2011-08-09_REVISION - C1981019 ‎(10)‎

• Permit No: C1981019
• IBM Index Class Name: REVISION
• Doc Date: 8/9/2011
• Doc Name: Application for Permit Revision ‎(Part 2 of 2)‎
• From: Colowyo Coal Company
• To: DRMS
• Type & Sequence: PR3
• Email Name: MLT
• Media Type: D
• Archive: No

pH
Conductivity @ 25 °C
Total Dissolved
Solids
Total Suspended Solids
Calcium (Ca +z
Magnesium (Mg +z)°
Ammonia (NH
Nitrate- Nitrite
Sodium (Na + ) D
Sulfate (SO4 )
Arsenic (As)
Iron - Total
Mercury (Hg)
Manganese (Mn)
Selenium (Se)
Zinc (Zn) D
D = Dissolved
TD = Total Dissolved
T = Total
TR = Total Recoverable
•
•
RULE 4 PERFORMANCE STANDARDS
3. Lower Little Collom Gulch (LLCG) represents the conditions in Little Collom Gulch downstream of
all mining disturbances. Because Little Collom Gulch is ephemeral, and the mining area extends
nearly to the headwaters, no upstream monitoring location can be established.
4. West Fork of Jubb Creek (WFJC) represents conditions in the Jubb Creek watershed adjacent to the
mining disturbance.
5. Confluence of Jubb Creek (CJC) represents the aggregate water quality in the Jubb Creek basin,
downstream of potential mining impact areas.
6. Lower Taylor Creek (LTC) represents the water quality conditions of Taylor Creek directly
downstream of the South Taylor mining area and immediately prior to the confluence with Wilson
Creek and immediately downstream of the Gossard Loadout.
7. Lower West Fork Good Spring Creek (LWFGSC) represents this tributary after potential impacts
caused by South Taylor mining.
8. East Fork Good Spring Creek (EFGSC) represents the upstream, undisturbed background condition
of the East Fork Good Spring Creek.
9. Upper West Fork Good Spring Creek (UWFGSC) represents the upstream, undisturbed background
condition of the West Fork Good Spring Creek.
10. New Upper Good Spring Creek (NUGSC) represents the water quality of Good Spring Creek
downstream of the confluence of the east and west forks of the creek and downstream of the South
Taylor mining area.
11. Lower Good Spring Creek (LGSC) represents the water quality downstream of the South Taylor and
existing mining areas.
uarterly Surface Water Field Parameters
Temperature
Flow
pH
Conductivity
uarterly Surface Water Laboratory Parameters
Prior to mining at Lower Wilson, the following three surface water monitoring sites will be added
to the sampling schedule:
1. Upper Wilson Creek (UWC) represents water quality upstream of all mining impacts.
2. Upper Middle Wilson Creek (UMWC) represents water quality downstream of the
proposed Lower Wilson mining area.
3. Lower Wilson Creek (LWC) represents water quality immediately upstream of the
confluence with Taylor Creek.
Collom — Rule 4, Page 14
Revision Date: 8/5/11
Revision No.: PR -03