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Top view of Pier 3 caisson in progress including reinforcing steel and dredge wells
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Pouring concrete for Pier 3 caisson
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Loading concrete from trucks onto the water
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Ice and snow slow progress, but they do not stop it
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"Dredging" pier 3 using a clam bucket suspended from a crane
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High pressure pumps remove sand and debris from beneath the caisson
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Side view of pier 3 caisson
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Erected steel "follower": this supports the walls of the cofferdam once it has been dewatered
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Sheet piles being installed around the follower: they form the wall of the cofferdam
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A vibratory hammer is used to drive sheet piles all the way down to bedrock
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Fully completed follower cofferdam at pier 3
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High pressure pumps remove sand from beneath the caisson and deposit it into the river
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Inside the follower cofferdam prior to dredging
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A pre-assembled reinforcing steel "cage" is hoisted to the north tower leg of pier 2
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Ironworkers finish installing reinforcing steel, or rebar, once the cage is in place
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Illinois access road being built up due to flooding
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These are pipes which protect the main cables that support the roadway
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Erecting falsework for the "bowtie" between the tower legs
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Very high flood waters prevent construction from taking place
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Steel forms used support concrete as it is being poured
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Inside the cofferdam before the caisson is built
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A view of piers 2 and 3 as they have sat for the last few years
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Illinois view of flood conditions easily covering the access road
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Leveling out sand before caisson construction begins
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Pier 3 "Cutting edge" made of steel plates and beam which form the bottom of the caisson
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Inside the "bowtie" at pier 2
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Pier 3 follower cofferdam as it is being dewatered