2011-06-15_PERMIT FILE - C1981038A ‎(3)‎

• Permit No: C1981038A
• IBM Index Class Name: Permit File
• Doc Date: 6/15/2011
• Doc Name: page 100 to 164
• Section_Exhibit Name: 2.05 Operation and Reclamation Plans Part 3
• Media Type: D
• Archive: Yes

52.05 APPLICATION FOR PERMIT FOR SIIRFACE OR IINDERGROUND MINING ACTIVITIES --
MINIMUM REQUIREMENTS FOR OPERATION AND RECLAMATION PLANS.
2.05.6 Mitigation of Surface Coal Mining Operation Impacts. (Cont'd,)
(6) (e) (i) (D) The predicted subsidence related phe-
nomena which will occur within the per-
mit area is an overall lowering of the
ground surface, perhaps up to six ft.
- In zones of overburden thickness less
,i9-
~ than 800 ft. and unfavorable geological
,~9M
_ ~ conditions, tension cracks or compres-
~~
c,~ 9Ur1t
~ sional bulges may migrate [o the sur-
il
f
d
d d
i
i
b
5 ace. A
eta
e
escr
pt
on may
e
~ found in Section 2,05.6(b)(i)(B) and
\
b the Subsidence Appendix, Volume 3.
(E) In consultation with the Division, and
employing research by Dunrud, (1476),
Colorado Westmoreland Inc, has used a
conservative draw angle characteristic
of the permit area of 20.5 degrees from
vertical. As information is evaluated
from existing monitoring, the angle-of-
y~ draw will be adjusted to a more realis-
~ tic angle,
~~ ~"p,~\
~ ` (F) Refer to Map 3-1.
(I) Refer to Map 3-1.
(II) Refer to Maps 3-1, 2-4, and
2-5.
(III) Refer to Maps 3-1 and 2-9.
(I V) Refer to Plate 14 of the Geo-
Ilydro Consulting, Inc. report
in the Subsidence Appendix,
Volume 3.
(ii) (A) Structures are protected from undermin-
ing by lease stipulation. None the
less, CWI believes it is technological-
ly and economically feasible to prompt-
ly repair any subsidence related damage
to the condition they caould be in if
subsidence had not occurred (refer to
Subsidence Repair Portion of the Subsi-
dence Appendix, Volume 3).
Revised 08/01184
Revised 12/26/84
Revised 10/01/87
153