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1 <br /> American Tunnel bulkheads #2 & #3 Page 8 January 15, 2001 <br /> Figure 3 . Cross section along American Tunnel, portal to Station 31+00 . <br /> 11600 - <br /> 11400 -- -- - - ------- - ----- <br /> 11200 — -- --- -- <br /> 11000 --- <br /> 10800 <br /> AMERICA4 TUNNEL Al <br /> 10600 <br /> 0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600 2800 30M <br /> c' <br /> ZI <br /> o �C <br /> m � � <br /> o c 0 <br /> n V <br />