The most dangerous phase of Hoover Dam's construction was building the diversion tunnels, two on each side of the Colorado River. Blasting holes 56 feet in diameter, three-quarters of a mile ...

Progress is being made on the maintenance and repair of the Lesotho Highlands water tunnel, which was shut down more than a month ago to undertake the critical work that will ensure longevity of the ...

For those having ponds, there is eventually a need for maintenance of the pond and dam. Most of the time, this can be done ...

Just as with wine, aging a sake can produce a smoother drink, but there is a cost in maintaining the right conditions for ...