Eyewitness News got a rare look inside an underground portion of the Colorado River Aqueduct that runs through San Jacinto that was built almost 100 years ago entirely by hand.

If we are to take seriously the threats of drought, climate change and water security, we should not reduce this place to a warring of two — or even many — sides.

The Webster Tube will close two nights this week for maintenance, according to Caltrans. The underwater tunnel that carries ...

The bill highlights the growing need for additional oversight of the vast tunnel system into the U.S. Since 1990, more than 140 tunnels have been found leading into the country.

All lanes of westbound Highway 24 in Orinda are shut down Wednesday, according to the California Highway Patrol. Investigators are on the scene investigating a possible freeway ...