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$1.95 Billion Lower San Joaquin River Project Marks Milestone as Critical Tenmile Slough Levee Segment Is Completed in Stockton Before El Niño Winter

Friday, October 30, 2026 · California · GSM News

The California Department of Water Resources (DWR) announced on October 30 that a critical segment of the Tenmile Slough levee in Stockton, in San Joaquin County, California, has been completed in time for an El Niño winter. DWR joined officials from the U.S. Army Corps of Engineers, the Central Valley Flood Protection Board, and the San Joaquin Area Flood Control Agency to mark the completion of the levee segment and a major milestone in reducing flood risk for the City of Stockton.

The Tenmile Slough levee is a critical component of the larger Lower San Joaquin River Project, a $1.95 billion project funded by the California Department of Water Resources, the U.S. Army Corps of Engineers, and the San Joaquin Area Flood Control Agency. Once completed, the project will provide improved flood protection for 122,000 residents and $28.7 billion in property along the San Joaquin River for the North and Central Stockton area.

"Over the past decade, significant investments across the Central Valley Flood System have driven down flood risk for our communities. This newest completed levee segment demonstrates how those investments are paying off," said Laura Hollender, DWR deputy director of flood management and dam safety. "With El Niño anticipated to impact California this winter, the State is making sure our flood system is ready before the first storm arrives."

Before the completion of this project, the Tenmile Slough levee segment was rated as the most critically deficient in the Central Valley levee system. Following historic flooding in 1997, DWR and the Central Valley Flood Protection Board identified significant flood risk in the San Joaquin River Basin, and federal, state, and local partners worked together to evaluate and design the improvements. Other completed flood projects for Stockton include the Smith Canal Gate Structure, a $94 million project providing flood protection for 24,000 homes in central Stockton, DWR said.

Source: GSM · USA (original Chinese edition)

Photo: 图:加州斯托克顿市中心。LPS.1 摄,CC0,经 Wikimedia Commons。 / Downtown Stockton, California. Photo by LPS.1, CC0, via Wikimedia Commons.

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