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· collected 2026-08-21 · by TOI World Desk
A California dairy farmer's gift in 2001 led to the restoration project that has reconnected the San Joaquin River to over 220 acres of historic floodplain habitat after more than 75 years of being cut off. The Grasslands Floodplain Restoration Project, completed in February 2026, involves breaching sections of old levees and returning the river to its natural overflow across the grasslands. American Rivers led the project's implementation in partnership with California State Parks, River Partners, and Flow West. The restoration is expected to benefit wildlife, including threatened and endangered fish species like Chinook salmon, by providing a variety of ecosystem services such as habitat, food, and shelter.
Written by the local model on 2026-08-21,
using this article's own text rather than the other coverage of the
same event (that is the story summary below).
For over 70 years, a section of California’s San Joaquin River was cut off from the land it once naturally fed.
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it → cut → land
Old levees, not built to hold back a river but to hold cattle, had quietly changed the landscape.
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levees → build → landscape
Then in 2026 crews started to undo that history.
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crews → start → history
Great Valley Grasslands State Park, outside Merced, was the scene of a celebration on June 11, as dozens of scientists, Tribal leaders, state officials, conservationists and community members gathered to mark the completion of a restoration project that took more than 15 years to bring to fruition.
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that → gather → fruition
The Grasslands Floodplain Restoration Project, finished in February 2026, has reconnected the San Joaquin River to over 220 acres of historic floodplain habitat.
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Project → finish → habitat
The project is returning the river to its natural overflow across the grasslands, by breaching sections of old levees.
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project → return → levees
It’s a remarkable environmental turnaround — and one that began with an unlikely gift from a California dairy farmer and cheesemaker.
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that → ’ → farmer
A river at last finds its way home
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river → find → way
According to the American Rivers website news report, the June gathering was more than a ceremonial occasion.
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gathering → accord → occasion
After speeches by state officials, tribal representatives and conservation leaders, attendees walked along the San Joaquin River to the newly breached levee.
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attendees → walk → levee
A red ribbon was draped across the new channel.
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ribbon → drape → channel
It is reported that American Rivers led the project’s implementation, in partnership with California State Parks, River Partners and Flow West.
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Rivers → report → Parks
The event was one of five spotlight events highlighting conservation efforts across the state as part of California State Parks Week.
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event → highlight → Week
That’s a relay, a passing of the torch from one generation to the next to care for the land,” said Ann Willis, California regional director for American Rivers.
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Willis → ’ → Rivers
Why we care about floodplains
The report states that floodplains are much more than a coincidence of flooding.
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floodplains → care → flooding
They are some of the most productive ecosystems on earth, providing habitat for plants and animals and performing important functions for people.
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They → provide → people
When rivers can flow over their natural floodplains, water slows, filters through soil and helps recharge underground aquifers.
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water → flow → aquifers
The newly reconnected floodplain along the San Joaquin River is expected to provide a variety of benefits.
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floodplain → reconnecte → benefits
Also, seasonal flooding can help reduce invasive plants that prefer drier conditions and improve conditions for native grasses and wetland plants.
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that → help → grasses
These plants also provide food and shelter for wildlife.
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plants → provide → wildlife
It is also believed to benefit threatened and endangered fish species, including Chinook salmon.
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It → believe → salmon
And, floodplain areas can offer juvenile salmon relatively sheltered waters and access to food during a critical stage of their development.
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areas → offer → development
A home for wildlife and vernal pools
As per the report, seasonal flooding can also create vernal pools, temporary wetlands that form during wet periods and dry up as conditions become drier.
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conditions → create → periods
Their lives rely on seasonal patterns of water and soil that have been disturbed in many areas of California.
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that → rely → California
So, restoring those rhythms is more than just restoring water to the land.
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restoring → restore → land
It is about restoring a connected ecosystem in which water, plants, fish and wildlife can respond to seasonal cycles once more.
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water → restore → cycles
An improbable beginning: A dairy farm
If we go by the news report by American Rivers, Great Valley Grasslands State Park has a story with a peculiar beginning.
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Park → go → beginning
Joseph Gallo was a former dairy farmer who built a successful cheese business.
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who → build → business
In 1982, he donated thousands of acres of Central Valley grasslands to the U.S. Fish and Wildlife Service and the state of California.
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he → donate → California
He requested that the land be preserved as wildlife refuges and parks.
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land → request → refuges
Today, Great Valley Grasslands State Park covers nearly 2,826 acres south of Modesto and west of Merced.
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Park → cover → Merced
It includes one of the largest remaining areas of native grassland in California.
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It → include → California
When Gallo donated the property, old levees, built in the 1950s, still crossed the grasslands.
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levees → donate → grasslands
They were not intended to control the San Joaquin River.
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They → intend → River
Instead, they served as a means of corralling cattle within the dairy operation.
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they → serve → operation
A 15-year effort to reverse the past
More than 15 years ago, American Rivers began working with California State Parks, River Partners and other agencies, nonprofit organizations and private partners to learn how to restore the park’s native grasslands and reconnect the river to its floodplain.
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Rivers → reverse → floodplain
Permitting problems and the realities of working in an area that nature designed to flood have delayed the project.
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nature → permit → project
Weather and flooding could halt construction for months, making work impossible.
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work → halt → months
Some of the State Parks staff and engineers were involved in the project for over 15 years.
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Some → involve → years
Funding eventually came from a number of sources, including California Department of Fish and Wildlife funding through Propositions 1 and 68, California State Parks’ Cannabis Watershed Protection Program and support from Cox Enterprises.
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Funding → come → Enterprises
…and 12 more, not listed.