2014-10-10_PERMIT FILE - C1996083A ‎(22)‎

• Permit No: C1996083A
• IBM Index Class Name: Permit File
• Doc Date: 10/10/2014
• Doc Name: Information on Environmental Resources
• Section_Exhibit Name: Volume I 2.04 Information on Environmental Resources
• Media Type: D
• Archive: Yes

2.04.7 Hydrology Description
average conditions during late summer months when flows are at or near
their lowest monthly levels. (Wright Water Engineers (WWE) Evaluation of
Potential Subsidence Impacts of Longwall Mining in the Spruce Stomp Lease
Area to Aquatic Life and Water Supply January 2013)
The following average monthly flows for West Fork Terror Creek were
calculated using depth measurements made by Bowie and culvert rating
curve developed by WWE.
West Terror Creek (downstream) Average Monthly Flow (cfs) (SW -01)
Period of Record 2005 - 2012
Month
Mar
Apr
May
Jun
Jul
Aug
Se t.03
Oct
Nov
Dec
2005
4.4
2.5
1.7
1.0
1.8
2.8
2
2006
46
6.0
1.2
0.9
0.4
1.0
4.4
4.2
2007
30.4
2.2
2.1
2.6
2008
5.6
1.4
1.2
2009
67
5.2
2.1
1.6
2010
4.4
7.6
0.4
2.4
2011
71.8
78.0
15.6
0.7
2.2
2012
10.8
19.8
4.55
2.95
0.95
1.0
0.6
1.05
0.8
Average
15.2
51.5
29.5
5.59
1.45
1.03
1.16
2.42
2.13
2.33
Maximum
30.4
71.8
78.0
15.6
2.5
1.7
2.1
4.4
4.2
2.6
There are four unnamed, generally west to east flowing, ephemeral gulches,
and two unnamed generally east to west flowing ephemeral gulches which
are tributary to Terror Creek within the permit and adjacent area. These
gulches are expected to be typically dry with flow occurring during spring
snowmelt and after significant precipitation events.
Stephens Draw is the first drainage located west of the Bowie No. 2 Mine
portals. It is characterized by steep to nearly vertical canyon walls. This
Draw is an intermittent stream with greatest flow to be expected during spring
snowmelt and significant precipitation events. Stockpond P -1 is located in
Stephens Draw in the south central portion of the permit area. Monitoring
performed during 1984 shows this pond had discharge that ranged from 3 to
20 gallons per minute. Flow monitoring for Stephens Draw immediately
below the pond show flows ranging from a seep to 1.58 gpm for the period of
September 1995 through September 1998.
Four unnamed ephemeral drainages are located within the permit area
between Stephens Draw and Hubbard Creek. From west to east they are
named A- Gulch, B- Gulch, C -Gulch and D- Gulch. These gulches would only
PR -14 2.04-54- 06/14