California Gov. Gavin Newsom is pledging to fast-track more than half a dozen projects by the end of his term to remove or bypass dams that have blocked salmon from returning to the state’s chilly mountain streams and acting as the keystone of a complex ecosystem that sustains both economies and spiritual beliefs for tribes.

Newsom — now in his second term and seen as a potential Democratic presidential candidate beyond 2024 — has worked hard to stake a claim as the nation’s most environmentally-conscious governor. But his record has been dogged by criticism from environmental groups who say his water policies benefit big agriculture at the expense of salmon and other fish species in danger of becoming extinct.

Millions of salmon once filled California’s rivers and streams each year, bringing with them key nutrients from the ocean that gave the state an abundance of natural resources that were so important to indigenous peoples that they formed the foundation of creation stories central to tribes’ way of life.

But last year, there were so few salmon in the state’s rivers that the officials closed the commercial fishing season.

Frustrated by the criticism leveled against his administration, Newsom on Tuesday released his strategy to protect salmon — a plan that includes a heavy helping of projects that would remove or bypass aging dams that prevent salmon from returning to the streams of their birth to lay eggs.

“These are tangible. And so much of the work we do is, you know, you can’t see it, you can’t feel it,” Newsom told The Associated Press in an interview near the banks of the Elk River in Eureka near a recently completed project that returned agricultural land to a flood plain habitat for salmon. “But when you see a dam being removed and you come back a few months later — a year or two, five years later — and you see real progress.”

Newsom’s strategy includes a promise to complete an agreement by the end of the year to remove the Scott Dam and replace the Cape Horn Dam along the Eel River that have blocked salmon access to 288 miles (463 kilometers) of habitat. Once completed, the Eel would be the longest free-flowing river in the state, flowing north through the Coast Ranges before emptying into the Pacific Ocean near the town of Fortuna. The two dams are owned by Pacific Gas & Electric and no longer produce hydropower.

By next summer, Newsom said he would complete plans for the removal of the nearly 100-year-old Rindge Dam along Malibu Creek in western Los Angeles County that would give steelhead another 15 miles (24 kilometers) of spawning and rearing habitat. And by 2026 — the last year of Newsom’s term — he promised to complete the infrastructure necessary to remove the Matilija Dam in Ventura County along a tributary of the Ventura River. The dams are no longer functional.

The removal projects have already been announced and are in the early stages of development. Newsom’s plan puts on record his goal to either complete them or have them approved by state regulatory bodies before he leaves office.

“I got three more years. And I want to put it all out there,” Newsom said.

Newsom’s embrace of some dam demolitions comes as the largest dam-removal project in U.S. history got underway in earnest last week when crews blew a hole in the bottom of the Copco No. 1 dam along the Klamath River near the California-Oregon border. It is one of four dams set to be removed along the Klamath. In the Pacific Northwest, tribes and environmental groups want to see four dams along the Snake River removed. The Biden administration has stopped short of promising to do so, but it has pledged $1 billion for salmon restoration.

Newsom is also trying to bring attention to some of the $800 million he has approved in recent years for projects that return some creeks and streams to their natural state so that salmon can live there.

On Monday, Newsom trudged through thick mud to visit a project along Prairie Creek in Redwoods National Park. The creek had been converted to a ditch, with steep rock walls preventing the water from spilling into a flood plain where baby salmon can eat and grow before heading to the ocean. The goal is to get the baby fish to stay longer in the creek so they can grow larger before leaving — making it more likely they will return.

Newsom watched as Kate Stonecypher, a graduate student at Cal Poly Humboldt, pulled juvenile coho salmon and steelhead trout tagged with tracking devices from the river. Researchers are still studying the results. But early indications have been positive. Fish from the creek were later found to travel 50 miles (80 kilometers) to Humboldt Bay.

The biggest criticism of Newsom’s environmental policies have not been a lack of restoration projects, but a lack of water in the rivers. Newsom’s salmon strategy includes a controversial proposal to seek voluntary agreements with major farmers over how much water they can take out of the rivers and streams. Some environmental groups have called the plan “astonishingly weak.”

San Francisco Baykeeper Science Director Jon Rosenfield said California has already done lots of habitat restoration projects, but they have failed to result in significant boosts in salmon populations.

“Without the essential ingredient of a river, which is the flow of water, fish … are not going to survive,” he said. “The governor is out there promising actions that are not adequate to restore the population.”

Newsom also pledged to continue to work with native tribes, who often refer to the rivers where salmon live as their church. Newsom formally apologized to Native American tribes four years ago for how the state had treated them historically. And he has committed to partnering with them to conduct much of the work around salmon habitat.

Frankie Myers, vice chair of the Yurok Tribe, told Newsom the tribe’s work on Prairie Creek had changed the community by restoring the tribe’s purpose.

“This goes beyond that apology. This is about restoration,” he said.