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Grand Island Resources,LLC ?a: <br /> Idaho Tunnel Portal—Slope Stability Analysis <br /> a <br /> r <br /> 1111 <br /> i <br /> Photograph 4—Decomposed gneiss overlying weathered and fractured gneiss in the right rib beneath <br /> the portal collapse. Green paint marks the approximate location of the next steel sets at 4-ft intervals. <br /> eg ,a 'PS y, 1 <br /> Wx <br /> �t <br /> hS A , /, . '3 1.,)n JMp �i'14 K e' ./ <br /> '. 4 :E t;,' . q <br /> r .o <br /> Hyl d <br /> 1 <br /> d 1, i,� � `,,L .yy,. T 1 <br /> ,,,,, , <br /> Photograph 5—Regolith and colluvium exposed in the walls of the collapse void. The threaded bars <br /> are some of the spillings which were installed before enlarging the portal excavation. <br />