| A pump should be placed upstream of this cofferdam to pump streamflow around the work area and back into the stream. |
| Excess materials left over from stream bank rehabilitation and cofferdam materials, etc. should be disposed of at an approved dump site. |
| The role of the cofferdam is to dewater the future dam site by redirecting the river water into the diversion tunnel. |
| The whole was built in a cofferdam, quite dry, and the opening was a holiday. |
| First, a cofferdam will close off the right branch, while the river flows through the main and left branches, which will be left open. |
| The gate, of the flap variety already mentioned, was floated and stepped into place by divers after the removal of the cofferdam. |
