After the last severe break in sea walls and dikes? in 1953, a prestigious project was conceived, called Delta Werken. This project was meant to improve the safety of the lower areas of The Netherlands from severe storms and flooding. Among other things, coastal dunes along the entire country were raised by as much as 5 meters and several large scale construction projects were undertaken. The most sophisticated and famous of these is the Oosterscheldedam, which is a dam that can be opened and closed at will, thereby both keeping the violence of the sea out, but preserving the saltwater climate in the river delta for wildlife and the fishing industry.