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PLASTIC LINER
<br /> EMERGENCY SPILLWAY INLET SPILLWAY PIPE OUTL
<br /> PIPE 18"DIA CMP, >300 FT LONG WITH 1211+ ROCKS
<br /> 1% GRADE PLACED TO DISPERS
<br /> INLET AT 5680.75' DISCHARGE WATER. -
<br /> PRIMARY SPILLWAY INLET PIPE I NHN-OO ' North Ditch
<br /> 18"DIA CMP, >300 FT LONG
<br /> 1% GRADE 100 ft stream buffer
<br /> 4 ,
<br /> INLET AT 5680.75' US" `� CV CV N �,VT � t
<br /> RISER INLET AT 5684 B B N
<br /> 9+9Z
<br /> GLORY HOLE
<br /> JUNCTION BOX FOR C --EMERGENCY SPILLWAY = SW2-C
<br /> 9+LZ -
<br /> 26.6 ACRES
<br /> 0+8Z --- ---
<br /> TOP OF EMBANKMENT: 5688' 9+8Z /
<br /> EMERGENCY SPILLWAY: 5686 i 0+6Z Subwatershed for
<br /> TRAPEZOIDAL CHANNEL
<br /> 10FT BOTTOM, 2H:1V SIDES 9+0LO
<br /> POND BOTTOM AT 5677' Plastic liner down pond slope from j
<br /> N
<br /> ditch entrance.
<br /> Subwaters for
<br /> 0+ 0 9+00
<br /> POND NHNriiiiiiO02 DRA [NAGE
<br /> 85 . 9 ACRES
<br /> Plasti 'ner down pond slope from
<br /> -h en t nce.
<br /> A'
<br /> +
<br /> Subwaters fo
<br /> 7+7 1 +00
<br /> SW2- B New Horizon North Mine Stage Storage Curve C-2010-089
<br /> Pond NHN-002
<br /> 44. 1 ACRES
<br /> "F•+ // 5688 TOP OF STRUCTURE(5688.00)
<br /> Q
<br /> 5687
<br /> r 25-YR PEAK TAGE(5686-35)
<br /> i�� 5686
<br /> EMEl GEN SPILLWAY(5686.00)
<br /> O 5685
<br /> 5684
<br /> 0 PRINCIPi L SPILLWAY(5 84.00)
<br /> CV �/ > 5683 10.YR K STAGE(5683.02)
<br /> 0 v N
<br /> O
<br /> � �\ w 5682
<br /> z Subwatershed for S
<br /> 5681w //,
<br /> _ /` 5680WEEPHOLE(566070+00 to 7+75 W2
<br /> i 15.2 ACRES _ ___ 5679 SEDIM LEVEL(56 8.38)
<br /> 5678
<br /> 5677
<br /> 0.0 5.0 10.0 15.0 20.0 25.0
<br /> 9*1 Accumulative Storage (Acre-Ft)
<br /> Storage volume computations
<br /> New Horizon North Mine
<br /> Pond NHN-002
<br /> ELEV. Width LENGTH AREA AVG. INTERVAL STORAGE ACC. STAGE
<br /> -.-® (it) (it) (ac) AREA (it) (ao-ft) STORAGE INTERVAL
<br /> (ac) (ao-ft) (ft)
<br /> 5677.00 N/A N/A 0.0000
<br /> 5678.00 WA WA 1.6156 0.8078 1.00 0.8078 0.8078 1.00
<br /> - 5679.00 WA WA 1.7307 1.6731 1.00 1.6732 2.4809 2.00
<br /> 5680.00 WA WA 1.8475 1.7891 1.00 1.7891 4.2700 3.00
<br /> - 5680.61 WA WA 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 N/A 2.0860 2.0259 1.00 2.0260 8.2027 5.00
<br /> 5683.00 WA N/A 2.2077 2.1468 1.00 2.1469 10.3495 6.00
<br /> 5684.00 WA WA 2.3310 22693 1.00 2.2694 12.6189 7.00
<br /> 5685.00 WA WA 2A560 2.3935 1.00 2.3935 15.0124 8.00
<br /> 5686.00 N/A WA 2.5826 2.5193 1.00 2.5193 17.5317 9.00
<br /> 5687.00 WA WA 2.7108 2.6467 1.0o 2.6467 20.1784 10.00
<br /> 5688.00 WA NIA 2.8407 2.7757 1.00 2.7758 22.9542 11.00
<br /> Table 2.05.3(4)-8-2 NHN-002 North Ditch
<br /> NHN-002 Ditch Design Parameters
<br /> Cumulative Minimum
<br /> 5770 5770
<br /> Stations Flow, Q Slope, % Bottom Width Side Slope, HAV Rip Rap, D50, in
<br /> NHN-002 South 0+00 to 7+75 12.27 1-5 12.0 2.0 N/A
<br /> 7+75 to 11+00 14.73 6-10 12.0 2.0 3.0 5750 5°/v- 5750
<br /> NHN-002 North 0+00 to 9+00 11.85 1-5 12.0 12.0 N/A
<br /> 9+00 to 30+30 26.89 1-4 112.0 12.0 1 N/A
<br /> 5730 5730
<br /> 5710 5710
<br /> 5690 -4°/
<br /> 1 � � 5690
<br /> 1.0 ft.freeboard {"
<br /> 5670
<br /> 5670
<br /> + 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 O O o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
<br /> �-See table-"{ o to 0 to 0 to 0 to 0 to 0 to o to o to 0 to 0 to 0 to 0 to O to Co to o to o Lit 0 to 0 to O to o to 0 to o to 0 to 0 to o to 0 to 0 to 0 tr) 0 to 0 to 0 to
<br /> + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
<br /> O O r- �- N N M Cl) er d' to to (O (p I.- 1� 00 M O 6) O CD N N M M V' � to to (D CO n 1 00 CO O) O O O r N N CO CO 'q v to to (O (O I- h- 00 CO M O O 0
<br /> 1.0 ft. r r � I � (V N N N N N N N N N N N N N N N N N N N (M M
<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:lV. 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 I
<br /> L ---1 5°/
<br /> 1.0 ft. freeboard °
<br /> 5710 5710
<br /> 2 2 10.00 ft. -{
<br /> 5690 � 5690
<br /> -10
<br /> Trapezoidal Channel 1.0 ft. maximum flow depth
<br /> Equal Side Slopes 5670 5670
<br /> Channel Lining: Alluvial silts collodial o O o O o a 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
<br /> o to 0 to o to 0 to 0 to O to 0 to 0 to o to 0 to 0 to O
<br /> N CO) eM 'R '1' to tr) (O (O 1 1 00 00 6) O O O
<br /> Pond NHN -002
<br /> A A' Principal Spillway Pipe X
<br /> 5740 5740 5700 Pipe daylights, ,5700
<br /> 5730 5730 remainder on surface
<br /> 5720 5720 5690 Pond NHN-002 5690
<br /> 5710 5710 5680 __�Baseline topography Meehan Draw _ 5680
<br /> 5700 5700 5670 18"dia. CMP 5670
<br /> 5690 5690 5660 5660
<br /> 5680 " ^..,.. 5680 o O N M � M O M N O N M y FOCI (00D �O o00 60i O O! N M dT u07 (0D N 000 M O , N M v if)
<br /> ...,.,R.,.,._r.. m... �.._-...=..s....._ m..,_-m- .... ®. ..... ._... ..,.me......,. ,.�t., a.....m..v.-..,.. e.,,..,F.,.��...�. ,.m.-,,.....-�am..n.,_-...,.s..m.�.. - „_. .. .m...�m..mR...................... ... ..._,_,...A.,�,..._....,�.._,.:., ........»..:_.ma.,_.....,�m,._m,...,-._.m.�..�s..,.....em.F.»m._»...,a"` p
<br /> 5670 5670 O O O O O O O O O O .+- + + + + ` ` N N N N N N N N N N M (+O (+7 M
<br /> 5660 5660
<br /> g Emergency Spillway Pipe
<br /> Y Y.
<br /> B B' 5700 Pipe daylights, 5700
<br /> 5730
<br /> 5730 5690 remainder on surface 5690
<br /> ('`t Pond NHN-002
<br /> 5720 5720 C v 5680 Baseline topography Meehan Draw _ 5680
<br /> 5710 5710 5710 5710
<br /> 5670 18"dia. CMP 5670
<br /> 5700 5700 5700 Emergency Spillway (5686' 5700
<br /> Wesphole valve Anti-vortex device elev.) W 72" dia. drop inlet ,... -�� 5690 5660 5660
<br /> 5690 control• riser top „,,.."" 5690 5690 _ 0 0 0 0 0 0 0 0 0 0 0 o N M 0 u0i (00 C) m 0 o Ck N M y u0i (0D C) eo° 0 o 0 N M v a m 0 0 0
<br /> 6• d' ser bottom. Controlled 'Rr5680 w_,r�- �.• 5680 5680 �, ..,� 5680 o r N r1 v u1 0 00 rn o
<br /> �( valve Typically left open of o. ,JS� .. _�ap6-- ,m- F + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
<br /> 5670 ®® 18" Principal Spillway Pi turning north W disco a near Meehan draw 5670 5670 5670 O O O O O O O O O O .- �- .- .- N N N N N N N N N N CO M M c') ('0 (h ('D r�7 CO c�J
<br /> Pa W % Pe 9 r9 Em. spillway outlet pipe north
<br /> 5660 5660 5660 to discharge near Meehan Draw 5660
<br /> 5650 5650
<br /> O O S S O N O O O O + N N m
<br /> 9 � L4P 14
<br /> Legend
<br /> POND NHN-002 & PRA
<br /> Permit Boundary Approved
<br /> DITCH DESIGNS 10128/16
<br /> Pond Design Watershed Areas N
<br /> �puwuep�
<br /> of ENGINEERS CERTIFICATION
<br /> `j F��� Y. Y certify SCALE: AS SHOWN
<br /> Subwatersheds �� P � �� 1,Jason S. Store hereby certi that this s`
<br /> �� s. S•'•.�(P has been reviewed by me and is true and " DATE: OS120/2010
<br /> Pre-Mining Topo /' g :Q �F: o =_ y g
<br /> o °48092° e correct to the best f m knowledge�d oftDRWG. BY. TSGT
<br /> information, rem on information supplied
<br /> v r by experts employed by New Horizons Mine APPROVED BY: J. STOREY
<br /> Pond Contour E
<br /> o % :(v("v and that I am a Professional Engineer licensed
<br /> ,.
<br /> F �, DRWG NO.in Colorado as required by the provisions of h oRlZot�
<br /> iris. SIONA ��G O� C.R.S. 12-25-101 through C.R.S. 12-25-119_ /�
<br /> PMT Contour �/ s , IN WITNESS WHEREOF have hereunder set New Horizon Mine Map 2. 05. 3l A l -aJ�]
<br /> my hand and affixed my seal. Permit No.C-2010-039
<br /> 100 Ft. Stream Buffer ASON S. STOREY P.o Box 628,Nucla,CO.81424
<br /> P.E. o. 4 092
<br /> S o�
<br /> DATE No. REVISION DATE BY CHK
<br /> 100 0 100 200, PR-01 UPDATED POND NHN-002 WATERSHED 04112116 TSGT TT
<br /> CONTOUR INTERVAL 10 FT.
<br /> POST MINE TOPOGRAPHY
<br />
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