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American Tunnel bulkheads #2 & #3 Page 6 January 15, 2001 <br /> Table 1 . Water inflow points between portal, Station 0+00, and Station 27+00 (Continued) <br /> Distance Notes Distance Notes <br /> from from <br /> Portal Portal <br /> 21+20 - 27+20 S rib seepage reduces 28+33 Size 15.51W x 13.51H <br /> N rib seepage moderate 28+45 Size 12.51W x 13.51H <br /> 27+20 Both ribs dry up - minor seeps only 29+40 Flow measurement weir <br /> 28+20 Potential bulkhead site <br /> size 12.51W x 131H <br /> NOTES : "S" - south; "N" - north; "W" - width; "H" - height; "Seepage" - isolated water <br /> seeps exposed on ribs; "Minor" - water seeps exposed on entire rib; "Moderate" - <br /> isolated water streams running down rib; "Heavy" - streams of water running down <br /> entire rib face. <br />