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02-100762 • • Ciof Federe:1 Commun ty De elop an Services Building - Single Family Permit #:02 - 100762 - 00 - SF 33530 1st Way S Federal Way,WA 98003-6210 Ph:253.661.4000 Fax:253.661.4129 Inspection request line: 253.835.3050 Project Name: CHAVEZ Project Address: 4260 SW 331ST PL Parcel Number: 327905 0010 Project Description: NSF-Construct new home with attached garage,including plumbing&mechanical. 4 bedrooms,. Proposed selling price: $425,000 Revised to convert unfinished basement to finished recreation room. Owner Applicant Contractor Lender MARTIN CHAVEZ MARTIN CHAVEZ MARTIN CHAVEZ FIRST HORIZON MORTGAGE 33400 28TH PL SW 33400 28TH PL SW FEDERAL WAY WA 98023 FEDERAL WAY WA 98023 33400 28TH PL SW FEDERAL WAY WA 98023 Includes: Census category: 101 -New si #1 #2 #3 #4 Occupancy Group: R-3 U-1 Construction Type: Type V-N Type V-N Occupancy Load:` Floor Area(Sq.Ft.): 1st Floor Proposed Sq.Feet 1532 2nd Floor Proposed Sq.Feet 1310 Basement Proposed Sq.Feet 1588 Basic Plan` No Census Category 101-New single family house Construction Type#2.. Type V-N Deck Proposed Sq.Feet 320 Garage Proposed Sq.Feet 932 Height of Structure 33.5 Mechanical Yes Occupancy Group#1 R-3 Occupancy Group#2 U-1 Other Proposed Sq.Feet 68 Plumbing Yes Total Building Sq.Feet 5420 Total Proposed Sq.Feet 5420 Zoning Designation RS 7.2 Plumbing Fixtures Off©l sOpt .,S. !.1'4,1,111',!,4 escr ptlon u fit EICM110010liontzetg Quant ty Dishwashers 1 Gas Pipe Outlets 7 Bathtubs 3 Lavatories 4 Water Heaters 1 Showers 2 Sinks 7 Mechanical Fixtures krilDWaticiWile Quantity Descripttion ; Qu nt� 0escri do _ Boilers I Fans 7 BBQs 1 Furnaces 1 Ranges 1 Gas Logs 3 Hoods 1 CONDITIONS: 1.No building shall encroach onto any building setback line or easement shown or not shown. 2.Maximum building height is 30' above average building elevation,per Federal Way City Ordinance#90-51. 3.Driveway shall be paved per FWCC, Sec.22-1453.Driveway shall be paved from existing roadway pavement edge,or curb,to garage or carport. 4.Max. driveway width is 30 feet. 5.Building setbacks are:20 feet front; 5 feet side; 5 feet rear. 6.Prior to any clearing or grading on lot,owner/builder shall install temporary erosion/sedimentation control facilities approved by the City.These facilities must ensure that dirt or sediment laden water does not enter the public drainage system,adjacent lots or public streets. Owner/builder bears responsibility to maintain facilities in proper working order,replacing as necessary.Facilities may be removed only after such time as construction is complete&landscaping is installed.See attached for standards&site plan for location 0 .acing. 7.Per F ,Sec.22-1133(4),eaves,chimneys or awni &similar elements kuf stY'c ure that '- customarily d beyond exteriorlli of structure may extend up to 18"MAX.iliPirrequired yard setback.A_iditioaally, total horizontal dimensions of elements that extend into required yard,excluding eaves,may not exceed 25%of structure's facade length from which elements extend. 8.This decision shall not waive compliance with future City of Federal Way codes,policies,or standards relating to the subject proposal. 9.All building downspouts,footing drains&drains from all impervious surfaces such as patios&driveways shall be connected to approved storm drain outlet as shown on approved construction drawings.All connections of the drains must be constructed&approved prior to final inspection of building. PERMIT EXPIRES September 30,2003. Permit issued on June 5,2002 I hereby certify that the above information is correct and that the construction on the above described property and the occupancy and the use will be in accordance with the laws,rules and regulations of the State of Washington and the City of Federal Way. Owner or agent: i Date: 3�6.3 ay Co • nununityy of FeDe Development Services Building - Single Family Permit #:02 - 100762 - 00 - SF 33530 1st Way S Federal Way,WA 98003-6210, Ph:253.661.4000 Fax:253.661.4129 Inspection request line: 253.835.3050 Project Name: CHAVEZ Project Address: 4260 SW 331ST PL Parcel Number: 327905 0010 Project Description: NSF-Construct new home with attached garage,including plumbing&mechanical. 4 bedrooms. Proposed selling price: $425,000 Owner Applicant Contractor Lender MARTIN CHAVEZ MARTIN CHAVEZ MARTIN CHAVEZ FIRST HORIZON MORTGAGE 33400 28TH PL SW 33400 28TH PL SW FEDERAL WAY WA 98023 FEDERAL WAY WA 98023 33400 28TH PL SW FEDERAL WAY WA 98023 Includes: Census category: 101 -New si #1 #2 _ #3 #4 Occupancy Group: R-3 U-1 1 ---� Construction Type: Type V-N Type V-N Occupancy Load: Floor Area(Sq.Ft.): 1st Floor Proposed Sq.Feet 1532 2nd Floor Proposed Sq.Feet 1310 Basement Proposed Sq.Feet 1588 Basic Plan No Census Category 101-New singe family hoes( Construction Type#2 Type V-N Deck Proposed Sq.Feet 320 Garage Proposed Sq.Feet ' 932 Height of Structure 33.5 Mechanical • Yes Occupancy Group#1 R-3 Occupancy Group#2 U-1 Other Proposed Sq.Feet 68 Plumbing Yes Total Building Sq.Feet 54.20 Total Proposed Sq.Feet 5420 Zoning Designation RS 7.2 Plumbing Fixtures Quantity ©escr"ptldn'"y Qiaarltity n �;pescri tion =Quar tq Dishwashers 1 I Gas Pipe Outlets 7 Bathtubs l I Lavatories 4 Water Heaters 1 Showers 2—1 Sinks 7 Mechanical Fixtures 1#?:r . sc�iptlprl G , ;Quantity `m'606651160*In ._rmn 4y t uarlf 'Description Quantity Boilers 1 Fans ir 7 BBQs �� 1 Furnaces 1 ( Ranges 1 Gas Logs _ 3 Hoods ' 1 (— CONDITIONS: 1.No building shall encroach onto any building setback line or easement shown or not shown. 2.Maximum building height is 30'above average building elevation,per Federal Way City Ordinance#90-51. 3.Driveway shall be paved per FWCC,Sec.22-1453.Driveway shall be paved from existing roadway pavement edge,or curb, to garage or carport. 4.Max.driveway width is 30 feet. 5.Building setbacks are: 20 feet front; 5 feet side; 5 feet rear. 6.Prior to any clearing or grading on lot,owner/builder shall install temporary erosion/sedimentation control facilities approved by the City.These facilities must ensure that dirt or sediment laden water does not enter the public drainage system,adjacent lots or public streets.Owner/builder bears responsibility to maintain facilities in proper working order,replacing as necessary.Facilities may be removed only after such time as • . copstrwf;ion► t implete&landscapie installed.See attached for standards.c; si an for location of ji t fencing. 7.Per FWCC,Sec.22-1133(4),eaves,chimneys or awnings,&similar elements of structure that customarily extend beyond exterior walls of structure may extend up to 18"MAX.into required yard setback. Additionally,total horizontal dimensions of elements that extend into required yard,excluding eaves,may not exceed 25% of structure's facade length from which elements extend. 8.This decision shall not waive compliance with future City of Federal Way codes,policies,or standards relating to the subject proposal. 9.All building downspouts,footing drains&drains from all impervious surfaces such as patios&driveways shall be connected to approved storm drain outlet as shown on approved construction drawings.All connections of the drains must be constructed&approved prior to final inspection of building. PERMIT EXPIRES December 2,2002,IF NO WORK IS STARTED. Permit issued on June 5,2002 I hereby certify that the above information is correct and that the construction on the above described property and the occupancy and the use will be in accordance with the laws,rules and regulations of the State of Washington and the City of Federal Way. Owner or agent: / . �;� _ _ Date: 7 - //- O . ! • City deral Way: om mamfniFeDevelopment Services Building - Single Family Permit #:02 - 100762 - 00 SF 33530 1st Way S Federal Way,WA 98003-6210 Ph:253.661.4000 Fax:253.661.4129 Inspection request line: 253.835.3050 Project Name: CHAVEZ � � Project Address: .G aAttet-u d Parcel Number: 327905 0010 Project Description: NSF-Construct new home with attached garage,including plumbing&mechanical. 4 bedrooms. Proposed selling price: $ Owner Applicant Contractor Lender MARTIN CHAVEZ MARTIN CHAVEZ MARTIN CHAVEZ FIRST HORIZON MORTGAGE 33400 28TH PL SW 33400 28TH PL SW FEDERAL WAY WA 98023 FEDERAL WAY WA 98023 33400 28TH PL SW FEDERAL WAY WA 98023 Includes: Census category: 101 -New si #1 I #2 #3 #4 Occupancy Group: R-3 jl U-1 Construction Type: Type V-N [ Type V-N [ecupancy Load: Floor Area(Sq.Ft.): 1st Floor Proposed Sq.Feet 1532 2nd Floor Proposed Sq.Feet 1310 Basement Proposed Sq.Feet 1588 Basic Plan No Census Category 101-New single family housf Construction Type#2 Type V-N Deck Proposed Sq.Feet 320 Garage Proposed Sq.Feet 932 Height of Structure 33.5 Mechanical Yes Occupancy Group#1 R-3 Occupancy Group#2 U-1 Other Proposed Sq.Feet 68 Plumbing Yes Total Building Sq.Feet 5420 Total Proposed Sq.Feet 5420 Zoning Designation RS 7.2 Plumbing Fixtures Description Ake-*_.*= » i ixcriptioi� Quaritit�r , , C7eserlptio Qan#ity Dishwashers 1 Gas Pipe Outlets 7 Bathtubs 3 Lavatories 4 Water Heaters 1 Showers 2 Sinks ! 7 Mechanical Fixtures " GPesrpticl ~ . tuarttN � crl}t►o1 , '.. . :Quantitj .C1e�cr►�tio�� , tom ..... Boilers 1 Fans 7 BBQs 1 Furnaces 1 Ranges 1 Gas Logs 3 Hoods 1 CONDITIONS: 1.No building shall encroach onto any building setback line or easement shown or not shown. 2.Maximum building height is 30'above average building elevation,per Federal Way City Ordinance#90-51. 3.Driveway shall be paved per FWCC,Sec.22-1453.Driveway shall be paved from existing roadway pavement edge,or curb, to garage or carport. 4.Max.driveway width is 30 feet. 5.Building setbacks are:20 feet front; 5 feet side; 5 feet rear. 6.Prior to any clearing or grading on lot,owner/builder shall install temporary erosion/sedimentation control facilities approved by the City.These facilities must ensure that dirt or sediment laden water does not enter the public drainage system,adjacent lots or public streets.Owner/builder bears responsibility to maintain facilities in proper working order,replacing as necessary.Facilities may be removed only after such time as y, constructioti is,cnmplete&landscapi.installed.See attached for standards&siSan for location of;ilt , - fencing. 7.Per FWCC,Sec.22-1133(4),eaves,chimneys or awnings,&similar elements of structure that customarily extend beyond exterior walls of structure may extend up to 18"MAX.into required yard setback. Additionally,total horizontal dimensions of elements that extend into required yard,excluding eaves,may not exceed 25%of structure's facade length from which elements extend. 8.This decision shall not waive compliance with future City of Federal Way codes,policies,or standards relating to the subject proposal. 9.All building downspouts,footing drains&drains from all impervious surfaces such as patios&driveways shall be connected to approved storm drain outlet as shown on approved construction drawings.All connections of the drains must be constructed&approved prior to final inspection of building. PERMIT EXPIRES December 2,2002,IF NO WORK IS STARTED. Permit issued on June 5,2002 I hereby certify that the above information is correct and that the construction on the above described property and the occupancy and the use will be in accordance with the laws,rules and regulations of the State of Washington and 4 the City of Federal Way.L�' Owner or agent: C9_57--_,'" Date: 6 -6- 0 PO N S CARD ON THE I RONT OF BUILD T " ' ' =roc G+'` , ,. 0 B`UI ING DIVISION ' uV FfY INSPECTION RECORD INSPECTION REQUEST PHONE#: 253-835-3050 PERMIT #: 02-100762-00-SF OWNER'S NAME: MARTIN CHAVEZ SITE ADDRESS: 4260 SW 331ST FOOTINGS/SETBACKS / / 7 /0-, -- 1 / ( ) FOUNDATION WALL 77' ✓� Com' /f" ' _ O NOTPOUR CON TEN 7�r 1 BOVEIS APPRrOVED 4��� 4 () DRAINAGE: Line v 1A144.ag. i/b9 ) Connecfion ql// a3 ' r!:406.4.1,. i.t.--.,., DO NO ,POUR SLAB UNT L THEvABOVE ISS PPROVED = „,-,,,,h,... . . .u _, - ( ) 1& 7.j 2.PLUMBING: DWV Z—/ 8 .. p 7� G Water piping Z. / Ej--O 3 L J O ROUGH MECHANICAL 3 7 —O3 e- Gas piping vZ' -- Co . ( ) SHEATHING lRoof i��� v0 Floor .5--...-- __ O _ () SHEAR WALLS 3- 7 -c:343 ....__.t......) ( ) ELECTRICAL ROUGH-IN Ditch Cover ( ) FIRE/DRAFTSTOPS a ALL THE ABOVE MUST BE APPROVED P OR TO FRAMING INSPECTION a FRAMING/FIRESTOPPING — CJ '" C..— °i, " ,i`- THE,ABOVE-MUST BE APPROVED PRIOR TO INSULATING OR SHEETROCKING () INSULATION: Floors 4 1( 93 Walls t- If/D3 07 Attic i'—'11-4).) FIg **7 �..,. '''''-'14''''' .. '4,THE ABOVE MUST BE APPROVED PRIOR TO'APPLI'ING SHEETROCK'. () WALLBOARD NAILING $ S -- c,3 c c._J O SUSPENDED CEILING ,.THE ABOVE MUST BEs APPROVED;PRIOR TO TAPING9R INSTALLING CEILING TILE () ELECTRICAL FINAL ( ) PLANNING FINAL ( ) PUBLIC WORKS FINAL_ ( ) FIRE FINAL THE ABOVE MUST BE APPROVED PRIOR TO BUIL ING DEPARTMENT FINAL ( ) BUILDING FINAL 7/g//0 .3 DO NOT OCCUPY THIS BUILDING UNTIL BUILDING FINAL IS APPROVED H k \,3 . b H • 4. A., i•rors, OZ a ci) z m C�" � � • ---t"-\ 8Z b tlic QTYOF G !ECEIVED CONSTRU•ON PERMIT APPLICATION N).\> L APPLICATION NUMBER: 0 - I ' 0 7 • _ - FEB 2 0 2002 APPLICATION NUMBER: - - APPLICATION NUMBER: - - **ThCo ttfataWAYormation—PleasePTint(in ink)ortype** Please note: Electrical,Fire Prevention Systems and Engineering permits may require a separate application. 19 1 • / • PROPERTY INFORMATION SITE ADDRESS: g?6 0 66) 33 1 S- 1 , ASSESSOR'S TAX/PARCEL #: - LEGAL DESCRIRTION OF SUBJECT PROPERTY,(ATTACH SEPARATE DESCRIPTION IF LENGTHY): [ti-(- OF '44, 'e g W ■ PROTECT INFORMATION TYPE OF PROJECT(This application): RBUILDING ❑ PLUMBING ❑ MECHANICAL ❑ DEMOLITION ❑ ELECTRICAL ❑ ENGINEERING❑ FIRE PPREVENTION SYSTEM PROJECT DESCRIPTION(Provide detailed description): DSU OU e CA./ V (, ( (/ • PROJECT NAME: C�/1-1''' -/ CZ A_.-S.-, e L---� ■ PEOPLE INFORMATION PROPERTY OWNER: NAME: I DAYTIME PHONE: /14 'r% ; / ( ,w'-e--Z ( ZS3) Ff74(-Sri‹,-7 MAILING ADDRESS(STREET ADDRES ;CITY,STATE,ZIP): CONTRACTOR: NAME: DAYTIME PHONE: ( ) _ MAILIADDRESS(STREET ADDRESS;CITY,STATE,ZIP): EVENING PHONE: V: ( ) - CITY OF FEDERAL WAY BUSINESS LICENSE NUMBER: FAX NUMBER: - - ( ) _ CONTRACTOR'S REGISTRATION NUMBER: EXPIRATION DATE: (copy of card required) / / APPLICANT: NAME: DAYTIME PHONE: cSpr , Abp-✓ ( ) - MAILING ADDRESS(STREET ADDRESS;CITY,STATE,ZIP): EVENING PHONE: ( ) _ RELATIONSHIP TO PROJECT: FAX NUMBER: CI ARCHITECT CI TENANT 4Q OTHER(DESCRIBE) 41j0e.e//�Ui W... `"J - / E-MAIL ADDRESS: CONTACT PERSON FOR THIS PROJECT: 'PROPERTY OWNER ❑ APPLICANT ❑ CONTRACTOR • DETAILED BUILDING INFORMATION EXISTING USE: EXISTING BUILDING ASSESSED/APPRAISED VALUATION $ PROPOSED USE: PROPOSED VALUATION FOR IMPROVEMENTS: $ 30O 0&0 SPRINKLERED BUILDING? ❑ YES ❑ NO FIRE SUPPRESSION SYSTEM PROPOSED/REQUIRED: ❑ YES ❑ NO WATER SERVICE PROVIDER: WI LAKEHAVEN Cl HIGHLINE ❑ TACOMA ❑ PRIVATE(WELL) SEWER SERVICE PROVIDER: rA LAKEHAVEN ❑ HIGHLINE ❑ PRIVATE(SEPTIC) • • **NEW RESIDENTIAL CONSTRUCTION ONLY** NUMBER OF BEDROOMS: ESTIMATED SELLING PRICE: $ • • PROJECT FLOOR AREAS FLOOR EXISTING SQ.FT. PROPOSED SQ.FT. TOTAL BASEMENT FIRST ls3a j5-3 -2- SECOND 12 / 0 /3 in THIRD 7 FOURTH KE FLOORS DESCRIBE) �`� AV lCAA g CC� b DECK 2-© 3 zo GARAGE / 9 3 - q3 M HOOWWMANY FLOORS? TOTAL: Z • ■ FIXTURES Indicate number of each type of fixture MECHANICAL AIR HANDLING UNIT(S) EVAPORATIVE COOLER(S) 3 GAS LOG(S) REFRIG.SYSTEM(S) l BBQ(S) 7 FAN(S) / HOOD(S) WOODSTOVE(S) / BOILER(S) FIREPLACE INSERT(S) / RANGE(S) MISC.( _) COMPRESSOR(S) ( FURNACE(S) DUCT(S) '7 GAS PIPE OUTLET(S) HEAT SOURCE: ❑ ELECTRIC 1X4 GAS PLUMBING 3 BATHTUB(S) 7 LAVATORY(S) URINAL(S) / WATER HEATER(S) / DISHWASHER(S) RAIN WATER SYS. VACUUM BREAKER(S) ❑ ELECTRIC V GAS DRINKING FOUNTAIN(S) 7 SHOWER(S) WASH MACHINE OUTLET GAS PIPE OUTLET(S) '7 SINK(S) WATER CLOSET(S) MISC.( ) INTERCEPTOR(S) SUMP(S) ■ DISCLAIMER/SIGNATURE BLOCK I certify under penalty of perjury that the information furnished by me is true and correct to the best of my knowledge,and further,that I am authorized by the owner of the above premises to perform the work for which the permit application is made. I further agree to hold harmless the City of Federal Way as to any claim(including costs,expenses,and attorneys'fees incurred in the investigation and defense of such claim),which may be made by any person,including the undersigned,and filed against the City of Federal Way,but only where s claim arises out of the reliance of the city,including its officers and employees,upon the accuracy of the information supplied a ci as a part of this application. NAME/TITLE: DATE: Z Z Z —O K] PROPERTY 0 NER ❑ APPLICANT ❑ CONTRACTOR FOR OFFICE USE ONLY: El NEW ❑ ADDITION Cl ALTERATION ❑ REPAIR ❑ TENANT IMPROVEMENT CENSUS CODE: LOT SIZE: ZONING DESIGNATION : BUILDING SHELL ONLY? ❑ YES ❑ NO COMP PLAN DESIGNATION BASIC PLAN? ❑ YES ❑ NO SECTION TOWNSHIP RANGE NEW ADDRESS REQUIRED? ❑ YES ❑ NO PLATTED LOT? El YES ❑ NO CHANGE OF USE? ❑ YES ❑ NO COMMUNITY DEVELOPMENT SERVICES•33530 FIRST WAY SOUTH•P.O.BOX 9718•FEDERAL WAY,WA 98063-9718•253-661-4000•FAX:253-661-4129 • Construction Permit Fee Calculation Sheet *******PLEASE NOTE: ALL FEES MUST BE VERIFIED BY CITY STAFF PRIOR TO ACCEPTANCE OF PAYMENT. CHECKS FOR INCORRECT AMOUNTS WILL NOT BE ACCEPTED!******* Building, mechanical,and fire prevention system fees are based on the following schedule. TABLE A TOTAL VALUATION FEE FACTOR (1)$1.00 to$500.00 (1)$24.25 (2)$501.00 to$2,000.00 (2)$24.25 for the first$500.00 plus$3.27 for each additional$100.00 or fraction thereof,to and including$2,000.00 (3)$2,001.00 to$25,000.00 (3)$71.46 for the first$2,000.00 plus$15.00 for each additional$1,000.00 or fraction thereof,to and including $25,000.00 (4)$25,001.00 to$50,000.00 (4)$403.61 for the first$25,000.00 plus$10.82 for each additional$1,000.00 or fraction thereof,to and including $50,000.00. (5)$50,001.00 to$100,000.00 (5)$664.35 for the first$50,000.00 plus 17.50 for each additional$1,000.00 or fraction thereof,to and including $100,000.00. (6)$100,001.00 to$500,000.00 (6)$1,025.55 for the first$100,000.00 plus$6.00 for each additional$1,000.00 or fraction thereof,to and including $500,000.00 (7)$500,001.00 to$1,000,000.00 (7)$3,337.23 for the fist$500,000.00 plus$5.09 for each additional$1,000.00 or fraction thereof,to and including $1,000,000.00. (8)$1,000,001.00 and up (8)$5,788.23 for the first$1,000,000.00 plus$3.91 for each additional 31,00000 or fraction thereof. Bold number is the base fee for the specified increment Italicized,underlined number is the fee per additional specified increment PLUS: Add 65 percent of the base building permit fee for plan review fee. Add 25 percent of the base mechanical permit fee for mechanical plan review fee. Add 15 percent of the base building permit fee for Fire District#39 surcharge,commercial only. Add$4.50 for WA State Building Code Council,plus$2.00 per unit for duplex&above. ** Electrical, plumbing,and mechanical fees are calculated separately** - ■ BUILDING - PROPOSED VALUATION: 1 FEE FACTOR FROM TABLE A: Number: (a)Base Fee: (b)Additional Increment Fee: Estimated Permit Fee: (1) Estimated Plan Review Fee: (2) Estimated FW Fire Department Surcharge: (3) (COMMERCIAL ONLY) ■ MECHANICAL . PROPOSED \‘937) FEE FACTOR FROM TABLE A: Number: (a)Base Fee: (b)Additional Increment Fee: Estimated Permit Fee: (4) Estimated Plan Review Fee: (5) ■ FIRE PREVENTION SYSTEM PROPOSED VALUATION: FEE FACTOR FROM TABLE A: Number: (a)Base Fee: (b)Additional Increment Fee: Estimated Permit Fee: (6) Estimated Plan Review Fee: (7) ■ PLUMBING - • - • Base Fee Number of Fixtures $21.00+{ X$7.00/fixture} = (8)Estimated Permit Fee Estimated Permit Fee X .65 = (9)Estimated Plan Review Fee Miscellaneous Fixture Charge:(10) Sub Total (Page one): Line(s)(1)+(2)+(3)+(4)+(5)+(6)+(7)+(8)+(9)+(10) _ (11) '1 &' 3W 33 /5-f- Fs/ • o2 -/ ao 74,2.- G2, AMI.. GEOTECHNICAL SERVICES, INC. RECEIVED Soil Mechanics, Rock Mechanics, Groundwater Hydrology • January 2,2002 FEB 2 0 2002 MARTIN&DAWN CHAVEZ CITY OF FEDERAL WAY 33400 28th Place SW BUILDING DEPT. Federal Way,WA 98023 Regarding: Geotechnical Evaluation of Lot 1,High Point Park II,located at 24XX 331'Street,Federal Way,Washington Dear Martin&Dawn: We have carried the studies necessary to complete the above-referenced evaluation. The following letter report will acquaint you with our findings, and provide you with recommendations to be implemented during any future development of the site. SITE DESCRIPTION The property under discussion is located on 331'Street just east of the junction of 331"and Hoyt road SW, and actually has a frontage onto both streets(see Site Plan, attached to this report.) Access is from 331' Street,however. The lot slope slopes relatively steeply and uniformly down from 331' Street,and has been partially cleared and landscaped. The property is irregularly shaped,with its longest dimension running in a roughly southeast to northwest direction. The upper part of the lot,adjoining 33 IA Street is clear of trees, the only remaining vegetation being long grass and weeds. The lower half of the lot contains a number of semi-mature evergreen trees and appearances suggest that it consists of the original, undisturbed natural slope. The adjoining lot to the south, adjoining the junction of the two streets is an open grass-covered slope,but contains a detention pond and pump house enclosed by a chain link fence. The adjoining lot to the north contains an occupied house of recent construction, and other lots further up 331"Street contain • houses under construction. The land on the other side of 331®`Street consists of vacant lots,and the areas to the south and west,along and on the other side of Hoyt Road remain as undeveloped woodland. The lot has a total area of approximately 17,800 square feet,or approximately four tenths of an acre. PROJECT DESCRIPTION As we understand matters the proposed development of the lot will consist of the construction of a single- family residence,and some landscaping of the slope to create garden and recreational areas. FIELD INVESTIGATION The writer visited the site on Wednesday, October 31, 2001 and supervised the excavation of two exploratory test pits. At that time also the surface features of the slope were examined, to determine whether signs of erosion or instability were present. FINDINGS The two test pits revealed that the upper, open grassy section of the lot contains a mantle of fill up to 3'/z feet thick The fill is relatively clean,sandy material that has apparently been spread fairly uniformly over the upper part of the lot: appearances suggest that it might consist of material removed from the mad cut during the construction of 331' Street. The underlying native soil is light brown sandy silt containing varying amounts of small gravel(soil logs from the two test pits are attached to this report) An inspection of the slope surface revealed no signs of groundwater seepages or water-loving plants,and no indications of down-slope movement of the soil mass, such as tension cracks or small linear escarpments were in evidence. We found no indications of erosion,past or present. Based upon our observations at the site it is our opinion that it is in a stable,well-drained condition, However,because of the presence of a relatively steep slope the following recommendations shall be implemented,without exception. 6009 Jon Court SE, Telephone:360-413-1745 Olympia, WA 98513 Facsimile:360-413-3917 • • AML Geotechnical Services, Inc. Soil Mechanics, Rock Mechanics, Groundwater Hydrology • -2- CONCLUSIONS&RECOMMENDATIONS General Comments Based upon our understanding of the proposed development of this site, and the results of our field observations,it is our opinion that there is no geotechnical reason why a single-family residence should not be constructed on it. The native soil is a dense, competent material, and we found no indications of potential slope instability such as a perched water table. In our opinion the project should be allowed to proceed, therefore, but this opinion is conditional upon all of the following recommendations being followed. Soils Characteristics The native soil present at the site is quite capable of supporting the proposed structure on conventional shallow foundations(i.e.,continuous and spread footings.) Provided that they are set on undisturbed,firm native soil, foundations may be designed to impart an allowable load not exceeding 2000 lbs/ft to the underlying soil. For structural loads of this magnitude in the native soil present at this site,and provided these design and construction criteria are met, we would expect foundation settlement to be negligible. This will provide a factor of safety sufficiently conservative to compensate for temporary increases in loading due to seismic activity, or sustained high wind. The fill that is present on the upper slope is unsuitable material upon which to place foundations. Not only does the fill itself contain some wood debris,but appearances suggest that it was placed over the original native slope surface without the existing grass and other ground-covering vegetation having first been removed. Thus at the fill/native soil interface there is a band of organic material consisting of topsoil and decaying grass and roots. This band was particularly noticeable in the first test pit,excavated lower down the slope(see site plan,attached.) The site soil may be used as structural fill provided that it is free of large cobbles (>_6 inches), organic topsoil, and vegetative debris. If for any reason retaining structures are required,such as to stabilize the sides of a cut made to accommodate a daylight basement, the following values should be used in their design: • Lateral Earth Pressure(Fluid Equivalent),Active, 35 lbs/ft3 • Lateral Earth Pressure(Fluid Equivalent),at Rest, 55 lbs/ft3 • Coefficient of Sliding Friction,Kf, 0.45 The native soil encountered in both test pits is likely to be relatively permeable so that the on-site disposal of stormwater by controlled infiltration would be a feasible option. Because of the slope a better option would be the discharge of stormwater into an existing facility if one exists, but in any case the detailed discussion or design of a stonnwater disposal system goes beyond the scope of this report. Fill Placement As noted in a previous section,the native soil at the site may be used as structural fill provided that it is free of organic or other debris. All structural fill must be placed in loose lifts not exceeding 12 inches in thickness,and should be compacted to not less than 95%of optimum dry density as per ASTM D-1557. All permanent embankments composed of compacted fill shall be inclined no steeper than 2H: 1V, and shall be protected from erosion. Erosion control methods will be discussed in a later section. Structural fill (i.e.,that placed under buildings,or under driveways and roads)may only be placed on surfaces that have first been prepared. Preparation shall consist of the removal of all vegetation and topsoil,and ripping the exposed surface so that the fill may bond without the potential for a failure surface to develop. Any slope inclined at more than 5%shall be keyed,as shown in the accompanying figure,before fill is placed upon it. • Under no circumstances should structural fill be placed upon surfaces inclined at more than 5%unless it • • AML Geotechnical Services, Inc. Soil Mechanics, Rock Mechanics, Groundwater Hydrology • -3 (the fill) is stabilized by the use of engineered retaining structures. If for any reason structural fill is imported it shall meet or exceed the specifications of Table I,attached to this letter. Buffer and Setback As previously noted the proposed building site has been cleared of trees thus vegetation removal will not be an issue prior to construction. However, some grading in the form of a cut-and-fill operation will be necessary to create a level building pad. It is recommended that a minimum setback of 5 feet be established and maintained between the outer edges of all footings and any area that contains fill (see attached Schematic.)It is further recommended that the undisturbed section of the lower slope containing the existing trees and extending to the west property line should be set aside and maintained as a Natural Buffer Area(see Site Plan.) If constraints of space do not permit the establishment of the recommended construction setback from fill-affected areas, foundations must not be placed on the fill surface because of the possibility of resultant differential settlement. In such a situation the footings shall be placed on native soil underneath the fill and taller stem walls or columns shall be used to support the structure. Erosion Control Runoff from the area up-slope is unlikely to be significant, especially if the work is done during the summer months, because of the proximity to the road, which is bounded on its' west side by a concrete curb and sidewalk. If the work is undertaken during the rainy months, some care may be required to prevent storm water from entering the construction area but in any season runoff from up-slope is unlikely to become a serious problem. Adequate protection may be accomplished by the installation of diversion drains, and/or energy-dissipating devices such as straw bales or sandbag dflkes, should they appear necessary(probably not required at all if the work is done during the dry months of summer.) It is unlikely - • that freshets would develop in the ordinary course of events, even during heavy rain,but careless human activity may generate such flows. If the work is undertaken during the winter months the area down-slope should be protected from silt contamination by the placement of a silt fence,but the low erosion potential of these soils probably obviates the need for silt fence protection during the dry season(a typical silt fence detail is attached to this report.) If a silt fence is deemed necessary,it should be located along the edge of the trees,on the eastern limit of the Natural Buffer Area(see Site Plan.) All permanent cut faces shall be inclined at no more than 2H: 1V,and all such cuts shall be immediately protected from erosion by being seeded with suitable vegetation. The seeded areas should be protected during germination by covering them with properly secured clear plastic sheeting. If constraints of room do not permit cut faces to be laid back at the recommended inclination, cuts of up to 1H: 4V may be protected by the construction of rockeries. However, it must be emphasized that rockeries are not retaining structures,but erosion control devices only. Permanent cuts faces steeper than IH:4V must be stabilized by the utilization of engineered retaining walls(note that any rockery over 4 feet in height will require a separate building permit,and must be constructed in compliance with applicable codes. No rockery should exceed ten feet in height.) A typical rockery cross section is attached to this report. Under no circumstances should the inclination ofthe rockery itself be greater than 1H:6V. Drainage As noted in an earlier section the native soil present is likely to be sufficiently permeable to permit the disposal of storm water runoff by infiltration if no other option is available. Our recommendation would be to discharge stormwater into an existing facility is possible since suitable locations for infiltration trenches may limited because of the slope. Under no circumstances shall stormwater runoff from roofs and/or driveways be allowed to discharge onto any unprotected ground surface,and in particular not onto the face of the slope.At the time of this writing we are not in possession of detailed plans for the proposed building and therefore not in a position to discuss drainage options in detail. All stormwater must be disposed of in a controlled manner and discharged to locations wherein it will not cause erosion or environmental damage. • • • AML Geotechnical Services, Inc. Soil Mechanics, Rock Mechanics, Groundwater Hydrology • -4- Landslide Hazard Provided that the previous sections' recommendations concerning erosion control and drainage are fully implemented,we believe that the landslide hazard at this site will be minimal. At the time of this writing, the natural slope on which the property is situated appears to be in a stable condition. We found no indications of groundwater issuing from the slope face anywhere. Provided that all our other recommendations regarding erosion control and drainage are implemented, we believe that the risk of ground failure at this site due to purely natural causes is minimal. The commonest cause of slope destabilization in situations of this kind is human activity. Thoughtless removal of vegetation and careless drainage, whereby storm water discharges onto an unprotected slope surface, are, among other things, common causes of slope failure in the Puget Sound region. In our opinion the natural conditions at the site under discussion are unlikely to lead to slope failure resulting from purely natural causes. We therefore must again emphasize the importance of our recommendations concerning erosion control and drainage. Seismic Hazard There is no history of landslides in this area, or in the general vicinity,resulting from major earthquakes that took place in 1949 and 1965 and 2001 (magnitudes of 7.3, 6.5, and 6.8 respectively.) As noted in previous sections,at the time of this writing the natural slope appears to be stable. The soil types present are not likely to be prone to liquefaction, a phenomenon that requires a pre-condition of low relative density,a high water table,and(in terms of grain size distribution)rather uniform soil. In the absence of the conditions necessary for liquefaction to occur, and with no obvious indications of the presence of a potential failure plane,we believe the seismic risk at this site to be low. Building Limitations • With the qualifications regarding building setbacks discussed in a previous section,we see no particular need for building limitations with regard to the design of the proposed building,as we understand it. Summary In summary, our conclusion is that the property under discussion is a feasible site for the proposed construction. However, it is vitally important that all of our recommendations concerning erosion control, drainage,and building setback,be carefully implemented. Provided that this is done,then we can find no geotechnical reason why the project, as we understand it, should not be allowed to proceed. It is recommended,however,that all pre-construction excavations be inspected by a soils engineer prior to the pouring of footings,to verify cut stability,bearing capacity,and compliance with buffer establishment and building setback recommendations. END OF REPORT TEXT LIMITATIONS This report has been prepared in accordance with generally accepted engineering principles and practices. We make no warranty,either expressed or implied. The opinions expressed are based upon the results of our investigations,and observable conditions at the site. They should not be applied to other,surrounding properties. If conditions are encountered which appear to differ from those described in this report we should be immediately notified, so that we may review the situation and, if necessary, modify the recommendations of this report. In the event that such notice is not forthcoming we retain the right to disclaim any or all of the recommendations contained herein. This report is for the information of our clients,Martin&Dawn Chavez,only. Its'reproduction and/or transmittal to any third party by any means, except in its'entirety, without the written authorization of AML Geotechnical Services,Inc.is prohibited. We would like to thank you for having given us this opportunity to provide you with geotechnical • • AML Geotechnical Services, Inc. Soil Mechanics, Rock Mechanics, Groundwater Hydrology engineering services. Please contact the writer at 360-413-1745 should you have any questions regarding any of the contents of this report. This study has been carried out in association with ADaPT Engineering Inc.,800 So.Maynard Street,Seattle,whose technical assistance we gratefully acknowledge. Yours very sincerely AML Geotechnical ces,Inc. ADaPT En ' eering Inc Gam--r/C Alastair Lum en,P.Eng., urt W.Groesch,P.E., Geotechnical Engineer/President Principal jtV 1 CI _44 101f5 q .9 may` .,,. "tt_- `NALV-i- "4- • cS tiff "i 3 d v z Q • • • • • • AML Geotechnical Services, Inc. Soil Mechanics, Rock Mechanics, Groundwater Hydrology • EXPLORATORY TEST PIT SOIL LOGS TP- 0—9" Organic soil and grass roots 9"—3' Clean brown sandy silt(FILL) 3'—4' Original ground surface;(topsoil,roots,vegetative debris) 4'—7' Light brown sandy silt to silty sand containing some small gravel,damp,dense 7' Hole bottom(no groundwater encountered.) • TP-2 0—9" Organic soil and grass roots 9"—3'/2' Silty sand containing wood fragments and pieces of masonry(FILL) 3'/2'—9'/2' Gray medium silty sand with some small gravel,damp,dense 9Y2' Hole bottom(no groundwater encountered.) END,EXPLORATORY TEST PIT SOIL LOGS • • I • AML Geotechnical Services, Inc. Soil Mechanics, Rock Mechanics, Groundwater Hydrology • DETAILS OF SILT FENCE CONSTRUCTION Filter Fabric Material SO" wide rolls. Use staples or wire rings to attach fabric to wire 2"by 2'by 14 Ga.Wire Fabric or equiv. n n 1 1 1 av k..o^ �.we .3�.-5„0� 1r T O ! 1 > c I ::-:,i11r lil✓'ltt�:im ��!/iu►rrinl: +u m 1 u / t im I Bury bottom of filter materiel 1 1 1 t I ( in 8"by 12'trench 1 ,, 4110.111.0111141.11.10111D +w� 1 t 1 �Iw���N. N 1 11 it ji i i , 8' Max. j t • i .2"by 4" wood posts,standard or better or 1 1 +"' equal alternate:Steel fence posts • A Filter Fabric Material .,—, Li DL 2'by 2"by 14 Ge.Wire `Fabric or equiv. O.y. NIi, Lir ,, y o Provide 3/4'- t.5" dam; 1.0 washed gravel backfill """'^"''': //. N� cu in trench and on both sides - -- of filter fence fabric on the surface .,".,., g• Min. 2"by 4" wood post • Alt:Steel fence posts I (Not to Scale) • • • • Keyed Slope Surface Prior to Fill Placement Typical, Not to Scale • ro A Original Slope __-.r r" A C) ;4 40 arm-'"`c_..... o 01:4"1"16$44°441114-1114.1*-- A ti Keyways or Terraces Must be Wide Enough to Accommodate e• rt• Placement and Compaction � Equipment r o o`'i � - 9 t $4 8 �teta **6' 1 a 1 II 0 H , _dz.,...) g t 4.1 i .-)Ci p 14 Ili .4/!.t C1' g i \ ., i i ").: 6 42 p s . 6 • 0 0 t 4 , , 1 E .3 .q r \ , , ,. o \ ► • 10 E »I, •1 • • S . AML Geotechnical Services, Inc. Soil Mechanics, Rock Mechanics, Groundwater Hydrology • TABLE 1 Structural Fill Materials used for fill should meet the following specifications unless approved by the geotechnical engineer. U.S. Sieve Percent Passing by Dry Weight Size Select Dram gavel 3 inch 100 - 3/4 inch 50-100 - 3/8 inch - 100 1/4 inch - 30-50 No. 4 26-65 • - No. 8 0-5 No. 10 10-50 - No. 40 0-20 - No. 200 0-5* * Less than 5% passing based on minus 3/4 inch fraction. The above fills are recommended for use in the following situations. Select Granular Pili: All foundation and slab areas. In parking areas requiring fill to reach grade, and as sub-base. Drain Grayel: Use around drainage pipes at footing drains, and in interceptor and underdrains. IP AML Geotechnical Services, Inc. Soil Mechanics, Rock Mechanics, Groundwater Hydrology • ROCKERY CROSS-SECTION.TYPICAL fNot to Soak) No Structures, Including Other Rockeries or Parking Lots 1 �1 in this Zone e .i 1/ - - D OJ o-p•o .4 • -a��!! >16" OA 4� , ./ 6 • •aI r;QS1•'aia.0o. - c./g. Dataso 0 1 ol.a `:�� ' ` Structural �, �t Q ):*• o' '` Fill 6 i a 0 . 0 0 •;�'A. • �� Filter Fabric • V 4% . 0 .• • ' N��ct T. a� . 0,. :D. • ,o ,, ata ° o p i c • ��'�; Clean Native a° °-1:1' -; 7 Ground — ca � +;'fir k `b,• • 4•1••• alma MEW - �/�zeagezzo - of ;C:.)••, Min. 6" Pea Gravel r min. 8" •--11-- 1 1�1 1/2"- 1 I Crushed Firm Native Rock Ground --.. 4" f"--- GENERAL NOTES 1. Rockeries 4' and over in height require a 4. The long dimension of all rocks shall be placed building permit. -perpendicular to the wall. Each rock should bear on two rocks in the tier below. 2. Rockeries 6' and over in height require engineering supervision by special inspector 5. Improved walling surfaces above and adjacent to (UBC 306b), which at minimum shall consist of rockeries over 30'in height shall be protected by inspection and written certification of subgrade, a guardrail conforming to UBC 1711. placement of base course and drainage, and finished rockery. 6. Rockeries are erosion-control structures, not retaining wall. Native material must be stable • 3. Rock shall be sound and have minimum density and fox-standing in cut face. of 160 pounds per cubic foot. • • • AML Ootechnical Services, Inc. Soil Mechanics, Rock Mechanics, Groundwater Hydrology 411 SITE PLAN Scale: t"=20' (Not a Survey,Topography by Others) \ /ill �o re ori N 1 I 0 --E k 3 t/1 • 44d 1 r, . ile fr\ z a 1 q M (korth f • • Approximate Test Pit Location ..-- Approximate Western Limit of Fill