Once in place, it is filled with concrete to become part of the permanent works, such as the foundation for a bridge pier.
The bridge piers themselves are poured concrete and offer improved ship collision protection.
The bridge piers were extensively repaired again in 1913.
He added that the bridge piers would be built at night.
The highway people worry about it undercutting some of the bridge piers eventually.
Also, late in 2005, bridge piers were installed and put into place for bridge construction on the west end of the project.
It was thus possible to assemble a bridge pier and lower it complete onto the river bed.
This, in turn, caused the barges he was controlling to collide with a bridge pier.
A bifurcation may also be man-made, for example when two streams are separated by a long bridge pier.
Despite the race distance being only 50 metres to the bridge pier, many of the crafts struggled going against a strong head wind.