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Home My WebLink About03491 - Technical Information Report BAIMA & HOLMBERG INC. "4- CI)m TECHNICAL INFORMATION REPORT for SE 168th Street Condominiums May 9, 2002 Reutseu $/I2,f Z- RISED I/5/o3 izeL44vt.) 3/s8/03 v15GD ,f?/o3 Re-&m 2/03 u C(J 4l-JZc T 13D r'r - c( 1 Z 3`O 8 xUPE 41 pF WASiiI ",... � , CITY OF RENTON ' �°'y `� E I E REC U ► DEC 12 2008 A 4, 11332 -4b/STV- BUILDING DIVISION NA EXPIRES 11/30/0 LAND USE INSPECTION Baima & Holmberg, Inc. Job No. 584-002 20o$ SEP 24 RECEIVED Prepared For John Mastandrea FINAL CORRECTED T.I.R. 2411 S 248th, Unit D-16 Kent, WA 98032 DATE: 14°./2/2-,ok?::. APPROVED 100 FRONT STREET SOUTH • ISSAQUAH • WASHINGTON • 98027-3817 • (425) 392-0250 • (425)391-3055 3 # 9/ • TABLE OF CONTENTS 1. PROJECT OVERVIEW 2. CONDITIONS AND REQUIREMENTS SUMMARY 3. OFFSITE ANALYSIS 4. FLOW CONTROL AND WATER QUALITY FACILITY ANALYSIS AND DESIGN 5. CONVEYANCE SYSTEM ANALYSIS AND DESIGN 6. SPECIAL REPORTS AND STUDIES 7. OTHER PERMITS 8. ESC ANALYSIS AND DESIGN 9. BOND QUANTITIES, FACILITY SUMMARIES, AND DECLARATION OF COVENANT 10. OPERATIONS AND MAINTENACE MANUAL SECTION 1 PROJECT OVERVIEW Project Overview t5 This project involves the development of a 1.27-acre parcel into a l4 unit condominium complex. The site is located in the Rolling Hills area of unincorporated King County between SE 168th Street and SE 169th Street at about 115th Avenue extended. The site is mostly cleared and covered with blackberry and other brush. The underlying soil is Alderwood Series. There is one onsite drainage basin that collects and drains to the existing SE 169th Street cross culvert draining into the woods south of SE 169th Street and beyond. Because this development will provide stormwater detention and water quality controls,this project will have little if any effect on the downstream storm system. Because the upstream and adjacent drainage basins are small, the capacities of the downstream and onsite drainage system are apparently adequate to handle the usual flooding-sized storm events without problems. Proposed Stormwater Facilities Because there doesn't appear to be any major drainage problems within 1/4 mile of the site, the Level 1 Flow Control called out for this area is adequate. A combination Level 1 detention and Basic Water Quality wetvault is being proposed. \�,'�t 5 ',, y, k L 'rttk --4.4,- y —��J�- '.--, ..".".*:‘%�' �� ~tom I __ 31 J.iy 4 f ji -- I'L - L I I'I:-St `a• '� f• a ..14:43'.%";::111._.1._7) _ ,.,`r`f=`3 ti:•� • 4.Z ff;' —r —,. 5 i \—'.. -7.7E1. 1 .r • i ■ Li E_-'' J IL.~! i- - ' '\ .'1 is,_ ;1• '--' L. (•. I r'I.• I11�'1J— iTr. win . • �F i -k \SE-` ! 1t11 ' I F' 'SI ■l i. III `� 1 L. it Irk 1 /i//i ■ 'e2'..) \\"—Th....„,t..).„<„,• '1 r -'` �..\, —=.� = _.. 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' rail: 'At C �,� ,. .,Ur y 1. ri .. • .2 .• : A,gU �I SLS\tb� AgC 1 Tu \ -II: . .' di •V\ , i 1 :1 0 ; .1_• - - � , • ii e"-a lir S 0 c Lr4,� ...A�'i•� 7 � • Ir-71...N4., �Agc -Pv I I. n •1• ra 11 .. King County Department of Development and.Environmental Services TECHNICAL INFORMATION REPORT (TIR) WORKSHEET Part 1 PROJECT OWNER AND Part 2 PROJECT LOCATION AND PROJECT ENGINEER DESCRIPTION Project Owner Project Name �otM� IAAS"1744.02PEA Address Location 21(1 C✓. ZYt$ TH 11f T �'I(, Township 23 Phone6b K�tir cte0)-1._ s Range Section Z9 Project Engineer 5tPe t1101.4t•zjr P, Company 764£wt 4 tfotAktae44.. Address/Phone Part 3 TYPE OF PERMIT Part 4. OTHER' REVIEWS AND PERMITS. : APPLICATION Subdivison DFW HPA Shoreline Management Short Subdivision COE 404 Rockery Grading DOE Dam Safety Structural Vaults Commercial FEMA Floodplain Other Other CcNDo ( a COE Wetlands Part 5;..SITE COMMUNITY AND DRAINAGE BASIN Community Drainage Basin 60675 cete,,e/G 01.0,` ' vte.„ Part 6 SITE CHARACTERISTICS River Floodplain Wetlands SIPA 01.4, ct-holomn.fraltAimp Stream Seeps/Springs Critical Stream Reach High Groundwater Table Depressions/Swales Groundwater Recharge Lake Other Steep Slopes Part 7 .SOILS Soil Type Slopes Erosion Potential Erosive Velcoties AIj>LWodn - vb.-140Am. Additional Sheets Attached Part 8 DEVELOPMENT LIMITATIONS REFERENCE LIMITATION/SITE CONSTRAINT Ch. 4—Downstream Analysis ( 'PG W NyrOATA4wI St'hW¢D uo %(G.it fit AeruT yitauJ Acti • ft2op(0444.1 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 V 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 r/Flag Limits of SAO and open space V preservation areas Construction Sequence Other Other Part 10 SURFACE WATER SYSTEM Grass Lined Tank Infiltration Method to-f Analysis Channel + l Depression Pipe System Compensation/Mitigati Energy Dissapator Flow Dispersal on of Eliminated Site Open Channel Wetland Waiver Storage Dry Pond • Stream Regional Wet-Rend Detention - Brief Description of System Operation L�`✓' / i6 /Ci �tuki Oct CeimB0412'7ON Facility Related Site Limitations Reference Facility Limitation • Part 11 STRUCTURAL ANALYSIS Part 12_ EASEMENTS/TRACTS +Y Cast in Place Vault (/Drainage Easement Retaining Wall Access Easement Rockery> 4' High Native Growth Protection Easement Structural on Steep Slope Tract Other Other Part 13 SIGNATURE OF PROFESSIONAL ENGINEER I or a civil engineer under my supervision my supervision have visited the site. Actual site conditions as observed were incorporated into this worksheet and the attachments. To the best of my knowledge the information provided here is accurate. igndr/-11,te '4'#n b t S . F .rt 168th ST. 1, S, L Ai I a.� / e xs-14, 4,. _T "d't.. s 70776'327E7 1;:$0 m _ `r`. — '. _ y, ''14 / � 1 _ _ 4s 4 N i(r 1 I 1 —r3 11.00' 1 � r w't ti4 13 .. .I _ tlf r. 4 1 0 1g 1 12IN 1 CTG R `.i Illr 1 -h 11648k _ y u. ' i , � �z1 09N 11 I th . 1 I 1 �,.; i78 + !� I 7 ' i{jr• Ir '0 . i i m S hi , -- it .._ f '"7 I, I up �m , I .,. r . A.. 444.; ' _��..�= ...F I ,�V 1�IF '�" I�� ,,..., ,,,,, „. , ,,.: q � I \ t,. � I i 4 10.26'.. `• ` 11 A �CCESS TRACT I + 1 /� C MON i t 3 Bl�F1:R I 18 860 aq./t. •�I / g i {� II •}: ..,L.t t 2 -� • • 107.221. rt€ \ V >111 1 ; C I N 89 18'32 r" I ` I Q1 Ii 4II =$ MINT \' 1 09020679- 1 \ I \ f-- a ; P ,1 � t -�; , �, 8 r eQ1 5— ' — — vga 1', — N 'err o e88' r s.i 4 SEWER EASEMENT) nth' -. 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S ) '.W. i •J' r o i v`✓i wl I„r N U a I , 2 3[.,1Nux �' r,• JI P7 rc 7xf1 r , h ,..SC fi9u � ra Phy� -t' .;rl rT SE_169T11 [ _� SE 167711 • IJ' gyp•,.- u, o- p%-1 - i`•�; O Sr.`'/- lr .O ..e4 • Si: A _Y: F5 x Q SE�, 1)0111 ST r_ �T\ �a < < 28 s 169n J ^RrxTON J I)s1 �I / r o w _� x..,ra•/_.�• .£1 '` �_L_'o�-=- 170111 i1;.-j--SI d 4' > > ..�4--r-- Fsi :ct PARK, r��-N'^`,p r�•s .l tr'� /�'r `,'•r i 70 7ATI1 I 0 �_-FS-�.f:�'--ST ;�'J{ --R•�r. -'�•r�'�'• -tl tlr-, rh .f- ---.1.:.1:';'75:-.1"."417:: •' ; SECTION 2 CONDITIONS AND REQUIRMENTS SUMMARY SECTION 3 OFFSI"IE ANALYSIS Project Overview 15 This project involves the development of a 1.27-acre parcel into a}.4-unit condominium complex. The site is located in the Rolling Hills area of unincorporated King County between SE 168th Street and SE 169th Street at about 115th Avenue extended. The site is mostly cleared and covered with blackberry and other brush. The underlying soil is Alderwood Series. There is one onsite drainage basin that collects and drains to the existing SE 169th Street cross culvert draining into the woods south of SE 169th Street and beyond. Because this development will provide stormwater detention and water quality controls,this project will have little if any effect on the downstream storm system. Because the upstream and adjacent drainage basins are small,the capacities of the downstream and onsite drainage system are apparently adequate to handle the usual flooding-sized storm events without problems. Upstream Tributary Area Runoff from SE 168th Street(and residential properties north) drains south then east though the site in a swale/wetland along the west and south property lines. This drainage pattern will not be altered. Analysis included in this report shows that the onsite conveyance and inlet into the downstream system is adequate to handle the concentrated release from the stormwater R/D facility without creating capacity problems. Level 1 Downstream Analysis The site has a low ridge in the north-south direction with the ground gently sloping down at about 4%to the east, west and south. The west and south sloping areas drain to the aforementioned swale/wetland which drains to a 12" storm system at the most southerly southeast property corner (A). This pipe flows south about 140' along the east side of an adjacent power substation, discharging into a roadside ditch along the north side of SE 169th Street. The runoff from the east sloping area of the site drains east though wood to another 12" storm system located on the east side of the adjacent power substation(B), also discharging into the roadside ditch along the north side of SE 169th Street. Runoff from both pipes collects and crosses to the south side of SE 169th Street through a 12"culvert, dumping into a wooded channel, about 200' downstream of the site(C). This channel/wetland(D) flows south about 850' where it inlets into a 12"/18" storm system flowing south under the east 116th Avenue SE gutterline (E). This storm system continues south about 1200' where it discharges into Soos Creek(F). Soos Creek flows east through a large diameter culvert under 116th, well beyond 1/4 mile downstream of the site. There are no obvious capacity, erosion or overtopping problems along this drainage. Drainage Complaints There were many drainage complaints in the area southeast of the site. Only one of them appeared to be along the drainage path downstream of the site, 00-0363, close to 1/2 mile downstream of the site, apparently in Soos Creek. It must have been fixed because Soos Creek appears to be flowing fine. A copy of the complaint is included with this report. Copies of two other complaints, 00-0363 and 99-0608 are also included near(E)where the wooded channel inlets the storm system in 116th Avenue SE. It appears that a new 24" storm line was constructed on the east side of 166th Avenue SE fairly recently that has eliminated these two complaints. Proposed Stormwater Facilities Because there doesn't appear to be any major drainage problems within '/4 mile of the site,the Level 1 Flow Control called out for this area is adequate. A combination Level 1 detention and Basic Water Quality wetvault is being proposed. a.. * '= -syr - - -. - • pail IT, . . ,-: opm. ,,,,__... . t. +k`fir. � - ! •r3 _" fC L > .� .y_ ' . T ...-,- --.,,,,:-e.-,,_air,wo fii ,., r.p i4... . ,...:TV,41 4 Y—144' •-' ..7'7.. • „ g T;11 r".. S; '-,,,,_, • _.. ' .iTt-:•1-1,',r717 ....-1 -' - ' '1 ,.. 1 ift*CE ,' ,___/----1'.', --. 5:,.4 7 i; ,W-----.is-‘ .,•-:!- -i ' -.I.14- 1,;---41P: 1' ' . '. t.7-= ':--.7:4 .ti•#-.2! 01/4„ kv `� frc,,,.4.r.,:.....1.1,,,,,.,_,..71-.-,7, y.r�3, .ce- _ 3�' - ` ' -y �'• .� . - bra ., • i .¢I. 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Gu Lu8tz-t OFF-SITE ANALYSIS DRAINAGE SYSTEM TABLE Surface Water Design Manual, Core Requirement #2 Basin: Subbasin Name: Subbasin Number: Symbol Drainage Drainage Component Slope Distance Existing Potential Observations of field inspector Component Type, Description from site Problems Problems resource reviewer, or resident Name, and Size discharge Type;sheet flow,swale, constrictions,under capacity,ponding, see map stream,channel,pipe, drainage basin,vegetation,cover, % 1/4 ml=1,320 ft overtopping,flooding,habitat or organism tributary area,likelihood of problem, pond;Size:diameter, depth,type of sensstive area,volume destruction,scouring;bank sloughing, overflow pathways,potential impacts. surface area sedimentation,Incision,other Q au f i f el `s c-t) ce44. 1�'bt p -15D' NoNe No 1 NLET N�e o s To 1 G.3.-- r..* -rr GL & 4a_ 1(t , 12 prv .41ALLot corvc. E trot 0) - (55 IUBNE IL-)0/JE ` I GIP ii CULVirz.i- nop,c. 5%�,t 15D -foo kioNF Ivo N i . 00 WooDep c �¢t�t TL D Z%fi Zoo(-1050' wNr NO t rz �� l2 t ST r2 -c Gni j�w� 2.Z- I rv(.� r Nff t�D s U 4,� $4, &Toff lD5o - Zz5p' NONE -3 PTccwpm_ 0 (g" ourFMc - SCos CVC Nonvr ,NONaz_ L1Table.doe 11/2/92 AUG. 7.200' 3:24PM KC WLRD NO.205 P.6/9 KING COUNTy-WAIrER.AND LAND RESOURCES DIVISION DRAINAGE INVESTIGATION REPORT giFerrela INVESTIGATION REQUEST Type (', PROBLEM: DJrtL_A#_s p_ RECEIVED BY: /r, x/1!4 LNrileie Date_5 IZ c OK'd by: T1246FII,4 No. O 05 Received from: Mt l�"/�/`r (Day) ($O b) (Eve) ( NAME: ) PHONE z% '9 53 ADDRESS: WI.- l?$`$ City State Zip LOCATION OP PROBLEM, IF DIFFERENT: SeTif iJt FN / r G N ��t c 1/7>rI Pre S6" gp,h'ax I7300 dUi'' Access Permission Granted Call First (Would Like To Be Present) U .5i. i0. Z /r ,$N,d...0 ap o r CRoss ems.vrmy /9vc: S 'vA/D 1/Its 191/1 S o u rG '7'S alms 4A14 PRA Ai.)*A'F el/Riv'/r-c15xe it/u TA Lq A. 460o Ce9as ,.✓A rivE. tve" 'Cye/-/rY �r Gr4/4/.5"geo(.16 ' 4o41.4T ✓L�% AP/ A) R/D #c°/"/4/77Did 104 o n/ //7rM/ v t .SE" To ops 'r�o!eAo44►r rS''`iO .P6sr/7'4 P Mg M1,7—NAIAie Flat name: Lot No: Block No: Other agencies involved!' No field investigation r •uired I .I l,i :1: t rf'a� .f ,.Yr :11/4 ... :1 7 •`( - S T R Parcel No. Kroll __� Th.Bros: New LOX VI Basin SOD Council District 9 Charge No. RESPONSE: Citizen notified on by: phone letter in person DISrOSmON; Turned to 42 on , f 1 Z/OPby R: No further action recommended because: Lead agency has been notified: _ Problem has been corrected. No problem has been identified. Prior investigation addresses problem: SEE FILE# Private problem-NDAP will not consider because: Water originates onsite and/or on neighboring parcel. Location is outside WLRI)Service Area. Other(Specify): , DATE CLOSED: l / (7 /0/ By: 5:1 AUG.. 77.2002 3:24PM KC kLRD NO.a 5 P.7/9 ---..—...—.-..5ef. .4s4 N..r.". 43gs.it,/), zip i,-.- - .)aw,v„Ire-tee-4,m 1 m9/..r/dr'/n r G'//H-.viv r=c,. . ,... t-rs.C-S_ 2;,.eit,•4 4,7G,E /34-ck sr p 72//5* ,-c/ rAffiic/ Resp l crs e'," r... F7,04-1) /=A-OIk ///,p 1)1- (D.a 5• . . 09 /36 1a .. 1 ' wealaL'r�iC"•• er I i! 1 ..... ---. . . 1 x •.• .Px*rn tt c*'A4t . r • 11 I p . I ter' .SEA/ge'f/r PHi4QLvT •I. i k wr 1 CS/CD•. /732 x ofrl coo ti Er A"& Y ,� AvPrs, � �11 x ,r x • a � 1 eJ "c ( I1,vK 'Svc re--4- 4j r iti,94 : /:.--ii' VAcra✓c C4 r&v C4.' 4i 4'7.' Gi ra.tr G:-g c 4rcaq )3RS4.4/5 /7/rcc` ro 44 l M, -e PR 0,s-1 D.oi eyv 046 CHwid-wirL, 4••7- -7e,v.v L7' ',U(e.sA-/ir re .4:e/0 W r do 14r ,fr7, w,rh r/•-4 . H//Ll- LDok '/NIn, fir p A /"/r -4)/e F, 0,4 era/ray /4 R. So auTiad✓ lv 1W0.9/4v474 F fi�o8L cr-.Al AUG. 7.2002 3:24PM KC 14_RD NO.205 P.8/9 KING COUNTY FILE NO. 00-0363 tia — NAME MICHAEL MALNERICH ViagDepartment of Natural Resources ADDRESS WLRD-DSS-DII �� Water and Land Resource Division - - PHONE (2061296-8353 TB PAGE 656-E7 DRAINAGE INVESTIGATION REPORT KOLL PAG Col E_ DATE 5-24-CO FIELD INVESTIGATION MAINTT. DIVISION 4 INITIALS MAM DETAILS OF INVESTIGATION: / SITE VISIT ON 5.12-0D. CONCERNED ABOUT CHANNEL BLOCKAGE DUE TO SEDIMENT BUILD Up INVESTIGATION FOUND THE WETLAND POND AT GAINSSCROUGM COMMONS IS IMPACTED In SEDIMENT BUILD UP WITHIN gar THE DOWNSTREAM DRAINAGE CHANNEL.SEDIMENT WAS FOUND AT THE OUTLET ON 115TH AVE S! AND AT THE OUTLET WHICH FLOWS INTO CASCADE PARK APARTMENTS, THIS HAS ALSO EFFECTED THE R/D SYSTEM ON 117TH AVE SE. NTS CURRENTLY THIS IS RESTRICTING MAINTENANCE FOR THIS FACILITY (010605). DUE TO THE BUILD UP or SEDIMENT WATER 15 CAUSED THE p/D SYSTEMS TO 9ACKup ' PHOTO TAKEN H 1 SHOWING THE INLET INTO GAINSSORDUGH COMMONS POND. V 2 SHOWING OUTLET WEIR AT GAINSEOROUGH COMMONS. A!7 SHOWING OUTLET PIPE FROM GAINS8OROUGH COMMONS. At 4 SHOWING OUTLET ON 115TH AVE SE FROM GAINSBOROUGH COMMONS. , *5 SHOWING CULVERT GOING UNDER 117TH AVE SE. H 6 SHOWING CULVERT OUTLET INTO CASCADE PARK APTS. #7 SHOWING OPEN CHANNEL THROUGH CASCADE PARK APTS. H S SHOWING OPEN CHANNEL THROUGH CASCADE PARK APTS. SKETCH: CASCADE PARK GAINSBOROUGH APTS COMMONS 01 0SEDIMENT BUI„D UP am POND , Al II DRAINAGE CHANNEL —0 , 116 +�-� 'Q O SEDIMENT BUND UP, �t\7J! 0 �6•CMP yy`� II ( 190100E1W S JI 117324 11.1 U o y Q 4I: M 4. 42) Ai,, ... HUG. (.JJJ:251-11 KC WLRD N0.205 P.9/9 -r,.. _..._... TO: Brian Sleight, diak KING Couxnr Gettle n >1w Acting Sr Engineer Ospsrl rnant of Natural Resouraas Land ResourcesiorEo4/11wFDrraaptilleint:aalognaecirrsy r....\,.. ES&R Molar and Land Raseurae waren ervfcas SectionSe ,�� Mail Stop KSC NR 0600 Drainage Services Ilii irf U 4 i 1' CA 1 ' ` '1 1"; -'.1'''-, ' In, :J':1 *-:-. itli, `J i, 11 \,, ''At , ' ;, . t ti a , '. ,. . . . . DATE 6/9/00 Reference Gainsborough Commons Water ponding in R/D facility DL DelIZELwas identified during the maintenance assessment. An evaluation of the tank and control structure did not identify a problem. A check of the downstream conveyance system identified some sediment build-up conditions that are restricting flow. I think DSS was involved with a one time maintenance of the outlet channel between 116th Ave SE and 117th Ave SE, Upstream of the facility the outlet at the cross culvert under 116"`Avenue Southeast is restricted by sediment deposition. This is causing water to pond in the R/D facility at Gainsborough Commons. This may be in the road right of way and could be referred to Roads Maintenance. Downstream of the outlet pipe into Cascade Park Apartments another significant sediment build-up is occurring. This problem is on private property eC-f6t,ic 1.,'..."/;hie ,-7,e lad 0�igl" Of e- - T rtii C` C�G�,-,/,t y�,v, yorr. 'r SIGNED 7 AUG. 7.2002 3 22PM KC WLRD N0.205 .�P.2/9 KING COUNTY WATER AND LAND RESOURCES DIVISION � `�' Q DRAINAGE INVESTIGATION REPORT /� � Page 1: 1NYBSTIGATION REQUEST Type �.. PROBLEM: ___C7A4r RECIIVETI BY: _ D•te: w •K' . •P44 * E NO. QM--SCG e Received from: r� NAME: -Y)76.e.hate) 46,;),-1) PHONE 766,- V3V J92 ADDREss; /7c4/ //77% /Zoet 5 City hyffriv State Zip, 1lJ a58 Location of problem, if different! Reported Problem: CALL FIRST (Would Like To Be Present) AD-E1712e//di CYdi 1 I _L Immo 697,2& / ri / i' I //o 560/JeaSZ ,4ag I. / 0 4 ~� ej�O O ,fd'M UU/ -1 • 8-z 99 Plat name: . Lot No: Block No: Other agencies involved: No field investigation required initials •„' +f',i;1 0,):,141 tf;1�i } . tii ,'t .,ti•olt ;r �w t,.it x:42 J SA) ea 23 6 1/a S T R Parcel No.Z4 Z'0 1-15- . Kroll CP C2-1!V Th.Bros: New 41 8 7 Old 12/94 Basin -fes _ Council District 9 Charge No. RESPONSE: Citizen notified on '4-/7- 9 • by: r' phone letter in person I cam' en./ ze *vow �4�+ •4y'i .Al I ..vfa AwfreP 72) giM fitakA9ep pe5 o.rr ow"- 6 29G-9p 3 DIS.posrrION: , Turned to. on . I I by OR: No further action recommended because: ?< Lead agency has been notified: a—Ce4 e, ,9,D,q .r09G !4/4i) • Problem has been corrected, No problem has been identified. • Prior investigation addresses problem: seam:Ls* Private problem-NDAP will not consider because: Vater originates onsite and/or on neighboring parcel. Location is outside WLRD Service Area. Other(Specify): DATE CLOSED: O' (Zo i 7 By: D{2,1 'c Dr o 1bS AUG. 7.2002 3:23PM KC IALRD NO.205 P.3/9 ailKING Georgy FILE NO 99.0608 Department of Natural Resources NAME MICHAEL LIN Water and Land Resource Division ADDRESS 17307 • 117TH AVE SE • PHONE (206)766.7237 TB PAGE B56-E7 DRAINAGE INVESTIGATION REPORT KROLL PAGE so2W DATE 9.11.99 FIELD INVESTIGATION MAINT. DIVISION 4 INITIALS-MAM DETAILS OF INVESTIGATION; /`\ SITE VISIT ON 9.27-99. FLOODING OF GARAGE AND CRAWL&PACE DURING HEAVY RAINS. lar INVESTIGATION FOUND THE PROPERTY AT 17907.117TH AVE SE SETS IN THE LOW AREA OF THE NEIGHBORHOdD• DRAINAeg PROM PRIVATE ROAD AND NEIGHBORING PROPERTY ARE SLOPED TOWARD THE HOUSE. ACCORDING TO THE NTS PROPERTY OWNER, DURING A RECENT DOWNPOUR WATER FROM NEIGHBORING PROPERTY CAUSED FLOODING. SUGGESTED TO PROPERTY OWNER ABOUT INBTALUN3 DRAIN AT LOW AREA NEAR GARAGE TO CATCH RUNOFF. THROUGH COMPLAINT 82.0657 IT WAS FOUND WATER FROM 11eTH AVE SE HAD BYPASSED CATCH BASINS AND FLOODED THE GARAGE AT 17314-11BTH AV6 SE. THE PROPERTY OWNER DUG A SMALL DITCH TO DIRECT WATER AWAY FROM GARAGE. WATER PLOWED TOWARD HOUSE 17307, THE LOW AREA OF THE NEISk60RHOOD. PHOTOS "AKEN# 1 SHOWING DRIVEWAY AREA SLOPED TOWARD HOUSE 17307. #2 SHOWING LOW AREA NEAR GARAGE. SKETCH: COMPLAINT 99-0667 • HOUSE 17114 FLOODED AREA CO w l .cl' 'lp w IMMII. r' ` x HOUSE Q FLOW O RIECTIO �, � h', Iii l X 17301 x-x-x-x-X-x-x-x-x-%-x `�GJ US Ntsti FLAW DIREOTION X ,� -♦ _ I r xI COMPLAINT 99-0608 1 r FLOODSO AREA x „ �c 'il,� II 'IlE 111'1 d i. 47 x X 5 P.4iAUG i.2002 3: 23uNG 1.KCL;OkD� TER AND LAND RESUURC DIVISNIONe 9- -9 2 DRAINAGE INVESTIGATION REPORT 41/l Nj Page 1: INVESTIGATION REQUEST Type G PROBLEM: 1--4 v v p•Ay G� n R, Pr'z BY: AlicH�AFG it4/41-4/cc IS Date. Gf�1 OK d by: V2-441L No. "U1( `-7 Received from: (Day) (z°( ) (Eve) NAME: i3.02 I'2A/ ("Am/7=ie PHONE Z 2-Ca- 411 coy 23 ADDRESS:./73_1±4 v c _ic City ,�,vj.v State - Zip 9P058 Location of problem, if different: Reported,Problem: CALL FIRST 0 (Would Like To Be Present) Dc4/?/.4/6 /-/divvy Aphl/A/S /Fe4W oF'/= /4-;"1" //41-1/1`AYE 56 $7/4704$ FD S.7-.R �'4tr pg.9/,4i'4).4 i� S y 5 c i /9"/./.., 1 '- 6'43 6,90eg4 C, Plat name: ti)flin,5""'"`" Lot No: (Q Block No: Other agencies involved: No field investigation required �' ��' Vu ;�1 •.t• ,•Yr VIIt• • , SOW V-3 S 1/4 S T R Parcel No"?q S\4'/e--"--°C)(--Q° Kroll( Th.Bros: New 4560 el 7 Old 42.. 444 Basin t Council District 2- Charge No.-__� REsIoNSe: Citizen notified on j-1?-9 9 by: ,e phone letter in person itgrr"ill t5 Coo►•,pera-ek,r 03t7J.V4 Losz- TO 99- 4640 • TOr.,-•1" D/ TWer FoR Ce,npiAlMr iv/Lt. B6 oi-1 .7 tr-p427 M ter' DIS z+9iv5poRT��®.� ji 4 (4 / e 6 29 4 d 8/4113 DISPosTIToN: Turned to on / / byOR: No further action recommended because: Lead agency has'been notified: Problem has been corrected. No problem has been identified>( Prior investi n addressesproblem: SEE FILE# 060 Private problem-NDAP will not consider because: Water originates onsite and/or on neighboring parcel. Location is outside WLRD Service Area, Other(Specify): DATE CLOSED: 9/ 2.-O/ S By: D/24 — C . 'TO 9, - 0608 AUG. 7.2002 3:23PM KC WLRD N0.205 P.5i9 /1111PN KING COUNTY FELE No. 99-0657 Department of Natural Resources NAME BRIAN OWNER Water and Land Resource Division ADDRESS 17314 - 116TH AVE SE PHONEDRAINAGE INVESTIGATION REPORT KROLL DoE s- y TB PAGE ess--�—�_ KROLL PAGE 802W DATE 9•l1-s8 FIELD INVESTIGATION MAINT. Dr'VISION 4 INITIALS - IMAM DETAILS OF INVESTIGATION. / SITE VISIT ON 9-02-Oq, FLOODING OF GARAGE DURING HEAVY RAINS. INVESTIGATION FOUND THE PROPERTY AT 17314 • 116TH AVE SE HAS HAD A RECENT OVERLAY IN FRONT OF THE IIEF PROPERTY. ACCORDING TO THE PROPERTY OWNER DURING A RECENT DOWN POUR DRAINAGE FROM 116TH AVE SE NTS BYPASSED THE CATCH BASIN IN FROM OF THE PROPERTY,THE WATER FLOWED DOWN THE DRIVEWAY INTO THE GARAGE. PROPERTY OWNER DUG SMALL DITCH TO DIRECT PLOWS PAST GARAGE, TALKED TO PROPERTY OWNER AND I MENTIONED THERE WAS ANOTHER COMPLAINT DOWNSTREAM WHICH EXPERIENCED FLOODING, I ALSO MENTIONED THIS + WOULD BE REFERRED TO ROADS DIVISION, IPHOTOS TAKEN W 1 SHOWING 116TH AVE SE IN FRONT OF HOUSE 173,4. SKETCH) COMPLAINT 99.0667 *I HOUSE 17114 LU 1 FLOODED AREA g MOUSE „J .,I iyl'„I II' l x Q FLOW DIRECTto;°, , M 'l� S' I k 17301 ♦ r r' I k�x—x�x_x_x--x_x_x_x_x W 1 tii I FLOW DIRECTION Q I \ r- N x Al COMPLAINT 99-0608 4�, � !!Loop= AREA x I ,1 I,�1441IIr1:. I,w I•Iir I X /11 ^ .`'.7 1 X I x I L. x SECTION 4 FLOW CONTROL AND WATER QUALITY FACILITY ANALYSIS AND DESIGN JOB S(�! -®o z BAIMA & HOLMBERG, INC. SHEET NO. ii OF 100 Front Steet South /J Vf,,ISSAQUAH, WASHINGTON 98027-3817 CALCULATED BY T�•-- DATE 5/ v(425) 392-0250 FAX (425) 391-3055 CHECKED BY DATE SCALE j/p C1tcs Potr4 Tr tie G o o c . i (etc cif. :Catipi n m ti5 A f p.q r it c- ,r0A. r1)o !/5,4 ti, -/ars 6 ,(00.&4,779v qt = 0.033 crs py ace, a -o 5..? c -gr Deu. c pw0( ?6)A,,5 Ar ni/ rAc ( rd,c ar2.45 A; = o •5O f (i1, ThF1) vs,r►, i F c it,i-5 ("(ra . �-10114 rt.#?t ) o.t58cr$ osv 1006✓ o• ra( eir5 PRODUCT 2041(Single Sheets)2054(Padded) JOB 58 II -CO Z- BAIMA & HOLMBERG, INC. SHEET NO. OF 100 Front Steet South / ISSAQUAH, WASHINGTON 98027-3817 CALCULATED BY DATE I!/5/0 3 (425) 392-0250 FAX (425) 391-3055 CHECKED BY DATE SCALE -DE TIE kinoti DF-sIet ifL Lava c. I flaw 'gc c&+t-tpl rv4 i QI 1)rs r ion, t�uh T V*Jc.T- Varitintstiv p TL1 = 4. S p vswk, gc— T5 ( pczca .iT9orJ. tx4/0 VoLv0 5 , C w/ 17 q '(), vow wti 3.oL ;xo•et t Boz - tZ 5.0E 0 .504c. A- ©.c t 0-1/1 ¢*o,z5 € Y Z PRODUCT 204-1(Single Sheets)2051(Padded) JOB c G c z. BAIMA & HOLMBERG, INC. SHEET NO OF 100 Front Steet SouthNC ISSAQUAH, WASHINGTON 98027-3817 CALCULATED BY T6Z- DATE I (425) 392-0250 FAX (425) 391-3055 CHECKED BY DATE SCALE ‘4, 61/40 LT VOL UvKe r 40(11 t v0., \ I `-. Zs . SI Vil—ti FT% g 4,5 in.+ Q� u! w f Q pTH (1 -T y 3' w/Q D P p r t1 (ZAJD art) c'�fis (ILEI I irxi esu VoL Uwar, pitovc pri NU( I VAatfroN suffe.ar ZC- 5 -)6 ' S stre 5270) w pickir Dr_- "-<?__ fea, t, eoir *to), viNk w jOWfr14 -- pito v t. Dial) (6)0005 Rem r •=1'S 2c.5 ) z z for cr-(,c. v©vw e ZS ' L L Mgr?. wino = 1175cp arif z 30% Z4r* : a3-5 65z54, y1 33°70 .-7 1. 1 : ' - 2-&v cj nc f =- 3 D D9 cq PRODUCT 204-1(Single Shells)2054(Podded) JOB 5eij -toe z_ & HOLMBERG, INC. SHEET NO. OF 100 Front Steet South 772.....„ ISSAQUAH, WASHINGTON 98027-3817 CALCULATED BY DATE ! �J (425) 392-0250 FAX (425) 391-3055 CHECKED BY DATE SCALE i i i i I Kip. .. ....oil"- , , . ,. . ...... ... . i i = iDeli, _....._..._....._ a «_.:...._�.. I. -T_ ti.. ISN I� ¢ _2. _ .. .__ _ ............. } _........ 7Z T I I I ! i I i HHI f, i 1 ' E i. j�. � r G i i I I i 1 1 ! [ i E T ! i i i • : i ; i i _.. _..a _.._.._...t 1- ._.....a— • f 1......._....C I.._.._...._._ v 1 «.._.. „ ._...._._.........s........_... I {_ i i ' i i 1 _ t._.._....., --,._..__..a—..__ 3_�1...Ur' _c .. «..__ ST I' — a « .z ,�'4"773-g.5-4-1- I i 1 r i I ...la... .G I E i E i I S _ i i I EI i ` I i i I i ! i i i• i I I f I I i r 1 i 1 • 1 I i I i i I } .:_.._.-a -♦ _...._._.....__•1 i a 4-- r .,...----a.._ 1 F...._..._-•"--...-.......d - ...y_..._._...}_._ _._« r......_-`i_ _.._ _.._._„ ........._._._... { i I I ; E i i ! I l i i E I I a....._..._.:...__._..... i .._..._.._« = 1 ...._ i i --r- -._...--• —'-'F t.._...._...r...._ I i i i , ! I i ; 1 i ! i i ! „..._.._...: ty......_....r--.._.._....._..._......_ _... a i.._.._.... .♦ a_— ..._ ._ i e i I _ _.. t ...._... E I 1 1 1 i 1 a. I t ,• _y i i ... i 1 1 E I i i j . i E {.. i i- 1. • 4 1 r- i- i I. 1 i ..•....._......T._... i i 1 ! i i i f I I i , i i _ ! i E E , i i i i i 1 1 ; 1 1 BAIMA & HOLMBERG INC. September 23, 2008 Mike Meins King County DDES 900 Oakesdale Ave SW Renton, WA 98055-1219 Re: Rolling Hills Townhomes—King County DDES Project No. B02L1601 Stormwater Vault Volume Certification Dear Mike: The purpose of this letter is to certify that the stormwater vault for the Rolling Hills Townhomes has been constructed per plan and are functioning as designed. The vault was asbuilt on September 9, 2008. The asbuilt detention volume of the vault is 5,616 cu-ft, greater than the required 5,270 cu-ft. The asbuilt water quality volume is 4,368 cu-ft, greater than the required 2,827 cu-ft. The control structure is installed and functioning per design intent. Please call me at (425) 392-0250 if you have questions or need additional information. Very truly yours, BAIMA & HOLMBERG, INC. 3---4/21 ,., Shupe Hol Berg, P'7' LS a F\500-999\0584-002\Documents\Letters\Mike Meins-Vault Certification doc (i'� /, ` Ft I : xr . `i _t 6. f 1 :.1.,,' ' .1:.:''F . cr.� :...c:=...3r 100 FRONT STREET SOUTH • ISSAQUAH • WASHINGTON • 98027-3817 • (425) 392-0250 • (425)391-3055 Existing Conditions KCRTS Peaks Flow Frequency Analysis Time Series File:584u.tsf Project Location:Sea-Tac ---Annual Peak Flow Rates--- Flow Frequency Analysis Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) Period 0.064 2 2/09/01 18:00 0.110 1 100.00 0.990 0.024 7 1/05/02 16:00 0.064 2 25.00 0.960 0.059 3 2/28/03 3:00 0.059 3 10.00 0.900 0.006 8 3/24/04 19:00 0.054 4 5.00 0.800 0.033 6 1/05/05 8:00 0.052 5 3.00 0.667 0.054 4 1/18/06 16:00 0.033 6 2.00 0.500 0.052 5 11/24/06 4:00 0.024 7 1.30 0.231 0.110 1 1/09/08 6:00 0.006 8 1.10 0.091 Computed Peaks 0.095 50.00 0.980 Developed Conditions KCRTS Peaks Flow Frequency Analysis Time Series File:584d.tsf Project Location:Sea-Tac ---Annual Peak Flow Rates--- Flow Frequency Analysis Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) Period 0.158 6 2/09/01 2:00 0.323 1 100.00 0.990 0.126 8 1/05/02 16:00 0.192 2 25.00 0.960 0.191 3 2/27/03 7:00 0.191 3 10.00 0.900 0.132 7 8/26/04 2:00 0.167 4 5.00 0.800 0.160 5 10/28/04 16:00 0.160 5 3.00 0.667 0.167 4 1/18/06 16:00 0.158 6 2.00 0.500 0.192 2 10/26/06 0:00 0.132 7 1.30 0.231 0.323 1 1/09/08 6:00 0.126 8 1.10 0.091 Computed Peaks 0.280 50.00 0.980 4 .5' Deep KCRTS Level 1 Detention Vault Retention/Detention Facility Type of Facility: Detention Vault Facility Length: 34.22 ft Facility Width: 34.22 ft Facility Area: 1171. sq. ft Effective Storage Depth: 4.50 ft Stage 0 Elevation: 0.00 ft Storage Volume: 5270. cu. ft Riser Head: 4.50 ft Riser Diameter: 12.00 inches Number of orifices: 2 Full Head Pipe Orifice # Height Diameter Discharge Diameter (ft) (in) (CFS) (in) 1 0.00 0.84 0.041 2 3.00 0.74 0.018 4.0 Top Notch Weir: None Outflow Rating Curve: None Stage Elevation Storage Discharge Percolation (ft) (ft) (cu. ft) (ac-ft) (cfs) (cfs) 0.00 0.00 0. 0.000 0.000 0.00 0.01 0.01 12. 0.000 0.002 0.00 0.02 0.02 23. 0.001 0.003 0.00 0.03 0.03 35. 0.001 0.003 0.00 0.04 0.04 47. 0.001 0.004 0.00 0.05 0.05 59. 0.001 0.004 0.00 0.06 0.06 70. 0.002 0.005 0.00 0.07 0.07 82. 0.002 0.005 0.00 0.17 0.17 199. 0.005 0.008 0.00 0.27 0.27 316. 0.007 0.010 0.00 0.37 0.37 433. 0.010 0.012 0.00 0.47 0.47 550. 0.013 0.013 0.00 0.57 0.57 668. 0.015 0.015 0.00 0.67 0.67 785. 0.018 0.016 0.00 0.77 0.77 902. 0.021 0.017 0.00 0.87 0.87 1019. 0.023 0.018 0.00 0.97 0.97 1136. 0.026 0.019 0.00 1.07 1.07 1253. 0.029 0.020 0.00 1.17 1.17 1370. 0.031 0.021 0.00 1.27 1.27 1487. 0.034 0.022 0.00 1.37 1.37 1604. 0.037 0.023 0.00 1.47 1.47 1721. 0.040 0.023 0.00 1.57 1.57 1839. 0.042 0.024 0.00 1.67 1.67 1956. 0.045 0.025 0.00 1.77 1.77 2073. 0.048 0.026 0.00 1.87 1.87 2190. 0.050 0.026 0.00 1.97 1.97 2307. 0.053 0.027 0.00 2.07 2.07 2424. 0.056 0.028 0.00 2.17 2.17 2541. 0.058 0.028 0.00 2.27 2.27 2658. 0.061 0.029 0.00 2.37 2.37 2775. 0.064 0.030 0.00 2.47 2.47 2892. 0.066 0.030 0.00 2.57 2.57 3010. 0.069 0.031 0.00 2.67 2.67 3127. 0.072 0.032 0.00 2.77 2.77 3244. 0.074 0.032 0.00 2.87 2.87 3361. 0.077 0.033 0.00 2.97 2.97 3478. 0.080 0.033 0.00 3.00 3.00 3513. 0.081 0.033 0.00 3.01 3.01 3525. 0.081 0.034 0.00 3.02 3.02 3536. 0.081 0.035 0.00 3.03 3.03 3548. 0.081 0.035 0.00 3.04 3.04 3560. 0.082 0.036 0.00 3.05 3.05 3572. 0.082 0.037 0.00 3.06 3.06 3583. 0.082 0.037 0.00 3.16 3.16 3700. 0.085 0.040 0.00 3.26 3.26 3818. 0.088 0.042 0.00 3.36 3.36 3935. 0.090 0.044 0.00 3.46 3.46 4052. 0.093 0.046 0.00 3.56 3.56 4169. 0.096 0.048 0.00 3.66 3.66 4286. 0.098 0.049 0.00 3.76 3.76 4403. 0.101 0.050 0.00 3.86 3.86 4520. 0.104 0.052 0.00 3.96 3.96 4637. 0.106 0.053 0.00 4.06 4.06 4754. 0.109 0.054 0.00 4.16 4.16 4871. 0.112 0.055 0.00 4.26 4.26 4989. 0.115 0.056 0.00 4.36 4.36 5106. 0.117 0.058 0.00 4.46 4.46 5223. 0.120 0.059 0.00 4.50 4.50 5270. 0.121 0.059 0.00 4.60 4.60 5387. 0.124 0.368 0.00 4.70 4.70 5504. 0.126 0.932 0.00 4.80 4.80 5621. 0.129 1.660 0.00 4.90 4.90 5738. 0.132 2.460 0.00 5.00 5.00 5855. 0.134 2.740 0.00 5.10 5.10 5972. 0.137 2.990 0.00 5.20 5.20 6089. 0.140 3.230 0.00 5.30 5.30 6206. 0.142 3.450 0.00 5.40 5.40 6323. 0.145 3.660 0.00 5.50 5.50 6441. 0.148 3.850 0.00 5.60 5.60 6558. 0.151 4.040 0.00 5.70 5.70 6675. 0.153 4.210 0.00 5.80 5.80 6792. 0.156 4.380 0.00 5.90 5.90 6909. 0.159 4.550 0.00 6.00 6.00 7026. 0.161 4.700 0.00 6.10 6.10 7143. 0.164 4.860 0.00 6.20 6.20 7260. 0.167 5.010 0.00 6.30 6.30 7377. 0.169 5.150 0.00 6.40 6.40 7494. 0.172 5.290 0.00 6.50 6.50 7612. 0.175 5.430 0.00 Hyd Inflow Outflow Peak Storage Target Calc Stage Elev (Cu-Ft) (Ac-Ft) 1 0.32 ******* 0.27 4.57 4.57 5349. 0.123 2 0.16 ******* 0.13 4.52 4.52 5295. 0.122 3 0.16 0.06 0.06 4.50 4.50 5265. 0.121 10-yr 4 0.17 ******* 0.06 4.20 4.20 4924. 0.113 5 0.19 ******* 0.05 3.89 3.89 4556. 0.105 6 0.10 0.03 0.03 2.83 2.83 3319. 0.076 2-yr 7 0.13 ******* 0.03 1.75 1.75 2052. 0. 047 8 0.13 ******* 0.02 1.34 1.34 1566. 0.036 Route Time Series through Facility Inflow Time Series File:584d.tsf Outflow Time Series File:rdout Inflow/Outflow Analysis Peak Inflow Discharge: 0.323 CFS at 6:00 on Jan 9 in Year 8 Peak Outflow Discharge: 0.270 CFS at 9: 00 on Jan 9 in Year 8 Peak Reservoir Stage: 4.57 Ft Peak Reservoir Elev: 4.57 Ft Peak Reservoir Storage: 5349. Cu-Ft 0.123 Ac-Ft Flow Frequency Analysis Time Series File:rdout.tsf Project Location:Sea-Tac ---Annual Peak Flow Rates--- Flow Frequency Analysis Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) (ft) Period 0.127 2 2/09/01 15:00 0.270 4.57 1 100.00 0.990 0.026 7 12/28/01 17: 00 0. 127 4.52 2 25.00 0.960 0.052 5 2/28/03 7:00 0.059 4.50 3 10.00 0.900 10-yr 0.023 8 8/24/04 0:00 0.055 4.20 4 5.00 0.800 0.033 6 1/05/05 15:00 0.052 3.89 5 3.00 0.667 0.055 4 1/18/06 22:00 0.033 2.83 6 2.00 0.500 2-yr 0.059 3 11/24/06 7:00 0.026 1.75 7 1.30 0.231 0.270 1 1/09/08 9:00 0.023 1.34 8 1.10 0. 091 Computed Peaks 0.222 4.55 50.00 0.980 SECTION 5 CONVEYANCE SYSTEM ANALYSIS AND DESIGN • , JOB cf3f1010 2 BAIMA & HOLMBERG, INC. SHEET NO. OF 100 Front Steet South /� ISSAQUAH, WASHINGTON 98027-3817 CALCULATED BY r(` DATE * (425) 392-0250 FAX (425) 391-3055 CHECKED BY DATE SCALE 6 Vim//4 4"1/ 72124 I h/ 1>P 1Y14M-w1 Pg 5 ry 2562(95P t 101,4* (oo ' (ti vss_s) L. • Ci C A 2 . 33 A c, G N = gC art s Ti b epr Eo cw".n'4 rtm•h ,5tfisit Fc_ -}.4u490 c©&,c. Fca) Lo :. L, = leo 5o = 3 gYo 56 z 3'°10 rt, = D. (5 (4r1447_5) lc. = 5 4,4455/4.4t90.5 pt, r- 2.0" • Fcow 0.6 60 5 % D•5`Yo 2.0' 09.673'4 l X r—4 V Htt" / tc fo-i •v71---9j-lr9 f lav t 60 ©S 6703 O 4 A95 Ric> : .co Cf, ZZs 127-4F-5 = Z5etj1It'j •I' 0. s LQ�ov = t ,55crsvvoe (v PRODUCT 204 1(Single Sheets(2051(Padded) JOB say-00 -z. BAIMA & HOLMBERG, INC. SHEET NO. OF 100 Front Steet South �D�?✓'�/ / ISSAQUAH, WASHINGTON 98027-3817 CALCULATED BY Tn."- DATE L (425) 392-0250 FAX (425) 391-3055 CHECKED BY DATE SCALE l i pN5.c Tr V 1 rcf-/ Cfli4 or l jk 04, N. //til `-.►�� ` ti dr? ♦SJ6 0 -- (1"''18 Id-- WI DE e-`WIDE LotT6 , too .ti, ( ` 55c .5 p(TG 14 LCSIrUC Li Pi#411V �NGt LtJet2 IF (cul � J 4 , , ,,,„,--73.„, wt a 2. I 51 pit slopes U . 570 Seep a f . 5 H4, it T''� Pt-I C Ic. q=5 » I . 5cFs . D. 6_2 Le-1717614 , ilTtLZ PRODUCT 204-1(Single Sheet)205-1(Padded) JOB BAIMA & HOLMBERG, INC. SHEET NO. OF 100 Front Steet South ISSAQUAH, WASHINGTON 98027-3817 CALCULATED BY 11z DATE (425) 392-0250 FAX (425) 391-3055 CHECKED BY DATE SCALE 1 ourF4 Com- . W 5 144 5 al tVref- /Er- olg. zy' �N4r Vt (NCt ) 11/444T Got ity2et iVe#4a agoird it4Jt Row P9 = 6401 Irmo"taut etr f : rcipw sUrzfAcit Etivi 4114,vit-p6,8, -----• Iftibq 2- 4 AtiA. 5' rFig • L te _ , co l' PRODUCT 204-i ISwgk Sheets)2054(Padded) JOB b-ax-eck -)-c--BA IMA & HOLMBERG, INC. SHEET NO. OF 100 FrontSouth 5//*,3 ISSAQUAH, WASHINGTON 98027-3817 CALCULATED BY DATE (425) 392-0250 FAX (425) 391-3055 CHECKED BY DATE SCALE CA)S c u 't7 'n- dor G rs t 5 1 5- k, 4, a AI RT-5. 5; : (50E apra.r.1, c/�rirgirW 0 � Qimo = . 1-77•c 0 I - th �T 1516/4 -"Tits (900 = • Extp c s �Zo�r Tif vtm. 7i* 0,L6trrE i fas CIAJAimia-fity, .--r- OtraTer C S 4049 a cry g OUrP4G 1441) c.T' u wt No vitTo70AU FCQiA) 4-7' kvi"c->64 I.�. cn• 8D G FS ----211412.. C/4- ti-C c. rc t S 4oc2D &6 -Ir(Z ww w% F 7atfil('vowt D = 4.12 ©((* PRODUCT 204-1)Si ge Sheets)205-1 Padded) SBUH Flows Through Onsite Ditch ******************** S.C.S. TYPE-1A DISTRIBUTION ******************** ********* 10-YEAR 24-HOUR STORM **** 2.90" TOTAL PRECIP. ********* DATA PRINT-OUT: AREA(ACRES) PERVIOUS IMPERVIOUS TC(MINUTES) A CN A CN 3.0 2.3 86.0 .7 98.0 27. 6 PEAK-Q(CFS) T-PEAK(HRS) VOL(CU-FT) 1.00 7.83 19727 ******************** S.C.S. TYPE-1A DISTRIBUTION ******************** ********* 25-YEAR 24-HOUR STORM **** 3.40" TOTAL PRECIP. ********* DATA PRINT-OUT: AREA(ACRES) PERVIOUS IMPERVIOUS TC (MINUTES) A CN A CN 3.0 2.3 86.0 .7 98. 0 27. 6 PEAK-Q(CFS) T-PEAK(HRS) VOL(CU-FT) 1.27 7.83 24579 ******************** S.C.S. TYPE-1A DISTRIBUTION ******************** ********* 100-YEAR 24-HOUR STORM **** 3.90" TOTAL PRECIP. ********* DATA PRINT-OUT: AREA(ACRES) PERVIOUS IMPERVIOUS TC(MINUTES) A CN A CN 3.0 2.3 86.0 .7 98.0 27. 6 PEAK-Q(CFS) T-PEAK(HRS) VOL(CU-FT) 1.55 7.83 29478 t ManningSolver - Untitl- ._-I_.___L__I File - Edit Options Channel Type Output Help ti AS S A 1 New Open Save Print Graph Table Section , \II- 0(61- Trapezoidal Channel Input Data Results Depth 1.5 ft Flow 1115.2 cfs Slope 0.005 ft/ft Flow Area 16_00 sf ' Manning's n 0.035 • Velocity 1254 fps Base Width 1 ft Velocity Head 10.100 ft Side Slope Rt.(H:1) 2 Top Width 17.00 ft Side Slope Lt. (H:1) 1 Froude No. 0.484 Critical Depth 11.0711 ft i Critical Slope 10.0234 ft/ft ON9 i re 77/ 1W Onsite 15-min Step KCRTS Peaks Flow Frequency Analysis Time Series File:onsite.tsf Project Location:Sea-Tac ---Annual Peak Flow Rates--- Flow Frequency Analysis Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) Period 0.238 6 8/27/01 18:00 0.797 1 100.00 0.990 0.175 8 1/05/02 15:00 0.540 2 25.00 0.960 0.540 2 12/08/02 17: 15 0.336 3 10.00 0.900 0.192 7 8/23/04 14:30 0.332 4 5.00 0.800 0.332 4 11/17/04 5:00 0.293 5 3.00 0.667 0.293 5 10/27/05 10:45 0.238 6 2.00 0.500 0.336 3 10/25/06 22:45 0.192 7 1.30 0.231 0.797 1 1/09/08 6:30 0.175 8 1.10 0.091 Computed Peaks 0.711 50.00 0.980 Onsite Backwater Analysis (Assuming all of 15-min step KCRTS 100-yr (0 .80-cfs) through all CB' s) PIPE NO. 1: 32 LF - 12"CP @ 2.53% OUTLET: 444.36 INLET: 445.17 INTYP: 5 JUNC NO. 1: OVERFLOW-EL: 450.17 BEND: 90 DEG DIA/WIDTH: 2. 0 Q-RATIO: .00 g,tr.t C tfr Q(CFS) HW(FT) HW ELEV. * N-FAC _DC tN TW DO DE HWO HWI ******************************************************************************* .80 4.74 449.91 * .012 .38 .25 5.50 5.50 4.71 4.74 .52 �-f Q• Zio` -- 644' NJIw,vWb PIPE NO. 2: 102 LF - 12"CP @ 2.28% OUTLET: 446.17 INLET: 448.50 INTYP: 5 JUNC NO. 2: OVERFLOW-EL: 451.99 BEND: 90 DEG DIA/WIDTH: 2. 0 Q-RATIO: . 00 Q(CFS) HW(FT) HW ELEV. * N-FAC DC DN TW DO DE HWO HWI ******************************************************************************* .80 1.49 449.99 _ .012 .38 .26 3.74 3.74 1.46 1.49 .52 PIPE NO. 3: 22 LF - 12"CP @ 2.27% OUTLET: 448.50 INLET: 449. 00 INTYP: 5 Q(CFS) HW(FT) HW ELEV. * N-FAC DC DN TW DO DE HWO HWI ******************************************************************************* .80 1.02 450.02 * .012 .38 .26 1.49 1.49 1.00 1.02 .51 RON 457 6-5 It d� R/D Vault Outfall Backwater Analysis (Assuming no detention and all of 15-min step KCRTS 100-yr (0.80-cfs) through all CB' s) PIPE NO. 1: 60 LF - 12"CP @ .50% OUTLET: 444.50 INLET: 444.80 INTYP: 5 JUNC NO. 1: OVERFLOW-EL: 449.50 BEND: 90 DEG DIA/WIDTH: 2.0 Q-RATIO: .00 Ri .�-i- GTS 0L---6 Q(CFS) HW(FT) HW ELEV. * N-FAC DC DN TW DO DE HWO HWI ******************************************************************************* .80 .58 445.38 * .012 .38 .38 .50 .50 .38 .58 .53 fo go' -rieviveueLp PIPE NO. 2: 89 LF - 12"CP @ .49% OUTLET: 444.80 INLET: 445.24 INTYP: 5 JUNC NO. 2: OVERFLOW-EL: 451.00 BEND: 10 DEG DIA/WIDTH: 4.0 Q-RATIO: .00 S Q(CFS) HW(FT) HW ELEV. * N-FAC IPT5hir TW DO DE HWO HWI ******************************************************************************* .80 .56 445.80 * .012 .38 .38 .58 .58 .38 .56 .51 PIPE NO. 3: 24 LF - 12"CP @ .50% OUTLET: 445.24 INLET: 445.36 INTYP: 5 Q(CFS) HW(FT) HW ELEV. * N-FAC DC DN TW DO DE HWO HWI ******************************************************************************* .80 .58 445.94 * .012 .38 .38 .56 .56 .46 .58 .52 J tlAut.4' g(kut = 451. • Acc 144/0&41414) ›. 4 SECTION 6 SPECIAL REPORTS AND STUDIES SECTION 7 OTHER PERMITS. iJ(11 SECTION 8 ESC ANALYSIS AND DESIGN JOB 5sti-6:)r> BAIMA & HOLMBERG, INC. SHEET NO. OF 100 Front Steet South '']� ISSAQUAH, WASHINGTON 98027-3817 CALCULATED BY 7 1 Z- DATE__/1/4,4;) Z (425) 392-0250 FAX (425) 391-3055 CHECKED BY DATE SCALE SCI S c .� ✓\, di)2 O , 1Scps Fr.C, p 55p 04 Q:fuT 'tall? 5UeFelca: 14t2-IM 7o8OvQ2 3tZ5P t .lj, 3�`( I S'� Oc PRODUCT 2041(Single Sheets)205-1(Padded) SECTION 9 BOND QUANTITIES, FACILITY SUMMARIES, AND DECLARATION OF COVENANT U LUL. I I, NV 1LNVlvly, oLKCt1k_.L 1rtc:n LL:J1�1:� lin:vvnL. STORMWATER FACILITY SUABIARY SHEET • Development k'^l'"'(4 i 44y WW PdelAtitate 5(Z(0 3 • • Location t131A` % (Io# 491 ENGLNEER DEVELOPER Name g �,yv�' It S Name 3 D!(�+ h/1.4grArs SCOA Firm t Itt GM" t' 1Mgr Firm ' Address (pp F44 ar 57 . SO• Address 2 (i 5. • CIATO Ai D-16 Adr W fQr c' 3•2 PhonePhone QQ Developed Site: Acres 0 '�l( R`--- Number of lots 411 AryI:OA v Number of detention facilities on site: Number of infiltration facilities on site: _ponds ponds k vaults vaults tanks tanks Flow control provided in regional facility(give location) No flow control required Exemption number Downstream Drainage Basins I Immediate Major Basin Basin A I Basin B I Basin C I Basin D Number&type of water quality facilities on site: biofiltration s),vale(regular/wet/or sand filter(basic or large?) continuous inflow?) sand filter,linear(basic or large?) combined detentionAVQ pond sand filter vault(basic or large?) (WQ portio drIF or large?) �•� _' 1 combined detention/wetvault stormwater wetland compost filter wetpond(basic or large?) filter strip wetvault flow dispersion farm management plan landscape management plan • oil/water separator(baffle or coalescing.plate?) catch basin inserts:Manufacturer • pre-settling pond pre-settling structure:Manufacturer flow-splitter catchbasin DESIGN INFORMATION • INDIVIDUAL BASIN A IB IC ID Water Quality design flow I Water Quality treated volume or wetpwod Vr 2.52 L I VO • LT 9/1/9 1998 Surface Water Design Manual 1 hl` h LVUN1Y, JUKtALL WA1CK 1..)CJ1LJLN I'IANU'AL DESIGN TOTAL INDIVIDUAL BASIN EIFORMIATION,cont'd • Drainage basin(s) l A B I C I D Onsite area I e3,C\ 1 AC Offsite area Type of Storage Facility If f X11- (— Live Storage Volume �jt O GQ Predeveloped Runoff Rate 2-year 6,0fGf5 10-year 0,D 5jgG� � 100-year /9,1to Gc, Developed runoff rate year 0146 C Fi 10-year � lqt CfS 100-year c1323�G Type of restrictor Size of orifice/restriction No. 1 4. No.2 p . ' No.3 No.4 FLOW CONTROL&WATER QUALITY FACILITY SUMMARY SHEET SKETCH All detention,infiltration and water quality facilities must include a sketch per the following criteria: • 1. Heading for the drawings should be located at the top of the sketch(top right-hand corner). The heading should contain: • North arrow(point up or to left) • D9# • Plat name or short plat number . •Address(nearest) • Date drawn(or updated) •Thomas Brothers page,grid number • 2. Label CBs and MHs with the plan and profile designation. Label the control structure in writing or abbreviate with C.S. Indicate which structures provide spill control. 3. Pipes--indicate: Pipe size Pipe length Flow direction Use s single heavyweight line 4. Tarr--use a double, heavyweight line and indicate size (diameter) 5. Access roads • Outline the limits of the road • Fill the outline with dots if the road is gravel. Label in writing if another surface. 6. Other Standard Symbols: • Bollards: 0 000 attiem • Rip rap 000000 000000 Fences --x---x---x---x---x---x--- • Ditches 7. Label trash racks in writing. 8. Label all streets with the actual street sign designation. If you don't know the actual street name,consult the plat map. 9. Include easements and lot lines or tract limits when possible. 10. Arrange all the labeling or writing to read from left to right or from bottom to top with reference to a properly oriented heading. 11. Indicate driveways or features that may impact access,maintenance or replacement. 9/1/98 199S Surface Water Design Manual Site Improvement Bond Quantity Worksheet King County Department of Development& Environmental Services 900 Oakesdale Avenue Southwest Renton,Washington 98055-1219 Project Name: Rolling Hills Townhomes Date: 5/2/2003 (revised 12/22/03) Location: 11341 SE 168th Street Project No.: B02L1601 Activity No.: Note: All prices include labor, equipment, materials, overhead and Clearing greater than or equal to 5,000 board feet of timber? profit. Prices are from RS Means data adjusted for the Seattle area or from local sources if not included in the RS Means database. yes X no If yes, Forest Practice Permit Number: (RCW 76.09) Page 1of9 Unit prices updated: 02/12/02 Version: 04/22/02 BQWS.xls Report Date: 12/23/2003 Site Improvement Bond Quantity Worksheet Unit #of Reference# Price Unit Quantity Applications Cost EROSION/SEDIMENT CONTROL Backfill &compaction-embankment $ 5.62 CY 200 1 1124 Check dams, 4" minus rock SWDM 5.4.6.3 $ 67.51 Each 11 1 743 Crushed surfacing 1 1/4" minus WSDOT 9-03.9(3) $ 85.45 CY Ditching $ 8.08 CY 80 1 646 Excavation-bulk $ 1.50 CY Fence, silt SWDM 5.4.3.1 $ 1.38 LF 700 1 966 Fence, Temporary(NGPE) $ 1.38 LF — _ Hydroseeding SWDM 5.4.2.4 $ 0.59 SY Jute Mesh SWDM 5.4.2.2 $ 1.45 SY Mulch, by hand, straw, 3" deep SWDM 5.4.2.1 $ 2.01 SY Mulch, by machine, straw, 2" deep SWDM 5.4.2.1 $ 0.53 SY 1500 1 795 Piping, temporary, CPP, 6" $ 10.70 LF Piping,temporary, CPP, 8" $ 16.10 LF Piping, temporary, CPP, 12" $ 20.70 LF Plastic covering, 6mm thick, sandbagged SWDM 5.4.2.3 $ 2.30 SY Rip Rap, machine placed; slopes WSDOT 9-13.1(2) $ 39.08 CY Rock Construction Entrance, 50'x15'x1' SWDM 5.4.4.1 $ 1,464.34 Each 1 1 1464 Rock Construction Entrance, 100'x15'x1' SWDM 5.4.4.1 $ 2,928.68 Each Sediment pond riser assembly SWDM 5.4.5.2 $ 1,949.38 Each Sediment trap, 5' high berm SWDM 5.4.5.1 $ 17.91 LF Sed.trap,5'high,riprapped spillway berm section SWDM 5.4.5.1 $ 68.54 LF 20 1 1371 Seeding, by hand SWDM 5.4.2.4 $ 0.51 SY Sodding, 1"deep, level ground SWDM 5.4.2.5 $ 6.03 SY Sodding, 1"deep, sloped ground SWDM 5.4.2.5 $ 7.45 SY TESC Supervisor $ 74.75 HR 8 1 598 Water truck, dust control SWDM 5.4.7 $ 97.75 HR _ 4 1 391 WRITE-IN-ITEMS **** (see page 9) Each _ ESC SUBTOTAL: $ 8,098.15 30% CONTINGENCY& MOBILIZATION: $ 2,429.45 ESC TOTAL: $ 10,527.60 COLUMN: A Page 2 of 9 Unit prices updated: 02/12/02 Version: 04/22/02 BQWS.xls Report Date: 12/23/2003 Site Improvement Bond Quantity Worksheet Existing Future Public Private Quantity Completed Right-of-Way Road Improvements Improvements (Bond Reduction)' &Drainage Facilities Quant Unit Price Unit Quant. Cost Quant. Cost Quant. Cost Complete Cost Backfill&Compaction-embankment $ 5.62 CY 500 2,810.00 Backfill&Compaction-trench $ 8.53 CY _ Clear/Remove Brush,by hand $ 0.36 SY Clearing/Grubbing/Tree Removal $ 8,876.16 Acre 0.91 8,077.31 Excavation-bulk $ 1.50 CY 1000 1,500.00 Excavation-Trench $ 4.06 CY Fencing,cedar,6'high $ 18.55 LF Fencing,chain link,vinyl coated, 6'high $ 13.44 LF , Fencing,chain link,gate,vinyl coated, 20' $ 1,271.81 Each ,. Fencing,split rail,3'high $ 12.12 LF Fill&compact-common barrow $ 22.57 CY 200 4,514.00 Fill&compact-gravel base $ 25.48 CY Fill&compact-screened topsoil $ 37.85_ CY Gabion, 12"deep,stone filled mesh $ 54.31 SY , Gabion, 18"deep,stone filled mesh $ 74.85 SY Gabion,36"deep,stone filled mesh $ 132.48 SY Grading,fine,by hand $ 2.02 SY Grading,fine,with grader $ 0.95 SY Monuments,3'long $ 135.13 Each Sensitive Areas Sign $ 2.88 Each Sodding,1"deep,sloped ground $ 7.46 SY , Surveying,line&grade $ 788.26 Day Surveying,lot location/lines $ 1,556.64 Acre 0.91 1,416.54 Traffic control crew(2 flaggers) $ 85.18 HR Trail,4"chipped wood $ 7.59 SY Trail,4"crushed cinder $ 8.33 SY Trail,4"top course $ 8.19 SY Wall,retaining,concrete $ 44.16 SF Wall,rockery $ 9.49 SF Page 3 of 9 SUBTOTAL 18,317.85 Unit prices updated: 02/12/02 •KCC 27A authorizes only one bond reduction. Version: 4/22/02 BQWS.xls Report Date: 12/23/2003 Site Improvement Bond Quantity Worksheet Existing Future Public Private Bond Reduction* Right-of-way Road Improvements Improvements &Drainage Facilities Quant. Unit Price Unit Quant. Cost Quant, Cost Quant. Cost Complete Cost AC Grinding,4'wide machine<1000sy $ 23.00 SY AC Grinding,4'wide machine 1000-2000sy $ 5.75 SY AC Grinding,4 wide machine>2000sy $ 1.38 SY AC Removal/Disposal/Repair $ 41.14 SY Barricade,type I $ 30.03 LF Barricade,type Ill(Permanent) $ 45.05 LF . Curb&Gutter,rolled $ 13.27 LF 450 5,971.50 Curb&Gutter,vertical $ 9.69 LF 50 484.50 Curb and Gutter,demolition and disposal $ 13.58 LF _ , Curb,extruded asphalt $ 2.44 LF , Curb,extruded concrete $ 2.56 LF , Sawcut,asphalt,3"depth $ 1.85 LF 90 166.50 Sawcut,concrete,per 1"depth $ 1.69 LF Sealant,asphalt $ 0.99 LF 90 89.10 Shoulder,AC, (see AC road unit price) $ - SY Shoulder,gravel,4"thick $ 7.53 SY Sidewalk,4"thick $ 30.52 SY Sidewalk,4"thick,demolition and disposal $ 27.73 SY 65 1,802.45 Sidewalk,5"thick $ 34.94 SY 10 349.40 70 2,445.80 Sidewalk,5"thick,demolition and disposal $ 34.65 SY Sign,handicap $ 85.28 Each Striping,per stall $ 5.82 Each Striping,thermoplastic,(for crosswalk) $ 2.38 SF Striping,4"reflectorized line $ 0.25 LF Page 4 of 9 SUBTOTAL 2,891.95 8,417.30 Unit prices updated: 02/12/02 *KCC 27A authorizes only one bond reduction. Version: 4/22/02 BQWS.xls Report Date: 12/23/2003 Site Improvement Bond Quantity Worksheet Existing Future Public Private Bond Reduction* Right-of-way Road Improvements Improvements &Drainage Facilities Quant Unit Price Unit Quant. Cost Quant. Cost Quant. Cost Complete Cost ROAD SURFACING For KCRS'93,(additional 2.5"base)add: $ 3.60 SY 62 223.20 575 2,070.00 AC Overlay, 1.5"AC $ 7.39 SY AC Overlay,2"AC $ 8.75 SY AC Road,2",4"rock, First 2500 SY $ 17.24 SY 62 1,068.88 575 9,913.00 AC Road,2",4"rock,Qty.over 2500SY $ 13.36 SY AC Road,3",4"rock,First 2500 SY $ 19.69 SY AC Road,3",4"rock,Qty.over 2500 SY $ 15.81 SY AC Road,5",First 2500 SY $ 14.57 SY _ AC Road,5",Qty.Over 2500 SY $ 13.94 SY AC Road,6",First 2500 SY $ 16.76, SY AC Road,6",Qty.Over 2500 SY $ 16.12 SY Asphalt Treated Base,4"thick $ 9.21 SY _ Gravel Road,4"rock,First 2500 SY $ 11.41 SY , Gravel Road,4"rock,Qty.over 2500 SY $ 7.53 SY PCC Road,5",no base,over 2500 SY $ 21.51 SY PCC Road, 6",no base,over 2500 SY $ 21.87 SY Thickened Edge $ 6.89 LF Page 5 of 9 SUBTOTAL 1,292.08 11,983.00 Unit prices updated: 02/12/02 *KCC 27A authorizes only one bond reduction. Version: 4/22/02 BOWS.xis Report Date: 12/23/2003 Site Improvement Bond Quantity Worksheet Existing Future Public Private Bond Reduction` Right-of-way Road Improvements Improvements &Drainage Facilities Quant Unit Price Unit Quant. Cost Quant Cost Quant. Cost Complete Cost urr ;c:PVC is:. Access Road, R/D $ 16.74 SY Bollards-fixed $ 240.74 Each Bollards-removable $ 452.34 Each *(CBs include frame and lid) CB Type I $ 1,257.64 Each 6 7,545.84 CB Type IL $ 1,433.59 Each CB Type II,48"diameter $ 2,033.57 Each 1 2,033.57 for additional depth over 4' $ 436.52 FT 2 873.04 CB Type II,54"diameter $ 2,192.54 Each for additional depth over 4' $ 486.53 FT CB Type II,60"diameter $ 2,351.52 Each for additional depth over 4' $ 536.54 FT CB Type II,72"diameter $ 3,212.64 Each for additional depth over 4' $ 692.21 FT Through-curb Inlet Framework(Add) $ 366.09 Each Cleanout,PVC,4" $ 130.55_ Each Cleanout,PVC,6" $ 174.90, Each Cleanout,PVC,8" $ 224.19 Each Culvert, PVC,4" $ 8.64 LF Culvert,PVC,6" $ 12.60 LF 750 9,450.00 Culvert, PVC, 8" $ 13.33 LF Culvert,PVC,12" $ 21.77 LF Culvert,CMP,8" $ 17.25 LF Culvert,CMP, 12" $ 26.45 LF Culvert,CMP,15" $ 32.73 LF Culvert,CMP, 18" $ 37.74 LF Culvert,CMP,24" $ 53.33 LF Culvert,CMP,30" $ 71.45 LF Culvert,CMP,36" $ 112.11_ LF Culvert,CMP,48" $ 140.83 LF Culvert,CMP,60" $ 235.45 LF Culvert,CMP,72" $ 302.58 LF Page 6 of 9 SUBTOTAL 19,902.45 Unit prices updated: 02/12/02 `KCC 27A authorizes only one bond reduction. Version. 4/22/02 BOWS xis Report Date: 12/23/2003 Site Improvement Bond Quantity Worksheet Existing Future Public Private Bond Reduction" Right-of-way Road Improvements Improvements DRAINAGE CONTINUED &Drainage Facilities Quant. Unit Price Unit Quant. Cost Quant. Cost Quant. Cost Complete Cost Culvert, Concrete,8" $ 21.02 LF Culvert, Concrete, 12" $ 30.05 LF Culvert, Concrete, 15" $ 37.34 LF Culvert, Concrete, 18" $ 44.51 LF Culvert,Concrete,24" $ 61.07 LF Culvert,Concrete,30" $ 104.18 LF Culvert,Concrete,36" $ 137.63 LF Culvert,Concrete,42" $ 158.42 LF Culvert,Concrete,48" $ 175.94 LF Culvert,CPP,6" $ 10.70 LF Culvert, CPP,8" $ 16.10 LF Culvert,CPP, 12" $ 20.70 LF 351 7265.7 Culvert,CPP,15" $ 23.00 LF Culvert,CPP,18" $ 27.60 LF Culvert,CPP,24" $ 36.80 LF Culvert,CPP,30" $ 48.30 LF Culvert, CPP,36" $ 55.20 LF Ditching $ 8.08 CY Flow Dispersal Trench (1,436 base+) $ 25.99 LF French Drain (3'depth) $ 22.60 LF Geotextile,laid in trench,polypropylene $ 2.40 SY Infiltration pond testing $ 74.75 HR Mid-tank Access Riser,48"dia, 6'deep $ 1,605.40 Each Pond Overflow Spillway $ 14.01 SY Restrictor/Oil Separator, 12" $ 1,045.19 Each 1 1045 19 Restrictor/Oil Separator, 15" $ 1,095.56 Each Restrictor/Oil Separator, 18" $ 1,146.16_ Each Riprap,placed $ 39.08 CY Tank End Reducer(36"diameter) $ 1,000.50 Each Trash Rack, 12" $ 211.97 Each Trash Rack, 15" $ 237.27 Each Trash Rack, 18" $ 268.89 Each Trash Rack,21" $ 306.84 Each Page 7 of 9 SUBTOTAL 8310.89 Unit prices updated: 02/12/02 *KCC 27A authorizes only one bond reduction. Version: 4/22/02 BOWS.xis Report Date: 12/23/2003 Site Improvement Bond Quantity Worksheet Existing Future Public Private Bond Reduction" Right-of-way Road Improvements Improvements &Drainage Facilities Quant. Unit Price _ Unit Quant. Price Quant. Cost Quant. _ Cost Complete Cost PARKING LOT Si1RFACING 2"AC,2"top course rock&4"borrow $ 15.84 SY 2"AC, 1.5" top course& 2.5"base course $ 17.24 SY 4"select borrow $ 4.55_ SY 1.5"top course rock&2.5"base course $ 11.41 SY WRITE-IN-CTEMS R/D Vault $ 4.00 CF 9792 39,168.00 EA. LF EA. EA. EA. LF SF LF LF SUBTOTAL 39,168.00 SUBTOTAL(SUM ALL PAGES): 4,184.03 106,099.49 30%CONTINGENCY&MOBILIZATION: 1,255.21 31,829.85 GRANDTOTAL: 5,439.24 137,929.33 COLUMN: B C D E Page 8 of 9 Unit prices updated: 02/12/02 'KCC 27A authorizes only one bond reduction. Version: 4/22/02 BQWS.xIs Report Date: 12/23/2003 Site Improvement Bond Quantity Worksheet Original bond computations prepared by: Name: Shupe Holmberg Date: PE Registration Number: 11332 Tel.#: 425-392-0250 Firm Name: Baima & Holmberg Address: 100 Front St South, Issaquah, WA 98027 Project No: B02L1601 ROAD IMPROVEMENTS&DRAINAGE FACILITIES FINANCIAL GUARANTEE REQUIREMENTS PERFORMANCE BOND* PUBLIC ROAD&DRAINAGE AMOUNT BOND*AMOUNT MAINTENANCE/DEFECT BOND" REQUIRED AT RECORDING OR Stabilization/Erosion Sediment Control (ESC) (A) $ 10,527.6 TEMPORARY OCCUPANCY*** Existing Right-of-Way Improvements (B) $ 5,439.2 Future Public Road Improvements& Drainage Facilities (C) $ - Private Improvements (D) $ 137,929.3 Calculated Quantity Completed (E) $ - Total Right-of Way and/or Site Restoration Bond*/** (A+B) $ 15,966.8 (First$7,500 of bond*shall be cash.) Performance Bond*Amount (A+B+C+D) = TOTAL (T) $ 153,896.2 T x 0.30 $ 46,168.9 OR Minimum bond*amount is$1000. Reduced Performance Bond*Total *** (T-E) $ 153,896.2 Use larger of Tx30%or(T-E) (B+C)x Maintenance/Defect Bond*Total 0.25= $ 1,359.8 NAME OF PERSON PREPARING BOND*REDUCTION: Date: *NOTE: The word"bond"as used in this document means any financial guarantee acceptable to King County. **NOTE: KCC 27A authorizes right of way and site restoration bonds to be combined when both are required. The restoration requirement shall include the total cost for all TESC as a minimum, not a maximum. In addition, corrective work, both on-and off-site needs to be included. Quantities shall reflect worse case scenarios not just minimum requirements. For example, if a salmonid stream may be damaged,some estimated costs for restoration needs to be reflected in this amount. The 30%contingency and mobilization costs are computed in this quantity. ***NOTE: Per KCC 27A, total bond amounts remaining after reduction shall not be less than 30%of the original amount(T)or as revised by major design changes. SURETY BOND RIDER NOTE: If a bond rider is used, minimum additional performance bond shall be $ 137,929.3 (C+D)-E REQUIRED BOND*AMOUNTS ARE SUBJECT TO REVIEW AND MODIFICATION BY DDES Page 9 of 9 Unit prices updated: 02/12/02 Version: 4/22/02 BQWS.xls Report Date: 12/23/2003 SECTION 10 OPERATIONS AND MAINTENANCE MANUAL KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL KING COUNTY, WASHINGTON SURFACE WATER DESIGN MANUAL APPENDIX A MAINTENANCE REQUIREMENTS FOR PRIVATELY MAINTAINED DRAINAGE FA CILIT I ES Section No. Subject 1 Detention Ponds 2 Infiltration 3 Closed Detention Systems 4 Control Structure/Flow Restrictor 5 Catch Basins 6 Debris Barriers 7 Energy Dissipaters 8 Fencing 9 Gates 10 Conveyance Systems 11 Grounds 12 Access Roads/Easements 13 Water Quality Facilities A) Biofiltration Swale B) Filterstrips C) Wetponds D) Wetvaults E) Sand Filters F) Leaf Compost Filters G) Infiltration Ponds 14 Oil Control Facilities A) Oil/Water Separators B) Catch Basin Inserts • 9/1/98 APPENDIX A MAINTENANCE STANDARDS FOR PRIVATELY MAINTAINED DRAINAGE FACILITIES NO. 3- CLOSED DETENTION SYSTEMS(PIPES/TANKS) Maintenance Defect Conditions When Maintenance is Needed Results Expected When Component Maintenance is Performed Storage Area Plugged Air Vents One-half of the cross section of a vent is blocked at Vents free of debris and any point with debris and sediment sediment Debris and Accumulated sediment depth exceeds 10%of the All sediment and debris Sediment diameter of the storage area for 1/2 length of storage removed from storage area. vault or any point depth exceeds 15%of diameter. Example:72-inch storage tank would require cleaning when sediment reaches depth of 7 inches for more than 1/2 length of tank. Joints Between Any crack allowing material to be transported into All joint between tank/pipe Tank/Pipe Section facility sections are sealed Tank Pipe Bent Any part of tank/pipe is bent out of shape more than Tank/pipe repaired or replaced Out of Shape 10%of it's design shape to design. Manhole Cover Not in Place Cover is missing or only partially in place.Any open Manhole is closed. manhole requires maintenance. Locking Mechanism cannot be opened by one maintenance Mechanism opens with proper Mechanism Not person with proper tools.Bolts into frame have less tools. Working than Y2 inch of thread(may not apply to self-locking lids.) Cover Difficult to One maintenance person cannot remove lid after Cover can be removed and Remove applying 801bs of lift. Intent is to keep cover from reinstalled by one maintenance sealing off access to maintenance. person. Ladder Rungs King County Safety Office and/or maintenance person Ladder meets design standards Unsafe judges that ladder is unsafe due to missing rungs, allows maintenance person safe misalignment,rust,or cracks. access. Catch Basins See"Catch Basins"Standards No.5 See"Catch Basins"Standards No.5 • 1998 Surface Water Design Manual 9/1/98 A-3 APPENDIX A MAINTENANCE STANDARDS FOR PRIVATELY MAINTAINED DRAINAGE FACILITIES NO. 5- CATCH BASINS Maintenance Defect Conditions When Maintenance is Needed Results Expected When Component Maintenance is performed General Trash&Debris Trash or debris of more than 1/2 cubic foot which is No Trash or debris located (Includes Sediment) located immediately in front of the catch basin immediately in front of catch opening or is blocking capacity of the basin by basin opening. more than 10% Trash or debris(in the basin)that exceeds 1/3 the No trash or debris in the catch depth from the bottom of basin to invert the lowest basin. pipe into or out of the basin. Trash or debris in any inlet or outlet pipe blocking Inlet and outlet pipes free of more than 1/3 of its height. trash or debris. Dead animals or vegetation that could generate No dead animals or vegetation odors that could cause complaints or dangerous present within the catch basin. gases(e.g.,methane). Deposits of garbage exceeding 1 cubic foot in No condition present which volume would attract or support the breeding of insects or rodents. Structure Damage to Corner of frame extends more than 3/4 inch past Frame is even with curb. Frame and/or Top Slab curb face into the street(If applicable). Top slab has holes larger than 2 square inches or Top slab is free of holes and cracks wider than 1/4 inch(intent is to make .re cracks. all material is running into basin). Frame not sitting flush on top slab,i.e.,separation Frame is sitting flush on top of more than 3/4 inch of the frame from the top slab. slab. Cracks in Basin Walls/ Cracks wider than 1/2 inch and longer than 3 feet, Basin replaced or repaired to Bottom any evidence of soil particles entering catch basin design standards. through cracks,or maintenance person judges that structure is unsound. Cracks wider than 1/2 inch and longer than 1 foot No cracks more than 1/4 inch at the joint of any inlet/outlet pipe or any evidence wide at the joint of inlet/outlet of soil particles entering catch basin through pipe. cracks. Sediment/ Basin has settled more than 1 inch or has rotated Basin replaced or repaired to Misalignment more than 2 inches out of alignment. design standards. 1998 Surface Water Design Manual 9/1/58 A-5 APPENDIX A MAINTENANCE STANDARDS FOR PRIVATELY MAINTAINED DRAINAGE FACILITIES NO. 7- ENERGY DISSIPATERS • Maintenance Defect Conditions When Maintenance is Needed Results Expected When Components Maintenance is Performed. External: • Rock Pad Missing or Moved Only one layer of rock exists above native soil in Replace rocks to design Rock area five square feet or larger,or any exposure of standards. native soil. Dispersion Trench Pipe Plugged with Accumulated sediment that exceeds 20%of the Pipe cleaned/flushed so that it Sediment design depth. matches design. Not Discharging Visual evidence of water discharging at Trench must be redesigned or Water Properly concentrated points along trench(normal condition rebuilt to standards. is a"sheet flow"of water along trench).Intent is to prevent erosion damage. Perforations Over 1/2 of perforations in pipe are plugged with Clean or replace perforated pipe. Plugged. debris and sediment. Water Flows Out Maintenance person observes water flowing out Facility must be rebuilt or Top of"Distributor" during any storm less than the design storm or its redesigned to standards. Catch Basin. causing or appears likely to cause damage. Receiving Area Water in receiving area is causing or has potential No danger of landslides. • Over-Saturated of causing landslide problems. Internal: Manhole/Chamber Worn or Damaged Structure dissipating flow deteriorates to 1/2 or Replace structure to design Post.Baffles,Side original size or any concentrated worn spot standards. of Chamber exceeding one square foot which would make structure unsound. Other Defects See"Catch Basins"Standard No.5 See"Catch Basins"Standard No. 5 1998 Surface Water DesignManual 9/1/9S A-7 APPENDIX A MAINTENANCE STANDARDS FOR PRIVATELY MAINTAINED DRAINAGE FACILITIES NO. 10-CONVEYANCE SYSTEMS (PIPES & DITCHES) Maintenance Defect Conditions When Maintenance is Needed Results Expected When Component Maintenance is Performed Pipes Sediment&Debris Accumulated sediment that exceeds 20%of the Pipe cleaned of all sediment diameter of the pipe. and debris. Vegetation Vegetation that reduces free movement of water All vegetation removed so water through pipes. flows freely through pipes. Damaged Protective coating is damaged; rust is causing Pipe repaired or replaced. more than 50%deterioration to any part of pipe. Any dent that decreases the cross section area of Pipe repaired or replaced. pipe by more than 20%. Open Ditches Trash&Debris Trash and debris exceeds 1 cubic foot per 1,000 Trash and debris cleared from square feet of ditch and slopes. ditches. Sediment Accumulated sediment that exceeds 20%of the Ditch cleaned/flushed of all design depth. sediment and debris so that it matches design. Vegetation Vegetation that reduces free movement of water Water flows freely through through ditches. ditches. Erosion Damage to See"Ponds"Standard No. 1 See"Ponds"Standard No.1 Slopes Rock Lining Out of Maintenance person can see native soil beneath Replace rocks to design Place or Missing(If the rock lining. standards. Applicable). Catch Basins See"Catch Basins:Standard No.5 See"Catch Basins"Standard No.5 Debris Barriers See"Debris Barriers"Standard No.6 See"Debris Barriers"Standard (e.g.,Trash Rack) No.6 NO. 11 -GROUNDS(LANDSCAPING) Maintenance Defect Conditions When Maintenance is Needed Results Expected When Component Maintenance is Performed General Weeds Weeds growing in more than 20%of the landscaped Weeds present in less than 5% (Nonpoisonous) area(trees and shrubs only). of the landscaped area. Safety Hazard Any presence of poison ivy or other poisonous No poisonous vegetation vegetation. present in landscaped area. Trash or Litter Paper,cans,bottles,totaling more than 1 cubic foot Area clear of litter. • within a landscaped area(trees and shrubs only)of 1,000 square feet. Trees and Shrubs Damaged -Limbs or parts of trees or shrubs that are split or Trees and shrubs with less than broken which affect more than 25%of the total 5%of total foliage with split or foliage of the tree or shrub. broken limbs. Trees or shrubs that have been blown down or Tree or shrub in place free of knocked over. injury. Trees or shrubs which are not adequately supported Tree or shrub in place and or are leaning over,causing exposure of the roots. adequately supported;remove any dead or diseased trees. 1998 Surface Water Design Manual 911/9S A-9 APPENDIX A MAINTENANCE STANDARDS FOR PRIVATELY MAINTAINED DRAINAGE FACILITIES NO. 13-WATER QUALITY FACILITIES (CONTINUED) D.) WetvauIts Maintenance Defect Condition When Maintenance is Needed Results Expected When Component Maintenance is Performed Wetvault Trash/Debris Trash and debris accumulated in vault,pipe or Trash and debris removed from Accumulation inlet/outlet,(includes floatables and non- vault. floatables). Sediment Accumulation Sediment accumulation in vault bottom that Removal of sediment from vault. in Vault exceeds the depth of the sediment zone plus 6- inches. Damaged Pipes Inlet/outlet piping damaged or broken and in Pipe repaired and/or replaced. need of repair. Access Cover Cover cannot be opened or removed,especially Pipe repaired or replaced to Damaged'Not Working by one person. proper working specifications. Vault Structure Vault:Cracks wider than 1/2-inch and any No cracks wider than 1/4-inch at Damaged evidence of soil particles entering the structure the joint of the inlet/outlet pipe. through the cracks,or maintenance/inspection Vault is determined to be personnel determines that the vault is not structurally sound. structurally sound. Baffles Baffles corroding,cracking,warping and/or Repair or replace baffles to showing signs of failure as determined by specifications. maintenance/inspection staff. Access Ladder Damage Ladder is corroded or deteriorated,not functioning Ladder replaced or repaired to properly,missing rungs,has cracks and/or specifications,and is safe to . misaligned. use as determined by inspection personnel. • 1998 Surface Water DesignManual 9/1/98 A-13 Lily Jane Evans,ADM-ES-0500 �G,�,cy Q& &`... King County Asset Development & Management Section 500 4'h Avenue, Room 500A CONFORMED COPY Seattle, WA 98104 1Q_Doo3-0 20040210000803 KING COUNTY AS AMND 0.00 PAGE001 OF 006 02/10/2004 10:36 KING COUNTY, WA Document title(s) (or transactions contained herein): /CLL/A/G, c.GS Amended Declaration of Covenant _ 5i �\ .4°6301 I taco►$8Z Reference Number(s) of Document assigned or released: BO2L1601 Additional reference numbers on page oL of document(s) Grantor(s) (last name, first name, initials): Mastandrea. John Additional names on page of document(s) Grantee(s) (last name, first name, initials): King County Additional names on page of document(s) Legal Description (abbreviated): ?or. Lei / gLA L9 gL0013, 7.e_cr dea W1De- 130. ctg(o .-l9010; ba:Ns ra ?oc+io0 4 Lot:_39,1?8 Block: ;2. Plat/Section: Green Tracts#1 Township: Range: Additional legal is on page 6 of document(s) Assessor's Property Tax Parcel/Account Number(s): 2 892 60-003 8 Page 1 of 6 After Recording return to: „[,i19 jape Evnns ADM-ES-0500 p9 Count,Zest Estate Services 500 4';eve,Zoo 500c4 Seattle,/40c4 98104 THIS DOCUMENT IS RECORDED TO AMEND AND SUPERCEDE THAT DECLARATION OF COVENANT RECORDED UNDER RECORDING NO. 20030716001882 DECLARATION OF COVENANT IN CONSIDERATION of the approved King County DDES Development permit for application No. B02L1601 relating to real property described as follows: (See attached legal description. page 5 of 6) The undersigned as Grantor(s), declares that the above described property is hereby subject to an easement for a natural or constructed conveyance system and hereby dedicates, covenants and agrees as follows: 1. King County shall have the right to ingress and egress over those portions not contained in Exhibit "A" to access such easement area for inspection of and to reasonably monitor the performance, operational flows, or defects in accordance with and [as presented in King County Code Section 9.04.120]. 2. If King County determines that maintenance or repair work is required to be done to the system, the Manager of the Water and Land Resources Division of the King County Department of Natural Resources shall give notice of the specific maintenance and/or repair work required pursuant to K.C.0 9.04.030. The Manager shall also set a reasonable time in Page 2 of 6 which such work is to be completed by the Grantor(s), its heirs or assigns. If the above required maintenance or repair is not completed with the time set by the Manager, the County may perform the required maintenance or repair. Written notice will be sent to the Grantor(s)stating the County's intention to perform such maintenance. Maintenance work will not commence until at least seven (7) days after such notice is mailed. If, within the sole discretion of the Water and Land Resources Division Manager, there exists an imminent or present danger, said seven (7) day notice period will be waived and maintenance and/or repair work will begin immediately. 3. If at any time King County reasonably determines that any existing retention/detention system creates any of the conditions listed in K.C.C. 9.04.030 and herein incorporated by reference,the Water and Land Resources Division Manager may take measures specified therein. 4. The Grantor(s) shall assume all responsibility for the cost of any maintenance and for repairs to the system. Such responsibility shall include reimbursement to the County within thirty (30) days of the receipt of the invoice for any such work performed. Overdue payments will require payment of interest at the current legal rate as liquidated damages. If legal action ensues,the prevailing party is entitled to costs or fees 5. The Grantor(s) is (are) hereby required to obtain written approval from the Water and Land Resources Division Manager of the King County Department of Natural Resources prior to filling,piping,cutting, or removing vegetation (except in routine landscape maintenance) in open vegetated drainage facilities (such as swales, channels, ditches, ponds, etc.), or performing any alterations or modifications to the drainage facilities contained within said drainage easement. Any notice or consent required to be given or otherwise provided for by the provisions of this Agreement shall be effective upon personal delivery, or three (3) days after mailing by Certified Mail,return receipt requested. 6. This agreement constitutes the entire agreement between the parties, and supercedes all prior discussions. negotiations, and all agreements whatsoever whether oral or written. Page 3 of 6 This covenant is intended to protect the value and desirability of the real property described above, and shall insure to the benefit of all the citizens of King County, and shall be binding on all heirs, successors and assigns. OR OWNER STATE OF WASHINGTON ) COUNTY OF KING )ss. On this day personally appeared before me: -rem" In\as-6.4A rerk , to me known to be the individual(s) described in and who executed the within and foregoing instrument and acknowledged that they signed the same as their free and voluntary act and deed, for the uses and purposes therein stated. Given under my hand and official seal this 2s-Pt day of�E,,,,,,k,.y , 200_. BONNIE BABCOCK NOTARY PUBLIC in and for the NOTARY PUBLIC State of Washington,residing at STATE OF WASHINGTON �� COMMISSION EXPIRES i SEPTEMBER 22,2005 My Commission Expires: 9- 2.2,-.0.5 Page 4 of 6 EXHIBIT 'A' AMENDED DECLARATION OF COVENANT FOR EASEMENT OF A CONVEYANCE SYSTEM LEGAL DESCRIPTION THAT PORTION OF LOT'A', KING COUNTY BOUNDARY LINE ADJUSTMENT • NUMBER L98L0073,RECORDED UNDER KING COUNTY RECORDING NUMBER 9810219010, SAID BOUNDARY LINE ADJUSTMENT BEING A PORTION OF THE FOLLOWING DESCRIBED PROPERTY: ALL OF LOTS 3 AND 4; EXCEPT THE EAST 40 FEET OF THE NORTH 200 FEET THEREOF; LOT 7;EXCEPT TEE EAST 75 FEET THEREOF; AND LOT 8; EXCEPT THE WEST 185 FEET THEREOF,ALL IN BLOCK 2, GREEN TRACTS NUMBER ONE,ACCORDING TO THE PLAT THEREOF RECORDED IN VOLUME 48 OF PLATS, PAGE 1, IN KING COUNTY, WASHINGTON; SAID EASEMENT OF CONVEYANCE SYSTEM DESCRIBED AS FOLLOWS: COMMENCING AT THE NORTHEAST CORNER OF SAID LOT `A'; THENCE SOUTH 89°16'32"WEST ALONG THE NORTH LINE OF LOT 'A' 167.22 FEET; THENCE SOUTH 0°43'28"EAST 101.00 FEET TO THE TRUE POINT OF BEGINNING OF HEREIN DESCRIBED EASEMENT FOR CONVEYANCE SYSTEM; THENCE CONTINUING SOUTH 0°43'28" EAST 60.00 FEET; THENCE NORTH 89°16'32"EAST 38.00 FEET; THENCE NORTH 0°43'28" WEST 60.00 FEET; THENCE SOUTH 89°16'32"WEST 38.00 FEET TO THE TRUE POINT OF BEGINNING AND TERMINUS OF HEREIN DESCRIBED EASEMENT FOR CONVEYANCE SYSTEM. Page 5 of 6 584-002 • N 8916'32" E 219.80' 52.58' T _ 167.22' \-- NORTHWEST CORNER z NORTHEAST CORNER OF SAID LOT 'A' OF SAID LOT 'A' o Io IJ N �-THE TRUE POINT OF ill BEGINNING N 89'16'32" E "."(S* 38.00' � 0 `�<S.1:3.1' 5 z I z o o w �` � o c'1 G� O N Y� O �G God _ 0 5 10 20 SCALE 1" = 20' 0Aremiiiiiiiii .week avt•wk . 1. 38.00' 5. UwP 05 N 89'16'32" E EXHIBIT 'B' ~ A.ii l7'._ % aima & Holmberg inc . 1' i J 114 Cif $ i . .. '` kENGINEERS & SURVEYORS 11332 >.` • 100 FRONT STREET SOUTH ISSAQUAH, WASHINGTON 98027 (425) 392 - 0250 • °NAL i 1• % EASEMENT FOR A CONVEYANCE SYSTEM �J EXPIRES 11/30/04 `