2011-06-20_REVISION - C1981019 ‎(14)‎

• Permit No: C1981019
• IBM Index Class Name: Revision
• Doc Date: 6/20/2011
• Doc Name: Revised 3/28/2011 Exhibit 7 Item 23 Figure E1 Temporary Channel Design
• Type & Sequence: PR3
• Media Type: M
• Archive: No

J � �
rf
1
/
-
a
i
i
1�,
r
r Little C m " nd Ac ass Road
(Sea .hits r *em , Figure 1)
Little Collom and - --
/ (Se Exhibit 7, Item 26. Fig a 'I) -
`> ,/, - -
LEGEND
C i ,
1
fill
V, a9
cN
i
if
SECTION LINE
PROPOSED V DITCH
- TRAPEZOIDAL DITCH
--�- PROPOSED CLEAN WATER TRAPEZOIDAL DITCH
TEMPORARY OVERBURDEN
STOCKPILE OUTLINE
PMT TIE -IN
-- FUTURE PIT MINING LIMITS
TOPSOIL STIPPING 6 MONTHS
NOteS: The worst case condtitlon renects ithe
extent of clearing topsoil and stripping
on all disturbed areas at 6 months from
commencement of construction.
Watershed boundaries are shown on Exh. 7 -23 Figure Al.
SEDCAD modeling th of these ditches is rovided in Exh. 7 -23 Part A.
See Map 23B for e location of the ditches relative to other
Collom mining activities. See Exh. 7 -23 Figure E2 for profiles.
N
N
W E
S
0 500' 1000'
Contour Interval 25 FT
TOPO: Premine Topography
ENGINEER'S CERTIFICATION Exhibit 7, Item 23, Figure El
f, THOMAS C. PETERSON, being a
Licensed Professional Engineer in
the State of Colorado, do hereby Temporary Channel Design
certify that this map has been
reviewed by me and is true and SCALE. T" = 1000'
correct to the best of my knowledge DATE. 12115110
and information relying on work ORWG. BY." RWF
performed by others and based on Colowyo Coal Company APPROVED BY TCP
information supplied by experts 5731 state Highway 13
identified in section 2.03 -3 of the ►+• Meeker, C.b.d. 81641
Colowyo Coal Company L.P- Permit -
O
011L l p7j,''i
���� p�P•.•• ••. ce 11it No. REVISION DATE BY HK
v •5 C' Pfp •.• J' i
U o o•; o PR03 NEW MAP 12115110 TCP KRB
32257
i �O •'• 3/�r7; •• 4� : Pi PMT Tie-in boundary change, ditch edits 3125111 TCP KR8
THOMAS C PETERSON
P.E. 3�257
is)2
DATE