2013-04-05_PERMIT FILE - C1981019A ‎(9)‎

• Permit No: C1981019A
• IBM Index Class Name: Permit File
• Doc Date: 4/5/2013
• Doc Name: West Taylor Pond Design
• Section_Exhibit Name: Exhibit 07 Item 20 Part C Page 7-20C-4 Figure 1C-3 - ST
• Media Type: M
• Archive: Yes

WEST TAYLOR POND - PLAN VIEW N
Scale 1' = 50' W E
s
PROFILE THROUGH EMBANKMENT CENTERLINE
SCALE 1" =50'
7530
-- 7530
7500 7500
--
7470 - -. 7470
I � I
7440 -.
7440
co 00 o o rn 0 C\1 LO 0 00 o 0
N
PROFILE THROUGH IMPOUNDMENT
7500 SCALE 1" =50' 7500
- T
7470
_ 7470
7440
' !.. - - - - - - - -- - - � _ 7440
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
M m m N O 00 <Y M
co Cl) c7 M R e} V b 4] tq co
EMBANKMENT DETAILS
Scale 1" = 20'
150, j
EARTHWORK QUANTITIES (APPROX. EXCLUDING KEYWAY)
CUT: 2,100 CU YD.
FILL: 5,500 CU YD
EMBANKMENT CREST
EL 7487.0 WALKWAY W 42" HANDRAILS AS SPECIFIED
EMERGENCY SPILLWAY
EL. 7478.0
PRINCIPAL SPILLWAY WITH NCRS ANTI- VORTEX TRASH RACK
EL. 7471.0
TWO 3" DIA PERFORATIONS PER ELEVATION AS SPECIFIED
EL. 7468.0 (LOWEST PERFORATION)
24" PAP PROTEFLUME ND // - - - v NORMAL POOL
24" PARSHALL FLUME AS SPECIFIED
BY FIELD ENGINEER EL. 7468.0 ATERMAN C -20 SLIDING GATEVALVE, EL. INVERT7459.0
ONE YEAR SEDIMENTACCUMULATION, EL. 7459.30
POND BOTTOM
®RIG. GROUND EL. 7455.0
ANTISEEP COLLARS 6 FT (MIN) EL. 7456.0
FOUR REQUIRED ON 20 FT CENTERS
18" B GALV STEEL CMP, 14 GAUGE MINIMUM,
2-2/3" X 1/2" HELICALLYCOR9RUGATED, POLYMER COATED 8 FT WIDE (MIN) KEYWAYS FT (Ml N) IN DEPTH WITH 7H:1V SIDES
AT20/ SLOPE EXTENDING ACROSS ENTIRE ABUTMENT
FABRIC WRAPPED FILTER, TRANSPORTAND PLACE:
20 CUBIC YARDS OF CLEAN, OPEN - GRADED GRAVEL (MINUS 2 INCH) APPROX. 1.0
TO 1.2 FEET THICK, 60 FEET IN LENGTH & EXTENDING ACROSS THE ENTIRE FOOTPRINT
OF THE LOWER ONE -THIRD OF DOWNSTREAM TOE BIELOW ELEV. 7468. FILTER FABRIC
SHALL BE MIRAFI 14ON NON -WOVEN OR EQUIVALENT, AND SHALL COMPLETELY
SURROUND THE GRAVEL IN ALL DIMENSIONS. ALL FABRIC EDGES SHALL BE PROVIDED
WITH 3 FEET OF OVERLAP WITH ADJACENT EDGE.
Construction Notes:
1, Premining Topography shown has been supplemented with one foot contour data based field survey
data collected by Epp & Associates during the Fall of 2006 using GPS methods.
2. See Map 41A for general location and associated drainage areas.
3. Embankment to be constructed of compacted fill using materials specified by field engineer. Refer to
to Exhibit 7, Item 20, Part F for Geotechnical Information and compaction specifications. Figure 3 of
that document contains requirements for site preparation, fill materials, placement requirements, and
monitoring.
4. Hatched area of the spillway and outlet section along groin shall be riprapped with 18 inch median
size material.
AREA - CAPACITY TABLE
ELEVATION
(Feet)
AREA
(Acres)
AVERAGEAREA
(Acres)
CAPACITY
INCREMENTAL
CUMULATIVE
(Acre -Feet)
(Acre -Feet)
7455
0.0202
0
OA565
0.28
7460
a0928
0.28
0.1496
0.75
7465
0.2063
1.03
0.3013
1.51
7470
0.3963
2.54
0.4969
2.48
7475
0.5976
5.02
0.6198
0.62
7476
0.6420
5.64
TOTAL CAPACITY 5.64 ACRE -FEET
ENGINEERS CERTIFICATION
I, THOMAS C. PETERSON, being a
Licensed Professional Engineer in
the State of Colorado, do hereby
certify that this map has been
reviewed by me and is true and
correct to the best of my knowledge
and information relying on
information supplied by experts
identified in section 2.03.3 of the
Colowyo Coal Company L.P. Permit.
0 L
pouwuii�i
C) •�qS TFP
v•r° o:0�
THOMAS C PETERSON
P.E. 32 57
�1iv
ATE
RECEIVEED RECEIVED
JUL 30 2012 JUL 30 1, .!
Division of Re�,.rnation,
uvision of Reciamabon. Mining and Safety
MiningarAu
C- 19x31 -oIQ 2N -in V - r, -
Page Exh. 7 -20C -3