HomeMy WebLinkAboutGeotech Waiver 965000003TO:
FROM:
DATE:
RE:
Josh D. Peters, Planning Manager / UDC Administrator
Amanda Hunt, Assistant Planner
August 23rd, 2022
Kala Point Dr, Port Townsend, WA 98368 (Parcel 965000003) Geotechnical Report Waiver Request – Approval Recommendation
Robert Beazley applied for a geotechnical report waiver during the course of a septic system application. They plan to construct a new septic system for residential development. Their property is mapped as a Shoreline Slope Stability Area- Intermediate Slope. I have reviewed the
waiver request submitted by Mr. Beazley, available map and data, and completed the attached geohazard checklist. They will implement applicable best management practices during construction, such as re-vegetation of disturbed areas, hay bales, and silt fencing. The building area has a slope of approximately 10% and the parcel has an overall slope of approximately 8%.
A site visit was not conducted for geological review of this property. According to Jefferson County DCD GIS Mapping, the property is heavily vegetated, mildly sloped, and contains soils not subject to moderate to high erosion and runoff. The surrounding residential properties are developed and do not have previous geological reviews/studies submitted. Based on our available data, the Beazely site, proposed development, and analysis from the geohazard
checklist, I find that the standards for a geotechnical report waiver, under Jefferson County Code 18.22.910, have been satisfied.
_X_ Approved
___ Denied
______________________________________________
Josh D. Peters, Planning Manager / UDC Administrator
Attachments:
Supplemental application waiver from special reports
Geohazard Checklist Site Plan GIS Screen Shots
8/23/2022
Geohazard Checklist
1.Which of the following are mapped on‐site?
Land Slide Hazard: Moderate ____ High ____ Recent Landslide ____ Old Slide ____
Erosion: ____
Seismic: ____
Shoreline Slope Stability: Unstable Slope____ Unstable‐Recent Slide___ Unstable – Old
Slide____ Intermediate_____ Modified ____Stable Slope____
Two or more? Yes ____ No ____
2.Existing Development? Yes ___ No ___ Evidence of geohazard? Yes___ No ___
3.Is the slope greater than 15 %? (rise/run = %) Yes ____ No ___
4.Will the development be less than 35 feet from the top or toe of slope? Yes ____ No ____
5.Does the site have a less stable slope form? Yes ____ No ____ N/A No Slope On-Site
Divergent ____ (most stable) Planar ____ (more stable) Convergent ____ (less stable)
6.Is there any information regarding stability of the soil e.g. septic soil logs, NRSC soil survey etc.
Yes ____ No___ *See "Additional Notes" section below*
7.What type of vegetation on‐site?
Heavily Vegetated with Native (most stable) __not well vegetated (less stable) ____ Recent
Timber Harvest ____ (least stable)
8.Site Visit recommended on moderate or greater risk areas to look for indicators (see list) – Any
indicators? Yes ____ No ____ soil creep with slight raveling on steepest slope
9.Were there any other Geotechnical Report’s done on adjacent properties? Yes ____ No ____ If
yes, did the Geotech indicate a geohazard or unstable slope? Yes ____ No ____
Additional Notes:
1. Proposed septic located over an approximate 8% - 10% slope.
2. Soils: WhC - Whidbey gravelly sandy loam, 0 to 15 percent slopes - "Runoff is slow to medium,
hazard of soil erosion is slight to moderate"
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HxGN Content Program, Jefferson County, Jefferson County WA, WA DNR, Jefferson County, WA., Pro-West & Associates, Inc., Source: Esri, Maxar, Earthstar Geographics, and the GIS User Community³These data are provided on an "AS-IS" basis, without warranty of any type, expressed or implied, including but not limited to any warranty as to their performance, merchantability, or fitness for any particular purpose.This map is not a substitute for accurate field surveys or for locating actual property lines and any adjacent features.
Shoreline Slope Stability Area
Date: 8/18/20221:2,257