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HomeMy WebLinkAboutFPA2006-00026 SEP2006-00128 - FPA Permit / Conditions - 6/6/2010 MASON COUNTY DEPARTMENT OF COMMUNITY DEVELOPMENT Mason County Bldg. III, 426 West Cedar Street - PO Box 186, Shelton,WA 98584 18s4 `v www.co.mason.wa.us (360)427-9670 Belfair(360)275-4467 Elma (360)482-5269 FOREST PRACTICES APPLICATION/NOTIFICATION Type IV General This application should be accompanied with an Environmental Checklist (SEPA) as well as an activity map/site plan which addresses items listed below. TYPE OR PRINT IN INK: 1. Landowner,Timber Owner and Operator information. Legal Name of LANDOWNER Legal Name of TIMBER OWNER Legal Name of OPERATOR Re a F l r5L-o Sra C-<<'nr C'- R I✓'6 f I&zw S To C[<LA" co �t`� c t PA(;I OR G, 9 90 S W Lj tiF,cq P O2, K W City, State,Zip City, State,Zip City, State,Zip 6L4b1PtA, 1,uA , Phone(3(.o) 3 3 4- Z 7b$ Phone( ) Phone(3to r4`Z7--c C*6 Email: C.STOC l&r. Email: Email: C o M cArsr, N Ic r 2. Contact person information. Contact Person Phon 9 - 2 7 D$ R eD F I;ELb STV r-(<1 ej C=. Email: RC,%Tb C Kt,U V GQ It•! C`�SZ' aJE7 3. If you are harvesting timber,enter the Forest Tax Reporting Account Number of the Timber Owner: S dC� 067 215 For tax reporting information or to receive a tax number,call the Department of Revenue at(800)548-8829. C escription w er st practices will occur. Number Sub Di ion '/<'/. Section Townshi Ran e E/W SI-06D13 / Es 5. Answer each question as it applies to your proposed forest practice. a. W No. [] Yes. Is the activity within an urban growth area? b. VNo. [] Yes. Is the activity within a public park? C. b4 No. [] Yes. Is the activity within 500 feet of a public park? Park name: d. []No. C4 Yes. Is the activity located on lands platted after January 1, 1960? e. []No. hf Yes. Is the activity within 200 feet of saltwater lake river/creek/stream pond wetland seasonal runoff slopes which exceed 15%? k f. What is the expected duration of FPA? el Proposed start date: C)!O G Proposed end date: ( b O r. Page 1 of 4 6. Are you cutting or removing timber? []No. Yes. Complete the table below and identify all timber harvest and salvage activity boundaries on the activity map. Acres Volume to be Steepest Slope in Unit# Harvest Type Yarding Method net Harvested mbf) Harvest Unit(%) 7. Are you constructing or abandoning roads? []No. Yes. Complete the table below. Show locations and identify all road activities on the activity map. AY Total Length Steepest Side Slope Abandonment Date Type of Activity feet % Mo/Yr Road Construction D9e4`N61 A 1 Temporary Road Construction Road Abandonment Work in or over typed water may require a Hydraulic Project Approval(HPA)from the Washington Department of Fish and Wildlife (WDFW). If you have questions concerning the HPA,visit the WDFW website at www.wdfw.wa.eovihabitat.htm. ZNo. [] Yes. Complete the table below. Show locations and identify all proposed water-crossings on the activity map. Crossing Crossing Dimensions Crossing Crossing Dimensions Identifier Type (width x length) Identifier Type (width x length) 9. Mark the following activities that will be done in or over typed water. N A Activity in or over: Type I Stream Type II Stream Type III Stream Type IV Stream Type V Stream Removing culverts of bridges Equipment crossing Ground skidding Suspending cables Cable yarding Falling and bucking Other 10. Is any activity in a wetland or wetland buffer? 'KNo. [] Yes. Complete the table below. Show locations and identify all wetlands and buffers on the activity map. Wetland Wetland Type Activity Type in Activity Type in Total Wetland Total Area Total Area Identifier (I,II,III,IV, Wetland Buffer Area(acres) Drained(acres) Filled(acres) other) 11. Describe how the following are identified on the ground. • Harvest boundaries/unit corners: ALI_ -To t6 - cy T- Me ltvt c4-6 ( IPL u l( ,(LI$,@ 04) • Right-of-way limits and centerlines for road work,culverts and bridges: c- I f1C • Critical areas and critical area buffer boundaries: �\ Page 2 of 4 12. Have you reviewed this forest practices activity area to determine whether it may involve historic sites and/or Native American cultural resources? []No. XYes. '13. We affirm that the information contained herein is true,and understand that this proposed forest practice is subject to the Forest Practices Act and Rules and Mason County Forest Practices Conversion Ordinance as well as all other federal,state or local regulations. Compliance with the Forest Practices Act and Rules and the Mason County Forest Practices Conversion Ordinance does not ensure compliance with the Endangered Species Act or other federal state or local laws. Signature of LANDOWNER Signature of TIMBER OWNER Signature of OPERATOR (if different than landowner) (If different that landowner) Print name: R��� � STOC-4-<1f�'� Print name: Print name: Date: g /it / O(; Date: Date: Additional information: (Optional) Per Mason County Ordinance 11.05, Section 11.05.120,a site map shall accompany this application which includes the following information. I Harvest boundaries and tree retention areas. II The approximate location of any structures. III The location of all existing and proposed streets,right-of-ways, easements, skid roads,haul roads, and landings within the proposal. IV The location of future land development including stormwater management facilities and vegetation to be retained for site landscaping, open space,wildlife habitat, screening, and/or buffers. V Site topography at contour intervals of 40 feet. VI Critical areas and critical area buffers regulated pursuant to the Critical Areas Ordinance. VII Drainage ways and culverts. VIII Site area targeted for further harvest including proposed timing. IX North arrow and scale shall be shown on all site plans.The scale shall be no smaller than one inch to 2 100 feet. Staff asks that, at a minimum,the corners of the harvest unit(s)be flagged for clear identification. Page 3 of 4 FPA FEE: $200.00 with SEPA SEPA FEE: 0-9.99 Acres$510 $300.00 without SEPA 10 to 20 Acres$610 Over 20 Acres$765 10 to 20 Acres$610 EIS(DS)$2040+55/hr Departmental Review (For Office Use Only) Site visit: Date approved (� — — Mason u y Community Development I:PLANNINGTACTPA.DOC 05-02-2006 Page 4 of 4 FINDINGS OF FACT FPA Case # 2006-00026 APPLICANT: Redfield Stocking APPLICATION DATE: August 29, 2006 Mason County has reviewed the above referenced application for Class IV General Forest Practices and finds it in conformance with all applicable County land use regulations in effect at the time of application. FINDINGS The proposed FPA is compliant with the following conditions: The proponent has paid the prescribed fees. The proponent has filed a complete, signed application. A map has been received that complies with the requirements of 11.05.120: (I) Harvest boundaries and tree retention areas. (II)The approximate location of any structures. (III)The location of all existing and proposed streets, right-of-ways, easements, skid roads, haul roads, and landings within the proposal. (IV)The location of future land development including stormwater management facilities and vegetation to be retained for site landscaping, open space, wildlife habitat, screening, and/or buffers. (V) Site topography at contour intervals of 40 feet. (VI) Critical areas and critical area buffers regulated pursuant to the Critical Areas Ordinance. (VII) Drainage ways and culverts. (VIII) Site area targeted for further harvest including proposed timing. (IX) North arrow and scale shall be shown on all site plans. The scale shall be no smaller than one inch to 200 feet. That this FPA is in conformance with the following Mason County ordinances: 11.05 That the proposed FPA involves 0.50 acres. That the notifications required by 11.05.060 have been made if applicable. Note:Not applicable in this case. Mason County Resource Ordinance _X_That at the issuance of this permit will not result in a violation of the Mason County Resource Lands and Critical Areas Ordinance. The site was inspected by Tammi Clark of the Mason County Planning Department who has determined that any critical area buffer and/or steep slope issues have been resolved. Geo-Technical Report/Assessment Review A Geo-Technical _ Assessment_X_ Report (check one) Washington State Department of Transportation _X_A DOT Access Permit is not required for this proposal. A DOT Access Permit is required for this proposal. Date Approved by DOT: N/A Shoreline Master Program That, if applicable, all activity under this application are in conformance with the Mason County Shoreline Master Program and has a shore line designation of N/A. State Environmental Policy Act This application for FPA # 2006-00018: _X_ Has been reviewed for SEPA compliance under case #: SEP 2006-00128. Is SEPA exempt. _ DNS X MDNS CONCLUSION In conclusion, this application for Class IV General Forest Practices is consistent with the above criteria and that the public uses and Mason County has fulfilled its statutory obligations. RECOMMENDATIONS I, being the Manager of the Mason County Planning Department, hereby attest to and certify that appropriate provisions have been made for this Class IV General Forest Practices Application and hereby recommend approval. In addition these facts evidenced by the contents of the file for this Forest Practice Application. Signed, Robert Fink, Planning Manager Date Tammi Clark, Planner Date MASON COUNTY PUBLIC WORKS WORK ORDER RECEwo 3 0 2006 Permit#: FAA ' C,o , _o oif,) MASONCOUNTyPHRtIMORK Date: -irt _ L. Requested by: _ Authorized by: Type of Work: ;1&0 a) Arv, �J v lthr- Public Works employee in charge: � , I CHARGE TO: Name: f Sk) Billing Address: JJ Phone: x WORK PERFORMED: Employee: kvr Date: Hours: /, 0 Hourly Rate: (; Total: ACCOUNTS RECEIVABLE INFO: Billed Date: Invoice #: Amount Billed: Receipt # Date: Amount Paid: MASON COUNTY PUBLIC WORKS DIRECTOR/COUNTY ROAD ENGINEER Shelton, Washington 98584 DATE: October 3, 2006 INTER-DEPARTMENTAL COMMUNICATIONS TO: Tammi Clark PARCEL # 42333-51-03013 FROM: John Sliva, Programs Engineer-PW BUILDING PERMIT NUMBER: FPA2006-00026 SUBJECT: FPA Stormwater Site Plan and Geo Review NAME: Redfield Stocking Tammi, The Stormwater Site Plan (SSP)and Geotechnical Report prepared for the proposed partial timber harvest off Forest Service Road 2300 near Lake Cushman has been received and reviewed by Public Works. The lot is 5 acres. The property has varying slopes ranging from 20-45%. The plan provided a drawing showing areas where trees are to be removed for a future residential development. Construction and completion of the proposed improvements are not expected to result in any adverse on-site, or off-site impacts. A stormwater runoff plan was presented. Straw barriers and silt fences will be incorporated into areas where stormwater can get into ditches or access roads. Buffers along the property lines will be provided. The author makes note that the plan provides an adequate vegetated buffer area to protect neighboring properties and State Waters from adverse stormwater runoff impacts. The SSP may be considered adequate as submitted. Adequate erosion and sediment control features need to be implemented during land disturbing activities to protect neighboring properties and State waters from adverse stormwater runoff impacts. The migration or release of silty water or mud from the applicant's property will be considered a violation of County and State water quality protection regulations. Recommendations contained in the report should be incorporated into the site's harvest operation and made conditions for permit issuance. Please feel free to contact me at 724 if you have any questions regarding these comments, or if you feel any features need further discussion or attention. {� Sincerely, - John Sliva Programs Engineer TAHJA ENGINEERING, Inc. PO Box 235, Hoodsport, WA 98548 (360) 877-9512 Mason County DCD Planning Division PO Box 279 Shelton, WA 98584 Redfield Stocking 9805 Whitecap Drive NW Olympia, WA 98502 (360) 339-2705 RE: Geotechnical Report Case No. Parcel No. 42333-51-03013 Cushman Eastside 1, Blk 3, Lot 13 Forest Service Road No. 2300 Hoodsport, WA 98548 INTRODUCTION I was contacted by Redfield"Red" Stocking early this year and was requested to investigate and document slope stability and landslide hazard issues relating to the residential development of Mason County Property Tax Parcel Number 42333-51-03013, otherwise know as the assessor's plat of Lake Cushman—Eastside No.1, Block 3, Lot 13 located on Forest Service Road 2300. The property is located approximately 1-1/4 miles up the Dow Mountain Road behind the Lake Cushman Maintenance Office which is located approximately 4 miles west of Hoodsport on the Cushman Road(SR-119). The property is a five acre parcel measuring roughly 930'+ along its long/north-south axis, and roughly 240' along its east-west axis. Property dimensions are shown on the attached site plan. The Stockings wish to develop the property with a three bedroom residence. A three bedroom On-site Septic System (OSS) design is being developed. The following ten elements are required by Mason County to be addressed in geotechnical reports prepared to comply with Mason County's Critical Resource Ordinance Sections 17.01.100 through 17.01.104 1. SURFACE AND GEOLOGIC CONDITIONS: The property has been logged in the past, and has medium aged second growth fir, hemlock, and cedar tress growing evenly throughout the property. Besides the conifers, File:C:IProjectslStockinglGeolGeo-Rpt.doc 1 of 5 5/11/2006 TAHJA ENGINEERING, Inc. PO Box 235, Hoodsport, WA 98548 (360) 877-9512 the property has Maple, Alder, Vine Maple, and a moderate covering of Salal, Oregon grape, ferns, and other vegetation. The Series 1950, No. 9 SOIL SURVEY of Mason County indicates the site soils are Classified as Rc which is described as "rough mountainous land, Hoodsport soil material". These soils typically result from the weathering of the glacial till soils found underlying much of the area. Fractured and solid basalt rock is typically found from depths of a few feet to 30 to 50' beneath the till layer(s). The Hoodsport soil types are prone to neither erosion, or liquefaction, and are not listed in Mason County's Resource Ordinance as an erodible soil or an erosion hazard. The Hoodsport soils are typically describes as excessively drained, and typically are composed of a fairly high percentage of cobbles or gravels. The soil is also comprised of varying ratios of fines, including silts and clays, which may comprise as high as 12 or 15% of the soil volume. The soils on the Stocking site contain a moderate amount of fines, along with a random mixture of sand, gravels and cobbles, and are generally the weathered surface of the glacial till soils underlying the whole region. The soil provides good foundation support in its undisturbed state, but must be properly placed and compacted if fill sections are expected to provide reliable bearing. The northerly third of the property contains slopes ranging from 20 to 30%. The southerly two-thirds of the property lies on slopes generally averaging 30 to 45% slopes. The main property development is planned on the northerly portion of the property. Development on the southerly part of the property is not planned at this time other than pioneering in a short road and flat area to accommodate a water well. If this is pursued, the road and landing would be located not far south from the Forest Service Road. A conjectural well location is shown on the plan sheet. The well may also be placed somewhere in the northerly area of the property, but this decision is still being made. Further consideration of the soils found on site lead to describing the soils in terms of the Unified Soil Classification System (USCS) criteria, and describing the soils as a GP (gap-graded gravels or uniform gravels, sandy gravels), or even more likely as GM (silty gravels, silty sandy gravels). These soil designations were used in characterizing the soil for stability analysis. 2. DEVELOPMENT AND GEOLOGIC FEATURES: A site plan has been developed for this property and is attached in the appendixes. The final location and size of the planned residence is still being finalized. Though the property contains slopes in the 40%+range,they roughly represent the underlying glacial till surface, and may be considered very stable. 3. LOCATIONS OF LOGS OF EXPLORATORY HOLES OR PROBES: An inspection of the slopes and cuts in the subject property's vicinity was performed and compared with the Mason County Soil Survey soil descriptions. The cuts and soil layers observed around the area confirm the soils as generally being medium dense soil horizons of weathered Vashon glacial till to a depth around 3-feet where it becomes more dense and can File: C:•ProjectslStockinglGeolGeo-Rpt.doc 2 of 5 5/11/2006 TAHJA ENGINEERING, Inc. PO Box 235, Hoodsport, WA 98548 (360) 877-9512 be characterized as hardpan. The soil logs dug for designing the On-Site Septic System design found permeable soils to depths of 60 plus inches in the primary drainfield area, and a minimum 36 inches in the proposed reserve drainfield (DF) area. 4. CROSS SECTION WITH PROPOSED GRADE CHANGES: A cross section is included in the appendix. Grade changes will mainly be for the purpose of constructing an access driveway from the Forest Service Road to the proposed building area, and the leveling of the building area itself. The proposed residence will be excavated into the hillside, with the entire foundation sited on undisturbed native soil, mainly the till layer. The yard area in front(to the south) of the residence may be enlarged by wasting the soils produced from excavating the structures' basement or foundations. Any fill placed on the property will be placed in compliance with the County's grading ordinance requirements, which require fill placed on slopes steeper than 20% , to be place on a level bench excavated for the purpose of providing a stable area to construct the engineered fill slope on. Fill receiving areas will be cleared of vegetation, and a level bench, a minimum of 6-feet wide, will be excavated so that the fill slope may be constructed in uniform 6 to 12"thick"lifts"of fill soil, compacted to 90+% compaction before subsequent lifts of fill are placed. Fill slopes constructed in this manner, may be constructed to the County's standard 2:1 (H:V 50%) fill slope geometry. Excavation on the uphill side of the road, and for the building foundation is expected to be dug out of the hardpan layer, and may be excavated at a maximum 1:1 slope (H:V). 5. SLOPE STABILITY ANALYSIS: The steepest slopes on the property in its present condition contain no obvious recent mass landslides or stability problem indicators. The proposed building area in the central area of the northerly portion of the property has no discernible irregularities, settlements, fissures, or evidence of consolidation problems. Unified Soil Classification System typing places the soils in a coarse grained soil (GM) classification with a dry density between 120-135 Ibm/ft3 and a typical effective stress friction angle (0) > 34°. The surface soil layers appear to be a relatively dirty gravel, so a GP soil classification may also be appropriate with the same dry density and phi angle. A soil density of 130 lbs/ft3 will be used in the stability analysis. Slope stability calculations are addressed on an Excel spreadsheet following the plans. A phi angle of 36' for the soil internal friction angle was used along with a cohesion value of 300 lbs per ft2. The glacial till soils can be modeled with cohesion values as high as 1000 lbs per ft2, and with internal friction angles above 40°, so the analysis is based on conservative assumptions. Foundations bearing on the medium dense and dense Hoodsport gravelly sandy loams can expect to realize bearing capacities of the natural soil in the 1000 to 2000 pounds per square foot range, with settlement for residential foundations within half an inch overall. File:C:IProjectslStockinglGeolGeo-Rpt.doc 3 of 5 5/11/2006 TAHJA ENGINEERING, Inc. PO Box 235, Hoodsport, WA 98548 (360) 877-9512 6. RECOMMENDED SETBACKS & DRAINAGE: The property contains only isolated areas of relatively level ground, and will require construction on what may be classified as potentially unstable ground. No structures should be planned to be placed on fill material, unless the fill is placed as structural fill under the supervision of an engineer, or an engineering geologist. So long as the residences' footings are constructed on the natural glacial till, a building setback from the crest of the slope is not needed. Footings should be buried on their downslope side enough to protect them from freeze-thaw actions. For this area(Cushman/Olympic foothills), a minimum 18" of soil cover should be placed above all footings. Drainage from the developed property should be directed into the naturally vegetated areas of the property. Concentrated discharges of collected stormwater runoff should be avoided. Collected stormwater runoff should be dispersed as close to its source as practical and allowed to seep into the ground. Sensitive areas like the septic drainfield area should be protected from the delivery of any stormwater flows in its vicinity. Driveway runoff should be dispersed as frequently as possible into the surrounding vegetation. Water bars, and driveway cross culverts on no greater than 200' intervals should be planned as part of the property development. Roof runoff may be dispersed at downspout splash blocks, and directed away from the foundation into the yard area. 7. CLEARING, GRADING,AND VEGETATION MANAGEMENT: Clearing for the residence, a driveway, and a possible well location will be necessary for development of the property. Besides removing trees for the building and driveway footprints, danger trees (potentially threatening to the residence)may be planned to be removed. Aside from clearing and grading the property for the residence and driveway, no clearing or grading on other parts of the property is planned. Once a residence is constructed on the property, bare areas will be planted with grass and landscape plantings. Overall, it appears the development of the property will have a minor impact on the property itself, and littll or no impact to surrounding properties. 8. EROSION AND SEDIMENT CONTROL: As indicated earlier in this report,the site's soils are not considered erodible, and minimal Erosion and Sediment(E&S) Control measures should be adequate to protect neighboring properties and State waters. Access to the site will be developed off of the Forest Service Road(private), roughly a mile away from any public roads. Construction of the proposed driveway will include a driving surface of clean gravel or crushed rock. The major earthwork will be leveling the house's building location, excavating the footing trenches, and constructing the driveway. These development areas drain mainly to the owner's property, and will have approximately 20+-feet of vegetative to pass through before any runoff exits the property at its normal discharge locations. File:C:IProjectslStockinglGeolGeo-Rpt.doc 4 of 5 5/11/2006 TAHJA ENGINEERING, Inc. PO Box 235, Hoodsport, WA 98548 (360) 877-9512 The existing and proposed features should provide adequate protection against adverse stormwater runoff impacts. 9. ON-SITE AND OFF-SITE IMPACTS: Construction and completion of the proposed improvements are not expected to result in any adverse on-site, or off-site impacts. The proposed residential development of the property will not result in adverse impacts to either the subject property or to neighboring properties. 10 SPECIFICATIONS OF FINAL DEVELOPMENT CONDITIONS: The completed site will be allowed to return, for the most part, to a naturally vegetated state. The main ground cover will be lawn and medium height shrubbery. In the future development of the property, discharging concentrations of collected Stormwater runoff within 20 feet of a property boundary should be avoided. Conclusions and Summary; The residential development of the Stocking property located in the Dow Mountain area of Lake Cushman does not appear to present any stability problems that cannot be overcome,and will not result in any undesirable impacts. The property itself provides an adequate vegetated buffer area to protect neighboring properties and State Waters from adverse stormwater runoff impacts. The stormwater related recommendations made in this report should be adequate for both temporary and permanent stormwater runoff management and concerns. I hope this report meets the needs of the Stockings, and Mason County in planning the property's development. Sincerely, Alan A. Tahja, P.E. ,078& Attached: Site Plan(Plan Sheets 1 &2) Cross Section(Plan Sheet 3) Stability Analysis (Excel Spreadsheet) File: C:IProjectslStockinglGeolGeo-Rpt.doc 5 of 5 5/11/2006 Revision# Description Date TAHJA ENGINEERING,Inc. STOCKING SITE PLAN ftmb Alan Tahja,P.E. Redfield Stocking Stocking PO Box 235 9805 Whitecap Drive NW asp Hoodsport, WA 98548 Olympia, WA 98502 1 of 3 County Prcl No. 42333 5103013 (360)877-9512 (360) 339-2705 10 V O Lt t ' it it 9kIj �tttt4Stittiij \ , C •�.� l t jai tt��tilt�tl / car 1t tttt Stltllst�' > '✓' :� � � �` i 1ltittt .� �t 0 � t G.1 �� 1t Zt} ` 00 15��• ti ti, - 0.r t r ,' i� A C> C� j: tl itt4 is t y r t t > O '�1t4 ti�ttttt it fit\ ? iP ' r �0 U, F r 1 Si I�ttlstt, (� �' k . t (}tcp 1 V Revision# Description Date TAHJA ENGINEEIZWG,Inc. STOCKING SITE PLAN ft.M Alan Tahja,P.E. Redfield Stocking Stocking PO Box 235 9805 Whitecap Drive NW Hoodsport, WA 98548 Olympia, WA 98502 2 of 3 County Pre]No. 42333 5103013 (360)877-9512 (360) 339-2705 co "C+ I Vol 'lam O v,o C 9L'ZE6 `Id •..�, � I o c � cd a a� o � o�ol 06 r. \ coof � I 1p 36'fi 'Id 4� o� 00, I °fig o OF t o 1 M 4 V I N Revision# Description Date TAHJA ENGINEERING,Inc. STOCKING SITE PLAN P4.M. Alan Tahja,P.E. Redfield Stocking Stocking PO Box 235 9805 Whitecap Drive NW skd HoodspoA WA 98548 Olympia, WA 98502 3 of 3 County No. 42333 5103013 (360)877-9512 (360) 339-2705 03 v • L r UEJ j Peo2t as tira r ' S asarod -�" peog aa�nzaS�saio3 o > .ter Cn c ' 0 L�� I U Con au p N M Stocking Stability Analysis Mason County Parcel Number 42333-51-03013 Slope Stability Analysis Section A-A Weight Slip Plane Angle: 452 kip 1200 1 1° 3470 SF Slip Plane Length=260' 1170 Normal Force 1120 0+00 0+50 1+00 1+50 2+00 2+50 3+00 3+50 4+00 - 01 A. T Factor of Safety(FS) is to be calculated against sliding -Static Conditions FS= Resisting force/Driving force _ [c'L + N'x Tan(8)]/[W x sin(a)] _ [c'L+ (W x cos(a) - U x L)x tan(0)]/[W x sin(a)] •� �78�9 where; FS = Factor of Safety against sliding xxPIRWS: 11/7/5cco � c' = drained shear strength of the slide plane (c' —300 psf for med dense glacial till 8= angle of internal friction (360 used) L= Length of slip plane surface (260') N = normal force : perpendicular to slip plane (N =W x cos(a)) W= total weight of failure wedge (130 pcf x 3470') =451,100 Ibs= 452 kip) u= average pore water pressure along the slip surface (psf) = 0 for gravelly loam sands a= Slope/Slip Plane Angle (11°) FS= [(.3 x 260)+[452 x cos(11 0)-(0 x 260)]x tan(36)]/[452 x sin(11°)] _ [(78+(443.7)(0.9816)]/86.2 = 400/86.2 =4.64 4.64 > 1.5 OK Factor of Safety (FS) against sliding - Dynamic Conditions (Seismic Factor b= 0.3) FS = [c'L+ (W x cos(a) -b x W x sin(a) - U x L)x tan(())]/[W x sin(a) + b x W x cos(a)] "=[(.3x260+(452xcos(1 1°)-.3x452xsin(11 0)-Ox260)xtan(36)]/(452xsin(11)+.3x452xcos11° _ (78 + (443.7-25.9-0)x .7265)/[86.2 + 133.1] = 381.5/219.4= 1.74 > 1 OK TAHJA ENGINEERING, Inc. 5/11/2006 MASON COUNTY DCD Sent SEPA �Dt�1B-rt�t to (check all that apply) on Skokomish Tribal Nation WA Dept. of Ecology(saltwater) Natural Resources Dept. ATTN: Shoreline Permit Reviewer ATTN: Marty Ereth Southwest Regional Office N 541 Tribal Center Rd. PO Box 47775 Shelton, WA 98584 Olympia, WA 98504-7775 Quinault Indian Nation WA Department of Ecology(freshwater) ATTN: Mark Mobbs Environmental Review Section PO Box 189 PO BOX 47703 Tahola, WA 98587 Olympia, WA 98504-7703 Squaxin Tribal Nation U.S.Army Corps of Engineers Natural Resources Dept. SEPA Reviewer 2952 SE Old Olympic Highway PO Box C-3755 Shelton, WA 98584 Seattle, WA 98124 The Confederated Tribe of the Chehalis WA Uept. of Fish and Wildlite ATTN: SEPA Reviewer ATTN: Margie Schirato(saltwater) 420 Howanut Rd. 2391 W Deegan Rd. Oakville,WA 98568 Shelton, WA 98584 Ea Courtney Wasson WA Dept. of Fish &Wildlife WA DNR, South Puget Sound Region A ATTN: Gloria Rogers (freshwater) 950 Farman Avenue North PO Box 695 Enumclaw, WA 98022-9282 Elma, WA 98541 Boyd Powers WA Dept. of Transportation WA DNR, SEPA Center Environmental Policy&Coord. PO BOX 47027 HWY Administration Bldg. Olympia,WA 98504-7027 Olympia, WA 98504 Olympic Region Clean Air Agency City of Shelton 2940-B Limited Ln. NW 525 West Cota St. Olympia,WA 98502 Shelton, WA 98584 Mason County Transit Office of Archeaology& Historic Preservation PO Box 1880 ATTN: Stephanie Kramer Shelton, WA 98584 P.O. Box 48343 Olympia,WA 98504-8343 Agent M School District Applicant Mason Cty Public Works ATTN: JohTfSTivaLWQJ Mason Cty Bid.ATTN: Mason Cty Env. Health ATTN: u st>'4"' _ e ON W I - OOO of%-STA F MASON COUNTY C DEPARTMENT OF COMMUNITY DEVELOPMENT M S° y= Planning Division ~ ° T Z N ly P O Box 279, Shelton, WA 98584 Z LZ Y �0 (360)427-9670 1864 MITIGATED DETERMINATION OF NONSIGNIFICANCE (WAC 197-11-350) SEP2006-00128 Description of Proposal: Redfield Stocking: FPA2006-00026 Clearing a space for a 24' x 48' cabin on the upper acre of a 5 acre lot. Proponent: REDFIELD STOCKING Site Address (If Assigned): Directions to Site: Parcel Number: 423335103013 Legal Description: LAKE CUSHMAN EASTSIDE #1 BLK: 3 LOT: 13 Lead Agency: Mason County The Lead Agency for this proposal has determined that it does not have a probable significant adverse impact on the environment. An Environmental Impact Statement (EIS) is not required under RCW 43.21 C.030(2)(c). This decision was made after review of a completed Environmental Checklist and other information on file with the Lead Agency. This information is available to the public upon request. MITIGATED MEASURES ARE ATTACHED. Please contact Tammi Clark at ext. 295 with any questions. This DNS is issued under WAC 197-11-340(2). The Lead Agency will not act on this proposal for 14 days from the date shown below, when the determination is final. Comments must be submitted to Dept. of Community Development, P.O. Box 279, Shelton WA 98584 by 9/13/2006. Appeal of this determination must be filed within a 14-day period following this final determination date, per Mason County Code Chapter 15.11 Appeals. Authorized Local Government Official Date MITIGATED DETERMINATION OF NONSIGNIFICANCE (WAC 197-11-350) SEP2006-00128 CONDITIONS OF THIS DETERMINATION �) Escape of silty water or mud from the timber harvest area shall be considered a violation of County and State stormwater management regulations, and could subject the applicant(s) to civil fines or penalties. The FPA permit shall not be issued before Mason County Public Works has approved a stormwater site plan for the site. X 2) The approval of this project is subject to the recommendations and specifications outlined in the attached geotechnical report or assessment. Structures and / or land modifications (grading, cuts, fills, etc.) required in the geotechnical report / assessment, may require a seperate permit. The geotechincal report/ assessment shall remain attached to the approved plans. X w , MASON CO. ENVIROMENTAL CHECKLIST A. BACKGROUND J'z33 3 - sI - 030I 3 1. Name of proposed project, if applicable: DC�-S Qur APPLY 2. Name of applicant: 3. Address and phone number of applicant and contact person: 9 90 S W (-4 c r E cA P> DR N�w ©t 41,- zV A , WA, 9 3 5 0-Z -3 Co - 3 `-S 9 - Z '7c 4. Date checklist prepared: 8 It 1 /0 5. Agency requesting checklist: Fop-RCS 1 6. Proposed timing or schedule (including phasing, if applicable): L- A-rc sC P-rEn-1�c�� o fz C)c-To)e)t---/L `0 6n 7. Do you have any plans for future expansion, or further activity related to or connected with this proposal: If yes, explain. U0 8. List any environmental information you know about that has been prepared, or will be prepared, directly related to this proposal. S(TL (Dt--A� SLl�I�C- �L-'SCCo tV 9. Do you know whether applications are pending for governmental approvals of other proposals directly affecting the property covered by your proposal? If yes, explain. N0 10. List any government approvals or permits that will be needed for your proposal, if known. �V K3 P- ��s t s PO 2 IEs i P"c.7-1 c-,S PG2I-A i T A 11. Give a brief, complete description of your proposal, including the proposed uses and the size of the project and site. There are several questions later in this checklist that ask you to describe certain aspects of your proposal. You do not need to repeat those answers on this page. (Lead agencies may modify this form to include additional specific information on project description.) 1 A PL�,)tiN COJ U Fc-)dL A Z4 S C-&e/ AJ DU THE L)P PE-(L Ac.121; GF- MY A C.(Z E dT. `C�4 E D)J L`( c�T t+t�YL C_LIE H t c N co L J!Lr L. "3 E rvi2 Tl�r`. 1�2tv� w 1, SL-' TLC Dal-4,AU P/L-LO ANO A&-, 2�'�► [ c� L_'-N b v L.&4 Ec.�2 `Ct[C W EL_L 2[ L LY2 S - 12. What is the location of the proposal? Give sufficient information for a person to understand the precise location of your proposed project including a street address, if any, and section, township, and range, if known. If a proposal would occur over a range of area, provide the range or boundaries of the site(s). Provide a legal description, site plan, vicinity map, and topographic map, if reasonably available. While you should submit any plans required by the agency, you are not required to duplicate maps or detailed plans submitted with any permit applications related to this checklist. Tl4E r2U O4�iL-T`I LS lAi Tt4 L,ALCL: CUS)46-rItA-7 E LGrOP-MGAi y o[v Dc)w P--tpvL.JTJ-[ /J , [T IS pL-scrZr6L�0 As EAsr 5[DE- z-, Gl� Lc- 13, 1- C-ATC;O a N Fc>v2,Oj s T S L—'YL V[C-E l `/4 M[Ctr`S F-VLU" Z1IC C- 4TE Dtv ©w Mo 1�1-r�rAla t2OAO 8EF4rt�� THe LA)4i✓ cu5b MAC ) o FF)CL', 4 �-C►Le-5 w�`5_► OF AUDD—SPOhz i B. ENVIRONMENTAL ELEMENTS: 1. EARTH: a. General description of the site (circle one): Flat, rolling, hilly, steep slopes mountainous, other b. What is the steepest slope on the site (approximate percent slope)? 2, 5 °lo C�IJ -Tl+C R2�,A iv 6L: L'LL/►fLL—'0 . 4Z "/v C��U TO Low LPL Sc�TrUN c.Dp 0aUfikvLT�( cu�tc,c1 WILL t\XT AC L UAL-U1P L--►� , C. Wha general types of soils are found on the site (for example, clay, sand, gravel, peat, muck)? If you know the classification of agricultural soils, specify them and note any prime farmland. �FfZbM �t rt<�L-i �.��cnc, 2�o�2-r : �2c��N E-touNr���G� s LAAjp p004sPCVZ7, sC>[L tl-- r L d. Are there surface indications or history of unstable soils in the immediate vicinity: If so, describe. Iv D Mason County Environmental Checklist Page 2 e. Describe the purpose, type, and approximate quantities of any filling or grading proposed. Indicate source of fill. Cl L L . R�+fir by (,,,k,L,-4 A v F._-z,rr o A—) f. Could erosion occur as a result of clearing, construction, or use: If so, generally describe. L.o.v G S L LU c V 0 S l v�l r k: C LZt 16c-N I��, /'ZL��-)12T g. About what percent of the site will be covered with impervious surfaces after project constructions (for example, asphalt or buildings)? L THfal,J h. Proposed measures to reduce or control erosion, or other impacts to the earth, if any: Y 2. AIR: a. What types of emissions to the air would result from the proposal (i.e. dust, automobile, odors, industrial wood smoke) during construction and when the project is completed? If any, generally describe and give approximate quantities, if known. b. Are there any off-site sources of emissions or odor that may affect your proposal? If so, generally describe. K,( Mason County Environmental Checklist Page 3 C. Proposed measures to reduce or control emissions or other impacts to air, if any: 3 WATER: a. Surface: 1) Is there any surface water body on or in the immediate vicinity of the site (including year-round and seasonal streams, saltwater, lakes, ponds, wetlands)? If yes, describe type and provide names. If appropriate, state what stream or river it flows into. 2) Will the project require any work over, in, or adjacent to (within 200 feet) the described waters? If yes, please describe and attach available plans. 3) Estimate the amount of fill and dredge material that would be placed in or removed from surface water or wetlands and indicate the area of the site that would be affected. Indicate the source of fill material. 4) Will the proposal require surface water withdrawals or diversions? Give general description, purpose, and approximate quantities if known. � � II Mason County Environmental Checklist Page 4 5) Does the proposal lie within a 100-year floodplain? If so, note location on the site plan. 6) Does the proposal involve any discharges of waste materials to surface waters? If so, describe the type of waste and anticipated volume of discharge. b. Ground: 1) Will ground water be withdrawn, or will water be discharged to ground water? Give general description, purpose, and approximate quantities, if known. 2) Describe waste material that will be discharged into the ground from septic tanks or other sources, if any (for example; domestic sewage, industrial, containing the following chemicals..., agricultural, etc.). Describe the general size of the system, the number of such systems, the number of houses to be served (if applicable), or the number of animals or humans the system(s) are expected to serve. lOv CaL-C t-AM I L\4 S�10TI L S'I S-I -( C. Water runoff (including storm water): 1) Describe the source of runoff(including storm water) and method of collection and disposal, if any (include quantities, if known). Where will this water flow? Will this flow into other waters? If so, describe. t`�►'` i I\ c t=- �(Le CIA 61 rl OcrL 2t t,) '�" y (L c-7-A 2) Could waste materials enter ground or surface waters: If so, generally describe. Mason County Environmental Checklist Page 5 d. Proposed measures to reduce or control surface, ground, and runoff water impacts, if any: XT f A�i L�'Lv l� 'T C) T L ScpC� 4. PLANTS: a. Check or circle types of vegetation.found on the site: deciduous tree:4ider, r iaple,`aspen, other evergreen tree~ m, edar:pine, other Ll�'LL 0C- __. _... C� .- s shrubs grass pasture crop or grain wet soil plants: cattail, buttercup, bullrush, skunk cabbage, other water plants: water lily, eelgrass, milfoil, other other types of vegetation 5L-;/U- A L ( O/2E-G,Opj C(ZAIOE b. What kind and amount of vegetation will be removed or altered? C. List threatened or endangered species known to be on or near the site. N a r`"Ip':7 d. Proposed landscaping, use of native plants, or other measures to preserve or enhance vegetation on the site, if any: Aki`V /VL�AS W ITFOLf-1 �-D���` �� �t�L L t rcj Cn12 A-S S . �,��c,!�Q Ll lc 7 0 f l fV C, [kj jVk D t2.L t,3A-, ( V4L- f `A A T-5 G l f UjAK.) I `r2lC �2UrL' 27' t � s Mason County Environmental Checklist Page 6 5. ANIMALS a. Circle any birds and animals which have been observed on or near the site or are known to be on or near the site: j�t�. � 5C> �A{L A i L + y Ak it A4 t Birds: hawk, heron, eagle, songbirds, other Mammals: deer, bear, elk, beaver, other Fish: bass, salmon, trout, herring, shellfish, other b. List any threatened or endangered species known to be on or near the site. �j�tvC C. Is the site part of a migration route? If so, explain. d. Proposed measures to preserve or enhance wildlife, if any: 6. ENERGY AND NATURAL RESOURCES: a. What kinds of energy (electric, natural gas, oil, wood stove, solar) will be used to meet the completed project's energy needs? Describe whether it will be used for heating, manufacturing, etc. 0 �t)U C. b. Would your project affect the potential use of solar energy by adjacent properties: If so, generally describe. C. What kinds of energy conservation features are included in the plans of this proposal? List other proposed measures to reduce or control energy impacts, if any: L CC) Mason County Environmental Checklist Page 7 7. ENVIRONMENTAL HEALTH: a. Are there any environmental health hazards, including exposure to toxic chemicals, risk of fire and explosion, spill, or hazardous waste, that could occur as a result of this proposal? If so, describe. 1) Describe special emergency services that might be required. r, 2) Proposed measures to reduce or control environmental health hazards, if any: b. Noise. 1) What types of noise exist in the area which may affect your project (for example: traffic, equipment, operation, other)? 2) What types and levels of noise would be created by or associated with the project on a short-term or a long-term basis (for example: traffic, construction, operation, other)? Indicate what hour's noise would come from the site. Ll/// G, 11t \ C.....Ki C .A. i' r C .ta('�/ /`,i ✓��tl bA I 'T'1 M.L 3) Proposed measures to reduce or control noise impacts, if any: Nome 8. LAND AND SHORELINE USE: a. What is the current use of the site and adjacent properties? -2E.- It CE Mason County Environmental Checklist Page 8 b. Has the site been used for agriculture? If so, describe. C. Describe any structures on the site. d. Will any structures be demolished? If so, what? e. What is the current zoning classification of the site? -T �. f. What is the current comprehensive Ian designation of the site? g. If applicable, what is the current Shoreline Master Program designation of the site? h. Has any part of the site been classified as an "environmentally sensitive" area? If so, specify. t' » f.. i. Approximately how many people would reside or work in the completed project? j. Approximately how many people would the completed project displace? k. Proposed measures to avoid or reduce displacement impacts, if any: Mason County Environmental Checklist Page 9 I. Proposed measures to ensure the proposal is compatible with existing and projected land uses and plans, if any: mO of. 9. HOUSING: a. Approximately how many units would be provided, if any? Indicate whether high, middle, or low-income housing. b. Approximately how many units, if any, would be eliminated? Indicate whether high, middle, or low-income housing. C. Proposed measures to reduce or control housing impacts, if any: 10. AESTHETICS: a. What is the tallest height of any proposed structure(s), not including antennas; what is the principal exterior building material(s) proposed? Lb b. What views in the immediate vicinity would be altered or obstructed? C. Proposed measures to reduce or control aesthetic impacts, if any: Mason County Environmental Checklist Page 10 11. LIGHT AND GLARE a. What type of light or glare will the proposal produce? What time of day would it mainly occur? b. Could light or glare from the finished project be a safety hazard or interfere with views? C. What existing off-site sources of light or glare may affect your proposal: .N � k) d. Proposed measures to reduce or control light and glare impacts, if any: 12. RECREATION: a. What designated and informal recreational opportunities are in the immediate vicinity? b. Would the proposed project displace any existing recreational uses? If so, describe. �s C. Proposed measures to reduce or control impacts on recreation, including recreation opportunities to be provided by the project or applicant, if any: � A Mason County Environmental Checklist Page 11 13. HISTORIC AND CULTURAL PRESERVATION: a. Are there any places or objects listed on, or proposed for, national, state, or local preservation registers known to be on or next to the site? If so, generally describe. 0 b. Generally describe any landmarks or evidence of historic, archaeological, scientific, or cultural importance known to be on or next to the site. NA C. Proposed measures to reduce or control impacts, if any: A 14. TRANSPORTATION: a. Identify public streets and highways serving the site and describe proposed access to the existing street system. Show on site plans, if any. r u tZ O- -;�, �ZL f 3 b. Is site currently served by public transit? If not, what is the approximate distance to the existing street system? Show on site plans, if any. C. How many parking spaces would the completed project have? How many would the project eliminate? d. Will the proposal require any new roads or streets, or improvements to existing roads or streets, not including driveways? If so, generally describe (indicate whether public or private). N0 Mason County Environmental Checklist Page 12 e. Will the project use (or occur in the immediate vicinity of) water, rail, or air transportation? If so, generally describe. N f. How many vehicular trips per day would be generated by the completed project: If known, indicate when peak volumes would occur. NA g. Proposed measures to reduce or control transportation impacts, if any: 15. PUBLIC SERVICES: a. Would the project result in an increased need for public service (for example: fire protection, police protection, health care, schools, other)? If so, generally describe: N0 b. Proposed measures to reduce or control direct impacts on public services, if any: Mason County Environmental Checklist Page 13 16. UTILITIES: a. Circle utilities currently available at the site: electricity, natural gas, water, refuse service, telephone, sanitary sewer, septic system other: T t C- W i t-- (,),'A 71 YL, We&C— t" Fv iU ILL; b. Describe the utilities that are proposed for the project, the utility providing the service, and the general construction activities on the site or in the immediate vicinity which might be needed. Signature: The above answers are true and complete to the best of my knowledge. I understand that the lead agency is relying on them to make its decision. Signature: L Date submitted: Mason County Environmental Checklist Page 14