The URL can be used to link to this page

Home My WebLink AboutGEO Assessment - GEO Geological Review - 8/2/2019 GEOLOGICAL ASSESSMENT 210 E PANORAMA DRIVE SHELTON, WASHINGTON PREPARED FOR JEREMY JOHNSON BY ALL AMERICAN GEOTECHNICAL INC. OLYMPIA, WASHINGTON AUGUST 2, 2019 ALL AMEWCAN GEOTECHNICAL INC. CONTACT INFORMATION PREPARER INFORMATION GTL PROJECT NUMBER: AAG19-059 CONTACT: CURTIS D.CUSHMAN ADDRESS: 8947 BUTTONWOOD LANE NE OLYMPIA,WASHINGTON 98516 TELEPHONE: (360)491-5155 CELL/TEXT: (360)481-6677 EMAIL ADDRESS: CURTIS.CUSHMAN@COMCAST.NET CLIENT INFORMATION CLIENT: JEREMY JOHNSON TELEPHONE: (360)359-2747 BILLING ADDRESS: JEREMY JOHNSON C/O CARLOS RODRIQUEZ JOC LLC 3824 HOLLYWOOD DRIVE NE OLYMPIA,WASHINGTON 98512 SITE ADDRESS: 210 E PANORAMA DRIVE SHELTON,WA 98584-7363 PARCEL: 32021-56-01016 GPS LOCATION: N47° 12'43.20" W 123°03' 57.60" 8947 Buttonwood Lane NE Olympia, WA 98516 2 Phone#: (360)491-5155 Cell/Text#: (360)481-6677 AAG 19-059 ALL AMERICAN GEOTECHNICAL INC. SCOPE OF UNDERSTANDING JEREMY JOHNSON C/O CARLOS RODRIGUEZ JOC LLC 3824 HOLLYWOOD DRIVE NE OLYMPIA,WASHINGTON 98512 AUGUST 2,2019 RE: GEOLOGIC ASSESSMENT 210 E PANORAMA DRIVE SHELTON,WASHINGTON 98584-7363 PARCEL#32021-56-01016 N470 12' 43.20". W1230 03' 57.60" Dear Mr. Johnson: As per your request, we have conducted a geological assessment for the above-mentioned parcel. The results of this investigation are to be found in the following assessment. We have provided two copies for your review and distribution. We appreciate this opportunity to be of service to you and we look forward to working with you in the future. If you have any questions concerning the above items, the procedures used, or if we can be of any further assistance please call us at the phone numbers listed below. Respectfully Submitted, ALL AMERICAN GEOTECHNICAL f W a sh;� r 0 2439 �5� Curtis D Cushman ena d Geoff° Senior Engineering Geologist Curtis Dean Cushman 1 8947 Buttonwood Lane NE Olympia, WA 98516 3 ` Phone#: (360)491-5155 Cell/Text#: (360)481-6677 AAG19-059 1 r ALL AMERICAN GEOTECHNICAL INC. TABLE OF CONTENTS CONTACTINFORMATION.......................................................................................................................................................2 SCOPEOF UNDERSTANDING.................................................................................................................................................3 TABLEOF CONTENTS..............................................................................................................................................................4 PURPOSEAND LOCATION...............................................................................................................................................................5 SITECONDITIONS...........................................................................................................................................................................5 GEOLOGICCONDITIONS(1).....................................................................................................................................6 GEOSEISMICSETTING..............................................................................................................................................6 SITESOILS...............................................................................................................................................................7 GROUNDWATER CONDITIONS(2a) ........................................................................................................................ 8 DEPTHTO WATER(2b)........................................................................................................................................... 8 QUANTITYOF SEEPAGE(2e)................................................................................................................................... 8 UPSLOPEGEOMORPHOLOGY(2d)........................................................................................................................... 8 UPLAND WATER BODIES AND WETLANDS(2e)...................................................................................................... 8 DEPTHTO COMPETENT SOIL(3) ............................................................................................................................. 8 PASTSLOPE INSTABILITY(4)..................................................................................................................................9 HISTORY OF LANDSLIDE ACTIVITY(5)...................................................................................................................9 POTENTIAL FOR LANDSLIDE ACTIVITY(6).............................................................................................................9 GEOTECHNICAL REPORT RECOMMENDATION(7)...................................................................................................9 LANDSLIDE HAZARD DETERMINATION(8)(a-d).....................................................................................................9 SITEMAP(9)...........................................................................................................................................................9 CONCLUSIONSAND OPINIONS........................................................................................................................................................9 REPORT LIMITATIONS AND GUIDELINES FOR USE................................................................................................ 10 CONTRACTORS ARE RESPONSIBLE FOR SITE SAFETY ON THEIR OWN CONSTRUCTION PROJECTS........................ 10 PLEASEREAD THESE PROVISIONS CLOSELY......................................................................................................... 10 APPENDIX....................................................................................................................................................................................12 IBC2015 DESIGN SUMMARY................................................................................................................................ 13 FIGURE1:VICINITY MAP...................................................................................................................................... 14 FIGURE2:GENERAL PLAN.................................................................................................................................... 15 FIGURE 3: SEDIMENT AND EROSION CONTROL PLAN........................................................................................... 16 8947 Buttonwood Lane NE Olympia, WA 98516 4 Phone#: (360)491-5155 Cell/Text#: (360)481-6677 AAG 19-059 ALL AMERICAN GEOTECHNICAL INC. PURPOSE AND LOCATION This report summarizes the results of All American Geotechnical (AAG) consulting services for the existing residence on the above-noted property (see Figure 2 Site Map below). A pre-existing residence will be replaced on a permanent foundation by a new residential structure. The parcel is listed as being a .20 acre lot. All utilities are pre-existing. The site is located on E Panorama Drive. E Panorama Drive is accessed from Washington State Route 3 via East Agate Road and East Crestview Drive. The parcel is a parallelogram long to the east-west. The proposed improvement is an old single-story residence on the east side of the property as indicated on the site map. This will be demolished and a new footing placed to support a new residence replacing it. Access to the residence is by a driveway from E Panorama Drive. The residence is located on approximately the 160 foot contour. The elevation of the parcel overall is from approximately140 feet in the southwest to approximately170 feet in the northeast. The site is approximately 2 direct miles east of downtown Shelton, Washington, but is much further by road. The assessment has been commissioned by owner Jeremy Johnson (client). Our understanding of the project is based on our discussion with the client. We understand that the residence will be removed to permit construction of a new, permanent, footing. No grading is expected for this development. The residence will be served by current utilities. The approximate layout of the site is shown on Figure 2. The site was visited by Curtis D Cushman L.E.G. And Blaise Jelinek E.I.T. of All American Geotechnical (AAG)on July 24, 2019. No slope stability analysis was prepared for this property as no slopes on or near the property within 300'of the development met the criteria of a 40% slope with vertical relief of ten or more feet or any of the other criteria requiring a geotechnical report (17.01.100 Landslide Hazard A.l.a. to f.) This was verified at the time of the AAG site visit. Because of the overall slope and the lack of a landslide hazard area, Mason County requires that a geological assessment be prepared in accordance with the Critical Areas Ordinance. The Mason County Resource Ordinance Geologically Hazardous Areas (12-27-2006; revised June 16, 2009) contains the following: 17.01.100 Landslide Hazard Areas E. Special Reports 1. Applicability Category d. Development proposed within 300 feet of areas with slopes between 15 percent (8.5 degrees) and 40 percent (21.8 degrees) will require a Geological Assessment, and may further require a Geotechnical Report upon the findings of the assessment. SITE CONDITIONS The proposed building site is located in an area of dense single-family residential development on the Agate Peninsula area, overlooking Oakland Bay in Mason County, Washington. The visit by AAG was a site investigation by Curtis D Cushman L.E.G and Blaise Jelinek E.I.T. The purpose of a site investigation is to physically observe the property and adjacent properties to identify any 8947 Buttonwood Lane NE Olympia, WA 98516 5 Phone#: (360)491-5155 Cell/Text#: (360)481-6677 AAG19-059 ALL AMERICAN GEOTECHNICAL INC. recognized geologic conditions. Visual observations were documented. Site-specific features were identified, vegetation noted, and local geology noted. No evidence of deep-seated slope instability was observed on site. The parcel has secondary forest growth. Older trees on the parcel to the south and nearby are vertical but there are some that are bent, indicating some minor creep. GEOLOGIC CONDITIONS(1) The slope material is composed of glacial material. The following is the most recent mapping. The Geologic Map of the Shelton 7.5-minute Quadrangle, Mason and Thurston Counties Washington by Schasse, H. W., et al., 2003; Washington Department of Geology and Earth Resources Map Open File Report 2003-24, has mapped the geology as Vashon Till (Qgt). The map legend reads: Vashon till—Unsorted and generally highly compacted mixture of clay, silt, sand, and gravel deposited directly by glacier ice; gray where fresh and light yellowish brown where oxidized Field investigation confirms this geology is correct. This unit will support the proposed modified structure. GEOSEISMIC SETTING The Liquefaction Susceptibility Map of Mason County, Washington by Palmer, Magsino, Poelstra, Bilderback, Folger, and Niggemann (September 2004) maps the site area as having a very low liquefaction potential. The Site Class Map of Mason County, Washington by Palmer, Magsino, Bilderback, Poelstra, Folger, and Niggemann (September 2004) maps the site area as site class C. Site class C is a very dense soil or soft rock. The nearest fault of concern is part of the Tacoma Fault that is mapped in the Allyn, Washington area approximately 15 miles to the northeast of the client property. This fault, while active and has the possibility of producing a substantial earthquake, is not a direct hazard to the property. The FEMA Hazus methodology as cited in the DNR on-line Understanding Earthquake Hazards in Washington State is for an M7.1 scenario. This scenario is for the entire fault system as currently understood with the brunt of the structural damage in King, Pierce, Mason, and Thurston Counties. Thus the concern is regional and not localized upon the fault trace at Allyn, although movement may occur anywhere along the fault trace. 8947 Buttonwood Lane NE Olympia,WA 98516 6 Phone#: (360)491-5155 Cell/Text#: (360)481-6677 AAG19-059 ALL AMERICAN GEOTECHNICAL INC. According to the Seismic Zone Map of the United States contained in the 2015 International Building Code (IBC, Figure 1613.3.1(2): Risk Targeted Maximum Considered Earthquake (MCER) Ground Motion Response Accelerations for the Conterminous United States of 1-second Spectral Response Acceleration (S% of critical dampening), Site Class B.), the project site is located where the maximum spectral response acceleration is 60 percent of gravity (g). The Geoseismic section has been included because of the proximity to the mapped fault. We recommend following seismic factors for design purposes. • Site Class: C (Soft Rock) • Spectral response acceleration, short period (SMs): 1.411 g (Fa= 1.05) • Spectral response acceleration, I-second period (Smi): 0.764g (F,= 1.55) • Peak Ground Acceleration (PGA) 0.600g SITE SOILS The soil on the site is Shelton gravelly ashy sandy loam (Sf). This classification is from the USDA Web Soil Survey and is described as follows. Sf—Shelton gravelly sandy loam, 5 to 15 percent slopes Map Unit Setting • National map unit symbol: 2hn1 • Elevation: 100 to 800 feet • Mean annual precipitation: 50 to 70 inches • Mean annual air temperature: 48 to 50 degrees F • Frost-free period: 150 to 180 days • Farmland classification: Farmland of statewide importance Map Unit Composition • Shelton and similar soils: 100 percent • Estimates are based on observations, descriptions, and transects of the mapunit. Description of Shelton Setting • Landform: Moraines • Parent material: Basal till with volcanic ash Typical profile • HI - 0 to 3 inches: very gravelly medial loam • H2 - 3 to 27 inches: very gravelly medial sandy loam • H3 - 27 to 60 inches: very gravelly sandy loam Properties and qualities • Slope: 5 to 15 percent 8947 Buttonwood Lane NE Olympia, WA 98516 7 Phone#: (360)491-5155 Cell/Text#: (360)481-6677 AAG 19-059 ALL AMERICAN GEOTECHNICAL INC. • Depth to restrictive feature: More than 80 inches; 25 to 36 inches to densic material • Natural drainage class: Moderately well drained • Capacity of the most limiting layer to transmit water (Ksat): Very low to moderately low (0.00 to 0.06 in/hr) • Depth to water table: About 24 to 36 inches • Frequency of flooding: None • Frequency of ponding:None • Available water storage in profile: Very low (about 2.2 inches) This description appears to be valid for the materials seen on-site with the exception of the shallow water table. There were no springs or damp areas immediately down slope from the building site. This is a very common soil as it is directly derived from underlying Vashon till and grades down into the till at shallow depths. It is moderately well-drained, not subject to flooding and is suitable for construction although, as a general rule, the development of footings removes the soil to the underlying firm glacial till. The soil here is also mostly or entirely absent, having been removed for earlier construction. GROUND WATER CONDITIONS(2a) No evidence of active surface erosion was observed. No surface water flow was observed onsite. No ponding of water was observed throughout the site. No seeps or springs were observed on site. DEPTH TO WATER(2b) The water 1992 well on the then Moran property on nearby Shorecrest Drive had a depth to static water at -140 feet. This is below the base level and represents an artesian well. It is evident the construction on the client parcel will not encounter water. QUANTITY OF SEEPAGE(2c) Groundwater seepage was not observed at the proposed building location or throughout the site. Wetland vegetation was not observed at the proposed building location or throughout the site. No wetlands are mapped in the area. There is no FEMA designation. i UPSLOPE GEOMORPHOLOGY(2d) The crest of the slope on which the client building site lies is on a steady rise to a maximum height of 230 feet or so approximately 600 feet to the northeast. This is approximately 65 feet higher than at the client site and poses no hazard. UPLAND WATER BODIES AND WETLANDS(2e) There are no upland water bodies. DEPTH TO COMPETENT SOIL(3) The soil overall is firm as it is related to the underlying glacial till. 8947 Buttonwood Lane NE Olympia,WA 98516 8 Phone#: (360)491-5155 Cell/Text#: (360)481-6677 AAG19-059 ALL AMERICAN GEOTECHNICAL INC. PAST SLOPE INSTABILITY(4) No indication of past instability was discerned at the proposed building location. There was no nearby indication of slope instability. It is rated by the Coastal Zone Atlas as I: Intermediate. HISTORY OF LANDSLIDE ACTIVITY(5) There are no landslides near the site. No landslides or mass wasting is mapped nearby. Landslides are present a half-mile or more to the northeast. LiDAR image on or around the site shows no evidence of landsliding. POTENTIAL FOR LANDSLIDE ACTIVITY(6) There are no Landslide Hazard Areas associated with this project and so there are no LHA setbacks or buffers. Landslide activity should not be a factor in the development and the development should not create any landslide hazard. GEOTECHNICAL REPORT RECOMMENDATION(7) No geotechnical report will be needed for this project. LANDSLIDE HAZARD DETERMINATION(8)(a-d) No Landslide Hazards or associated buffers or setbacks were found present within 300 feet. SITE MAP(9) The site map is on Figure 2 at the end of this report. CONCLUSIONS AND OPINIONS The site is acceptable for the proposed development based on the requirements of Mason County. There is no evidence of soil erosion or displacement onsite to suggest that the site should be included in the Erosion Hazard Area designation.x'Proposed activities and site conditions for the development do not warrant a more comprehensive Geotechnical Report. We recommend no further action is needed unless areas of concern are unearthed during construction. To minimize erosion and sedimentation, we recommend that revegetation be done in areas around the building location following the project. Grass should be used within 10 feet of footings and over any utilities. The owner and builder must assure that silt and other debris during construction do not enter into the local watershed. Silt fences or berms may be needed. 8947 Buttonwood Lane NE Olympia, WA 98516 9 Phone#: (360)491-5155 Cell/Text#: (360)481-6677 AAG19-059 ALL AMERICAN GEOTECHNICAL INC. If there are any changes in the loads, grades, locations, configurations or types of facilities to be constructed,the conclusions and recommendations presented in this report may not be fully applicable. If such changes are made, we should be given the opportunity to review our recommendations and provide written modifications or verifications, as appropriate. REPORT LIMITATIONS AND GUIDELINES FOR USE We have prepared this report for the exclusive use of Jeremy Johnson and his authorized agents for the proposed residential improvement in Mason County, Washington. This report does not specify setbacks for: line-of-sight setbacks, F"CA setbacks, eagle tree setbacks, wetland setbacks, or property line setbacks. Within the limitations of scope, schedule and budget, our services have been executed in accordance with generally accepted practices in the field of geotechnical engineering in this area at the time this report was prepared. No warranty or other conditions, expressed or implied, should be understood. Clients and property owners must understand that, while a slope may be found to have little slide potential related to deep-seated mass wasting, surficial failure and landslides can and do occur on steep slopes. The property owners should monitor the stability of their property following construction. Moreover, being on a moderate slope does not guarantee there cannot be failures. It is the responsibility of the property owners to understand that there are always risks in building on or near sloped areas. CONTRACTORS ARE RESPONSIBLE FOR SITE SAFETY ON THEIR OWN CONSTRUCTION PROJECTS Our geotechnical recommendations are not intended to direct the contractor's procedures, methods, schedule or management of the work site. The contractor is solely responsible for job site safety and for managing construction operations to minimize risks to onsite personnel and to adjacent properties. PLEASE READ THESE PROVISIONS CLOSELY Some clients, design professionals, and contractors may not recognize that geoscience practices (geotechnical engineering or geology) are far less exact than other engineering and natural science disciplines. This lack of understanding can create unrealistic expectations that could lead to disappointments, claims and disputes. All American Geotechnical includes these explanatory "limitations"provisions in our reports to help reduce such risks. Clients and property owners must understand that, while a slope may be found to have an acceptable Factor of Safety related to deep-seated mass wasting, surficial failure and landslides can and do occur on steep slopes. The property owners should monitor the stability of their property following construction. Moreover, acceptable Factors of Safety do not guarantee there cannot be failures. It is the responsibility of the property owners to understand that there are always risks in building on or near steeply sloped areas. 8947 Buttonwood Lane NE Olympia, WA 98516 10 Phone#: (360)491-5155 Cell/Text#: (360)481-6677 AAG 19-059 ALL AMERICAN GEOTECHNICAL INC. The equipment, techniques and personnel used to perform an environmental study differ significantly from those used to perform a geotechnical or geologic study and vice versa. For that reason, geotechnical engineering or geologic reporting does not usually relate any environmental findings, conclusions or recommendations; e.g., about the likelihood of encountering underground storage tanks or regulated contaminants. Similarly, environmental reports are not used to address geotechnical or geologic concerns regarding a specific project. 8947 Buttonwood Lane NE Olympia, WA 98516 11 Phone#: (360)491-5155 CelUText#: (360)481-6677 AAG 19-059 ALL AMERICAN GEOTECHNICAL INC. APPENDIX IBC Design Summary Figure 1: Vicinity Map Figure 2: Site Plan Figure 3: Erosion and Sediment Control Plan 8947 Buttonwood Lane NE Olympia,WA 98516 12 Phone#: (360)491-5155 Cell/Text#: (360)481-6677 AAG 19-059 ALL AMERICAN GEOTECHNICAL INC. IBC 2015 DESIGN SUMMARY' Search Information e/ _ Olympic �T s Coordinates: 47,212,-123.066 National Forest Elevation: ft -01 Timestamp: 2019-08-02T21:36:50.248Z � for Hazard Type: Seismic 0 yWa S ` Elrtta Reference IBC-2015 -oAberder Document: oo le Risk Category: III 9 � Map Report a mep errs Site Class: C MCER Horizontal Response Spectrum Design Horizontal Response Spectrum Sa(g) Sa(g) 1.40 1.20 0.80 1.00 0.80 0.60 0.60 0.40 0.40 0.20 0.20 0.00 0.00 0 5 10 15 Period(s) 0 5 10 15 Period(a) Basic Parameters Name Value Description SS 1.411 MCER ground motion(period=0.2s) S, 0.588 MCER ground motion(period=1.0s) Sµq 1.411 Site-modified spectral acceleration value Sw 0.764 Site-modified spectral acceleration value SDS 0.941 Numeric seismic design value at 0.2s SA SD, 0.509 Numeric seismic design value at 1.0s SA Additional Information Name Value Description SDC D Seismic design category Fa 1 Site amplification factor at 0.2s FV 1.3 Site amplification factor at 1.0s CRS 0.973 Coefficient of risk(0.2s) CRC 0.923 Coefficient of risk(1.0s) PGA 0.6 MCEG peak ground acceleration FpGA 1 Site amplification factor at PGA 8947 Buttonwood Lane NE Olympia, WA 98516 13 Phone#: (360)491-5155 Cell/Text#: (360)481-6677 AAG 19-059 ALL AMERICAN GEOTECHNICAL INC. FIGURE 1:VICINITY MAP 123106.000'W 123'05.000'W 123°04.000'W WGS84 123*03.000'W 2 S _ H r� � M.. /,•r' Z o a •w.mt t --- � - i I --- � i--t- �� —--- ha `moo ) •! o z /� Q' 16 ✓�/-'/'1/1)5 7 _•I �T�`1 �� f :�_- 'l j I Jergmy Johnson '. sHutor4.16,E $horelinp� Prco w*dRenovutNi .a e•+ 4": 326� -56-01016 —` ss tw /5 �_ \•� E•pa JatooMs nose. —.� x�,-_ �,�. - -_ fhaMi tY Glfk s ... s 11 A M •sat PAt �.ti= _',T.—��:,:.9yyk e�lS�`' .�?.�� Point pW z �`• _ - �' sr asr 3 : �'`,• t •. +vsr a.. ✓ M, Z 38 ory } , T ', �• -- �- yl.�*ee�S�,: � o of• •• g no.o - 31 J' �a 123°06.000'W 123--0/5.000'W 123°04.000'W WGS84 123103.000'W 1 MILE 16•�a �Wt1 FEET 0 :LO t10D METERS Amtadfrom TOPO'L:001Vatimul0,,aaphx Hold*s(an,toNc ) 8947 Buttonwood Lane NE Olympia, WA 98516 14 Phone#: (360)491-5155 Cell/Text#: (360)481-6677 AAG19-059 ALL AMERICAN GEOTECHNICAL INC. FIGURE 2: GENERAL PLAN 8947 Buttonwood Lane NE Olympia, WA 98516 15 Phone#: (360)491-5155 Cell/Text#: (360)481-6677 AAG19-059 TES Thi is not a survey. Th' map is a presents 'on of info ation from county, ate, and' ederal a ncies, client p ovided information, d ons a observa ions; for discus 'on purposes of the eport ith which is map is inclu d. 'b g ems, J� q t o, Site OlO SCALE 1 20' 117 � C.I. = 5' Qgt -- Vas n Glacial Till `r' Po 'on v % subje to 0 10 20 30 40 UCi Samp renovati 140t df,�1jc %% oash; a1�1� Portion to `� f W Si oil remain. Sf-- Sh lton Gr elly Sandy Loam 5 to 5 perce t slope. `� �,ce 2439 0 n 00 �� use eo •� C Dean shoran 1241 All American Geotechnical,Inc. Project Drawn By: Site Plan Permit Number: Parcel Number: 32021-56-01016 FiLurc 8947 Buttonwood Lane NE Number: BWJ Proposed Remodel 2 Olympia,Washington 98516 AAG19-059 8/2/2019 Shelton,WA Applicant Name: Jeremy Johnson Site Address: 210 East Panorama Drive ALL AMERICAN GEOTECHNICAL INC. FIGURE 3: SEDIMENT AND EROSION CONTROL PLAN 8947 Buttonwood Lane NE Olympia, WA 98516 16 Phone#: (360)491-5155 Cell/Text#: (360)481-6677 AAG19-059 2'_0" V-0" STEEL ROD Y TO PIPE 2 s" . ,ATED TIGHTLINE 4 INCH -9,6 INCH SUGGESTED 2"X4"WOOD POSTS,STAN BETTER OR EQUAL ALTERN STEEL FENCE POSTS I FILTER FABRIC 2"X2"X14 GAUGE WIRE FABRIC OR EQUIVALENT GROUN PROVIDE 3/4"A 1/2"WASHED GRAVEL BACKFILL IN TRENC AND ON BOTH SIDES OF FILT FENCE FABRIC ON THE SURF FILTER FABRIC FENCE NOTES 1. FILTER FABRIC SHALL BE P THE LENGTH OF THE BARR ARE NECESSARY,FILTER C A SUPPORT POST WITH A h FASTENED AT BOTH ENDS 2. POSTS SHALL BE SPACED! SECURELY INTO THE GROL 3. A TRENCH SHALL BE EXCA` INCHES DEEP ALONG THE 1 4. WHEN STANDARD STRENG �,„ 7:Y�!•�o.""' SUPPORT FENCE SHALL B .�': OF THE POSTS USING HEAK:' LONG,TIE WIRES OR HOG ,�a'•.�t'�:`?'.•S;L TRENCH A MINIMUM OF 4 IP INCHES ABOVE THE ORIGIPALE SHOULD BE A 5. THE STANDARD STRENGTFDT WIDE AT THE TO THE FENCE AND 20 INd FOOT DEEP WITH INTO THE TRENCH. THE FPE OF 5 PERCENT. INCHES ABOVE THE ORIGIP NOT BE STAPLED TO THE E 6. WHEN EXTRA-STRENGTH F USED,THE WIRE MESH SUI A CASE,THE FILTER FABRI POSTS WITH ALL OTHER PI 7. FILTER FABRIC FENCES SH AREA HAS BEEN PERMANE 8. FILTER FABRIC FENCES SH RAINFALL AND AT LEAST D REQUIRED REPAIRS SHALL All American Geo Figure 8947 Buttonwood— Olympia, Washing 3 \� MASON COUNTY Submittal Checklist COMMUNITY SERVICES Geological Assessment � Building Planning,Environmental Health,Community Heal[h Instructions: This checklist must be submitted with a Geological Assessment and completed, signed, and stamped by the licensed professional(s)who prepared the Geological Assessment for review by Mason County pursuant to the Mason County Resource Ordinance. If an item is found not applicable,the report should explain the basis for the conclusion. Note:Unless specifically documented, this report does not provide compliance to the International Residential Code Sections R403.1.7 for foundations on or adjacent to slopes, Section R403.1.8 for expansive soils or section 1808.7.1 of the International Building Code Section for Foundations on or adjacent to slopes. Applicant/Owner _ P-resxh ��., Parcel# 0 C') Site Address /d L^ 6/1 ji-h okt(rL4) (�/� (1) A discussion of geologic conditions in the general vicinity of the proposed development, with geologic unit designation based on referenced maps. Located on page(s) 6 —ty (2) (a)A discussion of the ground water conditions at the site, Located on page(s) If RECE!VLE (b) A discussion of the estimated depth to water, Located on page(s) rT FEB 0 6 2020 (c) A discussion of the quantity of surface seepage, Located on page(s) 8 615 W.AJclw Street (d) A discussion of the upslope geo orphology, Located on page(s) C (e) A discussion of location of upland waterbodies and wetlands. PLANprp, �nLocated on page(s) � (3) The approximate depth to hard or�nse competent soil, e.g. glacial till or outwash sand. Located on page(s) (4) A discussion of any geomorphic expression of past slope instability(presence of hummocky ground or ground cracks, terraced topography indicative of landslide block movement, bowed or arched trees indicating downslope movement, etc.). Located on page(s) (5) A discussion of the history of landslide activity in the vicinity, as available in the referenced maps and records. Located on page(s) -I (6) An opinion on whether the proposed development is within the landslide hazard area or its associated buffer or setback and the potential for landslide activity at the site in light of the proposed development_ Located on page(s) (7) A recommendation by the preparer whether a Geotechnical Report should be required to further evaluate site conditions and the proposed development of the subject property. Rev. February 2018 I Located on page(s) Cl (8) If the presence of a hazard is determined within 300 feet of the proposed development,then the following are delineated on a geologic map/site map: ^ i (a) the area of the proposed development, Located on Map(s) (b) the boundaries of the landslide hazard area(top, both sides, and toe), Located on Map(s) (c) the associated buffers(top, both sides, and toe), Located on Map(s) (d) building or other setbacks(top, both sides, and toe). Located on Map(s) (9) A site map drawn to scale showing the property boundaries, scale, north arrow, and the location and nature of existing and proposed development one site. Located on Map(s) I,L��°� s ;� S� i,�,q-i✓ hereby certify under penalty of perjury that I am a civil engineer licensed in the State of Washington with specialized knowledge of geotechnical/geological engineering or a geologist or engineering geologist licensed in the State of Washington with special knowledge of the local conditions. I also certify that the Geological Assessment, dated , f Z 26/ and entitled �m pro vim c t-s Sr3C&p,/- /0(^ Yo✓c.Ofl►ci t01k meets all the requirements of the Mason County Resource Ordinance, Geologically Hazardous Areas Section, is complete and true, that the assessment demonstrates conclusively that the risks posed by the landslide hazard can be mitigated through the included geotechnical design recommendations,and that all hazards are mitigated in such a manner as to prevent harm to property and public health and safety. of Wash;. ngineering Geologist Ala Se d Geo�o (Signature and Stamp) Curtis Dean Cushman Page 2 of 2 Disclaimer. Mason County does not certify the quality of the work done in this Geological Assessment. GE042ZO -00D1 � Mason County Review Checklist For a Geological Assessment Instructions: This checklist is intended to assist Staff in the review of a Geological Assessment.Ihe Assessment is reviewed for completeness with respect to the Resource Ordinance. If an item is found to be not applicable, the report should explain the basis for the conclusion.The Assessment is also reviewed for clarity and consistency. If the drawings, discussion, or recommendations are not understandable,they should be clarified. if they do not appear internally consistent or consistent with the application or observations on site,this needs to be corrected or explained. If resolution is not achieved with the author, staff should refer the case to the Planning Manager or Director. Applicant's Name: l 'K L 0 S 9Do4 P*r e, e Z Permit#: Y/LM D fl0/-�5 Parcel#'s: �5- 2 U Z 1 "5(0 — D/ P I Date(s)of the Document(s)reviewed: 1. A discussion of geologic conditions in the general vicinity of the proposed development,with geologic unit designation based on referenced maps. OK? Comment: 2. (a) A discussion of the ground water conditions at the site, OK? Comment: (b) A discussion of the estimated depth to water, OK? \/ Comment: (c) A discussion of the quantity of surface seepage,- OK? ',� Comment: (d) A discussion of the upslope geomorphology, OK?_�_Comment: (e) A discussion of location of upland waterbodies and wetlands. OK? _Comment: 3. The approximate depth to hard or dense competent soil, e.g.glacial till or outwash sand. OK? r✓ Comment: 4. A discussion of any geomorphic expression of past slope instability(presence of hummocky ground or ground cracks, terraced topography indicative of landslide block movement, bowed or arched trees indicating downslope movement,etc.). OK? 1/ Comment: 5. A discussion of the history of landslide activity in the vicinity, as available in the referenced maps and records. OK? ✓ Comment: 6. An opinion on whether the proposed development is within the landslide hazard area or its associated buffer or setback and the potential for landslide activity at the site in light of the proposed development. OK?_�_Comment: 7. A recommendation by the preparer whether a Geotechnical-Report should be required to further evaluate site conditions and the proposed development of the subject property. OK? ✓ Comment: 8. If the presence of a hazard is determined within 300 feet of the proposed development, then the following are delineated on a geologic map/site map: Pagel of 2 Form Effective June 2008 (a) the area of the proposed development, OK? Comment: (b) the boundaries of the landslide hazard area(top, both sides, and toe), OK? Comment: •(c) the associated buffers (top, both sides, and toe) OK? Comment: (d) building or other setbacks (top, both sides, and toe). OK? Comment: 9. A site map drawn to scale showing the property boundaries, scale, north arrow, and the location and nature of existing and proposed development on the site. OK? ✓ Comment: Are the Documents signed and stamped? �`� By whom?r V1 A ` L> "� cse type: C G License�: 2 I_iin FIRST REVIEW Approved ❑ Need more info. If not approved, what is the next action/recommendation for further action? Of Reviewed by , on ZV�.Time spent in review: SECOND REVIEW/UPDATE ❑ Approved ❑ Need more info. If not approved, what is the next action/recommendation for further action? Reviewed by , on Time spent in second review: THIRD REVIEW/UPDATE ❑ Approved ❑ Need more info. If not approved, what is the next action/recommendation for further action? Reviewed by , on .Time spent in third review: Disclaimer. Mason County does not certify the quality of the work done in this Geological Assessment Page 2 of 2 Form Effective June 2008