California Gov. Gavin Newsom's controversial push to fast-track the Delta Conveyance Project received a formal endorsement ...

A $2 billion tunnel has been proposed to bypass "Last Chance Grade" — a landslide-plagued portion of Highway 101 in rural ...

Nation’s largest irrigation district steps in with support California’s long-debated Delta Conveyance Project received a ...

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 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 ...

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.