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Sunnyside Gold Corp. Page 4 March 10, 1993 <br /> Table 1. Sunnyside Mine bulkhead design conditions and flexural <br /> factors of safety <br /> Bulkhead Design Bulkhead Rebar Reinforcement Design Actual <br /> Tunnel Head Design Size Spacing Factor Factor <br /> Ident. feet Length in. of of <br /> (psi) feet Safety Safety <br /> American 1550 25 #10 7 1. 01 1.57 <br /> Tunnel (670) <br /> 13 x 13 ft <br /> F-Level 650 8 #10 7 1. 03 1. 60 <br /> Terry (280) <br /> Tunnel <br /> 11 x 11 ft <br /> F-Level 630 8 #10 9 1. 01 1.57 <br /> Brenneman/ (270) <br /> Sunnyside <br /> Connection, 10 x 10 ft <br /> B-Level 70 3 #6 12 1. 14 1.77 <br /> Brenneman/ (30) <br /> Sunnyside <br /> Connection, 9 x 9 ft <br />