Planned NorCal reservoir gets state funding boost amid ballooning price tag

By Camille von Kaenel | 08/22/2025 12:22 PM EDT

The state’s largest proposed reservoir in decades is getting money from another project that collapsed amid funding disagreements.

A woman walks along the banks of the American River flowing by the American River Parkway in Rancho Cordova, Calif., Friday, April 8, 2022. Democratic Assemblymen Ken Cooley, of Rancho Cordova, Jim Cooper, of Elk Grove, and Kevin McCarty, of Sacramento, announced they were introducing a bill to protect parklands from environmental harm due to illegal camping and would designate areas like the parkway as "special parklands." (AP Photo/Rich Pedroncelli)

Gov. Gavin Newsom (D) has thrown his weight behind the planned reservoir off the American River. AP

SACRAMENTO, California — California officials are pumping up their spending on the state’s largest proposed reservoir in decades after a new cost estimate showed a ballooning price tag.

What happened: The California Water Commission unanimously approved increasing its allocation of money from a 2014 water bond, Proposition 1, to the Sites Reservoir Project by $218.9 million to $1 billion total on Wednesday. The boost came from funds it had previously allocated to an expansion of the Los Vaqueros reservoir in the foothills between the Central Valley and the Bay Area, which fell apart last year amid disagreements between local agencies over who should pay for what.

The new funding doesn’t completely make up for the rising price tag for the project, which the Sites Project Authority now estimates at between $6.2 billion and 6.8 billion instead of the 10-year-old $4.5 billion estimate because of inflation. But backers still welcomed the boost as a positive sign.

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“We’re excited about the state’s participation,” said Jerry Brown, the Sites Project Authority’s executive director. “It’s a positive.”

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