Gov. Gavin Newsom is pushing his proposal for a 45-mile water tunnel beneath California's Delta, saying it's vital for the ...

The rugged geography, dense population, and arid nature of Southern California has created the need for some of the most unique and complex tunnel systems anywhere in the world, and over the last ...

The Delta is the exchange point for half of California’s water supply, and the tunnel is an extension of the State Water Project, which was built in the 1960s. It’s a 700-mile maze of ...

The earliest tunnels in Southern California were built for shelter, or mining purposes, but as civilization encroached, the region’s mountainous terrain required tunnels for railroads, aqueducts ...

California Gov. Gavin Newsom's administration says it will cost more than $20 billion to build a giant tunnel to capture and store more water.

Tunnel 41 allows people on the California Zephyr to pass through the most treacherous part of the California trail with ease.

There are many other great tunnels in Southern California, along with thousands of important water, sewage, and drainage tunnels crisscrossing the region, but we’ll have to cover those another day.

The earliest tunnels in Southern California were built for shelter, or mining purposes, but as civilization encroached, the region’s mountainous terrain required tunnels for railroads, aqueducts ...