2018-07-02_PERMIT FILE - C2010089A ‎(3)‎

• Permit No: C2010089A
• IBM Index Class Name: Permit File
• Doc Date: 7/2/2018
• Doc Name: Pond NHN-002 & Ditch Design
• Section_Exhibit Name: Map 2.05.3‎(4)‎-9
• Media Type: M
• Archive: Yes

New Horizon North Mine Stage Storage Curve C-2010-089
Pond NHN-002
5688 TOP OF STRUCTURE(5688.00)
5687
5686 �EMERGENCY SPILLWAY 568 .00)
■
5685
0 5684 PRINCI AL SPILLWAY 5684. / TI
EMERGENCY SPILLWAY INLET
5683 PIPE 18"DIA CMP,>300 FT LONG PLASTIC LINER AT SPILL IPE 4'
tU 1%GRADE CUTLET WITH 2-12"ROu GED '..
W 5682 A INLET AT 5680.75' TO DISPERSE DISCHARGE WATER. -
10-YR P EPX STAGE(5682.03) .
PRIMARY SPILLWAY INLET PIPE .G NHN-On2 North Ditch
5681 �.
WEEPHOLE(5680. 5) 1$"DIA CMP,>300 FT LONG .`� � ; ,..._ ., -. '-.,,,r� �•` `,
1%GRADE
5680r�ry
INLET AT 5680.75' S + g a
5679 RISER INLET AT 5684' �, ,C...C11 �o
_ r 6
SEDIMENT I.EVEL(5678.72) S+gZ SWS2-C
5678 GLORY HOLE � ..'
JUNCTION BOX FOR
6.3 ACRES
5677 EMERGENCY SPILLWAY +LZ
0.0 5.0 10.0 15.0 20.0 25.0 +8Z
Accumulative Storage(Acre-Ft)
TOP OF EMBANKMENT:5688' 9+8Z
EMERGENCY SPILLWAY:5686' - ?
TRAPEZOIDAL CHANNEL +6Z _,._,_.
r`
Storage volume computations
10FT BOTTOM,2H:1 V SIDES
New Horizon North Mine +
Pond NHN-002 POND BOTTOM AT 5677' 0)
Plastic liner down pond slope from
ditch entrance.
ELEV. Width LENGTH AREA AVG. INTERVAL STORAGE ACC. STAGE
(ft) (ft) (ft) (ac) AREA (ft) (ac-ft) STORAGE INTERVAL
(ac) (ac-ft) (ft)
5677.00 N/A N/A 0.000 -
5678.00 NIA N/A 1.616 0.808 1.00 0.538 0.538 1.00
5679.00 N/A N/A 1.731 1.674 1.00 1.673 2.211 2.00
5680.00 N/A N/A 1.847
1.789 1.00 1.789 4.000 3.00
5681.00 N/A N/A 1.966 1.907 1.00 1.907 5.907 4.00
5682.00 N/A N/A 2.086 2.026 1.00 2.025 7.932 5.00 7
2.147 1.00 2.147 10.079 6.00 ditchPlas a liner down pond slope from
5683.00 NIA N/A 2.208 yt7x ditch entrance.
5684.00 NIA NIA 2.331 2.270 1.00 2.269 12.348 7.00
5685.00 N/A N/A 2.456
2.394 1.00 2.393 14.741 8.00 10+00
5686.00 NIA NIA 2.583 2.520 1.00 2.519 17.260 9.00 +50
5687.00 NIA N/A 2.711 2.647 1.00 2.647 19.907 10.00
5688.00 NIA N/A 2.841 2.776 1.00 2.775 22.682 11.00 +00
+50 SWS2-B
43.6 ACRES
7+50South Ditch
0P7+75 to 11+00
Acres
NHN-002 North Ditch
s� \
r 5+50
5730 "
5730 0 s+00
.�., +50
5710 C/) 4+0o
5710 cv
CD 3+50
1-4% a 3+
5690 ao
5690 Z 2+50 South Ditch 0+00 to 7+75 SWS2-A
2+00 8.7 Acres 10.3 ACRES
5670
5670 1+5q
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 '+ POND NHN-002 DPRA INAGE
+ 0+ + 0+ + C + +' ' 0+ + C) L 0 + CD + C5 + 0 + a+
0 N N M co It d• Un LO W W ti N. Co 00 M c) 0 0 60.2 ACRES
N N N N N N N N N N N N N N N N N N N M M
NHN-002 South Ditch
5730 5730
1-5
5710
5710
5690 5690
_100%
5670 5670
0 0 0 0 0 0 0 0 0 0 c:> 0 0 0 0 0 0 0 0 0 0 0 0
o LO 0LID 0U") 0 LO 0 LO 0 ua o u) 0 LID 0 LO 0LID 0 LO c)
0 0 N N M M "'Cr d- LO u7 0 W r•. I` ao ao o M 0 0Pond e--
NHNi002
A
5740 A
5730 5740
5720 5730
6710 5720
5700 5710
5690 5700
5680 5690
567 _..__.m._ w ,,,....., ...,.A._. _...,_ k v._ _, .. , ._... ........ . ....r.n.._ _...,. r.. _ 5680
0
5660 5670
8 8
C14
1 LO 5660+ + O I O p p Q o Q ©©O Q + + + + ! in
LO co
Oo Qo W +
Cfl
B B'
5730 5730 C
5720 5720 C 1
5710 5710 6710 5710
5700 5700 5700
5690 control
ooie valveEmergenty Spillway {Anti-vortex device5686• � 5700
t riser top 5690 6690 elev.) to 72" dio. drop inlet 56905680 v..
6" d' ser bottom. Controlled
V valve Typx;olly left open a 0 rq. 5680 56$0 t 5" d
. ,.... 5680
5670
�8'_' rincipal Spillwoy Pipe turning north to discarge near Meehan draw 5670 5670 Em. spillway outlet pipe north 5670
5650 5660 5660 to discharge near Meehan Draw 5660
5650 5650 S 5 S 5? g � 0 a
o + o + era r}a a N co
o a cv N +
co
Table 2.05.3(4)-9-2 NHN-002 Ditch Design Parameters
Bitch Station Cumulative Slope Minimum Side Rip
Flow(efs) (°o} Bottom Slope Rap Dsq
Width(ft) (HA (in)
NI-IN-002 South 0+00 to 7+75 6.64 1-5 12.0 2.0 N/A
7+75 to 11+00 7.68 6-10 12.0 2.0 1.5
NEN-002 North 20+80 to 30+30 4.92 1-4 12.0 2.0 N/A Principal Spillway Pipe
X'
5700 X Pipe daylights, 5700
1.0 ft.freeboard
5690 Pond NHN-002 remainder on surface 5690
_�____.
F 5680 Baseline topographyMeehan Draw
5680
5670 12+ 18"dia. CMP 5670
(- See table 5660 566D
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 N 0 CD 0 0 0 0 00 0 0 0 0 0 0
o T- N M "t 0 W P.- co C7} 0 �- N M d• LO CO h- 00 C» O r-
+ t . + + t + t + f t . + + + + . + + . . + + + + . + t + + + . .CN + 'Cr +
1.D ft. '© © o o O O O O Q o e- e- r- T- r r r-- r r t-- N N N N N N N N N N M M M M M M
Ditch will be built to a bottom width of at least 12 ft and a total depth of at least 2.0 ft; Sideslopes must
be no steeper than 2H:1 V. Channel bottom width and lining based on Table 2.05..3 4 -9-2 above. Emergency SpPipe
Y Y'
5700
Pond NHN-002 Emergency Spillway Channel Dimensions 5700 Pipe daylights,
5690 Pond NHN-002 remainder on surface 5690
.. ,,,w Baseline topography Meehan Draw
5680 .�._�...�
1
1.0 ft. freeboard 5680
5670 18"dlia. CMP 5670
2 2 566D
660
10.00 ft. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 O o 0 0 0 0 0 0 0 0 0 0 C) O o 0 0 0 0 0 5
O e- N CO %T LO W r- co 0,) 0 - N M d tt} W IZ. co C) O _ N M It Lo (D r_ 00 O 0 _ N M e� Lo CD f`+ Oo O
O O O O O 0 CD O O O
Trapezoidal Channel 1.0 ft. maximum flow depth
Equal Side Slopes P
Channel Lining: Alluvial silts Collodial TR"1 oVed 712►18
., . Appr
Legend
POND NHN-002 &
Permit Boundary
®v ��,kk%GD1n1%"U0"%'H D-ESIGNS
Subwatershed Boundary N
TR-16 SCALE. AS SHOUyN
Pre-Mining Togo Approved 7/2/18 DATE: Q8120aQ10
DRWG. BY. TSGT
Pond Design Contour APPROVED BY. J. STOREY
� E
ENGINEERS CERTIFICATION DRWG NO.
Postmin,�ng Topo I, Jason S. Storey, hereby certify that �0RIZo�
this map has been reviewed by me and Horizon Mine j
Stream Buffer done (100`) `" pQ4 )-9
a**S ZIC�y is true and correct to the best of my Permit No.C-2©10-ass
••,••....•,.• sI a/
�o� s• STo,�a knowledge and information, relying on P.o Box 628,Nucla,CO.81424
9: information supplied by experts
• A8692 employed by New Horizon Mine and�;' ' that I am a Professional En ineer No. REVISION DATE BY CHK
O .-4k
00 a
licensed in Colorado as required by the
200' 0 2 ' 400' S•••••••• �� provisions of C.R.S. 12-25-101 through PR-01 UPDATED POND NHN-002 WATERSHED 04112116 JSS TT FF
fONAE C.R.S. 12-25-119! IN WITNESS
WHEREOF I have hereunder set my
QfV hand and affixed my seal. TR15 2/REVISED POSTMINING TOPOGRAPHY 0 1
JAS S -
. STOREY AND WATERSHED BOUNDARIES 5117 JSS TT/FF
P , No. 48092
CONTOUR INTERVAL 10 FT. �� - TR_16 REMOVED PORTION OF NORTH DITCH,
POST MINE TOPOGRAPHY DATE REVISED WATERSHED BOUNDARIES 3/27/18 JSS TT/FF