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1 <br /> JOHN F. ABEL, JR. 4- 310 LOOKOUT VIEW COURT <br /> MINING ENGINEER GOLDEN,CO 80Q1 <br /> 303-279-4901 <br /> FAX 27"163 <br /> / / / -A JFAW20Ho wm <br /> January 15, 2001 <br /> Mr. Larry Perino Rece'V05d <br /> Sunnyside Gold Corp <br /> P.O. Box 177 <br /> Silverton, CO 81433 EB 12 �j <br /> Reference: American Tunnel Bulkheads #2 and #3 OivlsDu fM e/a1d0��8 <br /> Dear Larry: s&Geology <br /> This is the letter report you requested for the design of the <br /> two additional bulkheads for the American Tunnel . <br /> The purpose of Bulkhead #2 is to impound the approximately <br /> 630 gpm of water entering the American Tunnel between Bulkhead #2 <br /> (approximately Station 20+00) and existing Bulkhead #1 (Station <br /> 79+50) . The planned Bulkhead #2 location is approximately 59+50 <br /> feet toward the portal from Bulkhead #1 . Bulkhead #1 impounded <br /> the approximately 730 gpm of water flowing from the Brenneman, <br /> Washington and Sunnyside veins, as indicated on Figure la. The <br /> total American Tunnel water inflow between Bulkhead #1 and the <br /> planned location of Bulkhead #2 includes one major inflow, <br /> approximately 580 gpm of metal-laden and acidic groundwater <br /> between approximately Station 27+00 and Station 31+00 associated <br /> with a zone of fractured latite porphyry. Figures la, lb and lc, <br /> modified from the Simon Hydro-Search February 11, 1992 report <br /> indicate the quantity and low quality of the this inflow. <br /> The purpose of Bulkhead #3 (approximately Station 3+75) is to <br /> impound as much as possible of the approximately 170 gpm of better <br /> quality but still metal-laden water entering the American Tunnel <br /> between the planned location of Bulkhead #2 (approximately Station <br /> 20+00) and the portal (Station 0+00) . Figure 2 presents a plan <br /> view of the American Tunnel from the portal (P-3) to Station <br /> 34+00. Figure 3 provides a cross section of the American Tunnel <br /> from the portal to Station 31+00 . Table 1 provides a log of the <br /> water inflow locations from the air door (Station 2+20) and <br /> Station 29+40 and indicates the recommended location of Bulkhead <br /> #3 at Station 3+75. <br /> The location for Bulkhead #2 was selected at a dry and <br /> apparently impermeable rock section of the American Tunnel, <br />