Delta Conveyance Design and Construction Authority

Much of California’s water infrastructure was built decades ago for a very different climate.

Today, changing conditions are putting new pressure on that system.

Projects like the Delta Conveyance Project are designed to modernize critical infrastructure and help improve water reliability for the long term.

California is seeing fewer rainy days, but bigger storms.

That means we need infrastructure that can capture water when it’s available and deliver it when communities, farms, and the environment need it most.

The Delta Conveyance Project is designed to help California make the most of these critical storm events.

The DCA Document Library now has improved search and browsing tools to help you find meeting materials, reports, and other project information.

👉Explore the library: https://dcdca.org/info-center/document-library/

The Bethany Complex connects the Delta Conveyance Project to the California Aqueduct.

After traveling 45 miles underground, water will arrive here before moving into the State Water Project system.

Learn more about the Bethany Complex: https://dcdca.org/download/bethany-complex-fact-sheet/

The Sacramento–San Joaquin Delta is the hub of California’s water delivery system.

Water moves through the Delta to reach communities, farms, and businesses across the state.

The Delta Conveyance Project is designed to help strengthen this critical part of California’s water system.

California’s water system faces growing challenges.

🌊 Sea-level rise
🌎 Earthquake risk
💧 Changing hydrology

These factors increase the potential for water supply disruptions. The Delta Conveyance Project is designed to improve system flexibility and resilience by capturing more water during high-flow periods for use in drier times.

DCA Executive Director Graham Bradner recently authored an op-ed explaining how the Delta Conveyance Project cost estimate was developed, what it includes, and how it will be refined as engineering advances. The piece reflects DCA's commitment to transparency as the project moves through each stage of design.

Read more: https://mavensnotebook.com/2026/04/03/commentary-how-the-delta-conveyance-project-is-being-designed-with-sound-engineering-and-transparency/

The Delta Conveyance Project is designed to strengthen California’s water system with modern infrastructure built for long-term reliability and resilience.

From a 45-mile underground tunnel to North Delta intakes designed to capture up to 6,000 cubic feet per second during high-flow events, each element plays a role in improving how water is conveyed while reducing surface impacts.

Bethany Reservoir is the starting point of the State Water Project’s California Aqueduct.

The Delta Conveyance Project (DCP) will include the Bethany Complex, designed to pump water from the DCP to the Bethany Reservoir Pumping Plant. From there, water will be lifted into Bethany Reservoir, where it enters the California Aqueduct for delivery across California.

Learn more:https://dcdca.org/wp-content/uploads/2023/11/DCA-Bethany-Complex-Fact-Sheet.pdf

More stable State Water Project deliveries help local water agencies reduce the severity and frequency of water shortages, fill reservoirs more often and enter droughts with higher reserves.

The Delta Conveyance Project is designed to strengthen SWP reliability so communities and farms can plan with more confidence, in wet years and dry ones.