2012-06-26_PERMIT FILE - C1996083A ‎(5)‎

• Permit No: C1996083A
• IBM Index Class Name: Permit File
• Doc Date: 6/26/2012
• Doc Name: APPLICATION FOR PERMIT FOR SURFACE OR UNDERGROUND MINING ACTIVITIES
• Section_Exhibit Name: 2.04 Information on Environmental Resources
• Media Type: D
• Archive: Yes

2.04.7 Hydrology Description
The quality of water in Terror Creek is good. The following data are based
on the upstream monitoring location (D32 -4).
Terror Creek U stream Quality at D32 -4 2004 - 2009
Minimum
Maximum
Average
H (su)
7.4
8.6
8.2
Total Dissolved Solids (m g/1)
37
342
125
Total Suspended Solids (m g/1)
<MDL
100
31
Total Iron (mg/l
0.02
2.36
0.602
Total Manganese (m g/1)
<MDL
0.071
0.034
•
The quality of water in Hubbard Creek is good. The following data are based
on the upstream monitoring location (D34 -14).
Hubbard Creek U stream Quality at D34 -14 2004 - 2009
Minimum
Minimum
Maximum
Average
H (su)
7.2
8.8
8.3
Total Dissolved Solids (m g/1)
50
1700
213
Total Suspended Solids (m g/1)
<MDL
44.5
14.1
Total Iron (m g/1)
0.03
1.14
0.355
Total Manganese (m g/1)
<MDL
0.043
0.021
The quality of water in Iron Point Gulch is good. The following data are
based on the downstream monitoring location (D34 -12).
Iron Point Gulch Downstream Quality at D34 -12 2004 - 2009
Minimum
Maximum
Average
H (su)
7.9
8.6
8.2
Total Dissolved Solids (m g/1)
95.0
311
205.7
Total Suspended Solids (m g/1)
<MDL
64.0
23.4
Total Iron (m g/1)
<MDL
2.38
1 0.505
Total Manganese (m g/1)
<MDL
0.06
0.042
Total dissolved solids and electro- conductivity diminish as functions of peak
flows due to the diluting effect of run -off events. The pH values or acidity of
surface waters usually remain stable during peak flows and either increase
during low flow due to increased concentrations of caliche derived soluble
material, or decrease due to higher concentrations of humic material,
depending upon vegetation influences on the drainage basin.
(3) Mining in the B -Seam and D -Seam could dewater saturated portions of the
seam and may temporarily dry the B -Seam and D -Seam outcrop and the
related springs and seeps. After mining, the eastern section of the mine
should fill with water to approximate premining levels. The water quality in
the mine could be degraded because it will be exposed to collapsed strata.
The probable impact would be an increased concentration of TDS, iron and
manganese and possibly sulfate. Although no data for permeability or
transmissivity of the saturated portions of the coal bearing member of the
Mesaverde Formation are available within the permit area, the experience by
PR -12 2.04-49- 06/10
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