Biologists assumed baby winter-run Chinook salmon hung out in the Sacramento River where they hatched until they grew large enough to make the trip downstream to the Pacific Ocean. A recently released scientific study challenges that assumption – and may have implications in how fisheries agencies manage Sacramento Valley waterways to protect the critically endangered fish.

Anthony Cupaiuolo has been skiing the Sierra Nevada backcountry near Lake Tahoe since 1997. But over the last decade, he’s noticed some changes. “Outside of last year, which really sticks out as an anomaly, we haven’t seen [snow] coverage down at lower elevations nearly as much as we would in the late ’90s and early 2000s,” said Cupaiuolo, who usually skis at least 80 days every winter, with a majority of them spent in the backcountry.

State lawmakers opposed to Gov. Jerry Brown’s Delta tunnel plan are stepping up calls for greater transparency into the project’s finances, as the proposed water delivery system suffered a series of setbacks this fall. At a Thursday town hall in the Delta town of Walnut Grove, lawmakers representing the region called on the Brown administration to drop the tunnel plan in the absence of greater cost certainty.