2012-01-30_PERMIT FILE - C1996083A ‎(2)‎

• Permit No: C1996083A
• IBM Index Class Name: Permit File
• Doc Date: 1/30/2012
• Doc Name: pages 2.05-84 to 2.05-165
• Section_Exhibit Name: 2.05 Operation and Reclamation Plans Part 2
• Media Type: D
• Archive: Yes

The predicted gob pile leachate, based on the Upper B -Seam roof and floor
analyses presented in Volume III, Tab 6, has an average iron concentration
of 26.8 ppm and average manganese concentration of 1.9 ppm. The
predicted coal pile leachate based on the Upper B -Seam Coal analyses
presented in Volume III, Tab 6, has an average iron concentration of 8.6 ppm
iron and average manganese concentration of 0.1 ppm. The iron and
manganese baseline values for the river are obtained from the Bowie No. 2
Mine, 2006 annual hydrologic report, average from lower monitoring point.
The following table presents the impact gob pile leachate and coal pile would
have if it flowed into the river at the rate of 46.9 and 4.7 gallons per minute
respectively.
PHC North Fork of the Gunnsion River
• Based upon the above calculation, if leachate from the gob and coal piles
reached the North Fork of the Gunnison River, it will not have a significant
impact on the quality of water in the river.
The predicted pH of the gob pile leachate and coal, based on the data
presented in Volume III, Tab 6, are 9.2 and 9.3 respectively. The North Fork
of the Gunnison River has pH values in the 8.3 range. If the entire 55.6 gpm
of leachate entered the River, the pH of the River would increase from 8.3 to
8.305 which is insignificant.
• PR -12 2.05-113 02/1
/�10�120V61�
Flow gpm
Flow cfs
Iron (ppm)
Mn (ppm)
North Fork
11,220
25.00
0.21
0.09
Gob Leachate Discharge
50.9
0.11
26.8
1.9
Coal Pile Leachate
4.7
0.01
8.6
0.1
Combined Flow
1 11,275.61
25.121
0.331
0.098
• Based upon the above calculation, if leachate from the gob and coal piles
reached the North Fork of the Gunnison River, it will not have a significant
impact on the quality of water in the river.
The predicted pH of the gob pile leachate and coal, based on the data
presented in Volume III, Tab 6, are 9.2 and 9.3 respectively. The North Fork
of the Gunnison River has pH values in the 8.3 range. If the entire 55.6 gpm
of leachate entered the River, the pH of the River would increase from 8.3 to
8.305 which is insignificant.
• PR -12 2.05-113 02/1
/�10�120V61�