The recently released “Water Renaissance” plan, a product of “conservation groups and tribes,” gets a very big idea right. There is no reason why California’s coastal megacities should have to import water. With that one visionary presumption, this report has made a major contribution. In fact, it doesn’t go far enough. With massive, targeted investments,...

Whether it’s an energy project or a water project, it’s important to avoid conflating capacity with actual production, or yield. With energy projects, that difference is much more certain than with water projects. For example, in 2024, California’s lone remaining nuclear power plant at Diablo Canyon, with an output capacity of 2.4 gigawatts, would have produced...

For most of the previous century, Californians successfully designed and built big water infrastructure. In sixty years, from 1910 through 1970, we built the most impressive system of interbasin transfers in the world. The Los Angeles Aqueduct, Hetch Hetchy Aqueduct, Colorado River Aqueduct, Delta Mendota Canal, Friant-Kern Canal, and California Aqueduct. Altogether these conveyances are...

A few months ago I had the privilege of speaking directly with some of the top executives at one of California’s largest water agencies. Their primary question for me was explicit, and my attempts to answer were inadequate. They contend, accurately, that during the last century there were periods when massive federal funding to pay...

One of the most controversial water issues in California is the proposed Delta Conveyance. The 45-mile-long tunnel will have the capacity to move up to 4 million acre feet per year from the Sacramento River safely under the fragile delta ecosystem, delivering water to southbound aqueducts. That’s not bad. But the reservoir storage necessary to allow the...

Dams and aqueducts on the Colorado River make civilization possible in the American Southwest. But for the last 20 years, as a prolonged drought has gripped the region, withdrawals from the river have averaged 15 million acre-feet per year, while inflows into Lake Mead and Lake Powell have averaged only 12 million acre feet per year. For the first...

On February 21, the California State Water Resources Control Board waived environmental regulations in order to permit more storage in Central Valley reservoirs. This came a week after Governor Gavin Newsom temporarily suspended environmental laws that prevent reservoir storage if flow through the Sacramento-San Joaquin Delta falls below 58,000 acre feet per day. A guest opinion piece...