REP06512

• Permit No: C1981041
• IBM Index Class Name: Report
• Doc Name: 1992 Annual Hydrologic Report
• Annual Report Year: 1992
• Permit Index Doc Type: HYDROLOGY REPORT
• Media Type: D
• Archive: No

Annual Hydrologic Report
• Page Four
related to mine inflows. Diagram 592-6 was prepared to graph TDS
against time. Little information is available to assess why
changes occurred but the most important factor was the location
from which pumping occurred. The source of 1979 - 80 water was
from the development of No. 1 North Mains toward Location 1. From
1981 - 86 the source was primarily Roadside Mine inflow location
3 but also included some from location 5 after 1984. During 1987
and 1988 no water was being discharged but was drained to
abandoned areas of the mine. Since 1988 the source has primarily
been location 3 with minor amounts of location 5. The spike in
1992 had to do with an increase in flow at location 3 caused by
renewed irrigation above the mine.
Discharge point 002 had not reached the point of discharge by the
end of the hydrologic year. As projected in the 1991 AHR,
discharge did start in December 1992. Information on this
outfall will be included in the 1993 AHR. Table 592-6 is a
summary of former monitoring results, Diagram 592-7 was prepared
to plot TDS against time. Up until 1983 this outfall was
primarily from dewatering at Roadside inflow location no. 1 and
inflows to the north. As more area was developed the TDS went
up. Since 1983 increasing amounts of water from location 5 was
routed through this outfall which diluted the TDS. Since 1986
• pumping was only done for a few months in 1989.
Table 592-7 was prepared to summarize monitoring information from
outfall 003. This outfall was a dewatering well from the old
Cameo Mine. As mining in the Cameo No. 1 Mine proceeded past the
old mine, the water level dropped below the pump. Diagram 592-8
was prepared to plot TDS against time. Note that pumping from
this site has not been done since 1979. This outfall has been
dropped from out CDPS permit.
Discharge point 004 continued to discharge all year from the
Cameo No. 1 Mine. A list of weekly monitoring results is given
on pages SF-9 thru SF-11. Table 592-8 is a summary of results
for the year and Table 592-9 is a summary of results since 1979.
Table 592-10 summarizes the average monthly flow. These flows
show a modified seasonal relation. Part of the discharge is
manually regulated from an old portion of the mine without a
direct connection to inflows. Diagram 592-9 was prepared to plot
TDS against time. The Cameo No. 1 Mine reached its maximum
extent of development in the spring of 1982 corresponding with
peak TDS readings. The downward trend from there may indicate a
flushing of minerals in the flow path of the water. The wide
range of TDS levels since 1988 has to do with various
combinations of the 3 water sources being pumped. The portal
under drain at Cameo inflow location 1, the sealed area at
location 8 and the rest of the mine.