REP28646

• Permit No: C1980007
• IBM Index Class Name: Report
• Doc Date: 4/30/1993
• Doc Name: 1993 Annual Hydrology Report
• Annual Report Year: 1993
• Permit Index Doc Type: HYDROLOGY REPORT
• Media Type: D
• Archive: No

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Hydologic Monitoring Ac~ivitics
ary, but it was mid-April before all stilling wells
had thawed. Debris buildup in the flumes was
minimal during 1992 and no data were lost due to
debris.
[n addition to the five MCC monitoring locations,
flow data are available from two USGS monitoring
stations. These stations are Minnesota Creek
downstream of Dry Creek and the North Fork of
the Gunnison River near Somerset, Colorado. The
North Fork sta[ion is loca[ed approximately ~/.-
mile upstream of the mine site. Because the
USGS gauging stations are heated, they were
unaffected by freezing temperatures. Data for the
1992 water year for these sites are presented in
Appendix B and Appendix C, respec[ively.
Seasonal (three times per year) water samples were
taken at all surface water monitoring stations
except the USGS North Fork station which is a
^ow data point only. Measured parameters includ-
ed pH, conductivity, temperature, total dissolved
solids, total suspended solids, total iron, and total
manganese. Sampling results are summarized in
Appendix D. Minimum and maximum information
for the baseline monitoring period is compared
with water year 1992 data for [he Sylvester Gulch
and North Fork Upper stations in Appendix E.
Spring Water Monitoring
Seven springs were monitored during the 1992 S3
water year (Table 2). Their locations are shown on -
Exhibit 1. All known springs in the lease area are
shown on Map 34 in Volume 5 of the M and R
Plan.
In accordance with U.S. Forest Service (USES)
stipulations, a map of USES water resources has
been included as Exhibi[ 2. Table 3 summarizes the
resources. Some of [he USES water resources are
springs. No changes in the USES Water Resources
Map are necessary for 1992 because no new rights
were filed for or new uses made in 1992 in the
lease area.
Two USES water resources (13l and 139) overlie
the current permit area, but are not in areas
planned to be mined. Also, the overburden is in
excess of 300 feet under these resources and no
mining related impacts are anticipated.
Seasonal measurements (three times per year) of
pH, conductivity, temperature, total dissolved
solids, [o[al suspended solids, total iron, and [otal
manganese were taken at each of the seven springs.
Measured flows, field parameters, and the results
of laboratory analyses are presented in Appen-
dix F. Maximum and minimum comparisons are
Table 2 Summary of the Spring Monitoring Program at the West Elk Mine

Location Frequenry of Discharge
Measurement Frequenry of Water Quality
Measurement
Springs Above the "F' Seam in the North Fork Drainage Basin
G-12 3 limes per year 3 times per year
G-14 3 times per year 3 times per year
G-16 3 times per year 3 times per year
G-22 3 times per year 3 times per year
G-24 3 times per year 3 times per year
Springs in or Below the " F' Seam in [he North Fork Drainage Basin
G-la 3 times per year 3 times per year
G-20 3 times per year 3 times per year
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