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i
<br /> PLASTIC LINER AT
<br /> EMERGENCY SPILLWAY INLET
<br /> SPILLWAY PIPE OUTL
<br /> PIPE 18"DIA CMP, >300 FT LONG WITH 12"+ ROCKS ,
<br /> 1 % GRADE PLACED TO DISPERSt
<br /> INLET AT 5680.75' DISCHARGE WATER. -
<br /> PRIMARY SPILLWAY INLET PIPE NHN-002 North Ditch
<br /> 18"DIA CMP, >300 FT LONG 0 0 `
<br /> o I x + o o o o �, - 100 ft stream buffer o n o
<br /> 1 /o GRADE Os00
<br /> xC-CV N M LO o 'or' o+ +o LID +0 6' ;� o to o 0 0 0 0 0 0 0 0 0 `r' o0 o"tg xQ
<br /> INLET AT 5680.75 S� cv M N + N N N ,+ o ,o 0 0 0 ►n o+ + + �+ o to + + * O Ap
<br /> h o
<br /> N N N ^t .- � + + L + + d M ch + + o x� x x�
<br /> N <- O tl N co + d "S; "
<br /> B e-- N QJ
<br /> RISER INLET AT 5684 B �-
<br /> e - CU 1f) r Q 0O XQ
<br /> 9+9Z ,r Qx� >.
<br /> GLORY HOLE C11 `n 00 �xQ
<br /> JUNCTION BOX FOR -
<br /> EMERGENCY SPILLWAY SW2-C` �
<br /> +Lz North Ditch 24.5 ACRES 2'`0°
<br /> 9+00 to 30+30 '
<br /> 0+8Z 15.3 Acres xy`3
<br /> 1
<br /> 05 Z
<br /> TOP OF EMBANKMENT: 5688'
<br /> EMERGENCY SPILLWAY: 5686' I +6Z
<br /> TRAPEZOIDAL CHANNEL
<br /> North Ditch
<br /> 10FT BOTTOM, 2H:1V SIDES Io
<br /> 0+00 to 9+00
<br /> ND BOTTOM AT 5677' Plastic liner down pond slope from 9.2 Acres
<br /> PO ditch entrance.
<br /> v
<br /> I
<br /> i SW2-B
<br /> Plastic liner down pond slope from 44.2 ACRES
<br /> 10* d' ditch entrance.
<br /> 10+00
<br /> a
<br /> 9+50
<br /> 9+00
<br /> 8+50
<br /> `8+00
<br /> 7+50South Ditch
<br /> 1y0°7+75 to 11 +00
<br /> �1 .6 Acres
<br /> �Ys13 New Horizon North Mine Stage Storage Curve C-2010-089
<br /> 6 ` \ Pond NHN-002
<br /> 6X00 O
<br /> 0 5+50 ` 5688 TOP OF STRUCTURE(5688.00)
<br /> r5+aa 0 5687 25-YR PEAK STAG 5686.35
<br /> 5686 EM NCY SPI WAY 56 6.00)
<br /> 4+50 C-Oj 5685
<br /> O5684 PRINC PAL SPILLWAN 5684.
<br /> V j 4+00
<br /> N 5683 10-YR PEAK STAGE 5682.47
<br /> O 3+50 Lu 5682
<br /> 1 5681 WEEPHOLE( 75)
<br /> z 3+00
<br /> 5680
<br /> i 5679 SEDIME T VEL 5 8.89
<br /> Z = .2+50 South Ditch SW2-A
<br /> 5678 _
<br /> 0+00 to 7+75
<br /> '2+0Ci 8.7 Acres 10.3 ACRES 5677 - -
<br /> 0.0 5.0 10.0 15.0 20.0 25.0
<br /> Accumulative Storage (Acre-Ft)
<br /> 1+50 2 DRAINAGE 1+ P4ND NHN -00Storage volume computations
<br /> oa (`/��7� ACRES 7 V w 0 / �C R E S+ New Horizon North Mine -
<br /> Pond NHN-002
<br /> 0+50 ELEV. Width LENGTH AREA AVG. INTERVAL STORAGE ACC. STAGE
<br /> (ft) (it) (ft) (ac) AREA (it) (ac-ft) STORAGE INTERVAL
<br /> (ac) (acft) (ft)
<br /> 5677.00 N/A N/A 0.0000
<br /> 5678.00 N/A NIA 1.6156 0.8078 1.00 0.8078 0.8078 1.00
<br /> 5679D0 NIA N/A 1.7307 1,6731 1.00 1.6732 2A809 2.00
<br /> 5680.00 NIA N/A 1.8475 1.7891 1.00 1.7891 4.2700 3.00
<br /> 5680.61 NIA N/A 1.9197 1.8836 0.61 1.1490 5.4191 3.61
<br /> 5681.00 N/A N/A 1.9659 1.9067 0.39 0.7577 6.1767 4.00
<br /> 5682.00 N/A NIA 2.0860 2.0259 1.00 2.0260 8.2027 5.00
<br /> 5683.00 NIA N/A 2,2077 2.1468 1.00 2.1469 10.3495 6.00
<br /> 5684.00 NIA NIA 2.3310 22693 1.00 2.2694 12.6189 7.00
<br /> 5685.00 NIA NIA 2.4560 2.3935 1.00 2.3935 15.0124 8.00
<br /> 5686.00 NIA NIA 2.5826 2`5193 1.00 2.5193 17.5317 9.00
<br /> 2.6467 1.00 2.6467 20.1784 10.00
<br /> 5687.00 NIA N/A 2.7108
<br /> 5688,00 N/A NIA 2.8407 2.7757 1.00 2.7758 22.9542 11.00
<br /> Table2.05.3(4)-8-2 NHN-002 North Ditch
<br /> NHN-002 Ditch Design Parameters
<br /> 5770
<br /> Cumulative Minimum 5770
<br /> Stations Flow, Q Slope, % Bottom Width Side Slope, HAV Rip Rap, D50, in
<br /> NHN-002 South 0+00 to 7+75 6.64 1-5 12.0 2.0 NIA
<br /> 7+75 to 11+00 7.68 6-10 12.0 2.0 1.5 5750 -5°/ 5750
<br /> 1-5 12.0 2.0 NIA
<br /> + 00 8.53
<br /> NHN-002 North 0 00 to 9+
<br /> 9+00 to 30+30 19.72 1-4 12.0 2.0 N/A 5730
<br /> 5730
<br /> 5710
<br /> 5710 �-------_
<br /> -4°/ 5690
<br /> 5690
<br /> r 1.0 ft.freeboard
<br /> 5670
<br /> 1� 5670
<br /> I- - O� O� r- � r' Or O O O O O O O O O O CD O
<br /> O O O O O O CD OOOOOOO O O O O O O O O O O CD O o O O uO O O O
<br /> Ln u7 O Lt O « O O
<br /> Ln O D O UD O n O LO O LO O tt C�k Ln + + + + + + + + + + + + + + + + . + + + + + + +
<br /> .
<br /> O ll O LC O LID O O tq O to O CD LID 0 LID 0
<br /> + + + + + + O O O
<br /> See table + + + + + + + + + + + + + + + + + + + + + + + + + + + + CO 6OO N N M Cr) �t M 1 N Cr) M
<br /> LID to W CO ti � CO O 0) 0) O o N N M M M to (.0 (0 1-- 1 CO N N NN N N N N N N
<br /> Both ditches will be built to a bottom width of at least 12 ft
<br /> and a total depth of at least 2.0 ft. Sideslopes must be no
<br /> steeper than 2H: 1 V. Channel bottom width and lining based on NHN-002 South Ditch
<br /> Table 2.05.3(4)-8-2 above.
<br /> 5730 5730
<br /> Pond NHN-002 Emergency Spillway Channel Dimensions
<br /> -5%-
<br /> 1.0 ft. freeboard 5710 5710
<br /> 1
<br /> 2 (
<br /> 10.00 ft.- -I 5690 5690
<br /> -10°/Q /
<br /> Trapezoidal Channel 1.0 ft. maximum flow depth \\�`�.
<br /> Equal Side Slopes 5670 5670
<br /> Channel Lining: Alluvial silts collodial 0 0 o CD o 0 CD 0 0 o 00 0 0 0 0 0 0 CD 00 0
<br /> o too . O r. r> o o . too . O In CD (o o to o O to o
<br /> + + + + + + + + + + + + + + + + + + + + + + +
<br /> O O N N M CO d' V' LO In (p CO n t,- CO OD 0) 61 O O
<br /> Pond NHN -002
<br /> A, Principal Spillway Pipe X
<br /> A 5740 5700 X Pipe daylights, 5700
<br /> 5740
<br /> 5730 5690 Pond NHN-002 remainder on surface 5690
<br /> 5730 5720 , -. �.-Baseline topography - 5680
<br /> 5720 5710 5680
<br /> 5710 5700 5670 18"dia. CMP 5670
<br /> - _�- �• - 5660
<br /> 5700 ..�..
<br /> `�"_` 5690 5660
<br /> .,.,,...... .�,.............. ,... ..._: ,., __-.,.._,..x..,.P =_.N._a„ - .......„_. ............ .=.a...<.<..��...,....,. .....,.,.a..�..=.r,.r. _,m _.,__� �..,�.-..-.._.-.u. .- .- N N N N N N N N N N (�7 t+1N1 IM
<br /> + + + + + + + + + + + + + + . . + + + + + + + + + + + + + + + + + J O o
<br /> -.,.. -. O � N ai d' to CO r W O O � � CO V' � CO t` O O O c- N ch d' 1f7 CO t` W O O � �C1
<br /> 5680 0 0 0 0 0 0 0 0 0 0 0 0 0 o O o 0 0 0 0 o O o 0 0 0 0 0 0 0 0 _o
<br /> 5680 .. 5670 0 0 O o 0 0 0 o O o f 1 I1
<br /> 5670
<br /> 5660 O o o O g s + + o Emergency Spillway Pipe
<br /> 0 0 0 0 ,,, o o + + +o m Division n Reclamation,
<br /> + + + + N N + + + N r rn Mining&Safety
<br /> Y Y
<br /> 5700 Pipe daylights, 5700
<br /> B, remainder on surface
<br /> B 5690 Pond NHN-002 Meehan Draw 5690
<br /> 5730 5730 � r+r •� .,: _.. Baseline topography - 5680
<br /> l� 5680 - x . n,m .
<br /> 5720 5720 5670
<br /> 5710 5710 5710 5710 5670 18 dia. CMP 5660
<br /> 5700 5700 6700
<br /> 5700 Emergency " diaay roin' "..N .,..a.�= -� 5660
<br /> Weephole valve Anti-vortex _° " elev.) to 72" dia. dropinlet =^°^HI - -" 5690
<br /> Anti-vortex device s .�=-M.�"-`__�' 5690 5690 ) -` 00 O O O O O O O O O O O O o O o O O O o O o O o O O O O o O O O O O O O O O O
<br /> 5690 control at riser top ��'_ w�.0
<br /> fi" d' am'nser bottom Controlled - 5680 �- N co V t4 n W Ql O �- N M V' O n 00 W O N M V tO n a7 O) O r N M C b CO N a°
<br /> 5680 y valve. Typically left open at 0.5" dip.` 5680 6680 - - - O O O O o O O o O O •- r " N N N N N N N N N N M C7 M co M M M M M M
<br /> 5670
<br /> 5670 8" Principal Spillway Pipe turning north to discorge near Meehan draw 5670 6670 Em. spillway outlet pipe north
<br /> 5660 5660 5660 to discharge near Meehan Draw o 0 0 5660
<br /> 0
<br /> 5650 5650 0 Lo o + N N +
<br /> 0 o a
<br /> Legend POND NHN-002 &
<br /> Permit Boundary DITCH DESIGNS
<br /> N
<br /> Subwatersheds
<br /> ENGINEER'S CERTIFICATION SCALE: AS SHOWN
<br /> Oq P�o LICE�S I, Jason S. Storey, hereby certify that this map has been DATE: 0812012010
<br /> Pre-Mining TOpO VOA O� S. 8Tp,FO reviewed by me and is true and correct to the best of my DRWG BY. TSGT
<br /> g 9�; knowledge and information, relying on information
<br /> Pond Contour _ 48�92 supplied by experts employed by New Horizon Mine and w APPROVED BY, J. STOREY
<br /> that I am a Professional Engineer licensed in Colorado =
<br /> W E 09 w� as required by the provisions of G.R.S. 12-25-101 �"'ORIZo�� DRWG NO.
<br /> PMT Contour ONAli_ hereunder set my hand and affixed my seal.
<br /> �� through C.R.S. 12-25-119. IN WITNESS WHEREOF I have
<br /> / Map 2. 05. 3(4)-9
<br /> New Horizon Mine
<br /> N
<br /> Permit No.. C-2-2010.089
<br /> 100 Ft. Stream Buffer
<br /> P.O Box 628,Nucla,CO.87424
<br /> SON S. STOR
<br /> P.E. o.4 092
<br /> 6Z ZY 2 i? _ No. REVISION DATE BY CHK
<br /> S -DATE
<br /> PR-01 UPDATED POND NHN-002 WATERSHED 04112116 TSGT TT
<br /> 100' 0 100' zoo'
<br /> TR-15 REVISED POSTMINING TOPOGRAPHY 2115116 TSG7 TT
<br /> AND WATERSHED BOUNDARIES
<br /> -15
<br /> CONTOUR INTERVAL 10 FT p Appproves - sitaiaol�
<br /> POST MINE TOPOGRAPHY Approved
<br />
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