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s <br />Sanborn Creek Mine 1995 Annual Hydrologic Report <br />The water level in SC-1 has been in the range from 6011 feet to <br />6028 feet. The water level in SC-2 has been in the range from 6051 <br />feet to 6081 feet. The water level in SC-3 has been in the range <br />from 6069 feet to 6088 feet. <br />Station WSC DH12, a methane degassification drill hole for the <br />Hawk's Nest Mine, is monitored annually in June for field <br />parameters and full suite of groundwater parameters. WSC DH12 was <br />dry. The purpose of monitoring WSC DH12 is to determine the water <br />level in the E-Seam workings of the Hawk's Nest Mine. This is the <br />only remaining drill hole open into the Hawk's Nest Mine from the <br />surface following reclamation activities by the Division. Other <br />drill hole sites were inspected with Division personnel in June <br />1994 to determine if any were usable for SMC monitoring activities. <br />None of the open drill holes were down-dip from WSC DH12, so the <br />Division reportedly reclaimed all other drill holes. <br />Sanborn Creek Mine Discharge <br />• <br />• <br />Outfall 011 is the mine water discharge from the Sanborn Creek <br />Mine, which discharges into Sanborn Creek. Outfall 011 was <br />monitored for the full suite of groundwater parameters quarterly <br />for 1995, as required by Technical Revision No. 20. The data for <br />Outfall 011 are contained in Appendix 5. <br />During 1994, MSHA granted approval to use the idle C-Seam workings <br />as a sump. This has increased the retention time to settle out the <br />suspended solids from the mine discharge water. Weekly monitoring <br />of Outfall 011 for the discharge permit requirements has shown <br />continued compliance with the total suspended solids effluent <br />limitation. As a result of the continued compliance, the discharge <br />permit was amended to sampling for Total Suspended Solids on a <br />monthly basis, beginning with the fourth quarter of 1995. Field <br />parameters are still measured weekly. <br />The annual mine inflow study is presented on the Mine Inflow Map in <br />the appendix. No significant changes to mine inflow have occurred <br />in the past year. <br />10 <br />