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REP20755
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Entry Properties
Last modified
8/24/2016 11:49:16 PM
Creation date
11/27/2007 2:57:46 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1980005
IBM Index Class Name
Report
Doc Date
3/2/1994
Doc Name
1993 WATER YEAR ANNUAL HYDROLOGY REPORT SENECA II MINE
Annual Report Year
1993
Permit Index Doc Type
HYDROLOGY REPORT
Media Type
D
Archive
No
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• Review of Table 16 shows that Site 6 displays a MgC a-S06 type eater. The annual average <br />TDS value of 2955 mg/t for 1993 falls within the historic range. <br />Surface Water Site SW-52-10. The site monitors Cow Camp Creek at its confluence with Fish <br />Creek. It is monitored May through September on a monthly basis. As was suspected by PCC <br />staff before initiating monitoring, this site floes less often than the upper Cow Camp <br />Creek, Site 6. This year, no flow was present at this site on the June through September <br />monthly visits, although Site 6 was flowing continuously those months. This reduction in <br />floe is due to stream channel infiltration, evapotranspiration, and the absence of lateral <br />inflow from tributaries to Cow Camp Creek. <br />Water at this site is a MgC a-S06 type. The one TDS value of 3110 mg/l for this year falls <br />within the historic range. <br />NPDES Discharge Point 008. The annual average flow (from weekly measurements) since this <br />pond began io flow are: <br />1993 = 0.332 cfs <br />1992 = 0.132 cfs <br />1991 = 0.112 cfs <br />1990 = 0.067 cfs <br />1989 = 0.108 cfs <br />1988 = 0.106 (reservoir did not completely fill until February 25, <br />1988). <br />Review of the hydrograph end the above table shows that discharges have increased since <br />1990, with this year having a significantly higher average flow due to increased snowpack <br />runoff. <br />Review of Table 15 shows that water at the 008 site is a MgCa-506 type. Date for Site 9 <br />(baseline site) is also supplied on this table to provide date for comparison. Water <br />previously sampled at Site 9 was a CaMg-HC03 type. The construction of Pond 008 and <br />subsequent mining activities above have resulted in increased TDS and sulfate in <br />comparison to baseline eater quality measured at Site 9. <br />Surface Water Site SW-52-12. This site monitors Bond Creek at its confluence with Fish <br />Creek. It is monitored May through September on a monthly basis. As was noted also at <br />11 <br />
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