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ILOCK <br />• <br />• <br />• <br />STABILIZE EXPOSED SIDE <br />SLOPES WITH VEGETATION <br />OR EQUIVALENT MEASURES <br />12" MIN. OVERFLOW 4' MIN. TOP OF BERM <br />DEPTH (TIP.) <br />/ QUARRY SPALL PROTECTION <br />W.S. ELEV = SEE TABLE / —I--,AT OVERFLOW <br />- '-12" MIN. L12" MIN. <br />'-` 2" TO 4"ROCK <br />J144" TO 1Yz" WASHED GRAVEL <br />NON -WOVEN <br />FILTER FABRIC <br />DISCHARGE TO STABILIZED <br />CONVEYANCE PATH OR <br />APPROVED OUTLET PIPE — <br />SECTION <br />TYPICAL TEMPORARY SEDIMENT TRAP <br />NOT TO SCALE <br />2' 2' <br />18" MIN. 12"COMPACT <br />DEPTH QUARRY SPALLS <br />ROCK LINED <br />NOTES: <br />1. EARTH OR GRASS LINED DITCHES MAY ONLY BE USED WITH PRIOR APPROVAL OF THE <br />COUNTY INSPECTOR AND WHERE LONGITUDINAL SLOPES OF 67 OR LESS AND A MAXIMUM <br />FLOW VELOCITY OF 5FPS EXISTS. <br />2. <br />ROCK CHECK DAMS SHALL BE USED IN EARTH OR GRASS LINED DITCHES FOR SLOPES <br />GREATER THAN 3% <br />J. <br />ROCK LINED DITCHES SHALL BE USED WHEN SLOPES EXCEED 6% OR FOR FLOW VELOCITY <br />GREATER THAN 5FPS. <br />MAINTENANCE STANDARDS: <br />1. ANY SEDIMENT DEPOSITION OF MORE THAN 0.5 FEET SHALL BE REMOVED SO THAT THE CHANNEL <br />IS RESTORED TO ITS DESIGN CAPACITY. <br />2. IF THE CHANNEL 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 />CONSERVATIVE STANDARD TO BE APPROVED BY SNOHOMISH COUNTY. <br />3. THE CHANNEL SHALL 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 />SEDIMENT TRAP/POND SUMMARY TABLE <br />FACILITY <br />IMPERVIOUS (AC.) <br />PERVIOUS (AC.) <br />TOTAL (AG) <br />DESIGN Q. (CFS) <br />MINIMUM WATER <br />SURFACEAREA(SF) <br />W.S. ELEV. (FT.) <br />DOT. ELEV. (FF.) <br />SED. TRAP #1 <br />1.38 <br />0.39 <br />1.77 <br />1.02 <br />2125 <br />44.0 <br />40.5 <br />SED. POND #2 <br />1.62 <br />0.46 <br />Z07 <br />1.31 <br />2730 <br />46.0 <br />42.5 <br />SED. TRAP #3 <br />1.93 <br />0.66 <br />2.58 <br />1.61 <br />3355 <br />44.0 <br />40.5 <br />NOTES <br />1. SQUARE FOOTAGE REQUIREMENT SHOWN AT WEIR WATER SURFACE ELEVATION. <br />2. TRAP MAY BE FORMED BY BERM OR BY PARTIAL OR COMPLETE EXCAVATION. <br />TYPE 11 QUARRY SPALLS <br />A B <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 />\j\\ 4" MIN. <br />CROSS SECflON ROCK CHECK DAM <br />ROCK CHECK DAM <br />NOT TO SCALE <br />CONT. HIGH VISIBILITY <br />CONSTRUCTION FENCE, <br />TENSAR OR EQUAL <br />CONSTRUCTION FENCE <br />NOT TO SCALE <br />�1_ <br />METAL FENCE POSTS <br />CO.e <br />Know what's below. <br />Cali before you dig. <br />z <br />0 <br />z_ <br />x <br />N <br />a <br />3 <br />z <br />0 <br />VJ <br />x <br />0 <br />z <br />0 <br />0 <br />W <br />N <br />� <br />W <br />Q <br />CL <br />W <br />\ <br />(D <br />J <br />m <br />=L <br />LU <br />C <br />~ w <br />Q_ <br />0 <br />U <br />RIVERVIEW I, LLC <br />10900 NE 8TH STREET <br />SUITE 1200 <br />BELLEVUE, WA 98004 <br />PHONE: (425) 453-9551 <br />cp <br />CONSULTANTS <br />Ste Planning - Civil Engineering <br />Land Use Consulting • Project Management <br />11431Wa Rl NE&bM <br />RWMAWA9 2 <br />F 142512b6239a 1 FAZ(425)2852389 <br />www.cONconsultants.cam <br />PROJECT NO. <br />0024-17-037 <br />DRAWI4G <br />C1.101 <br />SHEET 8 OF 44 <br />