_REPORT - C1980007

• Permit No: C1980007
• IBM Index Class Name: Report
• Doc Name: ANNUAL HYDROLOGY REPORT MT GUNNISON NO 1 MINE WATER YEAR 1989
• Annual Report Year: 1989
• Permit Index Doc Type: Hydrology Report
• Media Type: D
• Archive: No

• Hydrologic Afonhoring Acrivitiu
In addition to the five WECC monitoring Iota- Exhibit I. All known springs in the lease area are
tions, flow data arc available from two USGS shown on Exhibit 2.8.1.B. in Volume 3 of the M
monitoring stations. These stations are Minnesota and R Plan.
Creek downstream of Dry Creek and the North
Fork of the Gunnison River near Somerset, Colo- In accordance with U.S. Forest Service (USFS)
rado. The North Fork station is located approxi- stipulations, a map of USFS water resources has
mately 'h-mile upstream of the mine site. Because been included as Exhibit Ill. Table 3 summarizes
the USGS gauging stations are heated, they were the resources. Some of the USFS water resources
unaffected by freezing temperatures. Data for the are springs. No changes in the USFS Water Re-
1989 water year for these sites are presented in sources Map are necessary for 1990 because no
Appendix B and Appendix C, respectively. new rights were filed for or new uses made in 1989
in the lease area.
Seasonal (three times per year)water samples were
taken at all surface water monitoring stations Seasonal measurements (three times per year) of
except the USGS North Fork station. Measured pH, conductivity, temperature, total dissolved
parameters included pH,conductivity,temperature, solids, total suspended solids, total iron, and total
total dissolved solids, total suspended solids, total manganese were taken at each of the seven springs.
iron, and total manganese. Sampling results are Measured flows, field parameters, and the results
summarized in Appendix D. Minimum and maxi- of laboratory analyses are presented in Appcn-
mum information for the entire monitoring periods dix F.Maximum and minimum information for the
for the Sylvester Gulch and North Fork Upper entire monitoring period is presented in Appen-
stations is presented in Appendix E. dix E. Bar graphs depicting spring flows from 1979
to the present have been included as Appendix G.
SPRING WATER
MONITORING Except for springs G-la and G-22, sampling
records were complete. Flows at G-la-]a and G-22
were either nonexistent or insufficient for sampling
Seven springs were monitored during the 1989 during all three sampling periods. Consequently,
water year (Table 2). Their locations are shown on no water quality data were acquired.
TABLE 2 Summary of the Mt. Gunnison No. 1 Mine Spring Monitoring Program
Location Frequency of Discharge Frequency of Water Quality
Measurement Measurement
Springs Above the "F' Seam in the North Fork Drainage Basin
G - 12 3 times 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 the 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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