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nTotal excavated material 525 000 y3.
nRiver excavated 275 000 y3.
nConcrete poured 80 000 y3.
nReinforcing steel used 750 tons.
nTotal structural steel 11 000 tons.
nDepth of mud 4 to 20 feet.
nMax depth of water 45 feet.
nlength of tunnel 5160 feet.
nCost $23 million.
nTraffic capacity per hour 2 000 vehicles.
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