2015-06-08_PERMIT FILE - C1996083A ‎(5)‎

• Permit No: C1996083A
• IBM Index Class Name: Permit File
• Doc Date: 6/8/2015
• 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 Shale
Mudstone
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)
1 26.4
28.8
14.9
10.2
0.0
SS -2(190)
1 7.5
52.0 65.5
40.0
1 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 or was 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 2010-1 SS. The data for well 2010-1 SS 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 2010-1 SS 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.
After the 2014 well rehabilitation work, 2010-1 SS had the following water quality: pH 9.75
su, conductivity 277 umhos/cm, total iron 4.31 mg/I, total manganese 0.0621 mg/I.
The Applicant worked over the active monitoring wells during 2014 so more consistent
data is available. Some of the data presented above should be discounted because the
data ranges are so great and the pH values indicate well contamination.
MR -172 2.05-123 01/15