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TBLOCK <br />TBLOCK-ec <br />PTN. OF SW 1/4, SE 1/4 OF SEC 14, TWP 28 N, R4E W.M. <br />U N f <br />U <br />i <br />Y <br />0 <br />18" MIN. <br />DEPTH <br />2' 2' <br />ROCK LINED <br />12" COMPACT <br />QUARRY SPALLS <br />NOTES: <br />I. EARTH OR GRASS LINED DITCHES MAY ONLY BE USED WITH PRIOR APPROVAL OF THE <br />COUNTY INSPECTOR AND WHERE LONGITUDINAL SLOPES OF 6% OR LESS AND A MAXIMUM <br />FLOW VELOCITY OF 5FPS EXISTS. <br />2. ROCK CHECK DAMS SHALL BE USED IN EARTH OR GRASS LINED DITCHES FOR SLOPES <br />GREATER THAN 37. <br />3. ROCK LINED DITCHES SHALL BE USED WHEN SLOPES EXCEED 6% OR FOR FLOW VELOCITY <br />GREATER THAN 5FPS. <br />MAINTENANCE STANDARDS: <br />ANY SEDIMENT MEPOSITION OF MORE THAN 0.5 FEET SHALL BE REMOVED SO THAT THE CHANNEL <br />IS RESTORED TO ITS DESIGN CAPACITY. <br />IF THE CHANNEI2.CAPACITY IS INSUFFICIENT FOR THE DESIGN STORM, IT MUST BE DETERMINED <br />WHETHER THE PROBLEM IS LOCAL (E.G., A CONSTRICTION OR BEND) OR THE CHANNEL IS <br />UNDERDESIGNED. IF THE PROBLEM IS LOCAL, THE CHANNEL CAPACITY MUST BE INCREASED <br />THROUGH CONSTRUCTION OF A BERM(S) OR BY EXCAVATION. IF THE PROBLEM IS UNDERDESIGN, <br />THE DESIGN ENGINEER SHALL BE N077FIED AND THE CHANNEL REDESIGNED TO A MORE <br />CONSERVA77VE STANDARD TO BE APPROVED BY SNOHOMISH COUNTY. <br />THE CHANNEL S®ALL BE EXAMINED FOR SIGNS OF SCOURING AND EROSION OF THE BED AND <br />BANKS. IF SCOURING OR EROSION HAS OCCURRED, AFFECTED AREAS SHALL BE PROTECTED BY <br />RIP -RAP OR AN EROSION CONTROL BLANKET OR NET. <br />TEMPORARY INTERCEPTOR DITCH <br />NOT TO SCALE <br />Figure 11-3.30: Sediment Pond Riser Detail <br />Polyethylene cap <br />Provide adequate <br />strapping <br />A B TYPE II QUARRY SPACES <br />L <br />CHECK DAM SPACING <br />L=THE DISTANCE SUCH THAT POINTS A AND B ARE OF EQUAL ELEVATION <br />TYPE 11 QUARRY SPALLS MUST COMPLETELY COVER <br />THE BOTTOM AND SIDES OF THE DITCH <br />6" MAX. <br />ROCK CHECK DAM <br />NOT TO SCALE <br />CROSS SECTION <br />CHECK DAM <br />l5#jc7.WU1c1.fj <br />ROADWAY IMPROVEMENTS <br />TEMP. DITCH OR <br />SWALE, PER PU <br />ROUGH OR <br />FINISHED GRADE — <br />FINISHED SLOP <br />PER PLAN <br />TYP. SILT FENCE AT EXIST. <br />GRADE DOWNSLOPE OF <br />DISTURBED AREAS (SEE NOTE)J <br />TYPICAL CLEARING LIMITS <br />NOT TO SCALE <br />VARIES <br />PER PLAN <br />APPROX. LIMIT OF GRADING <br />CONSTRUCTION FENCING (ORANGE <br />PLASTIC) AT EXIST. GRADE UPSLOPE AND <br />DOWNSLOPE OF DISTURBED AREAS AND <br />LEVEL AREAS ADJACENT TO SENSITIVE <br />AREA TRACT BUFFER <br />EXIST. GRADE <br />CLEARING LIMITS <br />NOTE.• <br />SEE NOTES ON ESC PLAN (SHEET C1.00) <br />FOR ADDITIONAL LIMITS FOR SILT FENCE <br />LOCATION/PHASING. <br />CONTINUOUS ORANGE <br />CONSTRUCTION FENCE, <br />TENSAR OR EQUAL <br />r _--�`— METAL FENCE POSTS <br />10' MAX. OR WOOD STAKE <br />CONSTRUCTION FENCE (7YP.) <br />NOT TO SCALE <br />d <br />z <br />S <br />-41 rsSl�,=.;rG. <br />THE AS -BUILT INFORMATION <br />SHOWN ON THIS PLAN IS PER <br />A FIELD SURVEY PERFORMED <br />BY PACIFIC COAST SURVEYS, <br />INC. AND/OR RECORD DATA <br />PROVIDED BY THE <br />CONTRACTOR. <br />Perforated <br />Corrugated <br />polyethylene drainage <br />=___ metal riser <br />W <br />tubing, diameter min. <br />-___- <br />2" larger than <br />dewatering orifice. <br />-___- <br />----- <br />3.5' min. <br />Tubing shall comply <br />Watertight <br />Devwatering orifice, <br />with ASTM F667 and <br />_--==- <br />_--- coupling <br />schedule 40 steel <br />W <br />AASHTO M294. <br />'-= Tack weld <br />stub min. diameter <br />a <br />per calculations <br />aY <br />6' MIN. <br />i 6" min. <br />r --- --- <br />12" MIN. 12" MIN. <br />18" min. �' <br />Concrete base <br />l% iTllL l/ Ui l j/ 0 <br />12" MIN. o <br />7 <br />Alternatively, metal <br />stakes and wire may be <br />2x riser dia. min. <br />used to prevent flotation <br />NATIVE SOIL OR <br />COMPACTED BACK FILL y <br />%� 2" TO 4 ROCK <br />TO 1Yz" WASHED GRAVEL <br />7 <br />m <br />GE07EX71LE <br />LIJ <br />a <br />OUTLET <br />m <br />MOM <br />DEPARTMENT OF <br />ECOLOGY <br />State of Washington <br />NOT TO SCALE <br />Sediment Pond Riser Detail <br />Revised June 2016 <br />Please see httpYAvww.ecy.wa.gov/copyrighthtml for copyright notice including permissions, <br />limitation of liability, and disclaimer. <br />2019 Stormwater Management Manual for Western Washington <br />Volume 11- Chapter 3 - Page 394 <br />k TEMPORARY EROSION CONTROL IS DESIGNED TO MEET FLOW CONTROL UTILIZING A SEDIMENT <br />TRAP, WHICH DOES NOT REQUIRE A RISER. ULTIMATELY, THE SEDIMENT AND FLOW CONTROL <br />WILL BE MITIGATED BY THE PROPOSED PERMANENT DETEN71ON VAULT. SIZING FOR <br />DEWATERING ORIFICE, PRINCIPAL SPILLWAY, EMERGENCY SPILLWAY, AND MINIMUM SEDIMENT <br />FLOW CONTROL SIZING ARE PROVIDED ON THIS SHT. THEY ARE PROVIDED FOR THE FINAL <br />CONFIGURATION USING THE PERMANENT STORMWATER SYSTEM AND FOR THE TEMPORARY TRAP <br />IF A RISER IS REQUIRED DURING CONSTRUCTION DUE TO FIELD CONDITIONS. <br />CONTRACTOR/CESCL ARE RESPONSIBLE FOR DETERMINING APPROPRIATE EROSION CONTROL <br />BMPS MODIFICATION AS NEED TO MEET ECOLOGY NPDES PERMIT REQUIREMENT.. <br />STABILIZE EXPOSED SIDE <br />SLOPES WITH VEGETATION <br />OR EQUIVALENT MEASURES <br />12" MIN. OVERFLOW <br />DEPTH (TIP.) <br />u � TOP OF BERM <br />. / QUARRY SPALL PROTEC71ON <br />AT OVERFLOW <br />12" MIN. L 12" MIN. <br />2" TO 4" ROCK <br />-%n TO 1Yz" WASHED GRAVEL <br />NON WOVEN <br />FILTER FABRIC <br />DISCHARGE TO STABILIZED <br />CONVEYANCE PATH OR <br />APPROVED OUTLET PIPE— <br />SECT/ON <br />TEMPORARY SEDIMENT TRAP <br />NOT TO SCALE <br />SEDIMENT TRAP SUMMARY TABLE <br />MINIMUM WATER <br />FACILITY NO. <br />IMPERVIOUS (AC.) <br />PERVIOUS (AC.) <br />TOTAL (AC.) <br />DESIGN Qs (CFS)a <br />SURFACE AREA <br />W,S. ELEV. (FT.) <br />BOT. ELEV. (FT.) <br />(SF) <br />SED. TRAP <br />(NORTH) <br />0.70 <br />0.26 <br />0.96 <br />0.315 <br />656 <br />SEE PLAN <br />SEE PLAN <br />SED. TRAP <br />(SOUTH) <br />0.15 <br />0.08 <br />0.23 <br />0.070 <br />146 <br />SEE PLAN <br />SEE PLAN <br />sQ2 FLOW RATE ARE THE 2-YEAR, 24-HOUR PEAK FLOWS DETERMINED BY USING WWHM 2012 MODELING. <br />**THE DETEN71ON VAULT SHALL BE USED AFTER IT IS CONSTRUCTED AND THE STRUCTURAL ELEMENTS HAVE BEEN INSPECTED AND APPROVED FOR OPERATION. ONCE <br />OPERATIONAL, BOTH SEDIMENT TRAPS CAN BE REMOVED. <br />SHEET FOR INFORMATION ONLY. SEE <br />CITY OF EVERETT PERMIT PW2211-012 <br />FOR APPROVED SWICPP, TESC PLANS <br />AND DETAILS AND STRUCTURAL PLANS. <br />Copyright ® 2024 CPH Consultants, LLC. All Rights Rmr <br />CLIENT <br />W <br />0 <br />z <br />0 <br />H <br />z <br />z_ <br />x <br />3 <br />zz <br />0 <br />0 <br />U <br />x <br />_U <br />2 <br />O <br />x <br />O <br />z <br />N <br />PACIFIC RIDGE HOMES <br />17921 BOTHELL-EVERETT HWY <br />SUITE 100 <br />BOTHELL, WA 98012 <br />PHONE: (425)438-8444 <br />C P H <br />CONSULTANTS <br />Site Planning Civil Engineering <br />Landscape Architecture - Land Use Consulting <br />11321-B NE 1201h Street <br />ri kland, WA 98034 - )425) 285-2390 <br />101 South Wenatchee Avenue, Suite C3 <br />Wenatchee, WA 98801 - (509) 293-7731 <br />www.cphconsultants.com <br />PROJECT NO. <br />0132-21-026 <br />DRAWING <br />C1.101 <br />SHEET 6 OF 30 <br />