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999 <br /> Hecefvea <br /> OCT l 81ggg <br /> Sttr1NYSIDE GOLD CORPORATION ou <br /> AN ECt3013AY COMPANY 01visb,Of Field pHice <br /> Minerals&Geol <br /> P.O. Box 177 • Silverton, CO 81433 ogy <br /> Phone (970) 387-5533 • Fax (970) 387-5310 D jVVZ . <br /> rrIJ LIC P/1 �1C e <br /> October 13, 1999 s,6��• ��Y <br /> T <br /> 3 <br /> Mr. Wally Erickson sec yy ne <br /> Colorado Division of Minerals and Geology �e`,-s;�h �` e <br /> Durango Field Office W,.. <br /> 701 Camino Del Rio, Room 125 RECEIVE• <br /> Durango, Colorado 81301 <br /> RE: MLR Permit M-77-378 <br /> Dear Mr. Erickson: <br /> This report is submitted to satisfy Commitments#1 and#2 made by Sunnyside Gold Corporation <br /> (SGC)to the Division of Minerals and Geology(DMG) in the approval process for MLR Permit <br /> No. M-77-378, Revision No. TR-014. These Commitments address significant changes in <br /> quantity or quality of hydraulic conditions in the drainages surrounding the Sunnyside Mine. <br /> Due to an extremely wet summer season in the Animas Basin, all drainages are experiencing <br /> increased flow over normal from all sources. While this is a regional phenomenon, SGC is <br /> reporting the flow from the Mogul Level No.l (M-1) as a potential change in quality and <br /> quantity. We have insufficient information to know whether this flow may be related to the <br /> flooding of the Sunnyside Mine workings which requires reporting in Commitments #1 and#2 <br /> and the TR-014 approval letter dated November 18, 1993,but;the flow is significant;the quality <br /> is significantly different from Sunnyside's background data set; the flow is significantly higher <br /> than previously measured; and the monitoring site is below the level of the mine pool. <br /> Proportionally, other nearby sites have experienced similar flow changes in the same time period <br /> and are above the mine pool elevation. Current analytical data is not available from these sites <br /> due to the monitoring schedule. <br /> Enclosed for your review are monitoring results for site M-1. After receiving the September <br /> sample results and recognizing the variance from the data set, Sunnyside had the results <br /> confirmed and expedited another sample with characterization parameters added to the normal <br /> monitoring suite. Although there are characterization parameter differences from the pre- <br /> bulkhead sample, the comparison is closer to the pre-bulkhead sample results than to American <br /> Tunnel mine pool characterization results (attached). <br /> Based on the characterization comparison,temperature(too cold), and inability to account for a <br /> loss of mine pool inflow based on pressure gage readings (pool rise), Sunnyside does not believe <br />