Sites Reservoir: Water for Dry Years
Now more than ever, California needs innovative solutions to ensure we have a sustainable water supply. Our climate has changed, and we need more storage as the West gets drier and hotter to ensure we have enough water to meet our needs.
Sites Reservoir is a unique, multi-benefit water storage project that will capture and store water from major storms, so water is available to California’s communities, farms, and environment during dry periods.
The water that Californians use for drinking, recreating and protecting the environment moves through a system that is arguably the most complex in the world.
Sites Reservoir Benefits
- Reliable dry-year water supply for California’s communities, farms and environment
- Dedicated environmental water for native fish, migratory birds, and their habitats
- Adaptable to climate change
- Contribution to California’s renewable energy goals
- Flood management
- Recreational opportunities
- Job creation, including a large skilled workforce during construction
Sites Reservoir Fast Facts

Creates additional 1.5 million acre-foot off-stream storage for drier periods

Increases Sacramento Valley water storage capacity

Creates reliable supplies for environmental, agricultural, and municipal uses

30 participating agencies representing communities across California

A Part of the Sacramento Valley
Sites Reservoir would be located on the west side of the Sacramento Valley, near Maxwell, California – a rural farming town in Colusa County, approximately 65 miles northwest of Sacramento. The Sacramento Valley is known for its farming community, rich agricultural benefits, and natural beauty. The region’s acres of grassland surrounded by rolling foothills make it an ideal location for off-stream water storage. The proposal is widely supported by local community leaders, residents, as well as state water managers and water agencies from the Bay Area to Southern California.
A 21st Century Water Storage System
Sites Reservoir is a water savings account for dry years. It would capture and store stormwater flows from the Sacramento River—after all other water rights and regulatory requirements are met—and release the water for California communities, farms, and environmental agencies to use when it is desperately needed.
Sites Reservoir complements other major reservoirs like Shasta, Oroville, and Folsom, which function as the backbone to both the Central Valley Project and the State Water Project. Sites Reservoir will help optimize water releases from this existing network, greatly increasing the flexibility, reliability and resiliency of statewide water supplies.
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California’s water future starts here. 💧 Watch this video to find out what local benefits Sites Reservoir will bring to the Sac Valley. 🔗 Learn more at SitesProject.org. Link in bio. #SitesReservoir #WhySites #SitesStartsHere #CaliforniaWater

Sites Reservoir will integrate with California’s existing water management system, exchanging water Folsom Lake, Lake Shasta, and Lake Oroville to reduce flooding and deliver water where it’s needed.
🔗 Visit SitesProject.org to learn more.

Last month, the Sites Project Authority invited potential contractors to tour the Sites Reservoir project site.
As the Project advances toward construction, the Authority is searching for a Construction Manager at Risk (CMAR) to construct the reservoir and roads package. 🚧 🛠️
This process marks a significant step towards construction and operation of Sites Reservoir, which is anticipated to break ground in 2026!

California’s water future starts here. 💧 Watch this video to learn how Sites Reservoir will create a stronger agricultural economy. 🔗 Learn more at SitesProject.org. Link in bio. #SitesReservoir #WhySites #SitesStartsHere #CaliforniaWater

Sites Reservoir is designed to cooperate with existing water storage infrastructure to provide reliable dry year water supply to California’s communities, farms and the environment.
👉 Learn more at SitesProject.org

Water is engrained in our daily lives. If left unaddressed, California’s water supply will become increasingly vulnerable to climate change.
That’s why Sites Reservoir is designed to collect excess water during heavy rainfall and store it for drought years, when it is needed for California’s
🌾 farms,
🏡 families,
🐟 fish
🦆 and fowl.
🔗 Learn more at SitesProject.org. #BuildSitesNow

Sites Reservoir was awarded an additional $134 million in federal funding from the Water Infrastructure Improvements for the Nation Act (WIIN Act), underscoring the federal government`s continued , bipartisan commitment to securing California’s water future. 🔗Learn more at the link in our bio.

Did you know: Sites Reservoir will be California’s FIRST and ONLY reservoir designed to store water specifically for the environment.
In dry and critical years, Sites will provide cold water supply for endangered salmon populations and restore wetland habitats for migrating bird species.
🔗 Learn more at SitesProject.org
