| 21. | One of those has given way and flooded ( a ) section of the cofferdam.
|
| 22. | The treasure-hunters were hampered in their efforts by an improvised cofferdam that leaked.
|
| 23. | This reduces the requirements for a cofferdam during construction and the sizing of the spillway.
|
| 24. | Due to a structural inadequacy, the cofferdam washed out on October 31, 1970.
|
| 25. | Fieldwork was completed by May 1997, after which the cofferdam was disassembled and sold.
|
| 26. | The cofferdam was winched up tightly against the ship with the assistance of Navy divers.
|
| 27. | The ships were equipped with cork cofferdams.
|
| 28. | One of our cofferdams has collapsed,
|
| 29. | In such cases the cofferdam is fabricated from sheet steel and welded into place under water.
|
| 30. | On 13 February 1912, the engineers let water back into the interior of the cofferdam.
|
