2011-02-28_REVISION - M1980244 ‎(4)‎

• Permit No: M1980244
• IBM Index Class Name: Revision
• Doc Date: 2/28/2011
• Doc Name: Teller County Mining Development Plan Amendment for Mine Life Extension 2 MLE2 Storm Water Plan 5
• From: CC&V
• To: DRMS
• Type & Sequence: AM10
• Media Type: M
• Archive: No

Poverty Gulch Storm Water Management Area
1 Plan View
1 " =500 ft (DSize)
Poverty Gulch Wafer Management Area
including North Cresson Development on West Side
Basin I I Basin Basin I I Basin Basin
NC-El NC -D1 NC -C1 NC -B1 NC -A1
Until 2015
Until
North Cresson /Schist Island Near -term Controls
grading ditches along conveniently located Roads to Convey
Storm Water to existing Depression Areaat Schist Island
Natural Unti12015 Basin
Channel I
15 Basin
PG -B1
Existing Depression
near Schist Island
Poverty Gulch Storm Water Management Area
2
Schematic
8.6AF
75AF
Low
UpperS
to En;Y 9
120A Ac
Grade Ditch
/ ;along Existing Roads
1'_71P -2t and Prep Existing
Depression as
r Temporary EMP -08a
,o _ Wr u ary p S C
z.lh %xE 08-�
u1P fi Z
� to P
85 Z Ac
v � .
X
5 Preparation 2013
Plan View
1" =1000 ft (DSize)
7 � ✓d"i 04
i -eye i r.
98 Ac
Tn utary to EMP 9 ' y,
Construct EMP -2u �
to at least 8.1 AF o
F
for use in 2015
fiSSA
e•., AC Alt
i
Tributary to EMP -8a 1°I
Tdbuta ry to °'������
@ Mme >t0 8a
-
i _' � Thbutarvra __
End of Year 2014
6 Plan View
V =1000 ft (DSize)
Legend
Basin Name
Area PG -X
101 Acre 72 cfs -- 400yr Discharge
MyrDischarge -. alas 10ACreFeet 2xI6yrVolume
E". Channel Name
serrz
% 100 yr Discharge (cfs)
10 -yr Discharge (cfs)
s s w■ E■ m Temporary or Existing Channel
miMimimimim Proposed New Channel
M E 0! 0 1 E I E I E Mining Boundary
End of Year 2015
7 Plan View
End of Year 2016
Plan View
1 " =1000 ft (DSize)
End of Year 2017
9 Plan View
1 " =1000 ft (DSize)
Construct EMP -22
to at Ileast 1.4 AF Capacity
Reconstruct Ponds EMP -09b _
c, and d in Back-fill
�7,101
A South Globe Hill Mime Area !/
to Single Pond with a / l
capacity of 9.5 iAF totai
or 6 7 AF Reconstruction
-
l� �t�86i1!
rrr/1F_MP l'
09
� Td9/ F+'
d 'rte tretat €
Tmbut�ry m !�
- /
8337Acresr` r 4111'�
27MR73° Sl G e ✓:'
Tabulary m ez
�I
�� � Nre Mme � Me
r> r
1 J; EMP -22
t Tributary to - Cil'
EMP -21-
937
r Acres 55% F f
S lope
EMP-08a
10 End of Year 2018
Plan View
1 " =1000 ft (DSize)
Fbd 6" + Hv @ Q -24
Bedding: Mirifi Drain Fabric
or 6" well graded cobble
to sand crushed stone.
Channel Dimensions
SEDCAD
Model &
Channel ID
Basin
10 -Yr
Flow
(cfs)
_y_8__
PG-Dl
Avg.
Slope
(%)
Basin Basin
Flow
Depth
(R)
Basin PG -C7 PG Al
Basin
PG -E1
PG -G1
EMP -019
Spillway
_
10.OAF
�� Unti12015
EMP -022
Secondary Collection Below North Cresson System
1_9 AF
and Permanent Collection and Delivery to EMP -009
Poverty Gulch Storm Water Management Area
2
Schematic
8.6AF
75AF
Low
UpperS
to En;Y 9
120A Ac
Grade Ditch
/ ;along Existing Roads
1'_71P -2t and Prep Existing
Depression as
r Temporary EMP -08a
,o _ Wr u ary p S C
z.lh %xE 08-�
u1P fi Z
� to P
85 Z Ac
v � .
X
5 Preparation 2013
Plan View
1" =1000 ft (DSize)
7 � ✓d"i 04
i -eye i r.
98 Ac
Tn utary to EMP 9 ' y,
Construct EMP -2u �
to at least 8.1 AF o
F
for use in 2015
fiSSA
e•., AC Alt
i
Tributary to EMP -8a 1°I
Tdbuta ry to °'������
@ Mme >t0 8a
-
i _' � Thbutarvra __
End of Year 2014
6 Plan View
V =1000 ft (DSize)
Legend
Basin Name
Area PG -X
101 Acre 72 cfs -- 400yr Discharge
MyrDischarge -. alas 10ACreFeet 2xI6yrVolume
E". Channel Name
serrz
% 100 yr Discharge (cfs)
10 -yr Discharge (cfs)
s s w■ E■ m Temporary or Existing Channel
miMimimimim Proposed New Channel
M E 0! 0 1 E I E I E Mining Boundary
End of Year 2015
7 Plan View
End of Year 2016
Plan View
1 " =1000 ft (DSize)
End of Year 2017
9 Plan View
1 " =1000 ft (DSize)
Construct EMP -22
to at Ileast 1.4 AF Capacity
Reconstruct Ponds EMP -09b _
c, and d in Back-fill
�7,101
A South Globe Hill Mime Area !/
to Single Pond with a / l
capacity of 9.5 iAF totai
or 6 7 AF Reconstruction
-
l� �t�86i1!
rrr/1F_MP l'
09
� Td9/ F+'
d 'rte tretat €
Tmbut�ry m !�
- /
8337Acresr` r 4111'�
27MR73° Sl G e ✓:'
Tabulary m ez
�I
�� � Nre Mme � Me
r> r
1 J; EMP -22
t Tributary to - Cil'
EMP -21-
937
r Acres 55% F f
S lope
EMP-08a
10 End of Year 2018
Plan View
1 " =1000 ft (DSize)
Fbd 6" + Hv @ Q -24
Bedding: Mirifi Drain Fabric
or 6" well graded cobble
to sand crushed stone.
Channel Dimensions
SEDCAD
Model &
Channel ID
3hannel
Name
10 -Yr
Flow
(cfs)
_y_8__
100 -yr
Flow
(cfs)
Avg.
Slope
(%)
Bottom
Width (ft)
Flow
Depth
(R)
Chan,
Depth
(ft)
RipRap
D50(nom)
North Cresson 1
NC-­E
5.1
3.5
0
1.5
2.0
Grass
North Cresson 16
NC -C
4.9
14.6
3.5
0
1.3
2.0
Grass
North Cresson 17
NC -B
14.3
34.0
2.5
0
1.7
2.5
3"
North Cresson 18
NC -A
27.1
56.7
50
60
0.7
3.0
6"
North Cresson 20
NC -D
3.7
8.3
4.6
0
1.5
2.0
Grass
Poverty GI 1
PGA
11.2
23.4
8.1
0
1.3
2.5
6"
Poverty GI
PG -B
14.4
29.0
.7
4.0
112
2
3"
Poverty GI 3
PG -C
9.4
22.5
3.4
0
1.4
2.5
3"
Poverty GI 4
PG -D
17.6
38.2
15.5
4.0
0.8
2.5
3"
Poverty GI 6
PG -E
3.6
8.4
14.4
0
0.8
2.0
3"
Poverty GI 17
PG -F
4.8
10.9
20
0
01.0
2.0
3"
Poverty GI 18
PG -G
8.8
20.1
5
0
0.6
1.8
6"
3
Channel Dimensions
Table
i
i
Future
;�- ! rnbuta y to f
8. ? "7A�es'
4
tbutary to r q
EMP -21
9.3.7ACres "z afreFn
l
11 End of Year 2019 to Mine Life
Plan View
1 " =1000 ft (DSize)
13 Post- Reclamation
Plan View
V=1 ft (DSize)
15' _
F(nom)
Crest Area (Ac)
Sediment Allowance
(2 ft.typ)
�2 ft. (typ)
Spillway
Elevation
3ase Area )
Pond Dimensions
SEDCAD
EMP-
Depth
Area
Area
Capacity
Outlet
E Spillway
Spillway
Model &
Name
Base
Crest
@Crest
Pipe
Width
Elev.
Stricture ID
(ft)
(Ac)
(Ac)
(Ac -Ft)
(in)
(ft)
N. Cresson 1
EMP -8a
15
22
.55
10.5
None
PovertyGII
EMP -09
15
.20
4.5
10.0
None
6,0
Varies
Poverty G12
EMP -21
15
.09
.0.8
10.0
None
6.0
9965.0
Poverty G12
EMP -22
10
.05
0.3
1.6
None
6.0
10029.0
Notes_
1. Pond sizes include 2 ft deep allowance for sediment accumulation.
2. Emergency Spillways are generally 24- inches below crest.
4 EMP- Pond Geometry
Table