ABSTRACT
One of the characteristics of the river hydraulic schemes is the essential need, in the course of the entire period of construction, to divert the river water from the dam site, i.e. to give passage to that water. This is ensured by means of a series of individual structures: cofferdams (temporary dams), embankments, channels, and tunnels, as well as by utilizing the permanent works of the hydraulic scheme, temporarily, for this purpose, as well.
