In the 1930s, workers bored a 13-mile tunnel beneath Mt. San Jacinto. Here's a look inside the engineering feat that carries ...

DC Water breaks ground on a 5.5-mile tunnel under D.C. to capture sewage overflows, aiming to cut Potomac River pollution by ...

The Newsom administration is pushing to build a $20-billion water tunnel. As state regulators hold hearings, the fight over ...

The bonds could raise $16 billion, or more, for planning and building the massive Delta tunnel project, which would divert billions of gallons of water from the environmentally sensitive San Joaquin ...