9908 18TH AVE W 2022 Plans 2025-03-28

TBLOCK TBLOCK-ec PTN. OF SW 1/4,SE 1/4 OF SEC 14,Till28 N, R4E W.M. Q 2 N m HI n 2' 2' N N w D; 18"MIN. 12"COMPACT No DEPTH QUARRY SPALLS o 40 ROCK LINED Ft�y o 2 1 � N - NOTES: \� _ TYPE 11 QUARRY SPALLS zo w CI'm 1.EARTH OR GRASS LINED DITCHES MAY ONLY BE USED WITH PRIOR APPROVAL OF THE \\ A B h y <• COUNTY INSPECTOR AND WHERE LONGITUDINAL SLOPES OF 6%OR LESS AND A MAXIMUM /�/\//\//\/\ \ L e w FLOW VELOCITY OF 5FPS EXISTS. \'�\��\//��/\//\// / APPROX LIMIT OF GRADING a, )RK AREA 2 ROCK GREATER 3% SHALL BE USED IN EARTH OR GRASS LINED DITCHES FOR SLOPES ��VA�AA��\//� ROADWAY IMPROVEMENTS WVARIES ? a m CHECK DAM SPACING J.ROCK LINED DITCHES SHALL BE USED WHEN SLOPES EXCEED 6%OR FOR FLOW VELOCITY PER PLAN GREATER THAN 5FPS. L=THE DISTANCE SUCH THAT POINTS A AND B ARE OF EQUAL ELEVATION IW z m MAINTENANCE STANDARDS: a CONTINUOUS ORANGE o CONSTRUCTION FENCING(ORANGE CONSTRUCTION FENCE, ANY SEDIMENT mEPOS1T10N OF MORE THAN 0.5 FEET SHALL BE REMOVED SO THAT THE CHANNEL a PLASTIC)AT EXIST. GRADE UPSLOPE AND TENSAR DR EQUAL IS RESTORED TO ITS DESIGN CAPACITY. TEMP. DITCH OR DOWNSLOPE OF DISTURBED AREAS AND s I. SCALE, PER PLAN LEVEL AREAS ADJACENT TO SENSITIVE el a IF THE CHTHE PROBLEM ITY IS INSUFFICIENT FOR THE DESIGN STORM, R MUST A DETERMINED THE II TOMQUARRYAN SPILLS MUST COMPLETELY COVER ROUGH OR AREA TRACT BUFFER WHETHER THE PROBLEM IS LOCAL(E.G., A CONSTRICTION OR BEND)OR THE CHANNEL IS THE BOTTOM AND SIDES OF THE DITCH FINISHED GRADE UNDEROESIGNED. IF THE PROBLEM IS LOCAL, THE CHANNEL CAPACITY MUST BE INCREASED _ Z� 'v THROUGH CONSTRUCTION OF A BERM(S)OR BY EXCAVATION. IF THE PROBLEM IS UNDERDESIGN, \\ e 6"MAX. T EXIST. GRADE THE DESIGN ENGINEER SHALL BE NOTIFIED AND THE CHANNEL REDESIGNED TO A MORE \//\ /// ?,•� P CONSERVATIVE STANDARD TO BE APPROVED BY SNOHOMISH COUNTY. 4"MIN. Mqr c FFs TE\ \ \\// III III— ONAL Orl�7 THE CHANNEL SBALL BE EXAMINED FOR SIGNS OF SCOURING AND EROSION OF THE BED AND \/\\/ /\\/% FINISHED SLOPE, I`Y BANKS. IF SCOURING OR EROSION HAS OCCURRED, AFFECTED AREAS SHALL BE PROTECTED BY \\\\\\\\\\\\\\\\\\\\\\\\\\\ \ice PER PLAN CLEARING LIMITS RIP-RAP OR AN EROSION CONTROL BLANKET OR NET. / /////,�///,�///,�///�///�///�///.� N01E ROCK CHECK DAM TIP. SILT FENCE AT EXIST. SEE NOTES ON ESC PLAN(SHEET C7.00) CROSS SECTION GRADE DOWNSLOPE OF FOR ADDITIONAL LIMITS FOR SILT FENCE METAL FENCE POSTS DISTURBED AREAS(SEE NOTE) LOCATION/PHASING. I_ 10'MAX _ OR WOOD STAKE TEMPORARY INTERCEPTOR DITCH ROCK CHECK DAM TYPICAL CLEARING LIMITS CONSTRUCTION FENCE (TIP.) NOT TO SCALE NOT TO SCALE NOT TO SCALE NOT TO SCALE z Figure 11-3.30:Sediment Pond Riser Detail 3 0 0 Prwme aaegaate o Po"hylene cap slrepping =O Perforated Corrugated polyethylene drainage _____ metal riser tubing,diameter min. _==- LIJ 2'largerthan ___- r\/ dewatean9 or'flce. 3.5 m'n. LL Tubing shall comply = Watertight I D—hniing oaf e. Wit,ASTM F667 and _-_-_-_ -upling schedule 40 steel W AASHTO M294. Tack weld stub min.diiameler per celwlatbns 6'MIN. 6•m1n. 12"MIN. (J J f---" 12"MIN. J 18'min. T TACK T _ 12"MIN.Conmete base llernat ely,metl 'slakes andremaybe M / Wacedmpre"antnmatonNATIVE SOI 2"TO 4"ROCKaser dia.min. COMPACTEDL J U U+ 3/a"TO 1Y2"WASHED GRAVEL z m W GEOTEXTILE LI..I a ~ OUTLET m L U STABILIZE EXPOSED SIDE SLOPES WITH VEGETATION OR EQUIVALENT MEASURES CLIENT 12"MIN. OVERFLOW 4'MIN. TOP OF BERM PACIFIC RIDGE HOMES DEPTH(TYP.) SEDIMENT TRAP SUMMARY TABLE o NOT TO SCALE QUARRY SPILL PROTECTION 1792160THELL-EVERETT HWY AT OVERFLOW MINIMUM WATER W,S. ELEV. FACILITY NO. IMPERVIOUS(AC.) PERVIOUS(AC.) TOTAL(AC.) DESIGN Q,(CFS)+ SURFACE AREA W.S. ELEV. (FT.) BOT. ELEV. (FT.) SUITE 100 BOTHELL,WA 95012 (SF) PHONE:(425)438-6444 Sediment Pond Riser Detail �q i SED. TRAP po Revered June 2016 "�__ _ _ 12"MIN. 0.70 0.26 0.96 0.315 656 SEE PLAN SEE PLAN 3 DEPARTMENT OF �, ,�. 12"MIN' (NORTH) 2"TO 4"ROCK SED. TRAP ECOLOGY P��a�hrcpiwwwecywa.go pyagm.nmarnr opydgntnm ainolaaingparmisson:, J/"TO 1Y2"WASHED GRAVEL SOUTH 0.15 0.08 0.23 0.070 146 SEE PLAN SEE PLAN C P H State of Washington rmitation ofliability,and disclaimer. NON-WOVEN (SOUTH) ) " FILTER FABRIC '1 •Q2 FLOW RATE ARE THE 2-YEAR, 24-HOUR PEAK FLOWS DETERMINED BY USING WWHM 2012 MODELING. DISCHARGE TO STABILIZED .*THE DETENTION VAULT SHALL BE USED AFTER IT IS CONSTRUCTED AND THE STRUCTURAL ELEMENTS HAVE BEEN INSPECTED AND APPROVED FOR OPERATION. ONCE CONVEYANCE PATH OR OPERATIONAL, BOTH SEDIMENT TRAPS CAN BE REMOVED. CONSULTANTS APPROVED OUTLET PIPE i Site g g 2019 Stormwater Management Manual for Western Washington g•Civil Pn ineenn Lo�tlscapeA Volume 11-Chapter 3-Page 394 SECTION 1321B E IMt �Conwlting Skeet 90 TEMPORARY SEDIMENT TRAP IO Y 0hW�t&ea•A,2en'�85�;ta 3 s TEMPORARY EROSION CONTROL IS DESIGNED TO MEET FLOW CONTROL UTILIZING A SEDIMENT wenotonee.wa seeon lsosl2van3l ~ NOT TO SCALE f°lw TRAP, WHICH DOES NOT REQUIRE A RISER. ULTIMATELY, THE SEDIMENT AND FLOW CONTROL www.�pn�ooratranr:.�om WILL BE MITIGATED BY THE PROPOSED PERMANENT DETENTION VAULT. SIZING FOR PROTECT NO. a DEWATERING ORIFICE, PRINCIPAL SPILLWAY, EMERGENCY SPILLWAY, AND MINIMUM SEDIMENT 0132-21-026 N FLOW CONTROL SIZING ARE PROVIDED ON THIS SHT. THEY ARE PROVIDED FOR THE FINAL CONFIGURATION USING THE PERMANENT STORMWATER SYSTEM AND FOR THE TEMPORARY TRAP DRAWING iN IF A RISER IS REQUIRED DURING CONSTRUCTION DUE TO FIELD CONDITIONS. C1.101 v • CONTRACTOR/CESCL ARE RESPONSIBLE FOR DETERMINING APPROPRIATE EROSION CONTROL o� BMPS MODIFICATION AS NEED TO MEET ECOLOGY NPDES PERMIT REQUIREMENT.. a� 8h amers below. SHEET 6 OF 14 oG611 belOre ou tli. Copy Ot®] 3 CPH Consultants,LLC.All Rlghts ReserveE.