![I've been in cofferdams surrounded by ground, but being in one surrounded by water is almost too unnerving. : r/civilengineering I've been in cofferdams surrounded by ground, but being in one surrounded by water is almost too unnerving. : r/civilengineering](https://i.redd.it/w5wxs0pbw0j91.jpg)
I've been in cofferdams surrounded by ground, but being in one surrounded by water is almost too unnerving. : r/civilengineering
![The “cofferdam technique” is used for building the foundation for a bridge. In this method, a wall enclo… | Unbelievable facts, History facts interesting, Fun facts The “cofferdam technique” is used for building the foundation for a bridge. In this method, a wall enclo… | Unbelievable facts, History facts interesting, Fun facts](https://i.pinimg.com/736x/94/53/c4/9453c4c6c6e14561ded8eeeb7f89af43.jpg)
The “cofferdam technique” is used for building the foundation for a bridge. In this method, a wall enclo… | Unbelievable facts, History facts interesting, Fun facts
![Concrete pour for bridge pylons marks next step for the Mersey Gateway Project | The Mersey Gateway Project Concrete pour for bridge pylons marks next step for the Mersey Gateway Project | The Mersey Gateway Project](https://merseygateway.co.uk/wp-content/uploads/2015/08/Mersey-Gateway-cofferdam-concrete-pour-visualisation-1024x562.jpeg)