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Home My WebLink About03090 - Technical Information Report CITY OF RE�TpV RECEIVED APR 0 9 20D3 BUILDING DIVISION °;wP - Z�1 - 3 o�v TECHNICAL INFORMATION REPORT Castille Homes Short Ptat Renton, Washington I i February 12, 2003 � I �I ' � CITY OF RENTOh: RECEIVED :r. - ,�'�� ':iJ51 CX�A.`�'t$EliN4f�� Prepared For: Castille Homes, Inc. S, I,• O 14804 lst Avenue N.E. �Cy o�wAs � Duvall, Washington 98019 ��`� '� - � A � ' Prepared By: � GISTER�'� �� Offe En ineers PLLC IanTnL E� �� g � 'i'! 13932 S.E. 159th Place Renton,Washington 98058 EXPIRES 0 30�0 King County Department of Development and Environmental Services TECHNICAL INFORMATION REPORT (TIR) WORKSHEET f Part 1 PROJECT OWNER AND Part 2 PROJECT LOCATION AND � PROJECT ENGINEER DESCRIPTION Project Owner Castille Homes Project Name Castille Homes Short Plat Address 14804 1�Avenue NE Location Duvall. Wa 98019 Township 23N Phone 206-948-0327 Range 5E Project Engineer DaRell Offe .............Section 5 Company Offe Enqineers, PLLC Address/Phone 425-260-3412 13932 SE 159�' Place Renton WA 98058-7832 Part 3 TYPE OF PERMIT Part 4 OTHER REVIEWS AND PERMITS � APPLICATION I ❑ Subdivison ❑ DFW HPA ❑ Shoreline Management � Short Subdivision ❑ COE 404 ❑ Rockery ❑ Grading ❑ DOE Dam Safety ❑ Structural Vaults ❑ Commercial ❑ FEMA Floodplain ❑ Other ❑ Other ❑ COE Wetlands ' Part 5 SITE COMMUNITY AND DRAINAGE BASIN Community Kennydale Neighborhood Drainage Basin Lake Washinqton Part 6 SITE CHARACTERISTICS ❑ River ❑ Floodplain ❑ Wetlands ❑ Stream ❑ SeepslSprings ❑ Critical Stream Reach ❑ High Groundwater Table ❑ Depressions/Swales ❑ Groundwater Recharge ❑ Lake ❑ Other i Steep Slopes ! Part 7 SOILS � Soil Type Slopes Erosion Potentiai Erosive Velcoties InC _5°/a to 15% _Slight to Moderate_ _Slow to Moderate_ ❑ Additionai Sheets Attached ; Part 8 DEVELOPMENT LIMITATIONS i� REFERENCE LIMITATION/SITE CONSTRAINT I I ❑ j ❑ ❑ ❑ �� ,� ❑ Additional Sheets Attached Part 9 ESC REQUIREMENTS MINIMUM ESC REQUIREMENTS MINIMUM ESC REQUIREMENTS DURING CONSTRUCTION AFTER CONSTRUCTION ❑ Sedimentation Facilities � Stabilize Exposed Surface ($� Stabilized Construction Entrance �I Remove and Restore Temporary ESC Facilities � Perimeter Runoff Control � Clean and Remove All Silt and Debris � Clearing and Graing Restrictions � Ensure Operation of Permanent Facilities � Cover Practices ❑ Flag Limits of SAO and open space � Construction Sequence preservation areas ❑ Other � Other � Part 10 SURFACE WATER SYSTEM �� ❑ Grass Lined ❑ Tank ❑ Infiltration Method of Analysis ' Channel ❑ Vault ❑ Depression —1998 KCSWDM_ ❑ Pipe System Compensation/Mitigati ❑ Energy Dissapator ❑ Flow Dispersal on of Eliminated Site ❑ Open Channel Stora e ❑ Wetland ❑ Waiver 9 ❑ Dry Pond ❑ Stream ❑ Regional ❑ Wet Pond Detention Brief Description of System Operation Runoff from the roof and drivewav areas will be conveved throuqh acceptabfe sd pipe to infiltration trenches and drywells. The infiltration facilities are sized usin�the standards set forth in the 1998 KCSWDM. Appendix C, paqes C-90 throuah C-15 Facifity Related Site Limitations Reference Facility Limitation Part 11 STRUCTURAL ANALY5IS Part 12 EASEMENTS/TRACTS ❑ Cast in Place Vault ❑ Drainage Easement ❑ Retaining Wall � Access Easement ❑ Rockery>4' High ❑ Native Growth Protection Easement J Structural on Steep Slope ❑ Tract J Other ❑ Other Part 13 SIGNATURE OF PROFESSIONAL ENGINEER I or a civil engineer under my supervision have visited the site. Actual site conditions as observed were incorporated into this worksheet and the attachments. To the best of my knowtedge the informati ovided here is accur w // �3 Si ned/Date Preliminary Technica] Information Report for Castille Homes TABLE OF CONTENTS SECTION 1 —PROJECT DESCRIPTION.................................................................2 ExistingSite Conditions.................................................................................................2 DevelopedSite Conditions.............................................................................................2 SECTION 2—CONDITIONS AND REQUIREMENTS........................................... 7 King County Surface Water Manual Appendix C—Small Site Requirements.............. 7 FlowControl................................................................................................................... 7 Erosion and Sedimentation Control................................................................................ 7 APPENDIXA...................................................................••-....................................... 8 LIST OF FIGURES Figure 1 —Vicintiy Map 3 Figure 2 —Existing Conditions Map 4 Figure 3 —Developed Conditions Map 5 Figure 4 —Developed Conditions Spreadsheet 6 2/I 2/2003 � � Preliminary Technical Information Report for Castille Homes � �_ � , SECTION 1 — PROJECT DESCRIPTION � � The proposed Castille Homes Short Plat is a subdivision of 0.81 acres into six single- family lots located within Section 5 of Township 23 North and Range 5 East, Willamette Meridian. The site is situated in the City of Renton along Aberdeen Avenue N.E.just south of N.E. 20'h Street(see Figure 1 —Vicinity Map). The site is bounded by Aberdeen Avenue to the east, and residential developments to west, south, and north. Existing Site Conditions The site is currently developed with two single-family residences and three storage buildings. The site is landscaped with trees, grass, and shrubs (see Figure 2—Existing Conditions Map). The site consists of one basin that slopes down from Aberdeen Ave. N.E. to the west at approximately 10%grade. Currently there are two points of access to the site from Aberdeen Ave. N.E. Developed Site Conditions The developed site will contain the two existing houses, four new single-family residences and approximately 190 ft of shared driveway with associated utilities (see Figure 3-Developed Conditions Map and Figure 4—Developed Conditions Spreadsheet). The existing storage buildings will be demolished. Lots 3, 4, 5 & 6 will gain access from Aberdeen Ave. N.E. via the new access drive. The two existing homes will gain access from their respective existing driveways. Runoff from the new access drive will be collected and conveyed to infiltration trenches. Runoff from the new and existing roof areas will be directed to individual infiltration trenches and drywells. 3I l 2'2003 ? CASTILLE HOMES VICINlTY MAP 0 �E NYDAL D Y S PAR Z NE 24TH ST � � ` mD m 0 m � p � "' < o Z NE Zon-i s-r Z a N�2o.�N sj m m < z � m m D 18TH mx m p �� 2 T S '� Zm O PR J CT �� NE 1 T ST IT Z NE 12TH ST K�R � N P� NOT TO SCALE NTS FIGURE 1 - VICINITY MAP _ - __ ---_ � swu•::o��sw ...... __......�..._.,..�__...... .._ �...�__ �......._._ .�..... �. .............._.....�...__�_.. � w c�ava use(r�s suav�r) j ' _..... .... ..,...� ._..._ _.. ..._,...�.....�..._......_. _._ ..._....._.. ........... .._..r.zx.s.mr' i , ....-...... N.L'. �.�(�Ttl S'IRF,E?" raur,a��a�cntv�x•x�n tixwn r/.9•�v amr � �N GCWL. utSY. 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J y i � ,�� % LDT 4 •"""�~. !A1' S LOT 6 1 � � � �'�' i G� ��y�� _';�.,. � � ,; � *;�E��' I2v"VEFtTS � ' �I _.................._... �i1; .BuN,:�.6A. n�o�wrc�� ) l.E.-295.fD' IQ'CONC. G�!p'RLMVN MQV 250 f E+�?91.89'18'41�YC. . CASTILLE HOMES `Y 2'''v� "�"� ^� . ��:::��.�� ' �.B.,•Jsy.sn�ta•CCfrC. 1" = 40' , 5 ( y�.� .�, �� .,. .. FIGURE 2 " L��NG CONDITIONS MAf� sr�'r.sw _ ...._�....... ..... ...............�,,...�__�.��. __._ ..___-__.... .�_� .... _......._. --. ......_.. .._.... _..�..�._..........____ ��..__._.... / r , ._...._ _,__.........._.... A IS23.OG� N.F. .20TH S1'RL+�'7 mu.vo ,�e•coPnrn a,u... �cr,:µy ?�8'COJ+I�f'R l+.W bV BOhC.G15C!�SWPtlY1 ,;i�rX'^FCN��/� � � I �5Q y 0� YARDORAIN �;(L�11C�t*"nt,jO' 4 GX� W/ PILL ROOFORAIN �1. G.�'Id�Ttl�Ny1sX�NnxcArcHeasN ppN��% / ;'i ... ELBOW(TYP.) LEADER � S�'Z I�`• p�'. W/ U LI � t� / I t� �rrP.i .. T� �' ��DEN vOL.i 6 S�p C CONTROC �a / .�K I ORYWELL � � � / �,� ,6L�OW(TYP.� y/ � �• INFILTRA 1 N �"• •�• •� ,� y F^' /&k19�T8Hl� . ._......- ,�,..... .� /.� ,s �y:'�/y' 96 � R' _'fJ�6i W Cf'M. lWE:� �_.--........ .._._ rgP2_..._ -��..� .�^'�� y ..,... .,� ,,.� J`�NA^. UNf� �M M1 . � __�11 r z.ur•��. � � -�-�� ..- �-� ,- --- -aer \ z :? n. uw -'" - �' �. �.c�__..._o......._��--.�. ._...�y...�.._..�_..........�-��--t3--*�' u......,;;sr... �N 3B'4.�' .._..p._....... c'-.-n.._.-u--� _-r�..._.... i y f� , 2Ba �0 3� -" 10 00' �', •`: , ' �' � a�I N �� / µ� � �;`;� - sa�o�� .rinr�n , n��'*':s��s?��"" • C �S� � � I W 29O , � "� � �i �� . �� \�� -'+k�57N.t �y 2 -- � ., �" • �''", ' ' . .r^' PL'.!(��.' J ".;,�,�. CM M7H7' 1 •1�',` '��• �� , _ ..-. .<'GpmFs.�r r CATCW BASIN � �'"' R L �`�� tXLS11NG �+{•.: ,� _a,I. '-; ^ � r�.5r�,.S.„:j W/ ANEDGRAT / .i � `j g�yl� .._..___n'i.t J ob�n ' 6 SPILL CONTRV I o• / I' fi?Dfl'�CENi �r^-��:., �1 ti��,,'.. M�� "' Y � (... ELBOW �[ � I��'' 10173 Sq.R, ./ � L��1v��;t.o ,� l ' �495.��F * cl.�l f� _ �` � � ?I. , , . r- � ; ,x , I� __ _ . 1 , �yy�.59o.r I � �34� „ V , __�� i_� �.I ' :t_ � � f'^�p F _:_�._._... i .' — ' . . 'a I � j'�..,' , t , / �.� � _. l_ �.__}_ - _..... p P'�JISHfU . i , Rh I.� �- �- . .._�. �. .. � ■ � •r ,, r 4�:':.. '�' FLOOR='t92.W . � ' . _p ft'NCC'O.ili�-. � .f. ' �'.�� . .n._ i . ' .. I.., l � � \a W, (J1'I1N£ / ' .� y, ! A f ' ... � � , q ��. iz. _:'N8f138'4 , � � � ,"�c,t.�`::r,_;r__�rt �, _....._ ,,_.__, ,.._ �.y :::.5� ;,,,,. STORMDRAINACaE~ 76.40\�' � 76.30� } �Op,�� ! ^.'�� •:i::::i fNFlL,RATION a NCH "O � / �.�.. — � � . — _ -�^'� .iiiiiiiiiiiiiiii M , • i� .. `= �i;.. TYP. . ��. ,�q � :�i i i iiriiii♦ � $ _ 280 .�,..- � �� . . f '� � .. .., 291 ,� :.. �-�. j� �� .. Cv, .• •.,< lL /r �! ■ L. . � I . � tXISIIN HOUSE xtN17!'Fv� " / /' t; y� -rt- E, rrN -r>� � �, �� a• , � "` � .,tL I �� tlt.�l�r�� '',I ti� r o ..� �, .•� 512 $F r w,� �1 '�,�7 �" _ o� /� � " �_ 6[UGE OECK1ftTut F4.7t. I��.� I �1mc,� _.�' g / .:d` �.ULlLI zr��h� `,. U ~ i._.. ,\ 2I. So.�.l' �' .Se � rf . -r.,ar �., r. � y"� ( ' Y- :�._ , - . � ^� I , . [.0��r�� J �.J � �-- J �. . �Q = ' '�.::u.u.u, ri� �' �,� ; ..,�.�. �_ . . � .�. 17.� ...02 ROL �J�n� ;iF, � � � � . I i'.. }•� TG• � 'j.;. {S�� rp �' I'::� _' i. ...\.__ ,�": ,. .�'� � o� � ` r o� � ' . ° _. '3-��; ' ��--'Y-�r .,��,-,�.t J/ �....... • . ,. . �_�_ - -._._ .. „ , y. , _,� , t, ��/,• -, 1;\i� � .i C'�1.'.a',�.s�.•. � � FINISHED � � _ '_ ��. ,`( � � � "� I FLOOR•?82.00 ,� .'[:'t. � I � h .�. I ROL '� , ✓. 777i"Jl.4"... � . i+ \t�lrlt( h I / ' >1 ��, '��- lUrCr`'J,51',_� ow , � � , .- .� : > ;- ,y :�c W f�'!HVF. \ -r..�� 7^•.-..._._.{g. .........� . /,.. il"} 'i '_� ' ' � I I�!{' �6.00 _ ,..,_.. 29 . '�100.00' \�.,,....,..,,,1^, � /,.�. � NB�e ,47.E �. � "�� ' $ � rrrsca;.r-' er' aeo' SS � ', r' � , q��" !?U��tl.wc `�b,,, Fi7�:.;...,t....� .- fti''p7FWµ'1 ' �, ' . .. 4M.t SQ.Ft I � � '� '� � �. LOT 4 ^''� LOT :i L07' 6 � 4 � c�. - �.�.. ...� I I R�� r�,a� � ;i ; � �c� rrrv�;�rrs � �,�x; ._. �'�,:, f�.- � , ��i.• c�"�".... i`�r.H-a�'��e•caMc. �Anvr�rm aaw raso� a�,,:.zs2.aa'�e•cavc. w CASTILLE HOMES 4� �'L '�� ' � r��,_��- ��, � ,r- ..x„�� ,��;,,. 1" = 40' -� � � ;�:a,.:�� ;;� �. FI G URE 3 = ��'��OPED CONDI TlONS � AP Castilie Homes Short Plat DEVELOPED CONDITIONS SPREADSHEET 1801 / 1809 Aberdeen Avenue NE Renton Existing Impervious Proposed Impervious Location Description (sq. ft.) (sq. ft.) 1801 Aberdeen Ave. NE <LOT 1> house/ garage 1625 1560 driveway/entry 1442 1442 deck 338 290 walks 320 0 outbuildings 504 0 <LOT 3> house/ garage 1185 driveway/entry 340 patio 100 <LOT 5> house/ garage 1185 driveway/entry 210 patio 100 1809 Aberdeen Ave. NE <LOT 2> house/ garage 1504 1504 driveway/entry 715 715 deck 0 0 walks 725 310 outbuildings 320 0 � <LOT 4> house/ garage 1025 driveway/entry 320 �� ' ' patio 100 <LOT 6> house/ garage 1185 driveway/entry 210 patio 100 7493 11881 Private Driveway 5591 17472 Change in Impervious 9979 �S9• �J FIGURE 4 Preliminar��Technical ir,fnrrnari�,n R�n�rC f�r('�i�tui� i:�_�� - s _ ��' _. r � a �, _ _ _ King County Surface Water Manual Appendix C — Small Site Requirements The Castille Homes project meets the threshold requirements for consideration as a "Small Site." The project is a single-family residential project and ultimately adds only 9,979 s.f. of impervious surface(within the 2,000 to 10,000 s.f. limits, see Figure 4— Developed Conditions Spreadsheet). Lastly the project clears less than 2 acres as the site itself is only 0.81 acres. As part of the"Small Site Requirements," flow control and erosion and sedimentation control must be addressed. Flow Contro! A combination of infiltration trenches and drywells are proposed in order to meet the flow control requirements. The loamy sand quality of the Indianola soil (InC) found on site provides adequate infiltration medium. Approval from DDES is not required as the general slope on the property is 10%, which falls under the 2Q% slope threshold. The roof area of the existing and new residences will be conveyed to individual infiltration facilities. Roof runoff on lots l, 2, 3 &4 is tight-lined to infiltration trenches sized using the requirement of 30 ft of trench per 1000 s.f. impervious surface. Roof runoff on lots 5 &6 is sent to drywells. Each drywell can handle up to 1000 s.f. of impervious surface,therefore 2 drywells are placed on each lot. The stormwater runoff from the shared access drive is also infiltrated. The access drive is a pollutant generating surface so the water passes through a catch basin with down-turned elbow prior to flowing into the infiltration trench. The down-turned elbow will prevent most suspended solids from entering the infiltration facility. The shared driveway infiltration trenches are sized in the same manner as the roof runoff trenches (see Appendix A for details of infiltration facilities and sizing calculations). Erosion and Sedimentation Control Erosian and sedimentation control (ESC) is required on small sites. An ESC plan v��ill be _ submitted to the City of Renton for review. Proposed features will include a rock construction entrance, mulching of exposed soil, and silt fencing to prevent sediment from leaving the site. 2/12/2003 7 Preliminary Technical Information Report for Castille Homes APPENDIX A 2r��?oo� s C�.3—INFILTRATION TRENCHES�ID DRYWFLLS I�IGi)R�;C.2.G TYPIGAL DRYWF.Ld.IPtFIL1'RATION SYSTE�VI Roaf danvnsKn� Fiouse Catch B a�s� {l�Drain) —� Roof frow DaMr�spot,it 4a trx:h Diame�6er � �� LL Hole Filledwith I PLA1�11�IE1flf �i{�-�"Washed Drain Radc tY�S � r—R ao�f daur,spout �—Mark C errbzr af Hale H4 u�e c�erth�w t wi� t"Gapped Psd or Oth�r�s Spla�h Bt[rck TopsoEi---� Flushwith Su�face � i - - - '=,`r'=..' =>t;r-�j i �'stlicl. -� fibW F�me Mesh Sc1'eer� � �Min_�"ci a �e p�� a�cn Basin 4 {�ard Dr�in) 481nch Diame4er �'miri. Sides ofHale Hole Fil(edwi�► � Linec!witJ7 t iia-3°lAfashed F Rer Fak,ri c Drain Rods �� tJ!i�. �'abov�e 5�ea�o,ia l DRY 1fitE LL H igh Grous�dwater Tai�le SE�'T{� � � �!T$ � 1 Smal.Site llr3ina�e 12aquireznca�tti y�1'9R C-I S , ';?.3 INFILTIL�:ION TRE;�'CHES[�T�D DRYti��:LLS �T(�RE C�.0 TYPICAL DOW�iSPOUi'Il1iF�LTRATION S1 ST�LI r00� dain 4"ri�d or s"A�sible perf��eti pipe �------��--------------------- --.4 � . � � � � � � � � . 4��------ " '___-----=! irf�trationtr�erwh� ��np wl3atid tid PLA.N VlEtN tM(TS r�f ctain �re�'ft c3,u ! 4"ricjd ar G"fi�c�ke �fasM lalock—. -� �perfara��d pqx I � -------------___., � �tilrVrster �6 Q------ ------ � s�ra��r �o� � � 9 t�4 washedrock A��4ad ------ ----------�o-t3�o�-a�p' r f�e rreshscr�een �—CB sutr�wfso�d 6 RR�FILE VIE� � NTS fiRerfabric r�mpac�d ba�kfiil o- ��ngd ar�'ti�ble g�,�,� �a ' per�tt'a�edppe a.n q�..rt,a 4 b 8 O B O ��A Q Dn� VI�8fS�r�Ck l C�^�� t �1G.7�'t h� _f, .�s�t' SECFIC}N�t NTS Snrall Site Urainae�Ri:yuironk:nU' yi(:y?; C:-I 3