The team must build strong abutments that will prevent the bridge from sinking into the river's soft muddy banks. The first job is to build a dam.
Woven strips of bamboo are put into place to give the dam shape. The men shovel in clay to make a watertight barrier. When this dam is complete, water is bailed from the space where the abutment will be built.
The men pound 36 piles a full six feet into the sub-soil.