California is investing in a $275 million infrastructure project in the Mojave Desert to secure long-term water supply for Southern California. With growing uncertainty around the Colorado River and Northern California imports, the project offers a new local solution that could serve up to 400,000 people.

Source: Cadiz

Led by Cadiz Inc., the Cadiz Water Supply and Storage Project is designed to create a reliable and sustainable water source by tapping into an underutilized aquifer beneath privately held land. The water will be captured and stored during wet years. Once captured it will be delivered through a new 43-mile pipeline connection to the Colorado River Aqueduct during dry spells. Global design and engineering firm Stantec has been brought on to oversee planning and design.

Watch this video for more information on the science behind the project.

Beyond water security, the project promises significant economic and environmental benefits. Using water with lower salinity than current Colorado River sources will help local providers cut treatment costs. This is estimated to save ratepayers an estimated $400 million over the project’s 50-year lifespan. It also means safer water with less wear on pipes and sewer systems.

The Cadiz project is expected to inject $878 million into the local economy and create nearly 6,000 well-paying jobs, with a majority earmarked for local residents and unions. An ongoing contribution of $6 million annually will support San Bernardino County’s budget, including dedicated funds for local schools.

Environmental concerns have been front and center throughout development. The project has undergone extensive review from independent scientists, state agencies, and courts. The combined parties have concluded it will not harm the desert ecosystem. A strict groundwater management plan is set so the project can be paused if aquifer levels fall below a safe threshold. This decision puts long-term environmental health on equal footing with infrastructure goals.

By combining forward-thinking water storage and strong environmental oversight, the Mojave Desert project offers a future model for water supply in dry regions.

Want more stories like this? Subscribe to our newsletter for weekly updates on infrastructure, sustainability, and the future of construction.