HomeMy WebLinkAboutGeotech Waiver 948400011TO: Patty Charnas, Director / UDC Administrator
FROM: Shannen Cartmel, Assistant Planner
DATE: 10/07/2019
RE: 302 View Ridge Drive, Sequim Geotech Waiver Request — Approval
Recommendation
Ms. Backer applied for a geotech waiver during the course of a septic permit application. Ms.
Backer plans to construct a single-family home and an ADU. Ms. Backer's property is mapped
as a slight landslide hazard area. I have reviewed Ms. Backer's waiver request, available map
and data, and completed the attached geohazard checklist. Ms. Backer will implement applicable
best management practices during construction. Ms. Backer's stormwater permit does not trigger
a geotech, as her site is less than 15% grade. The slope is graded across the entire property and is
approximately 13%. Based on our available data, Ms. Backer's site, proposed development, and
analysis from the geohazard checklist I find that the standards for a geotechnical report waiver,
under Jefferson County Code 18.22.370, have been satisfied.
Approved
Denied
Patty Charnas, Director / UDC Administrator
Attachments:
Supplemental application waiver from special reports — geotech
Maps
Geohazard Checklist
Site Plan
Geohazard Checklist
(for internal use only)
1. Which of the following are mapped on-site?
Land Slide Hazard: Slight Moderate High
Erosion:
Seismic:
Shoreline Slope Stability: Unstable Landslide
Two or more? Yes No
Recent Landslide
Modified
Existing; Development? Yes _ No Evidence of geohazard? Yes_ No
2. Is the slope greater than 15 %? (rise/run = %) Yes No i
Old Slide
If yes to #1 and #2, will the development be greater than 35 feet from the slope? Yes
Unknown
If = No or Unknown = Geotech. If Yes, continue with checklist.
3. Does the site have a less stable slope form? Yes No
Divergent . (most stable) Planar (more stable) Convergent (less stable)
No
4. Is there any information regarding stability of the soil e.g. septic soil logs, NRSC soil survey etc.
Yes No
S. What type of vegetation on-site?
Heavily Vegetated with Native (most stable) !,, Not well vegetated (less stable) Recent
Timber Harvest (least stable)
6. Site Visit recommended on moderate or greater risk areas to look for indicators (see list) —Any
indicators? Yes No
S'
7. Were there any other Geotechs done on adjacent properties? Yes No
If yes, did the Geotech indicate a geohazard or unstable slope? Yes No
DEPARTMENT OF COMMUNITY DEVELO
621 Sheridan Strcct, Port Townsend, WA 98368
Tel: 3617.3'9.44511 1 Fax: 360.3"9.4451
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I, Anne Backer
Property Owner's Name
located at 302 View Ridge
WAIVER REOUEST
FROM SPECIAL REPORTS
owner of parcel 948 400 011
Property Address
it Le
OCT -7 2019
Parcel number
hefeby request a waiver from the requirement for a Geotechnical Report
Type of Special Report
under JCC 18.22.370, in association with critical area review and protection standards under JCC
18.22.170 for permit application SEP 19- 212 for the following reasons:
Code Section permit case number
18.22.370 Waivers.
The administrator may waive the requirement for a special report when an applicant demonstrates all of the following:
(1) The proposal involved will not affect the critical area in a manner contrary to the goals, purposes and
objectives of this code, because:
see attached
42)The minim -urn protection standards -required by this chapter are satisfied, by:
see attached
Signed 0bAy:1- #' 4
Property Owner
Staff Comments:
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Special Report Waiver Justification
Backer SEP 19-00212
302 View Ridge Drive
1- Minor slope -- The property slopes North toward Discovery bay, with slopes ranging from
5-15%. The proposed development (house and septic system) lies on a ten percent slope.
2- Distance to moderate / high land slide risk areas — There are no moderate / high risk
landslide areas below the property. (see exhibit A).
3- No signs of erosion, or landslide activity in area of proposed development.
OCT� 2o�s I
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RELEASE AND WAIVER
Applicant: Anna M Backer OCT 1 7 2019
PO Box 4486
Spanaway, WA 98387-4032
Property: Assessor's property tax parcel no.: 948400011
Legal description: Eagle Crest Development Lot 11 SUBREASE
Address: 302 View Ridge Drive
Please read this form carefully and be aware that, in applying for and receiving a permit
for development, you are knowingly and willfully seeking a waiver from the requirement of a
professional geotechnical report describing your Property, proposed development, and potential
risk of earth movement. Your Property contains a mapped Geologically Hazardous Area, a
Critical Area as defined by Chapter 18.22 of the Jefferson County Code. Mapped Geologically
Hazardous Areas may contain site features, such as soil, hydrology, or topography features that
increase the risk of earth movement, which may present a risk to life and property. In accordance
with permitting the construction of the items described and listed below within an
Environmentally Sensitive Area, Applicant(s) acknowledge and agree as follows:
1. Applicant(s) desire to construct a new septic system, a new single family residence and
an ADU. The Property is located within a Geologically Hazardous Area with a slight
Landslide Hazard Area. Applicant(s) agree that they are fully aware of the risks inherent
in development in a Geologically Hazardous Area and slight Landslide Hazard Area.
2. Applicant(s), as their own free and voluntary act, accept, and assume all risks of loss or
damage arising out of the conditions described herein and further agree to relieve
Jefferson County, its agencies, divisions, officers, agents, and employees of any
liability, damages, claims, or other expenses arising as a result of or allegedly as the
result of the approval of the development and the approval of the Applicant(s)' proposed
development.
3. Applicant(s) agrees to and shall hold harmless and indemnify the Jefferson County, its
agencies, divisions, officers, agents, and employees from and against any and all
liability, loss, claims, suits, damages, costs, expenses (including attorney's fees) that
may arise at any time, occur or be generated as a result of any reduction in the fair
Page 1 of 3
market value of the Applicant(s)' Property and/or any damage to personal property or
personal injury by reason of the conditions existing now or any time hereafter on or
around the Applicant(s)' Property or due to any design, development, or construction
pursuant to the building permit, stormwater management system approval, septic permit,
or any other development permits issues thereunder by the Jefferson County, its
agencies, divisions, employees, agents, officers, or representatives pursuant to any then
applicable state statute, administrative code, regulation, or Jefferson County ordinance.
4. If any term of this Waiver is to any extent invalid, illegal, or incapable of being
enforced, such term shall be excluded to the extent of such invalidity, illegality, or
unenforceability; all other terms shall remain in full force and effect.
5. All associated permits must be obtained or development must be substantially started
within one-year from the effective date of this Waiver. If this condition is not met, the
Waiver shall be void.
6. Development and associated permits must substantially comply with the Exhibit "A"
Site or Development Plan.
7. This Waiver is not a permit of any type.
Applicant(s):
Name Date
Name Date
Page 2 of 3
Exhibit "A"
Site or Development Plan
Page 3 of 3
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Project scope:
1 -Install 480 GPD septic system for new 2 bedroom home, and futureADU..
Elevations Approximate
JILL LJCVCIVP111VIIL VWLCJ.
- Property boundaries and elevations scaled from Jefferson County GIS,
and are approXimatc.
- Protect Drainfield Areas from vehicle traffic, excavation, burn piles, erosion,
or any other soil disturbing activities.
- Installation shall conform to plan specifications, applicable county
and state regulations, and industry standards. Any deviation / substitution must be approved
by designer and/or JCPH prior to installation.
- House locations and construction subject to DCD approval.
- 10' setback from water lines to all septic components shall be maintained.
0 40' 80'
SCALE 1 "=40 FEET
Proposed OSS Components:
1- (2) Minimum 1000 gallon two compartment septic tank with
approved filter in outlet baffle. Risers to surface required.
2-1000 gallon pump tank with effluent purnp capable of 20 GPM at 10' HEAD
Anti -siphon device, screened vault, and riser to surface required.
* All tanks must be on current WSDOH approved list.
3-270 LF pressure distribution drainfeld with 1" SCH 40 laterals, supplied by header
manifold assembly. 1/8" orifices 6' 0. C. (45 total), 12:00 orientation with orifice shields.
-36" wide trenches, 12" trench depth / 12" cover material.
4-100% Reserve Drainfteld Area (see sheet 1)
well site (plat)
RECEIVED
SEP 1 6 2019
-.,J
JEFFERSON COUNTY
ENVIRONMENTAL PUBLIC HEALTH
8/29/19
OSS SITE PLAN - OVERALL
Anna Backer
Parcel # 948 400 011
302 View Ridge Dr - Sequim
SEC 34 TWP 30N R 2W
SHEET 1 of 2