REP01431

• Permit No: C1980007
• IBM Index Class Name: Report
• Doc Date: 5/5/1995
• Doc Name: 1994 ANNUAL HYDROLOGY REPORT
• Annual Report Year: 1994
• Permit Index Doc Type: HYDROLOGY REPORT
• Media Type: D
• Archive: No

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1.0 Hydrologic Mortiroring Ac7ivinet
Maximum and minimum values for the
baseline monitoring period are included
with WY 1994 data in Table F-1 for the
seven established springs. Bar graphs
depicting the seven spring flows from 1979
to the present are at Appendix G. Baseline
data for the additional springs is now
established following intensive monitoring
between August 1993 through September
1994.
impacts to the "E" coal seam. Monitoring
wells SOM-C-72-H, SOM-127-H (Sealed
and abandoned prior to WY 1994), SOM-
129-H, and JMB-12 (Jumbo Mountain
expansion well in addition to WY 1994
monitoring program) were established to
monitor for hydrologic impacts within the
"B" seam of coal. Well SOM-128-H was
established to monitor for hydrologic
impacts to the Rollins Sandstone, located
just below the "B" seam of coal.
MCC informally monitors USFS water
resources shown in Figure 2. Table 1.3-2
summarizes these resources. Some of the
USFS water resources are springs. No
changes in the USFS Water Resources Map
are necessary for WY 1994 because no new
rights were filed for or new uses made in
WY 1994 in the permit area. Two USFS
water resources (131 and 139) overlie the
current permit area. No mining related
impacts (i.e., no loss of flow) are
an[icipated due to the thickness of
overburden between the B seam and the
sites.
1.4 GROUNDWATER
MONITORING
There were 25 wells in the FY 1994 WY
monitoring program. Their locations are
shown on Exhibit 1. Well completion data
is found on Table 1.4-1. Facility area
alluvial wells (SG-1 and GP-1, 3, 4, and 5)
were established to monitor the impact of
the lower refuse pile on alluvial
groundwater. Monitoring wells B-32, SOM-
13-H, SOM-38-H-2, SOM-80-H, SW-1,
SW-2, SW-3, SW-4, SW-5, and SW-6 were
established to monitor for hydrologic
impacts to the Barren Member above the
"F" seam of coal from mining activities.
Monitoring wells SOM-2-H, SOM-16-H,
and SOM-38-H-3 were established to
monitor for hydrologic impacts within the
"F" coal seam from mining activities.
Monitoring well SOM-23-H-2 was
established to monitor for hydrologic
R3.210/IOA/OS~OS/93(B:Onam)
Sampling frequency for water levels and
water quality was a minimum (scheduled) of
3 times per year. Monitored field parameters
included water level, pH, conductivity,
temperature, dissolved oxygen, and
turbidity. Samples were analyzed in the
laboratory for pH, specific conductance,
total dissolved solids, total suspended solids,
total iron, and total manganese. A summary
of the groundwater monitoring program is
presented in Table 1.4-2. Results of the
sampling efforts are summarized in
Appendix H. Hydrographs depicting water
levels from 1978 to the present have been
included as Appendix I. Minimum and
maximum values for the baseline monitoring
period are incorporated into tables in
Appendix H.
1.5 MINE WATER
MONITORING
1.5.1 North Fork Water
During WY 1982, a portion of the
conditional right to withdraw water from the
North Fork was deemed absolute. When
this water right is in priority (typica]]y when
the river flows greater than 300 cubic feet
per second (cfs) and no "call" is made
downstream), water can be pumped from the
intake point to the freshwater storage pond
within the surface facilities area. In average
years, this water right is expected to be out
of priority from July to September. In 1994,
Mountain Coal's water rights were out of
7 REVISED 10/02/96