Groundwater and Need for Temperance Flat Dam

temperance flat dam

Groundwater and Need for Temperance Flat Dam

March 7, 2019

To Deal with SGMA, Temperance Flat Dam Must Be Built

By Jessica Theisman, Associate Editor

The Sustainable Groundwater Management Act, also known as SGMA, is seen as dire for the future of farming as we know it in the San Joaquin Valley. One thing that could help reduce the threat of SGMA is more storage for surface water deliveries—increased storage such as the proposed Temperance Flat Dam.

Mario Santoyo is the executive director of the San Joaquin Valley Water Infrastructure Authority. For decades, Mario Santoyo has been pushing for the construction of Temperance Flat Dam.

"With this new groundwater sustainability law coming into play, it is going to basically shut down a lot of farming,” he said.

If farmers cannot prove that they are putting in as much water as they are taking out of the ground, they will lose their access to the groundwater pumps.

“Farming in the Central Valley is in for a world of hurt. The only thing that can help us won't solve everything but can help us,” Santoyo said.

It is a major step in the right direction to be able to manage high runoff water that we are otherwise losing to the ocean—meaning millions and millions of acre-feet lost into the ocean.

“Building Temperance Flat, which would provide us additional storage opportunities up to additional 1.2 million acre-feet, will allow us to have carry over water from year to year,” Santoyo said. "This would come in handy when we hit dry years here in California. It would allow us to move water from above ground to below ground, stabilizing our groundwater condition."

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