2014-10-10_PERMIT FILE - C1996083A ‎(24)‎

• Permit No: C1996083A
• IBM Index Class Name: Permit File
• Doc Date: 10/10/2014
• Doc Name: pages 2.05-84 to 2.05-165
• Section_Exhibit Name: Volume I 2.05 Operation and Reclamation Plans Part 2
• Media Type: D
• Archive: Yes

Hole (Interburden)
Mudstone
Sandy
M udstone
Shale
Sandstone
Coal
Lost
Core
TC -03 -03 (74.5)
23.0
28.3
4.0
19.2
0.0
CWI -DH -50 (70.6)
31.7
17.7
10.0
8.0
3.2
CWI -DH -51 (70.0)
16.2
47.1
0.0
6.7
0.0
CWI -DH -62 (105)
9.0
60.0
15.5
20.5
0.0
SS -9 (80.3)
26.4
28.8
14.9
10.2
0.0
SS-2(190)
7.5
52.0
65.5
40.0
25.0
0.0
Maps 08 and 08A present lithologic logs that show the hydraulic isolation of the
Rollins Sandstone.
The perched water below the D -Seam and above the B -Seam is or was monitored
by drill holes DH -58a and DH- 67 -Blw. DH- 67 -Blw may show the most consistent
data. By eliminating some early monitoring data, the quality of water in this perched
water being zone, as reported in the 2013 AHR shows pH in the range of 7.8 to 9.2,
conductivity ranges from 1065 to 3700 umhos /cm, total recoverable iron ranges from
<MDL to 1.92 mg /I and total recoverable manganese ranges from 0.01 to 0.19 mg /I
for the period September 2004 to March 2007. Based on the quality of the mine
water discussed above, mine water seepage into the perched water below the D-
Seam and above the B -Seam would improve the water quality in the perched water
bearing zones.
The perched water above the D -Seam is orwas monitored by drill holes DH -58, 66,
and DH -67 -Abv. DH -67 -Abv shows the most consistent data. By eliminating some
early monitoring data, the quality of water in this perched water bearing zone, as
reported in the 2013 AHR show pH in the range of 7.1 to 7.9, conductivity ranges
from 2000 to 3700 umhos /cm and total recoverable iron ranges from 0.046 to 1.82
mg /I and total recoverable manganese ranges from 0.006 to 0.05 mg /I for the period
June 2005 to November 2013. Based on the quality of the mine water discussed
above, mine water seepage into the perched water above the D -Seam would
improve the water quality in the upper perched water bearing zone.
In the western mining district, west of Terror Creek, the perched water above the B-
Seam is monitored at monitoring well 2010 -1SS. The data for well 2010 -1SS
suggests that the well was poorly constructed rendering the water quality data
invalid. Eliminating the first two monitoring events from the historic data yields more
consistent information with the high pH the most questionable data. In well 2010 -
1SS completed in a sandstone water bearing zone located above the B -Seam the
average conductivity is 2,900 umhos /cm with a range of 2,400 to 3,900 umhos /cm,
the average ph was 12.7 with a range of 12.5 to 12.9, average total iron was 0.32
mg /I with a range of 0.18 to 0.63 mg /I and average manganese was 0.02 mg /I with a
range of <MDL to 0.02 mg /I for the period September 2012 to October 2013.
The Applicant plans to work over the active monitoring wells during 2014 so it can
obtain more consistent data. Some of the data presented above should be
discounted because the data ranges are so great and the pH values indicate well
contamination.
PR -14 2.05-123 09/14