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0 <br />6455 <br />6450 <br />C <br />r <br />u <br />r <br />r rr <br />. <br />. . . <br />. . . . <br />. . . . <br />. . . . <br />. . . . <br />. . . . <br />. . . . <br />. . . . <br />. . . . <br />ao <br />UNDISTURBED. <br />N <br />z HISTORIC RUNOFF <br />• SEUNOTE 1 <br />RUNOFF FROM <br />6450 ONSITE BASINS <br />00 <br />EXCAVATE <br />° <br />...$ <br />V► <br />vim <br />fH <br />6"5 <br />PROPOSED RETENTION BERM <br />... <br />... <br />°.. <br />+ <br />O <br />^W. <br />�o <br />n�Q <br />a <br />n <br />^ <br />q o <br />o <br />NW. <br />�. <br />a <br />.... <br />.. <br />.. ... <br />.... <br />.... <br />.... <br />a� <br />> <br />+ <br />ng' <br />y <br />.. <br />. . . . <br />a <br />. . . . <br />.. <br />Na <br />N <br /><'. <br />. <br />. <br />.... <br />.... <br />_;_ __:_ <br />.. <br />. . <br />. . . . <br />. . . . <br />36 O <br />.... <br />.... <br />.... <br />.... <br />.... <br />.... <br />.... <br />.... <br />q <br />.... <br />......... <br />­_­­**l"­ <br />.... <br />.... <br />.... <br />.... <br />.... <br />... <br />.... <br />.... <br />.............. <br />.... <br />.... <br />.... <br />.... <br />.... <br />.... <br />6470 <br />to <br />rm <br />1.1 <br />6450 <br />0+00 <br />20 40 60 80 100 <br />SECTION 20 -1 <br />OFFSITE BASIN 20 <br />.... <br />......... <br />MATERIAL FROM RETENTION POND <br />.... <br />.... <br />.... <br />MATERIAL FROM THIS SIDE <br />(UPSTREAM SIDE) OF BERM <br />— <br />LOCATION. <br />UNDISTURBED. <br />z HISTORIC RUNOFF <br />• SEUNOTE 1 <br />RUNOFF FROM <br />6450 ONSITE BASINS <br />00 <br />EXCAVATE <br />H <br />�Gjj <br />V► <br />vim <br />fH <br />6"5 <br />PROPOSED RETENTION BERM <br />SECTION B -B <br />.... <br />.. <br />.. ... <br />.... <br />.... <br />.... <br />20 40 <br />SECTION 30 -1 <br />ONSITE BASIN 30 <br />SCALE: HORIZONTAL: 1'20' <br />VERTICAL: 1"=W <br />Ono — 8.56 CFS <br />W.S. - 6444.36 O N =0.045 <br />V — 4.91 FPS O N =0.035 <br />UPSTREAM SLOPE <br />6470 S - 0.0500 (5.007) <br />INSTALL BERM USING EXCAVATED <br />1' <br />MATERIAL FROM RETENTION POND <br />6455 INSTALLATION, OR EXCAVATE <br />MATERIAL FROM THIS SIDE <br />(UPSTREAM SIDE) OF BERM <br />— <br />LOCATION. <br />UNDISTURBED. <br />z HISTORIC RUNOFF <br />• SEUNOTE 1 <br />RUNOFF FROM <br />6450 ONSITE BASINS <br />00 <br />EXCAVATE <br />\ FOR BERM <br />\ MATERIAL / <br />10' <br />6"5 <br />PROPOSED RETENTION BERM <br />SECTION B -B <br />6440 <br />120 <br />NTS <br />RUNOFF FROM <br />ONSITE BASIN 10 6' <br />EXISTING ACCESS ROAD (NO REGRADING REQ'D.) <br />LONGITUDINAL SLOPE OF <br />DITCH TO MATCH EXISTING <br />ROAD GRADE: (VARIES) <br />S = 5.0% (MIN.) <br />S = 12.0% (MAX.) <br />* NOTE 1: MATERIAL SHALL NOT CONTAIN <br />6460 ROCKS LARGER THAN 6-(IN ANY DIMENSION) <br />OR INAPPROPRIATE DEBRIS (ORGANIC OR <br />DELETERIOUS MATERIAL LARGER THAN 1". <br />COMPACT TO MAXIMUM VISIBLE DENSITY BY <br />WHEEL ROLLING IN 6" LIFTS (MAXIMUM). <br />6455 <br />6450 <br />60 <br />Qm = 3.90 CFS <br />W.S. — 6453.76 O N =0.045 <br />V = 2.48 FPS O N =0.038 <br />UPSTREAM SLOPE <br />S = 0.0330 (3.307) <br />RETENTION <br />POND <br />INSTALL: <br />- > <br />PROPOSED DIVERSION DITCH <br />0 COL ECT /DIVERT OFFSITE <br />BASIN 10 RUNOFF 't , <br />PROPOSED ROAD DITCH' <br />SECTION C -C 3, <br />NTS <br />IMPOUNDMENT k / <br />FURANWUFNT <br />BASKET STRAINER <br />8" HIGH (MIN. <br />1/4" OPENINGS (. *SEE NOTE 1 <br />12" M AX M <br />4" PVC S,., = 1 /4" PER FOOT <br />4" THREADED CAP 4" TEE <br />(REMOVE TO ALLOW DAYLIGHT TO DRAIN <br />PIPE CLEANING) 4" POND DRAIN <br />NTS <br />REVISION ® RLC DATE 3/25/2013 , g„ �n.0 w1E 8/31/2012 2350 G Road DRAINAGE CHANNEL CROSS - SECTIONS & DETAILS <br />,„ ® � 081E 5/26/20123 ,m B„ vuo DATE 8/31/2D12 Q Connor Imes n group Inc Grand Junction, Co. 81505 DRAINAGE DESIGN PLAN <br />„® DATE 6/13/2013 gY � M 8/3,/2012 1 x(970) 241 -78525 COTTER CORPORATION MINE LP -21 -IEE 3 or 7 <br />