DWR Updates

Aerial view of the Sacramento-San Joaquin Delta.

The status quo in the Delta is not an option and puts the state’s clean water supply at risk.

Aerial view of McCormack Williamson Tract.

Driving along Interstate 5 south of Sacramento, you wouldn’t notice anything unique about the land stretched out beyond your car window. But hidden between Interstate 5 and Walnut Grove, lies one of the most important environmental restoration sites in the Sacramento-San Joaquin Delta.

Aerial view of the Sacramento - San Joaquin Delta, looking east along the San Joaquin River.

Rain and snowmelt from the Sierra Nevada flows through the Sacramento-San Joaquin Bay Delta and supplies drinking water—through the State Water Project (SWP)—to 27 million people. Yet the reliability of this critical water supply is compromised.

A view of the Lake Oroville main spillway in Butte County, California. The spillway gates are designed with seals to minimize leakage around the edges of the gate. This modest leakage is beneficial with respect to reducing friction when the gates are operated.

Due to late precipitation and based on inflows, DWR has taken steps to prepare for potential use of the spillway.

iew of the newly completed Calaveras Dam, towards the intake tower, near Milpitas.

On May 31, we commemorate National Dam Safety Awareness Day, a day to reflect on lessons learned from past dam incidents and to persevere in our core commitment toward public safety by ensuring that California's dams remain safe, operational, and resilient.