots or storage areas, concrete or asphalt paving,gravel roads, packed earthen materials,
and oiled,macadam or other surfaces which similarly impede the natural infiltration of stormwater.
STORMWATER CALULATIONS—IMPERVIOUS SURFACE
NEW
EXISTING
Structures(all roof area)
Structures(all roof area) N/A scifft
Sidewalks
s9 Sidewalks
Patios
sq� Patios
sWft
Solid Decks
sclift
-(without infiltration below) Solid Decks
(without infiltration below)
Driveway
Driveway
sq/ft
Other
sq/ft
Other
Total New 0 ses
NOTE: glide repai do
r es not cre to Total Existing
any impervious surface.
TOTAL NEW+TOTAL OUSTING*
stint 'This amount wit be used to check total lot coverage.
The following questions will help determine whether the proposed project is considered development or redevelopment
DEVELOPMENT v.REDEVELOPMENT
Diuide-thelotal existino'
--,. _---..impen+ious surface above by the size of the parcel and convert to a
p 'percentage: - _ o�
Does the site have 35%or more of e _ng impervious surface?
Circle: Yes
FURTHER INSTRUCTIONS: If the answer is yes, the ,•
to ne the a feGanwm proposal is considered redevelopment and the attached Figure 2 should be
used
termi 1 should be used. imt hmis Requirements. If the answer is no,the proposal is considered new development and the
attache Figure forshout stormwater management.
the applicant should refer to the applicable Flow Chart to determine the Minimum
9ement. DCD staff will help verify the classification of the project and the application requirements.
proponents of 'Smali" projects who mustForproponents
Prevention—an additional r projects
not requir comply only � Minimum Requirement.#2--Construction Stormwater Pollution
prevent sediment and other pollutants from leaving the e proponent
dust responsible for employing the 12ro ElementsPic to the C nstiuctInd
ion
Stormwater Pollution Prevention (SWPP) Managementg construction phase of the project. Pick up the Construction
that must meet only Minimum Requirements Best through # Practices (BMPs) Packet. Proponents of"mediums projects—those
Requirements—are required to submit a Stormwater Site lan.. DCD has prepared large" projects—those that must meet all Stormwater10 Minimum
principally for rural residential projects. Complete the template in the Stormwater Site Plan Instructions and Submittal Templatelate of a Site or
prepare a Stormwater Site Plan using the step-by-step guidance in the Stormwater Management Manual.
APPLICANT SIGNATURE
By signing the Stormwater Calculation Worksheet, I as the applicant/owner attest that the information provided herein is true and
correct to the best of my knowledge. I also certify that this application is being made with the full knowledge and consent of all
owners of the affected property.
(LANDOWNER OR AU7}IOR1ZED REPRESENTATNE SIGNA tt�, — — Z`T 0E5
•
(DATE)
( 'n
Batercalcworksheet—REV.1W1/2003
2
WATER AND SEE,PERMITS,PLANNING,BULKHEADS,ROADS,PLATTIN•LAND SURVEYING
A•D•A ENGINEERING, L.L.C.
ARMSTRONG,DeGROOT&ASSOCIATES
ENGINEERS AND SURVEYORS
HERBERT A.ARMSTRONG P.O.BOX 847
PETER C.DeGROOT (371 NW LINDVIG WAY)
A'D A POULSBO,WASHINGTON 98370
Serving You Since 1960 PHONE(360)779-6633
BAINBRIDGE ISLAND(206)842-6123
FAX(360)779-7031
SLIDE REPAIR- STAN HUME
180 Forest Lane
Brinnon, WA 98320
NARRATIVE FOR STORM WATER PLAN
SCOPE: The plan is for the Construction of a gabion wall buttress and installation of light
loose rip rap slope protection to be placed on the bare slope that was eroded during the 100 year
plus storm, December 3, 2007. The area to be covered with pervious rip rap and gabions is only
1325 SF and therefore this work is by definition a"small"project. A "small"project still
requires, requirement#2 (SWPP), so the following narrative addresses each of the 12 Elements.
Element#1 Clearing limits - the Project area was cleared by December 3, 2007 storm
caused erosion and no more clearing is proposed.
Element#2 Establish Construction Access. Construction access shall be over the
existing gravel driveway that serves the Humes and Holtz residences. The County Road (Forest
Drive is above this driveway, so sediment will not wash onto the road.
Element#3 Control Flow Rates. This slide repair project does not create any
impervious surface, so there will not be any increase inflow from the site.
Element#4 Install Sediment Controls. A filter fence will be installed on the downhill
side of the bench area to be excavated,prior to grading.
Element#5 The slope to be repaired and protected has been bare soil since the
December 3, 2007 storm that caused the slide, and it is to be covered with light loose rip rap
slope under this project.
Element#6. Protect Slopes. The existing driveway shall be regraded to direct off-site
drainage away from the eroded slope.
Jefferson County should install a new larger culvert on Forest Lane above ___
the Hume-Holtz driveway to keep off site storm water from this property.
F P 29 'Tr
• •
Material excavated from this gabion wall footing shall be hauled off site and
disposed at a suitable site (approximately 120 CY).
Element#7 Protect Drain Inlets N/A
Element#8 Stabilized Channel and Outlets. Jute Matting is to be placed on the bare
slope below the gabion wall buttress, adequately staked (stabilized to the slope).
Element#9 Control Pollutants.Maintenance and repair of heavy equipment and
construction vehicles shall be per BMP's.
Element#10. N/A
Element#11 Maintain BMP'S.BMP's shall be maintained and/or removed at the
completion of the project.
Element#12 Manage the Project. The Owner's Contractor shall manage the Project and
at this time Estimates 1 week to complete the slide repair work.
CONCLUSION:
The SWPP and the 12 elements shall become a part of the Contract documents, attached
herewith.
Signed,
. 11,11/41-7,.."44009-
Herbert A. Armstrong
Project Engineer
HAA/ela
•
2.5 Minimum Requirements
This section describes the minimum requirements for stormwater
management at development and redevelopment sites. Section 2.4 should
be consulted to determine which requirements apply to any given project.
Volumes II through V of this manual present Best Management Practices
(BMPs) for use in meeting the Minimum Requirements.
Throughout this Chapter, guidance to meet the requirements of the
Puget Sound Water Quality Management Plan is written in bold and
supplemental guidelines that serve as advice and other materials are
not in bold.
2.5.1 Minimum Requirement#1: Preparation of Stormwater
Site Plans
All projects meeting the thresholds in Section 2.4 shall prepare a
Stormwater Site Plan for local government review. Stormwater Site
Plans shall be prepared in accordance with Chapter 3 of this volume.
Objective
The 2,000 square feet threshold for impervious surfaces and 7,000 square
foot threshold for land disturbance are chosen to capture most single
family home construction and their equivalent. Note that the scope of the
stormwater site plan only covers compliance with Minimum Requirements
#2 through#5 if the thresholds of 5,000 square feet of impervious surface
or conversion of 3/4 acre of native vegetation to lawn or landscape, or
conversion of 2.5 acres of native vegetation to pasture are not exceeded.
Supplemental guidelines
Projects proposed by departments and agencies within the local
government with jurisdiction must comply with this requirement. The
local government shall determine the process for ensuring proper project
review, inspection, and compliance by its own departments and agencies.
2.5.2 Minimum Requirement#2: Construction Stormwater
Pollution Prevention (SWPP)
All new development and redevelopment shall comply with
Construction SWPP Elements #1 through #12 below.
Projects in which the new, replaced, or new plus replaced impervious
surfaces total 2,000 square feet or more, or disturb 7,000 square feet
or more of land must prepare a Construction SWPP Plan (SWPPP) as
part of the Stormwater Site Plan (see 2.5.1). Each of the twelve
elements must be considered and included in the Construction
February 2005 Volume I—Minimum Technical Requirements 2-15
• •
• Street wash wastewater shall be controlled by pumping back on-
site, or otherwise be prevented from discharging into systems
tributary to state surface waters.
Element 3: Control Flow Rates
• Properties and waterways downstream from development sites
shall be protected from erosion due to increases in the volume,
velocity, and peak flow rate of stormwater runoff from the project
site, as required by local plan approval authority.
• Downstream analysis is necessary if changes in flows could impair
or alter conveyance systems, stream banks, bed sediment or
aquatic habitat. See Chapter 3 for offsite analysis guidance.
• Where necessary to comply with Minimum Requirement#7,
stormwater retention/detention facilities shall be constructed as
one of the first steps in grading. Detention facilities shall be
functional prior to construction of site improvements(e.g.
impervious surfaces).
• The local permitting agency may require pond designs that
provide additional or different stormwater flow control if
necessary to address local conditions or to protect properties and
• waterways downstream from erosion due to increases in the
volume,velocity, and peak flow rate of stormwater runoff from
the project site.
• If permanent infiltration ponds are used for flow control during
construction, these facilities should be protected from siltation
during the construction phase.
Element 4: Install Sediment Controls
• Prior to leaving a construction site, or prior to discharge to an
infiltration facility, stormwater runoff from disturbed areas shall
pass through a sediment pond or other appropriate sediment
removal BMP. Runoff from fully stabilized areas may be
discharged without a sediment removal BMP, but must meet the
flow control performance standard of Element#3, bullet#1. Full
stabilization means concrete or asphalt paving; quarry spalls used
as ditch lining; or the use of rolled erosion products, a bonded
fiber matrix product, or vegetative cover in a manner that will
fully prevent soil erosion. The Local Permitting Authority shall
inspect and approve areas stabilized by means other than
pavement or quarry spalls.
•
Sediment ponds,vegetated buffer strips, sediment barriers or
filters, dikes, and other BMPs intended to trap sediment on-site
shall be constructed as one of the first steps in grading. These
February 2005 Volume I—Minimum Technical Requirements 2-17
• •
• from October 1 through April 30 no soils shall remain exposed
and unworked for more than 2 days; and
• from May 1 to September 30, no soils shall remain exposed and
unworked for more than 7 days.
Element 6: Protect Slopes
• Cut and fill slopes shall be designed and constructed in a manner
that will minimize erosion.
• Consider soil type and its potential for erosion.
• Reduce slope runoff velocities by reducing the continuous length
of slope with terracing and diversions, reduce slope steepness, and
roughen slope surface.
• Off-site stormwater(run-on) shall be diverted away from slopes
and disturbed areas with interceptor dikes and/or swales. Off-site
stormwater should be managed separately from stormwater
generated on the site.
• At the top of slopes, collect drainage in pipe slope drains or
protected channels to prevent erosion. Temporary pipe slope
drains shall handle the peak flow from a 10 year,24 hour event
assuming a Type 1A rainfall distribution. Alternatively,the 10-
year and 25-year, 1-hour flow rates indicated by an approved
continuous runoff model, increased by a factor of 1.6, may be
used. Consult the local drainage requirements for sizing
permanent pipe slope drains.
• Provide drainage to remove ground water intersecting the slope
surface of exposed soil areas.
• Excavated material shall be placed on the uphill side of trenches,
consistent with safety and space considerations.
• Check dams shall be placed at regular intervals within channels
that are cut down a slope.
• Stabilize soils on slopes, as specified in Element#5.
Element 7: Protect Drain Inlets
• All storm drain inlets made operable during construction shall be
protected so that stormwater runoff shall not enter the conveyance
system without first being filtered or treated to remove sediment.
• All approach roads shall be kept clean. All sediment and street
wash water shall not be allowed to enter storm drains without
prior and adequate treatment unless treatment is provided before
the storm drain discharges to waters of the State.
• Inlets should be inspected weekly at a minimum and daily during
storm events. Inlet protection devices should be cleaned or
February 2005 Volume l—Minimum Technical Requirements 2-19
• •
include, but are not limited to, bulk cement, cement kiln dust, fly
ash,new concrete washing and curing waters,waste streams
generated from concrete grinding and sawing, exposed aggregate
processes, and concrete pumping and mixer washout waters.
Stormwater discharges shall not cause or contribute to a violation
of the water quality standard for pH in the receiving water.
• Construction sites with significant concrete work shall adjust the
pH of stormwater if necessary to prevent violations of water
quality standards.
Element 10: Control De-Watering
• Foundation,vault, and trench de-watering water,which has
similar characteristics to stormwater runoff at the site, shall be
discharged into a controlled conveyance system prior to discharge
to a sediment trap or sediment pond. Channels must be stabilized,
as specified in Element#8.
• Clean, non-turbid de-watering water, such as well-point ground
water, can be discharged to systems tributary to state surface
waters, as specified in Element#8, provided the de-watering flow
does not cause erosion or flooding of receiving waters. These clean
waters should not be routed through a stormwater sediment pond.
• Highly turbid or otherwise contaminated dewatering water, such
as from construction equipment operation, clamshell digging,
concrete tremie pour,or work inside a cofferdam, shall be handled
separately from stormwater.
• Other disposal options, depending on site constraints, may
include: 1) infiltration,2) transport off-site in a vehicle, such as a
vacuum flush truck,for legal disposal in a manner that does not
pollute state waters,3)Ecology-approved on-site chemical
treatment or other suitable treatment technologies, 4) sanitary
sewer discharge with local sewer district approval, if there is no
other option, or 5) use of a sedimentation bag with outfall to a
ditch or swale for small volumes of localized dewatering.
Element 11: Maintain BMPs
• All temporary and permanent erosion and sediment control BMPs
shall be maintained and repaired as needed to assure continued
performance of their intended function. All maintenance and
repair shall be conducted in accordance with BMP specifications.
• All temporary erosion and sediment control BMPs shall be
removed within 30 days after final site stabilization is achieved or
_ _ _ after the temporary BMPs are no longer needed. Trapped
sediment shall be removed or stabilized on site. Disturbed soil
•
February 2005 Volume l—Minimum Technical Requirements 2-21
•
• If clearing and grading limits or erosion and sediment control
measures shown in the approved plan are not maintained.
The following activities are exempt from the seasonal clearing and
grading limitations:
1. Routine maintenance and necessary repair of erosion and
sediment control BMPs;
2. Routine maintenance of public facilities or existing utility
structures that do not expose the soil or result in the removal of
the vegetative cover to soil; and
3. Activities where there is one hundred percent infiltration of
surface water runoff within the site in approved and installed
erosion and sediment control facilities.
• Coordination with Utilities and Other Contractors - The primary
project proponent shall evaluate,with input from utilities and
other contractors, the stormwater management requirements for
the entire project, including the utilities,when preparing the
Construction SWPPP.
Inspection and Monitoring-All BMPs shall be inspected,
maintained, and repaired as needed to assure continued
performance of their intended function. Site inspections shall be
conducted by a person who is knowledgeable in the principles and
practices of erosion and sediment control. The person must have
the skills to 1) assess the site conditions and construction activities
that could impact the quality of stormwater, and 2) assess the
effectiveness of erosion and sediment control measures used to
control the quality of stormwater discharges.
• For construction sites one acre or larger that discharge
stormwater to surface waters of the state, a Certified Erosion and
Sediment Control Specialist shall be identified in the Construction
SWPPP and shall be on-site or on-call at all times. Certification
may be obtained through an approved training program that
meets the erosion and sediment control training standards
established by Ecology.
Whenever inspection and/or monitoring reveals that the BMPs
identified in the Construction SWPPP are inadequate, due to the
actual discharge of or potential to discharge a significant amount
of any pollutant, appropriate BMPs or design changes shall be
implemented as soon as possible.
• Maintaining an Updated Construction SWPPP - The Construction
SWPPP shall be retained on-site or within reasonable access to the
site.
February 2005 Volume I—Minimum Technical Requirements 2-23
f • cr► 11 {-1.Q,gQc -}-,
ALLEN L. HART ENGINEERING GEOLOGIST
1720 NORTH OAKES,TACOMA,WASHINGTON 98406
(253)752-8963
January 22,2008 Project No. 0801006
Stan Hume
180 Forest Drive
Brinnon, Washington 98329
Review Letter
Stan Hume Slide Repair
Brinnon,Jefferson County,Washington
Parcel Number: 932900105
This letter is drafted at the request of Herb Armstrong, of ADA Engineering, and follows my discussions
with Mr.Armstrong and review of the proposed slide repair drawings he has provided.The purpose of
these discussions and review was to provide a basis for commenting on the feasibility of the proposed
slope repair plan. This review is not intended to be a design level review and the provision of design
recommendations is beyond the scope of this review.It should be anticipated that a site specific
geotechnical investigation will be necessary to more fully evaluate the slope, subsurface soil conditions
and proposed retaining structure design as a basis for providing specific design recommendations for the
proposed structure.
From Mr.Armstrong it is understood that the down slope property owner will not allow any work on his
property. Therefore all work, staging and material storage must occur on the up slope property with no
down slope encroachments. It is also understood that as exposed in the slope face the site soils are
comprised of sand and gravel and a tie back sheet pile wall is proposed.
Based on my discussions with Mr.Armstrong and review of the drawings provided,it is my opinion that
4, conceptually the proposed tie back sheet pile wall is a feasible means of slope repair and stabilization of
the retained portion of the slope.However, it is my recommendation that if the project goes forward a
site specific geotechnical investigation be undertaken to more fully address siting and design
considerations including subsurface soil and ground water conditions,pile embedment depth,tie back
location(s)and depths,and design wall loadings.
GEOLOGIC AND GEOTECHNICAL CONSULTING
•
Project No. 0801006 S
Review Letter
Hume Slide Repair,Brinnon,WA
January 22,2008
Page No.2
Drawings Reviewed
Drawings prepared by ADA Engineering,LLC,Job Number: 08-E6056,Dated January 2008.
"Slide Repair Plan,Portion of Lots 6, 7 and 12, Plat of Williams Addition,Block 1"
"Slide Repair Cross Sections and Details,Portion of Lots 6, 7 and 12,Plat of Williams Addition,Block
1"
Letter Limitations
This letter has been prepared for the exclusive use of Stan Hume and his agents for use in considerations
regarding the subject property and proposed slide repair. The forgoing comments and conclusions are
based on verbal information provided by Mr.Herb Armstrong and review of the drawings noted above
and may be subject to modification following additional studies.The conditions described in this letter
and the conclusions and recommendations contained in this letter are provided for this specific project
only and should not be expanded for use on adjacent sites or properties or projects without additional
exploration and review of those sites by this firm. The results of this review are intended for the use of
the original client only.Use of this letter in whole or part by third parties will require a written agreement
be in place between the consultant and the third-party.
Within the limitations of scope, schedule, and budget for this work, it is warranted that the work has been
done in accordance with generally accepted practices followed in this area at the time this letter was
made.No other warranty,expressed or implied is made.
Should you have any questions or if I may be of additional assistance,please call my office at(253) 752-
8963.
Sincerely, �/,;:".,,� ��. 4
x(
"sy
Engineering Geologist
Allen L. Hart, CPG,RG/CEG `. .�;.;. Asa 5`..
Licensed Engineering Geologist '� Ytl -O 0,- i ,t-94--
.. '3.k: L. MART
CC: Herb Armstrong,ADA Engineering
ALLEN L.HART ENGINEERING GEOLOGIST 1720 North Oakes,Tacoma,Washington 98406