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
Lower Perched Water Zone and Rollins Sandstone
A sufficient number of data points were obtained from the drill holes to plot
potentiometric surfaces. As seen on Maps 10A, 10B and 11, the
potentiometric contours generally fit the geohydrological setting of the permit
area in that the saturated horizons (or potentiometric surface) gently dip
northward, following the structural attitude of the bedrock horizons. East of
Terror Creek the lower perched water bearing zone is more continuous than
the upper perched water bearing zone. Map 11 projects the piezometric
surface of the lower perched water bearing zone in the northeastern portion
of the permit area. Map 11 -1 is a fence diagram showing the lower perched
water bearing zone in relation to monitoring wells and the underling B -Seam.
The lower perched water bearing zone contours were not projected into the
west mining area since the geohydrologic setting changes west of Terror
Creek and most of the projected contours would be located north of the
western mining area. Map 10A presents the regional projection of the
potentiometric surface above the B -Seam.
The Rollins Sandstone in the permit and adjacent area is characterized as
dry along the outcrop and develops piezometric head as the formation dips
to the north. Monitoring well DH -34B, NM4 -98 -29 and TC- 03 -01(R) are
completed in the Rollins Sandstone. The water level in all three wells is
under artesian conditions ranging from 200 to 475 feet. Monitoring well
NM4 -98 -29 was located underground in the Bowie No. 2 Mine, D -Seam north
mains. Oxbow has two wells completed in the Rollins Sandstone (SC -1 &
SC -2) and they are also reported to be under artesian conditions (SMC
permit section 2.04.7). Mountain Coal Company has one well completed in
the Rollins Sandstone (SOM- 128 -H) which is also under artesian conditions
(MCC 1994 AHR). The quality of the water in the Rollins Sandstone is poor
with the Bowie No. 2 Mine wells exhibiting better quality than adjacent mines.
The following table presents typical values for selected chemical parameters
from the water in the Rollins Sandstone from the three mines referenced
above:
PR -14 2.04-41- 03/14