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SEPr7 <br />SUNNYSIDE GOLD CORPORATION <br />AN ECHO DAY COMPANY <br />P.O. Box 177 • Silverton, CO 81433 <br />Ei# (970) 387 -5533 • Fax (970) 387 -5310 Durango Field Office <br />Division of Minerals & Geology <br />Division of Minerals and Geology <br />Mr. Wally Erickson, Reclamation Specialist <br />Division of Minerals and Geology <br />Department of Natural Resources <br />701 Camino del Rio, Room 125 <br />Durango, CO 81301 <br />September 5, 2000 <br />DENVER OFFICE <br />PUBLIC FILE COPY <br />FILE ;v1. - ' <br />S I EE ;S rtyS ci 4 <br />RE: File No. M✓77 -378, San Juan County <br />i._A equacy Issues for TR -2 <br />Dear Mr. Erickson: <br />To address the issues specified in your adequacy letter for TR -22 dated September 1, <br />2000, Sunnyside Gold Corporation (SGC) submits the following. <br />1. Specify the type of concrete mix to be utilized in the near surface <br />bulkhead. <br />SGC plans to use the mix that was used in the American Tunnel bulkhead. While <br />this mix will most likely provide strengths in excess of the 3000 psi required, the <br />mix design is proven and it is planned to use the same batch plant that provided <br />the concrete for the American Tunnel bulkhead. <br />Concrete Mix: <br />Portland Type V <br />Coarse Aggregate <br />Fine Aggregate <br />Fly Ash, Class F <br />Water <br />Delay Set (4 -6 hours) <br /># /cu.yd. <br />720 <br />1673 <br />1004 <br />115 <br />324 <br />III IIIIIIIIIIIIIIII <br />Received <br />