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Part of the solution to California’s demand for water in the face of the state’s crippling drought may lie 10,000 feet beneath the surface of the state’s Central Valley. New research published in the journal PNAS suggests that the region’s aquifers, areas deep underground where water can collect, have three times the usable groundwater as previously estimated.

“It’s not often that you find a ‘water windfall,’ but we just did,” said study author Robert Jackson, a professor at Stanford University, in a press release. “There’s far more fresh water and usable water than we expected.”

Drought-stricken California might have a hidden water bonanza. A Stanford University study released Monday said the state has three times more groundwater located in deep aquifers than earlier estimated.

The research, published in the journal Proceedings of the National Academy of Sciences, said this water source is much deeper than traditional aquifers and that tapping it would likely require a lot of money and engineering expertise.

Drought, extreme heat and high winds have fueled wildfires across the western U.S. this month. But another enemy is driving California’s most destructive blaze of the fire season so far: tens of millions of dead trees.

The Bureau of Reclamation announces the selection of three California water districts to receive $3 million total in Agricultural Water Conservation and Efficiency grants for Fiscal Year 2016. The grants, combined with local cost share contributions, total more than $6 million slated for water management improvement projects to be implemented during the next two years.

The AWCE program is a joint effort with the Natural Resources Conservation Service to promote district level water conservation improvements that facilitate on-farm water use efficiency and conservation projects. With NRCS support, Reclamation selected three projects for funding.

In a decision that could delay or complicate Gov. Jerry Brown’s plan to build two huge tunnels in the Sacramento-San Joaquin Delta, a Superior Court judge ruled Friday that a comprehensive management plan for the estuary is no longer valid.