11. The company built several coffer dams , all of which were destroyed when the river flooded in 1914. 12. Experiments were carried out with firing 64-pounder shells into full scale replicas of the cork compartments and coffer dams . 13. Setbacks during construction included flooding of the coffer dams used in the building of the piers that supported the bridge. 14. First, the power house was constructed after a circular coffer dam was set on the right side of the river. 15. The company signed contracts Wednesday to dam the Yangtze River in November 1997 and then build a coffer dam , Xinhua said. 16. The fuel tanks copied British practice and consisted of cylinders or coffer dams separated from the ship's hull by water-filled compartments. 17. After the 1972 flood, Alcan built a coffer dam to prevent the river from taking the route around the falls again. 18. A coffer dam , two earth dikes, excavation and preparations of the foundations of the dam were also completed before construction began. 19. First of all, a large coffer dam was built, constructed of two rows of steel plates between which a of sand was tipped. 20. In 1947, diversion of the Savannah River and construction of a coffer dam began while the contract for the actual dam was awarded.
