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Home My WebLink AboutR-383609(C) CMMJ L'MW J I 0 I 0 W PERMEABLE PAVEMENT NOTES: 1. ONE OF THE FOLLOWING TYPES OF PERMEABLE PAVEMENT MUST BE USED • POROUS CONCRETE • POROUS ASPHALTIC • PERMEABLE PAVERS • MODULAR GRID PAVEMENT • GRASSED MODULAR GRID PAVEMENT 2. PERMEABLE PAVEMENTS SHALL BE INSTALLED IN ACCORDANCE WITH THE MANUFACTURER'S SPECIFICATIONS, EXCEPT WHEN SUCH SPECIFICATIONS ARE LESS STRINGENT THAN THOSE SET FORTH IN SECTIONS C.2.6.2 THROUGH C.2.6.6. OF APPENDIX C OF THE 2005 KING COUNTY SURFACE WATER DESIGN MANUAL. 3. PERMEABLE PAVEMENTS SHALL NOT BE PLACED ON SLOPES STEEPER THAT 10%. MAINTENANCE INSTRUCTIONS FOR NON -VEGETATED PERMEABLE PAVEMENT YOUR PROPERTY CONTAINS A STORMWATER MANAGEMENT FLOW CONTROL BMP (BEST MANAGEMENT PRACTICE) CALLED "PERMEABLE PAVEMENT," WHICH WAS INSTALLED TO MINIMIZE THE STORMWATER QUANTITY AND QUALITY IMPACTS OF SOME OR ALL OF THE PAVED SURFACES ON YOUR PROPERTY. PERMEABLE PAVEMENTS REDUCE THE AMOUNT OF RAINFALL THAT BECOMES RUNOFF BY ALLOWING WATER TO SEEP THROUGH THE PAVEMENT INTO A FREE -DRAINING GRAVEL OR SAND BED, WHERE IT CAN BE INFILTRATED INTO THE GROUND. THE TYPE OF PERMEABLE PAVEMENT USED ON YOUR PROPERTY MAY BE ONE OF THE FOLLOWING: POROUS CONCRETE, POROUS ASPHALTIC CONCRETE, PERMEABLE PAVERS OR MODULAR GRID PAVEMENT. THE AREA COVERED BY PERMEABLE PAVEMENT AS DEPICTED BY THE FLOW CONTROL BMP SITE PLAN AND DESIGN DETAILS MUST BE MAINTAINED AS PERMEABLE PAVEMENT AND MAY NOT BE CHANGED WITHOUT WRITTEN APPROVAL EITHER FROM THE KING COUNTY WATER AND LAND RESOURCES DIVISION OR THROUGH A FUTURE DEVELOPMENT PERMIT FROM KING COUNTY. PERMEABLE PAVEMENTS MUST BE INSPECTED AFTER ONE MAJOR STORM EACH YEAR TO MAKE SURE IT IS WORKING PROPERLY. PROLONGED PONDING OR STANDING WATER ON THE PAVEMENT SURFACE IS A SIGN THAT THE SYSTEM IS DEFECTIVE AND MAY NEED TO BE REPLACED. IF THIS OCCURS, CONTACT THE PAVEMENT INSTALLER OR THE KING COUNTY WATER AND LAND RESOURCES DIVISION FOR FURTHER INSTRUCTIONS. A TYPICAL PERMEABLE PAVEMENT SYSTEM HAS A LIFE EXPECTANCY OF APPROXIMATELY 25 -YEARS. TO HELP EXTEND THE USEFUL LIFE OF THE SYSTEM, THE SURFACE OF THE PERMEABLE PAVEMENT SHOULD BE KEPT CLEAN AND FREE OF LEAVES, DEBRIS, AND SEDIMENT THROUGH REGULAR SWEEPING OR VACUUM SWEEPING. THE OWNER IS RESPONSIBLE FOR THE REPAIR OF ALL RUTS, DEFORMATION, AND/OR BROKEN PAVING UNITS. MAINTENANCE INSTRUCTIONS FOR VEGETATED PER EAGLE PAVEAENT YOUR PROPERTY CONTAINS A STORMWATER MANAGEMENT FLOW CONTROL BMP (BEST MANAGEMENT PRACTICE) CALLED "GRASSED MODULAR GRID PAVEMENT," WHICH WAS INSTALLED TO MINIMIZE THE STORMWATER QUANTITY AND QUALITY IMPACTS OF SOME OR ALL OF THE PAVED SURFACES ON YOUR PROPERTY. GRASS MODULAR GRID PAVEMENT HAS THE RUNOFF CHARACTERISTICS OF A LAWN WHILE PROVIDING THE WEIGHT-BEARING CAPACITY OF CONCRETE PAVEMENT. THE GRASSED SURFACE NOT ONLY MINIMIZES RUNOFF QUANTITY, IT HELPS TO FILTER POLLUTANTS GENERATED BY VEHICULAR USE OF THE SURFACE. THE COMPOSITION AND AREA OF GRASSED MODULAR GRID PAVEMENT AS DEPICTED BY THE FLOW CONTROL BMP SITE PLAN AND DESIGN DETAILS MUST BE MAINTAINED AND MAY NOT BE CHANGED WITHOUT WRITTEN APPROVAL EITHER FROM THE KING COUNTY WATER AND LAND RESOURCES DIVISION OR THROUGH A FUTURE DEVELOPMENT PERMIT FROM KING COUNTY. GRASSED MODULAR GRID PAVEMENT MUST BE INSPECTED AFTER ONE MAJOR STORM EACH YEAR TO MAKE SURE IT IS WORKING PROPERLY. PROLONGED PONDING OR STANDING WATER ON THE PAVEMENT SURFACE IS A SIGN THAT THE SYSTEM IS DEFECTIVE AND MAY NEED TO BE REPLACED. IF THIS OCCURS, CONTACT THE PAVEMENT INSTALLER OR THE KING COUNTY WATER AND LAND RESOURCES DIVISION FOR FURTHER INSTRUCTIONS. THE GRASSED SURFACE OF PORTION 0�= SE 1/4, SW l/4, SSC. 28, T -23N, R-5�, W_M_ KING COUNTY DESIGN MANUAL: C.2.6.2 POROUS CONCRETE POROUS CONCRETE CONSISTS OF A MIX OF AGGREGATE, CEMENT PASTE, WATER AND ADMIXTURES, BUT CONTAINS LESS FINE AGGREGATE THAN CONVENTIONAL CONCRETE. VOIDS IN THE HARDENED CONCRETE ALLOW WATER TO DRAIN THROUGH THE SURFACE INTO THE SUBGRADE. USES: SIDEWALKS, PATIOS. PARKING AREAS, AND DRIVEWAYS. DESIGN SPECIFICATIONS 1. A MINIMUM OF 6 INCHES OF FREE -DRAINING SAND OR GRAVEL BASE IS REQUIRED UNDER THE POROUS CONCRETE SURFACE. C.2.6 PERMEABLE PAVEMENT 2009 SURFACE WATER DESIGN MANUAL - APPENDIX C 1!9%2009 C-65 2. THE FREE -DRAINING BASE SHALL HAVE LESS THAN 5 % FINES (MATERIAL PASSING THE #200 SIEVE) BASED ON THE FRACTION PASSING THE #4 SIEVE. 3. THE POROUS CONCRETE PAVEMENT SHALL BE PERMEABLE ENOUGH TO ABSORB WATER AT A MINIMUM RATE OF 10 INCHES PER HOUR IMMEDIATELY AFTER THE PAVEMENT SURFACE HAS BEEN WETTED CONTINUOUSLY FOR AT LEAST 10 MINUTES. COMPLIANCE WITH THIS MINIMUM RATE SHALL BE CHECKED PRIOR TO CONSTRUCTION APPROVAL OF THE PAVEMENT. COMPLIANCE MAY BE CHECKED USING A SIMPLE BUCKET TEST IN WHICH 5 GALLONS OF WATER ARE POURED ONTO THE PAVEMENT SURFACE ALL AT ONCE FROM A 5 -GALLON BUCKET. IF NOTHING BUT A SCANT AMOUNT OF WATER PUDDLES OR RUNS OFF THE SURFACE, THEN THE PAVEMENT IS CONSIDERED TO MEET THE MINIMUM RATE OF ABSORPTION. IF THIS TEST IS NOT CONCLUSIVE, THEN A 6 -INCH RING SEALED AT THE BASE TO THE PAVEMENT SURFACE SHALL BE USED TO MEASURE THE ACTUAL RATE OF ABSORPTION. 4. POROUS CONCRETE SIDEWALKS PLACED IN COUNTY ROAD RIGHT-OF-WAY (NOTE THAT A ROAD VARIANCE IS REQUIRED FOR SUCH PLACEMENT) OR ON PRIVATE PROPERTY SUBJECT TO VEHICLE LOADING SHALL BE A MINIMUM OF 5 INCHES THICK AND SHALL HAVE A MINIMUM 28 -DAY COMPRESSIVE STRENGTH OF 3000 PSI. 5. SIDEWALKS AND PATIOS ON PRIVATE PROPERTY NOT SUBJECT TO VEHICLES SHALL BE A MINIMUM OF 4 INCHES THICK AND SHOULD HAVE A MINIMUM 28 -DAY COMPRESSIVE STRENGTH OF 2000 PSI. C.2.6.3 POROUS ASPHALTIC CONCRETE POROUS ASPHALTIC CONCRETE USES A MIX THAT CONTAINS LESS FINE AGGREGATE THAN CONVENTIONAL ASPHALTIC CONCRETE. VCiDS IN THE PAVEMENT ALLOW WATER TO DRAIN THROUGH THE SURFACE INTO THE SUBGRADE. USES: SIDEWALKS, PATIOS, PARKING AREAS, AND DRIVEWAYS. DESIGN SPECIFICATIONS SAME AS FOR POROUS CONCRETE, EXCEPT THAT THE COMPRESSIVE STRENGTH SPECIFICATIONS DO NOT APPLY AND THE PAVEMENT SECTION SHALL BE AS NEEDED TO PROVIDE A SERVICE LIFE EQUIVALENT TO CONVENTIONAL ASPHALTIC CONCRETE. I APARTMENTS ----------- APARTMENTS j l EMAIL BOX! l i . BLDG I ; POWE�L! f� / AUL./�1�11/l11%/ OWER ANSFORMER ,_z 1/l11 -1111/ ��11 / ' -------SPLIT-FACE ;� I�/// GRAPHIC SCALE 20 0 10 20 40 t--- - ----- - ( IN FEET ) 1 inch = 20 ft. ASPHALT UMP THE PAVEMENT MUST BE REGULARLY MOWED AND MAINTAINED IN A GOOD E 1 CBI CONDITION. BARE SPOTS MUST BE REPLANTED IN THE SPRING OR FALL. =�5f 5 9( 5.0� 1'•\ A TI 1L A BENCHMARKS C.O.R. BENCHMARK No.1969 I ELEV. = 398.251 NAIL IN TOP OF METAL PIPE IN CASE AT X-ING SE 176TH ST AND BONNEVILLE POWER LINE KC BENCHMARK REFPT 3876 ELEV. = 397.689 ALUMINUM DISK SET FLUSH WITH CONIC WALK AT SOUTH SIDE OF PETROVITSKY RD. N. OF HOUSE No. 12325 CHECKED FOR COMPLIANCE TO CITY STANDARDS "REViSIONS� N0. DATE 1 05/14/14 2 04/07/15 3 08/13/15 4 04/09/18 3 3(30. LF, 8"I Ry@} O.6(3.41)%-`- DESIGN(TYP)J Vr AS-BUILT(TYP) , L--CET-ENTION VAULT GRA\�_ACCESS �39&_"� l� OHP ------ OHP _- s -- �<-- -r-- ------ -- - -- -- --- Ir--ii - ---- - T -- ---- - --- 59. ---r--- 4 < < S < < RIM=390.56 RIM=390.04 \ N IE(8"N)=379.36 w IE(8"W)=379.35 - - - - -- ' E 8 S =;'3_79. 2 9 MR-TYP p I)RIM=390.16 IE(S)=385.76 i IE(E N)=386.0 "- `X. DRIVEWA`! APPROACIH - -OR TH PROPOSE APARTM4 - - - LEGEND 0 SANITARY SEWER MANHOLE �❑ - ® o p -- LEGEND 0 SANITARY SEWER MANHOLE �❑ STORM DRAIN MANHOLE ® STORM DRAIN CATCH BASIN --� EX. CULVERT ❑® POWER TRANSFORMER CABLE TV RISER �- UTILITY POLE ANCHOR -0- UTILITY POLE POWER POLE WITH DROP POWER POLE WITH DROP&TBOX POWER POLE WITH DROP&LIGHT -OH P- OVERHEAD POVER = EXISTING SIGN ❑ TELEPHONE RISER o MAIL BOX C£ FIRE HYDRANT ® WATER METER �Q WATER VALVE ____I3 E3 WOOD FENCE (WDF) i- ':, 4„ aVFEI<tC+i- BRAN) f4i�QOTi14 ` .. r.. r .................... V Ns. t fYP) --T.-.'.......'.77'.77.' • �. . .. t Rmc. TO £�9i M- T€ ! P I#8. F 96; 7 ..... ., 2• ' ' `� �r .. ...�� -x-X CHAIN LINK FENCE (CLF) 7.3 PROPOSED ; `., CXD00 EX. ROCKERY ?" WATER BUILDING 1 FF S B 397 3 / 4" PVC ROOF-PRAIN LINE ABOVE ` s EX. PAVLMENT ��► METER (TYP.) �C/? 4" PVC FRENCH -DRAIN AT FOOTING UNIT 1B UNIT 1C UNIT 1D.,' , ( o DRAIN TO STORM SYSTEM - SEE ARCH PLANS 1A UNIT �' � EX. GRAVEL X96 N-10.5(5.5)LF 8" CPEP(8" PVC 944(0)% I i 20' FRONT YARD BSBL INSTALL NEW TYPE 1 _CS --59 EX. CONCRETE RIM 394. ?(394.45} xS5 -- -- - - - IE 391.0 NZI)NW EL 97.5 IE (39k5)S OP OF BOARD g =� 11JR�AIN a _ _ /--EX. 5' - 8" DI CULVERT- REPLACE WITH 252"DI 0 4.5% - - _ -- - IE= 392 2 „ 2'(21)-12"DI 0 4.5(10)%� ALDER y B TTOM EL 394. ;, / CB TYPE I - - RIM=392.30 NEW PERVIOUS PAVEMENT _T aftPOWER IE(N)=3W.85 SEE NOTES AND SPECIFICATIONS SHEET 3 7 34LF S _ VAULT _ 1' BERM EL=396. -- 3. L 8 DI 0 5.7% f EXISTING NEW PERVIOUS CONCRETE .._. - -0 -- - ---- FIRE HYDRANT E CB TYPE -L LIDS VED SEE NOTES AND SPECIFICATIONS SHEET 3 )i'ATER, MAEINS , EWA �C IE(S,W,E)T389:3� '' E _ EX.' $IDEWA�LK . BOOS 'CREEK - - -- - - DRIVEWAY < .;.� __ _��1T � ..ALK EX. DR - - -- 9LF 12" CMP0 1.72% 1 7.5LF 12" ®1.8 � 9.5' D D;CATION O PUBIC FOR RIGHT OF WAY CB TYPE I LI RIM -3T 89 gI lt'VAT�R MAIN I t RIM=393.79 IE(N)=386.42 APROXM. IE(W)=390.71 IE(S)=386 31 LOCA! - _ - - - - I - ---- - - - - -- N88 40 51 E --- - N88'40'51"E �� S.E. PETROVITSKYRC�AD _ _ _ _. SID ZE SA, 5LF 1� E < p SDMH TYPE II DMH TYPE II DMH FLOW CONTROL MH RIM=390.26 IM=391.86 RIM=390.72 IE(SW)=384.61 IE(W)=381.27 36" IE(N,SE)=385.17 IE(NE)=384.47 OVERFLOW=386.38 18" NOTE: CALL PREPARED BY _.. OHPP_. \SDCB RIM=389.79 -800-424-5555 BEFORE YOU DIG 8627 NE 180th St. A N S T E Y BOTHELL, WA 98011 PHONE: (206) 303-7639 ENGINEERING FAX: (425) 486-0267 EMAIL: benanstey@juno.com - --- -- ---- R-383609 _ � N --ASI-BUILT SET UNDERGROUND PIPE LOCATION BASED ON SURFACE FEATURES. ACTUAL LOCATION MAY VARY. I CONFIRM THAT THE LOCATIONS, ELEVATIONS, DEPTHS, AND AS -BUILT COMMENTS REFLECTING NokTERIALS ACTUALLLY USED DURING CONSTRUCTION, ACCURATELY REFLECTS EXISTING FIELD CONDITIONS AS DETERMINED BY ME OR UNDER MY DIRECT SUPERVISION. BURIED UTILITIES IN AREA CALL BEFORE YOU DIG 1 -800-424-5555 EXISTING UTILITIES SHOWN ARE FROM THE BEST AVAILABLE INFORMATION AND NO GUARANTEE IS MADE AS TO THE EXACT SIZE, TYPE, LOCATION OR DEPTH. SHEET TITLE