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S. S. Shuey Adequacy Review Responses July 23, 1992 Page 2 recovery because they underlie the area of the Hawksnest Mine that is assumed to be flooded. If future monitoring indicates that the area above these panels is not flooded, then recovery from these panels may be increased. Four exploratory NX, nominal 3-inch outside diameter, holes WSC DH 5, 6, 7 and 8, were apparently drilled downward from the Hawksnest Mine E-Seam workings through the B-Seam. Drill holes 5, 6 & 7 are located in the "known to be dry area". Drill hole 8 is located in the mine plan area for years 5 - 10 so its is not considered an issue at this time. 14d) An underground sump has been constructed in the B-Seam as shown on Map 5-007-B. The sump has a capacity of about 3 acre-feet. The pump intake will be located at the last crosscut to the east that enters the sump. At a flow rate of 425 gpm the sump would have a residence time of about 38 hours. Somerset has investigated the use of a flocculent manufactured by NALCO (EN-ACT 7883) but is uncertain at this time if a flocculent will be required. As of this date, the water being discharged from the mine is not a problem with regard to suspended solids. The underground sump in the B-Seam is not in use at this time. 14e) No response required. 14f - g) See 14d. 15a - d) Somerset has chosen drill hole WSC DH12 to monitor the water level in the Hawksnest Mine. This hole was added to the monitoring schedule on page 2.05-46iii. 15e) See 14a - c. 15f) No response required. 16) - 18) No response required. 19) The tributary to Thompson Creek is addressed on revised page 2.05-47. 20) Pages 2.04-16i, 2.04-39iv, 2.04-39v, 2.04-40, 2.04-52, 2.04-53i and 2.04-46iv were revised to change the description of Bear, Sanborn and Elk Creeks from ephemeral to intermittent.