Fresno‑area residents have a new reason to celebrate as the state‑funded Salmon Conservation and Research Facility, opened in May 2025 near Friart, begins delivering measurable gains for the San Joaquin River’s long‑lost Chinook salmon run.
High‑tech hatchery and careful genetics
Inside the modern hatchery, technicians use ultrasound and transponder tags to assess adult females and select the least‑related males for breeding. This focus on genetic diversity, explained by senior environmental scientist Brian Erlandsen of the California Department of Fish and Wildlife, gives the fledgling population the ability to adapt to changing river conditions.
Progress against a historic decline
Before the 1942 completion of Friant Dam, an estimated 200,000‑500,000 adult Chinook salmon returned each year. The dam dried a 150‑mile stretch of the river, wiping out the run for more than six decades. Since the 2006 settlement that created the San Joaquin River Restoration Program (SJRRP), the hatchery has released roughly 220,000 juveniles annually.
In the summer of 2025, 448 adult spring‑run Chinook salmon returned – the highest count since juvenile releases began in 2014. Most of those adults were raised from juveniles released in 2023 and benefited from higher river flows during their out‑migration. By contrast, only 54 adults returned in 2024, reflecting drier conditions that year.
Infrastructure to open the river
While hatchery releases are a key piece, the program also targets four major passage projects that will allow salmon to move freely past historic barriers. The first, a bypass channel around Sack Dam and the Arroyo Canal east of Dos Palos, began construction in 2025 with a $93 million federal contract. When completed, adult salmon will use a ladder and ramp to travel upstream, and juveniles will pass downstream through a control structure.
Additional work includes a half‑mile channel around Mendota Pool, a fish ladder, reverse‑flow facilities, and a new south‑end dam. Senator Alex Padilla has introduced legislation to provide an extra $500 million for these efforts, with the Senate Energy Committee advancing the bill in July.
Looking ahead
Program manager Don Portz, a Bureau of Reclamation fish biologist, estimates full river navigability for salmon by 2035 – well beyond the original 2014 settlement deadline but a realistic target given the scale of the undertaking. He praised the progress, saying, “We’re doing pretty darn good right now and gaining steam.”
The hatchery’s capacity can eventually reach one million juveniles per year, and plans are already under way to increase releases for the 2027 spring run. Local farmers and water users remain engaged, as the SJRRP balances ecological recovery with the region’s agricultural water needs.
Community impact
Beyond the ecological benefits, the project revives a cultural heritage once celebrated by Fresno residents who recalled salmon runs so abundant they could hear the splash of fish at night. Restoring the river’s native species aligns with the community’s desire for a healthy environment, robust agriculture, and a sense of place rooted in the valley’s natural history.
Original reporting: Fresnoland — read the source article.
