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

The San Jacinto Tunnel is a 13-mile-long, concrete-lined water tunnel built between 1933 and 1939, carrying Colorado River ...

The Colorado River is starting to swell with spring runoff, but just a few months ago, Avi Stopper clocked a gap in the ...

It's the final leg of the massive Colorado River Aqueduct: the 13-mile-long San Jacinto tunnel, bringing up to 1,700 cubic feet of water per second underneath one of Southern California's tallest ...

In 1928, the Metropolitan Water District was formed for the express purpose of building the Colorado River Aqueduct and transporting the water to the city. March 12 of that same year, the St ...

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

Completed in 1939, the tunnel was a cornerstone in the construction of the 242-mile Colorado River Aqueduct. It enabled the delivery of as much as 1 billion gallons of water per day. The tunnel is ...

Completed in 1939, the tunnel was a cornerstone in the construction of the 242-mile Colorado River Aqueduct. It enabled the delivery of as much as 1 billion gallons of water per day. The tunnel is ...