Its builders have simultaneously pushed ahead with the projects for extending and covering the waterway tunnel in the flames of campaign in which one overtakes and learns from others and swaps experiences with each other.

They have made accessory parts needed for such equipment as vibration rollers, mixers, winches and mine cars after building solid bases for self-reliance, thus attaining good results in the construction.

More achievements have been made amid the emulation drive for concentrated transport of cement.

Sci-tech problems arising in the construction are solved by giving full play to the builders' creative enthusiasm.

Officials and members of the shock brigade in charge of the main waterway tunnel construction have introduced rational construction methods and technical innovations to hasten the project.