| 1 | Double-wall steel cofferdam is the important facility of bridge's deepwater foundation. | |
| 2 | The dam builders fail to consider the downstream effects of cofferdam failure. | |
| 3 | In this photo, workers clear floating debris near the cofferdam while demolition experts prepare to demolish it. | |
| 4 | This part of the dam serves as a cofferdam which protects the remainders of the foundation for further construction. | |
| 5 | Construction of the Three Gorges Dam required an enormous cofferdam , a structure that temporarily enclosed the construction site and kept water out. |
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