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ToP 50I c_s LiN7- - �� - ►- v . - �� . -; `r MQ7 '_I dL.S Ili l�T SE 2EMCNED �10� C B 15 T Y �E ]I 54 t \ \ \ TO E-MIT OF ANy STQCc--TLAzAL- FICL OiF-, 7—OP: 40& -N Tjz-JILDING )NDATLot,1. INV A,14M . INV NEE E L VAS !S SHD�nIN ON THE Ull_ DING LAP ME f s A,K� FI: �}�ED ��OUN�. wlwl;� �� p l� , Q. I � INV'401.43CE.12 IN �-- Z4' INV .It5CN.)0 I NV:CW Z4"1 l NV: 31-fl (E. -Z4", z 0 LLJ _J LL �n v J 0 z E 0 Z a-t6 z W < < LLJ L W 0'— Q o -I W M w Q n > z Qo Q LJLJ �� O J J W ::D 0� co X 0 Q 0 z 0 0 LL Ld o0 4 ,� W W Q' � N D m c , / /i �J < 0 J > W cc U Q (V Zn B.A.L.D. GOP ERIOIAL Z Y Wc\J SITE EVILOPI ENT W ENGINEERING REVIEW o o v lw a FIELD CHANGE APPROVAL THIS APPROVAL IS ONLY FOR DRAWING NO: CHANGES SPECIFIED IN FIELD CHANGE NO. C 8¢ - 5�Z% DATED b'.d 6. /� gfg% SIGNED____ L DATE 2 0 Cs-' vE�TIC�L_ ULTUM C1�cG4I WE.� Dls-c� :r R-437001 rl-_ 410 I W CPe*4- 15=1'YPE-Z 5� INV:Dt)(N) INV' .4Z(s) -.. 3=1 10 ---TYPE- 11 4�-4" (SSE- P�✓_1�W ) IEIIL-11F CEMENT COW- VEP-TIC L, cUV'?) 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LID MASKED " DRAIN OFFSET U D -1� �dT 15T�1GT02 / �JTION DEV ICE is V ISe7LE AT EDC (DIF-7 OWN I NG AND D12ECTl-y o\\/EP- LADI)E-E -TOP E(-V : 401.00 ZOO- GAPl�,-- lTy C HAI N . _ SL4G � WHEN C�-TE I S ix)WNA , OVE'ZF(..OW ELEV:40Z OZ PIPE SUPR02T C(EAN-OLiT" :�ZTE : E ; OF U r r G ATE , NO C /CG Z - Lc--:, CAEC C-ULVET--T I NC- 4° Z �12�I N • 6 d q 4 o1L_/ WO-T�1Z. SE•PL1�L�T0� ONE 1ZES-TIZIGTED olZ1F tCE NUT -rO SCt�L E Vfl - zmw� ^- r- L-"IV V It--104 FV T TO 7== ,L _ Pam rs dLU�N IZED O'P- ALUM I N I. 7ED -N PE -a GaLVa�NIZEr� s- F-EL PIS is �D, CE�-A to F>WN VE N �-E ,NSPHN--T- T�ELTMENT z NOT To ec-,LL� EET FPAME (2�j L1L.DDE!F- lAT •. (_ELAN -OUT GA- F- IS V IS\e4 E �,OM TOP LI M 3 DAWN SPlS I e GLFA� 0G' R �aTE T�I%NA E, I E�) C-LEQR OF GC S ,E 1rANDA'F-'D C->OL-\/. `3fL . o OF- ALL) M L LADDER STEPS u 5' 4' CEMENT CDNC. WN.V- 2'/ 0 I fir f 1 _1 I FI I F Zl - Co3'-1 Z" X44„ �L= O.,5 �ISt_8t CMP Z' - 3Cp"CMP 11 � I N LET7tL- -3 - -TOP 4oz.E30 -? - - - - Z'-„�� INV'4co 05 c8-1k 4- -Top: 404.00 s�=o.5�io INV_ 3�8.Z0 Gj3 iYFEI T- :4 W /OI L SPAR&-TOlz TOP 404 INV: 3�-1.8JCN�E.> INV:400 4-5 (W. I NV: 3G1 8J C5 12" OJE�FtsJW : 40Z .OZ ORIFICE: Z�/8" 2m# C LPSC.1-T`/ CHAP N rYy_�K WI-AEN G& -TE p • • 6� a t�l W�' p� �I PE JJ��T 6 V CLE1\N - OUT GLTE Ga-TE , I 2' MIN MTD. yMPIG FDY.STD ?)CollIMI:3�.� 15" _ OR LIFT C�L�TE, NO. G/G CULV EST 1 NC . p 6• N O?- l F I CE I;ES I ICTO>? z DILIMETE'P- '. 3'/4" DE-►L�1 l_ CE:,-J± 1 O (TY PE IL 54") OIL/WL�TESZ PL��ANoi�l AND E 2IGTE��tFIGE T� N �4"DIA. 3 Dl C&-It Z - TV U-- 48" TOP: 401 ± INV W Z4") 1NV (N.Z4") Z-Z,4"CMP ' INV: 391 Col ---rsEe -DE TL I L_.) I. � I I , � o� cz�nnovE,� EX I GIB C-E# -7 _ U - 4-8" TO e- al--nN DON 4/ o� P�MOVED TOP' 4>3.40 NV 3,E-T 4o CW- z4') INV:3�7.4,D(E.Z4") :�G STOr.MWATER DRINAGE P%N NOTES 1. All constuction shall be in accordance with King County specifications. 2. Datum shal be K.C.A.S. unless otherwise approved by King County Department of Public Works. s I 3. All sedien_arionierosion facilities must be in operation prior to clearing and building construcrion, and thevnust be satisfactorily maintained until construction are completed and the potential for onsite eosion has passed. 4 Galvanizd steel pipe utilized as detention facilities shall have asphalt treatment 111 or herrer inside ad outside. 5. All disRrbed areas shall be seeded or stabilized by other Surface Water Management methods for the preventbn of onsite erosion after the completion of construction. 6. Grass seding w.11 be done using an approved type hydro -seeder, or as otherwise approved by King County 1partment of Public Works. The performance bond will not be released until the grass has been esablishe.i, unless otherwise approved by the King County Department of Public Works. 7. All pip shall )e laid o- a properly prefaced foundation according to Washington State Spec. 7-02.3(1).� This sh,ll incldt. necessary leveling of the trench bottom or the top of the foundation material as well s placement and t=on of required beddino material to unifoi-n grade so that the entire lenth d( the pi "ill be supported on a uriformly dense unyielding base. If the native material in tX pOCLra he trench meets the re^.uiremerrs f�= "Gravel fl.ckfill fez ^ipe BaddinF" the f1rac lift 3Epipe bedc.ng may 'e omitted provided the material in the bottom o: the trench is loose n regradl and cactpacred to fora a dense unyielding base. 8. All buijing downspouts and footing drains shall be connected to the storm drainage syster.', unless "otherwisk approved by the Department of Public Works. 9. All drai,age s;,juctures not on public right-of-ways shall have round, solid locking lids, unless ntherwis approved by the Department of Public Works. 10. Rock forerosi= protecton of roadside ditches, where required, shall be of sound quarry rock to a depth oft font. rock aggregate to be as follows: }" - 2" ---- 10% - 20% 2" - 4" ---- 20% - 40% 4" - 8" ---- 40% - 70% 11. Structures vial: not be permitted within 10' of the spring line of any storm drainage pipe(s), or 15' from the ?.0? of any channel bank. 12 The storm dn_nne system shall be constructed accordin& to the approved plans which are on file in the Departiot of Public Works Central Records. Any deviation from the approved plans will require written appr+vil from the proper agency, currently the King County Department of Public Works. 13 A copy of these alproved plans must be on the job site whenever construction is in progress. 11 Prior to anv construction/development-activity the King County Department of Public Works Development Inspection Sc:cciot must be contacted (Phone No. 255-2531) for a pre -construction meeting. 15 ALL R/D-FALI"ITIIt(WILL BE INSTALLED AND IN OPERATIO14 FRIOr IO OR IN CONJUNCTION WITH ALL CONSTRUCTION ACTIVITY {NiFSS TAT ACTIVITY EXCEEDS THE CAPACITY AND INTENT CF THE EROSION/SEDIMENTATION CONTPOL.. FACILITIES or UNLBS OTHERWISE APPROVED BY THE SURFACE WATERMANAGEMENT DIVISION. 16. All catch Basin gores shall be depressed 0.10 feet below pavement level. 17. Per King County Cde 20.50.100 $ection D., the person required to construct the facility pursuant to Section 20.10.60 shall maintain a liability policy in the amount of one hundred thousand dollars ($100,000) per inividual, three hurdred thousand dollars ($300,000) per occurrence and fifty thousand dollars ",50,000) property damage, which shall name King County as an additional insured, and which shall protect King County from any liability up to those amounts or any accident, ne^- ligen.ce, fa -lure of the facility, or any other liability whatsoever, relating to the construction or maintenance of be facility. Proof of said liability policy shall be provided to the Development Inspection Section, 155 Monroe Ave. N.E., Renton, WA 98055 (206-255-2531, or Operator assisted, ZENITH 5050, toll free) prior to setting up a pre -construction meeting, provided, that in the case of facilities assuied by King Pounty for maintenance pursuant to Section 20.50.110, said liability policy shall be terminated wheh said county maintenance responsibility commences. 18. Catch basir grates installed on County right-of-way shall conform to standard drawing No. 39 or No. 44 which inclties the stanping•"Outfall to stream, Dump no Pollutants" and "Property of King Counrv;" 19. Open cut rcac crossings for utility trenches on existing traveled roadway shall be backfilled only with pea gravel or 5/8 minus crushed road and mechanically compacted. Cuts into the existing asphalt shay. be neat line cut with sac.- or jackhammer in a continuous line. A temporary cold mix patch must be placed immediately after backfill and compaction. A permanent hot mix patch shall be placed within 30 nays and shall be the thickness of the original asphalt or twc inches, whichever is greater qt 20. All metal driveway culverts within County righteof-way must have concrete or masonry headwalls of acceptaAe design. 21. UTILITY INSTALLATION PLANS: Plans showing all underground utilities must be provided to the King Lour.- lepartment of Public Works Development Inspection Section, 155 Monroe Ave. N.E., Penton, WA 930$ (.06-255-2531; or Operator assisted, toll free number - ZENITH 5050). Plans for water and sanitary sewers must be provided prior to the pre -construction meeting. Plans for all other utilities must be provided prior to the installation of road base course materials. Swid y plans -shall 1hpw Foe location of the measures that will be taken to prevent soil erosion and sedi- meAtatior,. 22. Construction of dewatering (ground water) system shall be in accordance to the APWA Standard Specifice.tion, Section 61-3.02. Cot1»la. cON�-r T IN COt-1G . REFLEGTOS� - \ I4 PdDLG�K. Cl�L�IN�� ENDS - (0 ' I EMENDED IN I C:ONG . I I DEEP I I I I CONC. P�I.�K I I 1j C TQ I L- E M E2 C ICE EN l J�fd NCC.E- C�4TE I/Z.'I DI A. GALV Olz NON - COQi>?051\IE NUT >9 eCCT 3"MAX SP�E EN p N/I EW Al i STEEL PLC. S MUST SEE G-&-V,�sN 17ED AND L��F1 pis CoaTED (TREATMENT Z O�?- P�ETTE� ) 4 EA. /4" X Z" X s° STEEL_ 517P-QP. WELD TO 3/4" DIA . STFFI - HCOP T-P�ME FLOW CO SI taw \WELD ENC� T-O NET TO �_�GL1.1 �- ZO' W rn o UmJ o L.L 00 0 0 U)-00 L1J `° Z i O N C/) N 0 0 W 00 10 rn Q � a W 3 o Qz Z O -z 2 V Cn Q cc w LLJp_ fl a Z LL w o cc C/) n � C' J 0 C/) O O z w W a Wa Zs rn � U rn z4 c� W N 00 O J 0 W = =z W Q � W Li f � L1_ O W < J � W Q W z Qo Q 0 J Ow 0 OD O 2 Cf) 3: 0�5 X O O O LL ~ (z LLJ w � F' N Q C Za 0 > w LU p� 0� O N L0 4 N p1 0 z I'n O Z a w x w w a w (V 0 rf) cc 0 Q p = U U 0 oc - a DRAWING NO: 2 2 KESTREL BLUEPRINT INC. 3 ,`1e R-437002 C) rI I W STORMWATER DRAINAGE PLAN NOTES 1. All construction shall be in accordance with King County specifications 2. Datum shall be K.C.A.`• unless otherwise approved by King County Department of Public Works 3. All sedimentation/erosion facilities must be in oneration prior cc clearing and building construction, and they must be satisfactorily maintained until construction are completed and the potential for onsite erosion has passed. w Galvanized steel pipe utilized as detention facilities shall have asphalt treatment #1 or herrer inside and outside. 5. All disturbed areas shall be seeded or stabilized by other Surface Water Management methods for the prevention of onsite erosion after the completion of construction. 6. Grass seedink will be done using an approved type hydro -seeder, or as otherwise approved by King County Department of Public Works. The performance bond will not be released until the grass has been established, unless otherwise approved by the King County Department of Public Works. 7. All pipe shall be laid on a properly prepared foundation according to Washington State Spec. 7-02.3(1). This shall include necessary leveling of the trench bottom or the top of the foundation material as well as placement and compaction of required beddino material to uniform grade so that the enrire lenth of the pipe will be supported on a uniformly dense unyielding 'base. If the native material in the bottom of the trench meets the requirements for "Gravel Backfill for Pipe Bedding" the first lift of pipe bedding may be omitted provided the material in the bottom of the trench is loosened, regraded ,and compacted to form a dense unyieldin, base. 8. All building downspouts and footing drains shall be connected to the storm drainage systerl, unless otherwise approved by the Department of Public Works. 9. All drainage structures not on public right-of-ways shall have round, solid locking lids, unless otherwise approved by the Department of Public Works. 10. Rock for erosion protecton of roadside ditches, where required, shall be of sound quarry rock to a depth of 1 foot. rock aggregate to be as follows h" - 2" ---- 10% - 20% 2" - 4" ---- 20% - 40% 4" - 8" ---- 40% - 70% 11. Structures shall not be permitted within 10' of the spring line of any storm drainage pipe(j). or 15' from the top of any channel bank. 12. The storm drainage system shall be constructed according to the approved plans which are on file in the Department of Public Works Central Records. Any deviation from the approved plans will require written approval from the proper agency, currently the King County Department of Public Works. 13. A copy of these approved plans must be on the job site whenever construction is in progress 14. Prior to any construction/development activity the King County Department of Public Works Development Inspection Section must be contacted (Phone No. 255-2531) for a pre- construction meeting. 15. ALL R/D FACILITIES WILL BE INSTALLED AND IN OPERATION PRIOR TO OR IN CONJUNCTION WITH ALL CONSTRUCTION ACTIVITY UNLESS THAT ACTIVITY EXCEEDS THE CAPACITY AND INTENT CF THE EROSION/ SEDIM$NTATION nnNTIIOL rACILITIES or UNLESS OTHERIJISE APPROVED BY THE SURFACE WATER MANAGF1fENT DIVISION. 16. All catch Basin grates shall be depressed 0.10 feet below pavement level. 17. Per King County Code 20.50.100 Section D., the person required to construct the facility pursuant to Section 20.20.050 shall maintain a liability policy in the amount of one hundred thousand dollars ($100,000) per individual, three liur.dred thousand dollars ($300,000) per occurrence and fifty thousand dollars ($50,000) property damage, which shall name King County as an additional insured, and which shall protect King County from any liability up to those amounts or any accident, nei•- ligence, failure of the facility, or any other liability whatsoever, relating to the construction or maintenance of the facility. Proof of said liability policy shall be provided to the Development Inspection Section, 155 Monroe Ave. N.E., Renton, WA 98055 (206-255-2531, or Operator assisted. ZENITH 5050. toll free) prior to setting up a pre- construction meeting, provided, that in the case of facilities assumed by King County for maintenance pursuant to Section 20.50.110, said liability policy shall be terminated when said county maintenance responsibility commences. 18. Catch basin grates installed on County right-of-way shall conform to standard drawing No. 39 or No. 44 which includes the stamping "Outfall to stream, Dump no Pollutants" and "Property of King nounry." 19. Open cut road crossings for utility trenches on existing traveled roadway shall be backfilled only with pea gravel or 5/8 minus crushed road and mechanically compacted. Cuts into the existing asphalt shall be neat line cut with saw or jackhammer in a continuous line. A temporary cold rrix patch must be placed immediately after backfill and compaction. A permanent hot mix patch shall be placed within 30 days and shall be the thickness of the original asphalt or two inches, whirhever is greater. 20. All metal driveway culverts within County right-of-way must have concrete or masonry headwalls of acceptable design. 21. UTILITY INSTALLATION PLANS: Plans showing all underground utilities must be provided to the King County Department of Public Works Development Inspection Section, 155 Monroe Ave. N.F.., Penton, WA 98055 (206-255-2531, or Operator assisted, toll free number - ZENITH 5050). Plans for water and sanitary sewers must be provided prior to the pre -construction meeting. Plans ror all ocher utilities must be provided prior to the installation of road base course materials. Said plans shall show the location of the measures that will be taken to prevent soil erosio sedi- / mentation. 22. Construction of dewatering (ground water) system shall be in accordance t e APWA Standarc Specification, Section 61-3.02. FNCE` E NEW GUtz e ,i • k tV ��A oQ J •• �0 V4.SZ1E5 (01 E)n ULVEC) coN(w�Tc C�� \JLRIG-s / A C71 GC TYPICAL— ��/EMEN-i SEG-T1o� NTH .111d1'7 a �ti • g10o� A� o L (TyQ\tK�1� i �\ C 0S ° A �y �00�. �'Q�b \n N� 47 j NO tx��• N / / 1 0 NO °` a�t' �—N 1 � � �\u •t o,J �� k� �� ,'-� �� , •� ocv� � tk bra , ,,•°, ��—►-.uGEXIsT PIPE To-n4E NOETH T F-EM OV E EX p-r. GUI lCeMOVE exlsT. s1DEwaL1l_ br /` NAG � � 11� / / • "A W`ti h i�• 0 M Vto Z > N a CcoN U7 0 0 W�0 Q � Q 00 W 3 0 Q % Z L O X—Z uQ W cc _J WQ 0 LL Q Z p W = (n H V J 0 O O M Z a W W Q Wa Z _ r� H V 0 I (D Z M W r- 0 z U) _z J z (o Ld _z z Y E 1--2 W a. 0 \� 0� < w lL W Q 0 � Op Vn? �; k 0 XIV °,JpA W z Dw o � Q O X J LLJ 0 z LL 0 z w ti Go 'ti� SURFACE WATER - MANAGEMENT DIVISION IZ coin . _ FIELD CHANGE APPROVAL El THIS APPROVAL IS FOR CHANGES �� J� �✓ SPECIFIED IN FIELD CHANGE NO 7 DATEp,L NLY AND REVISES THE PLAN APPROVED ON 67, DATE 1`2 IG D_ �,F_DWSFA C.uP—B .• � N�DP�D S�pt✓V��1� MWA � a Z 1L o w � Cr 0 \ Z Y Z U UJ W U cc a 2 U cccc — 0 0 U (n a DRAWING N0: ESTREL BLUEPRINT INC R-437003