The goal is to upgrade the massive system that sends water to 27 million people, mostly in Southern California, and vast ...

The leak was discovered around 12:30 p.m. in the south tube on the Queen’s side of the tunnel, officials said. Water entered ...

Currently, around 40 million gallons of stormwater combined with untreated sewage overflow into Piney Branch each year. This ...

The immersed tube method, a version of the cut and cover technique, is a cheap and easy way to construct a tunnel under water -- and it's generally the fastest way. Here's how it works ...

Also contributing to the decision was the finding that the levels of water and slush were rising significantly inside the tunnel. The assessment of the conditions inside the tunnel was made after ...

The NDRF teams noticed an earth fracture on a side of the tunnel wall, from where the seepage water was gushing in and the roof of the collapsed area was very unstable as the noises of shifting ...

rehabilitate and upgrade the 19-mile-long Mountain Tunnel, a key component of the Hetch Hetchy Water System that takes water from Tuolumne County and sends it to San Francisco. The San Francisco ...

Rescue officials believe a massive 3,200 litres of water is flooding the tunnel every minute, mixing with the vast quantities of sand, rock, and debris to make more mud and slush. This is not ...